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From romb...@apache.org
Subject [sling-org-apache-sling-scripting-xproc] 13/49: Move Sling to new TLP location
Date Wed, 18 Oct 2017 23:26:50 GMT
This is an automated email from the ASF dual-hosted git repository.

rombert pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/sling-org-apache-sling-scripting-xproc.git

commit 4ef119205008286c82c000f7abb95eb0beba7800
Author: Felix Meschberger <fmeschbe@apache.org>
AuthorDate: Thu Jun 18 09:21:02 2009 +0000

    Move Sling to new TLP location
    
    git-svn-id: https://svn.eu.apache.org/repos/asf/sling/trunk@785979 13f79535-47bb-0310-9956-ffa450edef68
---
 LICENSE                                            | 202 +++++++++++++++++++
 NOTICE                                             |   8 +
 README.txt                                         |  38 ++++
 pom.xml                                            | 120 +++++++++++
 .../sling/scripting/xproc/XProcScriptEngine.java   |  75 +++++++
 .../scripting/xproc/XProcScriptEngineFactory.java  |  55 ++++++
 .../xproc/cocoon/generator/SlingGenerator.java     | 106 ++++++++++
 .../SlingGeneratorServletOutputStream.java         |  54 +++++
 .../generator/SlingGeneratorServletResponse.java   |  66 +++++++
 .../xproc/cocoon/transform/SlingTransformer.java   | 160 +++++++++++++++
 .../sling/scripting/xproc/xpl/XplBuilder.java      | 111 +++++++++++
 .../sling/scripting/xproc/xpl/XplConstants.java    |  32 +++
 .../sling/scripting/xproc/xpl/api/AtomicStep.java  |  23 +++
 .../scripting/xproc/xpl/api/CompoundStep.java      |  29 +++
 .../sling/scripting/xproc/xpl/api/Document.java    |  27 +++
 .../sling/scripting/xproc/xpl/api/Environment.java |  34 ++++
 .../sling/scripting/xproc/xpl/api/Input.java       |  31 +++
 .../xproc/xpl/api/MultiContainerStep.java          |  23 +++
 .../sling/scripting/xproc/xpl/api/Pipeline.java    |  24 +++
 .../apache/sling/scripting/xproc/xpl/api/Step.java |  33 ++++
 .../sling/scripting/xproc/xpl/api/XplElement.java  |  44 +++++
 .../scripting/xproc/xpl/api/XplElementFactory.java |  29 +++
 .../apache/sling/scripting/xproc/xpl/api/Xslt.java |  27 +++
 .../xproc/xpl/impl/AbstractCompoundStepImpl.java   |  56 ++++++
 .../scripting/xproc/xpl/impl/AbstractStepImpl.java |  55 ++++++
 .../xproc/xpl/impl/AbstractXplElementImpl.java     | 219 +++++++++++++++++++++
 .../scripting/xproc/xpl/impl/DocumentImpl.java     |  43 ++++
 .../scripting/xproc/xpl/impl/EnvironmentImpl.java  |  46 +++++
 .../sling/scripting/xproc/xpl/impl/InputImpl.java  |  53 +++++
 .../xproc/xpl/impl/OutputStreamWrapper.java        |  57 ++++++
 .../scripting/xproc/xpl/impl/PipelineImpl.java     |  78 ++++++++
 .../xproc/xpl/impl/XplElementFactoryImpl.java      |  52 +++++
 .../sling/scripting/xproc/xpl/impl/XsltImpl.java   |  51 +++++
 src/main/resources/META-INF/DISCLAIMER             |   7 +
 src/main/resources/META-INF/LICENSE                | 202 +++++++++++++++++++
 src/main/resources/META-INF/NOTICE                 |   8 +
 .../services/javax.script.ScriptEngineFactory      |   1 +
 .../sling/scripting/xproc/xpl/XplBuilderTest.java  |  68 +++++++
 src/test/resources/xpl/html.xpl                    |  32 +++
 39 files changed, 2379 insertions(+)

diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,202 @@
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diff --git a/NOTICE b/NOTICE
new file mode 100644
index 0000000..5c35b61
--- /dev/null
+++ b/NOTICE
@@ -0,0 +1,8 @@
+Apache Sling - Scripting - Python Support
+Copyright 2008-2009 The Apache Software Foundation
+
+Apache Sling is based on source code originally developed 
+by Day Software (http://www.day.com/).
+
+This product includes software developed at
+The Apache Software Foundation (http://www.apache.org/).
diff --git a/README.txt b/README.txt
new file mode 100644
index 0000000..5af5709
--- /dev/null
+++ b/README.txt
@@ -0,0 +1,38 @@
+Apache Sling - Scripting - W3C XML Processing Support
+
+Support for pipelines based on W3C XML Processing.
+(See http://www.w3.org/TR/xproc/)
+
+Disclaimer
+==========
+Apache Sling is an effort undergoing incubation at The Apache Software Foundation (ASF),
+sponsored by the Apache Jackrabbit PMC. Incubation is required of all newly accepted
+projects until a further review indicates that the infrastructure, communications,
+and decision making process have stabilized in a manner consistent with other
+successful ASF projects. While incubation status is not necessarily a reflection of
+the completeness or stability of the code, it does indicate that the project has yet
+to be fully endorsed by the ASF.
+
+Getting Started
+===============
+
+This component uses a Maven 2 (http://maven.apache.org/) build
+environment. It requires a Java 5 JDK (or higher) and Maven (http://maven.apache.org/)
+2.0.7 or later. We recommend to use the latest Maven version.
+
+If you have Maven 2 installed, you can compile and
+package the jar using the following command:
+
+    mvn package
+
+See the Maven 2 documentation for other build features.
+
+The latest source code for this component is available in the
+Subversion (http://subversion.tigris.org/) source repository of
+the Apache Software Foundation. If you have Subversion installed,
+you can checkout the latest source using the following command:
+
+    svn checkout http://svn.apache.org/repos/asf/incubator/sling/trunk/scripting/python
+
+See the Subversion documentation for other source control features.
+
diff --git a/pom.xml b/pom.xml
new file mode 100644
index 0000000..64806da
--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="ISO-8859-1"?>
+<!--
+    Licensed to the Apache Software Foundation (ASF) under one
+    or more contributor license agreements.  See the NOTICE file
+    distributed with this work for additional information
+    regarding copyright ownership.  The ASF licenses this file
+    to you under the Apache License, Version 2.0 (the
+    "License"); you may not use this file except in compliance
+    with the License.  You may obtain a copy of the License at
+    
+    http://www.apache.org/licenses/LICENSE-2.0
+    
+    Unless required by applicable law or agreed to in writing,
+    software distributed under the License is distributed on an
+    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+    KIND, either express or implied.  See the License for the
+    specific language governing permissions and limitations
+    under the License.
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.apache.sling</groupId>
+        <artifactId>sling</artifactId>
+        <version>5-incubator</version>
+        <relativePath>../../../parent/pom.xml</relativePath>
+    </parent>
+
+    <artifactId>org.apache.sling.scripting.xproc</artifactId>
+    <version>2.0.0-incubator-SNAPSHOT</version>
+    <packaging>bundle</packaging>
+
+    <name>Apache Sling Scripting W3C XML Processing Support</name>
+    <description>
+    	Support for W3C XML Processing scripting (http://www.w3.org/XML/Processing/)
+    </description>
+
+    <scm>
+        <connection>scm:svn:https://svn.apache.org/repos/asf/incubator/sling/trunk/contrib/scripting/xproc</connection>
+        <developerConnection>scm:svn:https://svn.apache.org/repos/asf/incubator/sling/trunk/contrib/scripting/xproc</developerConnection>
+        <url>http://svn.apache.org/viewvc/incubator/sling/trunk/contrib/scripting/xproc</url>
+    </scm>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.felix</groupId>
+                <artifactId>maven-scr-plugin</artifactId>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.felix</groupId>
+                <artifactId>maven-bundle-plugin</artifactId>
+                <version>1.4.3</version>
+                <extensions>true</extensions>
+                <configuration>
+                    <instructions>
+                        <Private-Package>
+                            org.apache.sling.scripting.xproc.*
+                        </Private-Package>
+                        <Embed-Dependency>cocoon-pipeline;inline=true</Embed-Dependency>
+                        <ScriptEngine-Name>${pom.name}</ScriptEngine-Name>
+                        <ScriptEngine-Version>${pom.version}</ScriptEngine-Version>
+                    </instructions>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.sling</groupId>
+            <artifactId>org.apache.sling.api</artifactId>
+            <version>2.0.2-incubator</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.sling</groupId>
+            <artifactId>org.apache.sling.scripting.api</artifactId>
+            <version>2.0.2-incubator</version>
+        </dependency>
+         <dependency>
+            <groupId>org.apache.sling</groupId>
+            <artifactId>org.apache.sling.commons.mime</artifactId>
+            <version>2.0.2-incubator</version>
+        </dependency>
+        <dependency>
+            <groupId>javax.servlet</groupId>
+            <artifactId>servlet-api</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>javax.jcr</groupId>
+            <artifactId>jcr</artifactId>
+        </dependency>
+	     <dependency>
+	        <groupId>org.apache.cocoon.pipeline</groupId>
+	        <artifactId>cocoon-pipeline</artifactId>
+	        <version>3.0.0-alpha-1</version>
+	     </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+        </dependency>
+        
+        <!-- Testing -->
+        <dependency>
+            <groupId>org.apache.sling</groupId>
+            <artifactId>org.apache.sling.commons.testing</artifactId>
+            <version>2.0.4-incubator</version>
+            <scope>test</scope>
+        </dependency>
+		<dependency>
+			<groupId>xmlunit</groupId>
+			<artifactId>xmlunit</artifactId>
+			<version>1.2</version>
+			<scope>test</scope>
+		</dependency>
+		
+    </dependencies>
+    
+</project>
diff --git a/src/main/java/org/apache/sling/scripting/xproc/XProcScriptEngine.java b/src/main/java/org/apache/sling/scripting/xproc/XProcScriptEngine.java
new file mode 100644
index 0000000..64d4f31
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/XProcScriptEngine.java
@@ -0,0 +1,75 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc;
+
+import java.io.Reader;
+
+import javax.script.Bindings;
+import javax.script.ScriptContext;
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineFactory;
+import javax.script.ScriptException;
+
+import org.apache.sling.api.scripting.SlingBindings;
+import org.apache.sling.api.scripting.SlingScriptHelper;
+import org.apache.sling.scripting.api.AbstractSlingScriptEngine;
+import org.apache.sling.scripting.xproc.xpl.XplBuilder;
+import org.apache.sling.scripting.xproc.xpl.api.Pipeline;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * A {@link ScriptEngine} that uses XPL definition files
+ * in order to execute pipelines over Sling resources.
+ * 
+ * @see http://www.w3.org/TR/xproc/
+ */
+public class XProcScriptEngine extends AbstractSlingScriptEngine {
+	
+	private static final Logger log = LoggerFactory.getLogger(XProcScriptEngine.class);
+	
+	protected XProcScriptEngine(ScriptEngineFactory factory) {
+		super(factory);
+	}
+
+	public Object eval(Reader reader, ScriptContext scriptContext) throws ScriptException {
+		Bindings bindings = scriptContext.getBindings(ScriptContext.ENGINE_SCOPE);
+		SlingScriptHelper helper = (SlingScriptHelper) bindings.get(SlingBindings.SLING);
+		if (helper == null) {
+			throw new ScriptException("SlingScriptHelper missing from bindings");
+		}
+		
+		String scriptName = helper.getScript().getScriptResource().getPath();
+		
+		try {
+			XplBuilder xplBuilder = new XplBuilder();
+			Pipeline xpl = (Pipeline) xplBuilder.build(reader);
+			xpl.getEnv().setSling(helper);
+			xpl.eval();
+		} catch (Throwable t) {
+			log.error("Failure running XProc script.", t);
+      final ScriptException se = new ScriptException("Failure running XProc script " + scriptName);
+      se.initCause(t);
+      throw se;
+		}
+		
+		return null;
+	}
+
+}
\ No newline at end of file
diff --git a/src/main/java/org/apache/sling/scripting/xproc/XProcScriptEngineFactory.java b/src/main/java/org/apache/sling/scripting/xproc/XProcScriptEngineFactory.java
new file mode 100644
index 0000000..fd49b82
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/XProcScriptEngineFactory.java
@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc;
+
+import javax.script.ScriptEngine;
+
+import org.apache.sling.scripting.api.AbstractScriptEngineFactory;
+
+public class XProcScriptEngineFactory extends AbstractScriptEngineFactory {
+	
+    public final static String XPROC_SCRIPT_EXTENSION = "xpl";
+
+    public final static String XPROC_MIME_TYPE = "application/xml";
+
+    public final static String SHORT_NAME = "XProc";
+
+    private static final String XPROC_NAME = "XMLProc";
+
+    private static final String DEFAULT_XPROC_VERSION = "1.0";
+	
+	public XProcScriptEngineFactory() {
+		setExtensions(XPROC_SCRIPT_EXTENSION);
+		setMimeTypes(XPROC_MIME_TYPE);
+		setNames(SHORT_NAME, "xml processing", "xml pipeline processor");
+	}
+	
+	public ScriptEngine getScriptEngine() {
+		return new XProcScriptEngine(this);
+	}
+	
+	public String getLanguageName() {
+		return XPROC_NAME;
+	}
+
+	public String getLanguageVersion() {
+		return DEFAULT_XPROC_VERSION;
+	}
+
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/cocoon/generator/SlingGenerator.java b/src/main/java/org/apache/sling/scripting/xproc/cocoon/generator/SlingGenerator.java
new file mode 100644
index 0000000..7cfbe86
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/cocoon/generator/SlingGenerator.java
@@ -0,0 +1,106 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.cocoon.generator;
+
+import java.io.ByteArrayInputStream;
+import java.io.InputStream;
+
+import javax.jcr.Session;
+import javax.servlet.RequestDispatcher;
+import javax.servlet.ServletResponse;
+
+import org.apache.cocoon.pipeline.component.sax.AbstractGenerator;
+import org.apache.cocoon.pipeline.util.XMLUtils;
+import org.apache.sling.api.SlingHttpServletRequest;
+import org.apache.sling.api.SlingHttpServletResponse;
+import org.apache.sling.api.resource.Resource;
+import org.apache.sling.api.scripting.SlingScriptHelper;
+import org.apache.sling.commons.mime.MimeTypeService;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * A Cocoon Generator that uses internal Sling
+ * request processing in order to get the initial
+ * XML for the pipeline.
+ * 
+ * In order of preference the generator tries
+ * to resolve the current resource as:
+ * 
+ * 	+-- a XML file (adapts to {@link InputStream})
+ * 	+-- dynamically generated XML (using inclusion procedure)
+ *  +-- the underlying nodeĀ“s export document view
+ */
+public class SlingGenerator extends AbstractGenerator {
+	
+	private final Logger log = LoggerFactory.getLogger(getClass());
+	
+	private static final String XML_MIME_TYPE = "text/xml";
+	
+	private SlingHttpServletRequest request;
+	private SlingHttpServletResponse response;
+	private MimeTypeService mimeTypeService; 
+	
+	public SlingGenerator(SlingScriptHelper sling) {
+		this.request = sling.getRequest();
+		this.response = sling.getResponse();
+		this.mimeTypeService = sling.getService(MimeTypeService.class);
+	}
+	
+	public void execute() {
+		try {
+			Session session;
+			InputStream srcIs = genXmlSource();			
+			if (srcIs != null)
+				XMLUtils.toSax(srcIs, this.getXMLConsumer());
+			else if ((session = request.getResource().adaptTo(Session.class)) != null) {
+				session.exportDocumentView(request.getResource().getPath(), this.getXMLConsumer(), true, true);
+			} else
+				throw new IllegalArgumentException("cannot generate xml source for " + request.getResource().getPath());
+			
+		} catch (Throwable t) {
+			log.error("SlingGenerator: cannot generate xml source for " 
+					+ request.getResource().getPath(), t);
+		}
+	}
+	
+	private InputStream genXmlSource() throws Exception {
+	
+		String xmlPath = request.getResource().getPath() + "." +  mimeTypeService.getExtension(XML_MIME_TYPE);
+		
+		// The source is a xml file
+		Resource xmlResource = this.request.getResourceResolver().resolve(xmlPath);
+		InputStream xmlSourceFile = xmlResource.adaptTo(InputStream.class);
+		if (xmlSourceFile != null) 
+			return xmlSourceFile;
+		
+		// The source is dynamically generated 
+		RequestDispatcher dispatcher = request.getRequestDispatcher(xmlPath);
+		SlingGeneratorServletOutputStream output = new SlingGeneratorServletOutputStream();
+		ServletResponse newResponse = new SlingGeneratorServletResponse(response, output);
+		dispatcher.include(request, newResponse);
+		byte[] bytes = output.toByteArray();
+		if (bytes.length > 0)
+			return new ByteArrayInputStream(bytes);
+		
+		return null;
+		
+	}
+
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/cocoon/generator/SlingGeneratorServletOutputStream.java b/src/main/java/org/apache/sling/scripting/xproc/cocoon/generator/SlingGeneratorServletOutputStream.java
new file mode 100644
index 0000000..4b08602
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/cocoon/generator/SlingGeneratorServletOutputStream.java
@@ -0,0 +1,54 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.cocoon.generator;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.OutputStreamWriter;
+import java.io.PrintWriter;
+import java.io.UnsupportedEncodingException;
+
+import javax.servlet.ServletOutputStream;
+
+public class SlingGeneratorServletOutputStream extends ServletOutputStream {
+	
+	private final ByteArrayOutputStream output;
+	private final PrintWriter writer;
+	
+	public SlingGeneratorServletOutputStream() throws UnsupportedEncodingException {
+		this.output = new ByteArrayOutputStream();
+		this.writer = new PrintWriter(new OutputStreamWriter(output, "UTF-8"));
+	}
+	
+	final PrintWriter getWriter() {
+		return this.writer;
+	}
+	
+	@Override
+	public void write(int b) throws IOException {
+		this.output.write(b);
+	}
+	
+	final byte[] toByteArray() {
+		this.writer.flush();
+		byte[] bytes = output.toByteArray();
+		return bytes;
+	}
+	
+}
\ No newline at end of file
diff --git a/src/main/java/org/apache/sling/scripting/xproc/cocoon/generator/SlingGeneratorServletResponse.java b/src/main/java/org/apache/sling/scripting/xproc/cocoon/generator/SlingGeneratorServletResponse.java
new file mode 100644
index 0000000..112bd73
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/cocoon/generator/SlingGeneratorServletResponse.java
@@ -0,0 +1,66 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.cocoon.generator;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+
+import javax.servlet.ServletOutputStream;
+
+import org.apache.sling.api.SlingHttpServletResponse;
+import org.apache.sling.api.wrappers.SlingHttpServletResponseWrapper;
+
+public class SlingGeneratorServletResponse extends SlingHttpServletResponseWrapper
+										   implements SlingHttpServletResponse {
+
+	private SlingGeneratorServletOutputStream output;
+
+	private boolean hasWriter = false;
+	private boolean hasOutputStream  = false;
+
+	public SlingGeneratorServletResponse(SlingHttpServletResponse wrappedResponse,
+			SlingGeneratorServletOutputStream output) {
+		super(wrappedResponse);
+		this.output = output;
+	}
+
+	@Override
+	public PrintWriter getWriter() throws IOException {
+		if (this.hasOutputStream) {
+			throw new IllegalStateException("getOutputStream was already called.");
+		}
+		this.hasWriter = true;
+		return this.output.getWriter();
+	}
+
+	@Override
+	public ServletOutputStream getOutputStream() throws IOException {
+		if (this.hasWriter) {
+			throw new IllegalStateException("getWriter was already called.");
+		}
+		this.hasOutputStream = true;
+		return this.output;
+	}
+
+	@Override
+	public int getBufferSize() {
+		return 1024;
+	}
+
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/cocoon/transform/SlingTransformer.java b/src/main/java/org/apache/sling/scripting/xproc/cocoon/transform/SlingTransformer.java
new file mode 100644
index 0000000..cc8b5e8
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/cocoon/transform/SlingTransformer.java
@@ -0,0 +1,160 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.cocoon.transform;
+
+import java.io.InputStream;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.sax.SAXResult;
+import javax.xml.transform.sax.SAXTransformerFactory;
+import javax.xml.transform.sax.TemplatesHandler;
+import javax.xml.transform.sax.TransformerHandler;
+
+import org.apache.cocoon.pipeline.component.sax.AbstractTransformer;
+import org.apache.cocoon.pipeline.component.sax.XMLConsumer;
+import org.apache.cocoon.pipeline.component.sax.XMLConsumerAdapter;
+import org.apache.sling.api.SlingHttpServletRequest;
+import org.apache.sling.api.resource.Resource;
+import org.apache.sling.api.scripting.SlingScriptHelper;
+import org.xml.sax.InputSource;
+import org.xml.sax.XMLReader;
+import org.xml.sax.helpers.XMLReaderFactory;
+
+/**
+ * A Cocoon transformer that executes XSLT
+ * transformations. The templates are Sling 
+ * resources supporting to be adapted to 
+ * {@link InputStream}.
+ */
+public class SlingTransformer extends AbstractTransformer {
+	
+	private SlingHttpServletRequest request;
+	private Map<String, Object> parameters;
+    private String srcAbsPath;
+
+    public SlingTransformer() {
+        super();
+    }
+
+    public SlingTransformer(SlingScriptHelper sling, String srcAbsPath) {
+        this(sling, srcAbsPath, null);
+    }
+
+    public SlingTransformer(SlingScriptHelper sling, String srcAbsPath, Map<String, Object> parameters) {
+        super();
+        if (srcAbsPath == null) {
+            throw new IllegalArgumentException("The parameter 'source' mustn't be null.");
+        }
+        
+        this.request = sling.getRequest();
+        this.parameters = parameters;
+        this.srcAbsPath = srcAbsPath;
+    }
+
+    /**
+     * Test if the name is a valid parameter name for XSLT
+     */
+    private static boolean isValidXSLTParameterName(String name) {
+        return name.matches("[a-zA-Z_][\\w\\-\\.]*");
+    }
+
+    @Override
+    public void setConfiguration(Map<String, ? extends Object> configuration) {
+        this.parameters = new HashMap<String, Object>(configuration);
+    }
+
+    @Override
+    protected void setXMLConsumer(XMLConsumer consumer) {
+        TransformerHandler transformerHandler;
+        try {
+            transformerHandler = this.createTransformerHandler();
+        } catch (Exception ex) {
+            throw new RuntimeException("Could not initialize transformer handler.", ex);
+        }
+
+        final Map<String, Object> map = this.getLogicSheetParameters();
+        if (map != null) {
+            final Transformer transformer = transformerHandler.getTransformer();
+
+            for (Entry<String, Object> entry : map.entrySet()) {
+                transformer.setParameter(entry.getKey(), entry.getValue());
+            }
+        }
+
+        final SAXResult result = new SAXResult();
+        result.setHandler(consumer);
+        // According to TrAX specs, all TransformerHandlers are LexicalHandlers
+        result.setLexicalHandler(consumer);
+        transformerHandler.setResult(result);
+
+        super.setXMLConsumer(new XMLConsumerAdapter(transformerHandler, transformerHandler));
+    }
+
+    private TransformerHandler createTransformerHandler() throws Exception {
+        SAXTransformerFactory transformerFactory = (SAXTransformerFactory) TransformerFactory.newInstance();
+        TemplatesHandler templatesHandler = transformerFactory.newTemplatesHandler();
+
+        XMLReader xmlReader = XMLReaderFactory.createXMLReader();
+        xmlReader.setContentHandler(templatesHandler);
+        InputSource inputSource = new InputSource(getXsltSource());
+        xmlReader.parse(inputSource);
+
+        // Create transformer handler
+        final TransformerHandler handler = transformerFactory.newTransformerHandler(templatesHandler.getTemplates());
+
+        return handler;
+    }
+
+    private Map<String, Object> getLogicSheetParameters() {
+        if (this.parameters == null) {
+            return null;
+        }
+
+        Map<String, Object> result = new HashMap<String, Object>();
+
+        for (Entry<String, Object> entry : this.parameters.entrySet()) {
+            String name = entry.getKey();
+
+            if (isValidXSLTParameterName(name)) {
+                result.put(name, entry.getValue());
+            }
+        }
+
+        return result;
+    }
+	
+    /**
+     * Get the XSLT source. For the time being, the 
+     * path must be absolute.
+     */
+    private InputStream getXsltSource() throws Exception {
+		// The source is a xml file
+		Resource xmlResource = this.request.getResourceResolver().resolve(srcAbsPath);
+		InputStream xmlSourceFile = xmlResource.adaptTo(InputStream.class);
+		if (xmlSourceFile != null) 
+			return xmlSourceFile;
+		return null;
+			
+	}
+    
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/XplBuilder.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/XplBuilder.java
new file mode 100644
index 0000000..5bb2c8f
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/XplBuilder.java
@@ -0,0 +1,111 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl;
+
+import java.io.Reader;
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.xml.namespace.QName;
+
+import org.apache.sling.scripting.xproc.xpl.api.Step;
+import org.apache.sling.scripting.xproc.xpl.api.XplElement;
+import org.apache.sling.scripting.xproc.xpl.api.XplElementFactory;
+import org.apache.sling.scripting.xproc.xpl.impl.XplElementFactoryImpl;
+import org.xml.sax.Attributes;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+import org.xml.sax.SAXParseException;
+import org.xml.sax.XMLReader;
+import org.xml.sax.helpers.DefaultHandler;
+import org.xml.sax.helpers.XMLReaderFactory;
+
+/**
+ * Builds a W3C XML Processing pipeline
+ * from a XPL file.
+ */
+public class XplBuilder {
+	
+	private XplElementFactory xplElementFactory;
+	
+	public XplBuilder() {
+		this.xplElementFactory = new XplElementFactoryImpl();
+	}
+	
+	public Step build(Reader xplReader) throws Exception {
+		XMLReader xMLReader =  XMLReaderFactory.createXMLReader();
+		XplHandler xplHandler = new XplHandler();
+		xMLReader.setContentHandler(xplHandler);
+		InputSource inputSource = new InputSource(xplReader);
+		xMLReader.parse(inputSource);
+		return xplHandler.getRootStep();
+	}
+	
+	protected XplElement createXplElement(String localName, Map<String, String> attributes) {
+        return XplBuilder.this.xplElementFactory.createXplElement(new QName(XplConstants.NS_XPROC, localName), attributes);
+    }
+	
+	class XplHandler extends DefaultHandler {
+		
+		private XplElement currentXplElement;
+		private Step rootStep;
+		
+		@Override
+		public void endElement(String uri, String localName, String name) throws SAXException {
+			if (this.currentXplElement == null) {
+                throw new IllegalStateException("Received closing '" + localName + "' but there was no element to close.");
+            }
+			
+			this.currentXplElement = this.currentXplElement.getParent();
+		}
+		
+		@Override
+        public void error(SAXParseException e) throws SAXException {
+            throw e;
+        }
+		
+		public Step getRootStep() {
+			return this.rootStep;
+		}
+		
+		@Override
+		public void startElement(String uri, String localName, String name, Attributes attributes) throws SAXException {
+			if (this.currentXplElement == null) {
+				if (XplConstants.QNAME_PIPELINE.getLocalPart().equals(localName)) {
+					this.rootStep = (Step) XplBuilder.this.createXplElement(localName, null);
+					this.currentXplElement = this.rootStep;
+					return;
+				}
+				throw new IllegalStateException("Expected 'pipeline' as first element, but received '" + localName + "'");
+			}
+			
+			Map<String, String> atts = new HashMap<String, String>();
+            int length = attributes.getLength();
+            for (int i = 0; i < length; i++) {
+            	atts.put(attributes.getQName(i), attributes.getValue(i));
+            }
+			
+			XplElement xplElement = createXplElement(localName, atts);
+			this.currentXplElement.addChild(xplElement);
+			this.currentXplElement = xplElement;
+		}
+		
+	}
+	
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/XplConstants.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/XplConstants.java
new file mode 100644
index 0000000..6208afe
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/XplConstants.java
@@ -0,0 +1,32 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl;
+
+import javax.xml.namespace.QName;
+
+public class XplConstants {
+	
+	public static final String NS_XPROC = "http://www.w3.org/ns/xproc";
+	
+	public static final QName QNAME_PIPELINE = new QName(NS_XPROC, "pipeline"); 
+	public static final QName QNAME_XSLT = new QName(NS_XPROC, "xslt");
+	public static final QName QNAME_INPUT = new QName(NS_XPROC, "input");
+	public static final QName QNAME_DOCUMENT = new QName(NS_XPROC, "document");
+	
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/api/AtomicStep.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/AtomicStep.java
new file mode 100644
index 0000000..ee525f1
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/AtomicStep.java
@@ -0,0 +1,23 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.api;
+
+public interface AtomicStep extends Step {
+
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/api/CompoundStep.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/CompoundStep.java
new file mode 100644
index 0000000..ee17637
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/CompoundStep.java
@@ -0,0 +1,29 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.api;
+
+import java.util.Vector;
+
+public interface CompoundStep extends Step {
+
+	Vector<Step> getSubpipeline();
+
+	void setSubpipeline(Vector<Step> subpipeline);
+	
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/api/Document.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/Document.java
new file mode 100644
index 0000000..3a847c8
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/Document.java
@@ -0,0 +1,27 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.api;
+
+public interface Document extends XplElement {
+	
+	String getHref();
+
+	void setHref(String href);
+	
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/api/Environment.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/Environment.java
new file mode 100644
index 0000000..de0dfc5
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/Environment.java
@@ -0,0 +1,34 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.api;
+
+import org.apache.cocoon.pipeline.Pipeline;
+import org.apache.sling.api.scripting.SlingScriptHelper;
+
+public interface Environment {
+	
+	SlingScriptHelper getSling();
+	
+	void setSling(SlingScriptHelper sling);
+	
+	Pipeline getCcPipeline();
+	
+	void setCcPipeline(Pipeline ccPipeline);
+	
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/api/Input.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/Input.java
new file mode 100644
index 0000000..23287f2
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/Input.java
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.api;
+
+public interface Input extends XplElement {
+	
+	String getPort();
+
+	void setPort(String port);
+	
+	Document getDocument();
+
+	void setDocument(Document document);
+	
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/api/MultiContainerStep.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/MultiContainerStep.java
new file mode 100644
index 0000000..0b4bab2
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/MultiContainerStep.java
@@ -0,0 +1,23 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.api;
+
+public interface MultiContainerStep extends Step {
+
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/api/Pipeline.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/Pipeline.java
new file mode 100644
index 0000000..a84cc54
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/Pipeline.java
@@ -0,0 +1,24 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.api;
+
+public interface Pipeline extends CompoundStep {
+
+	
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/api/Step.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/Step.java
new file mode 100644
index 0000000..eb4728f
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/Step.java
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.api;
+
+public interface Step extends XplElement {
+	
+	void eval() throws Exception;
+	
+	Step getContainer();
+
+	void setContainer(Step container);
+	
+	Environment getEnv();
+
+	void setEnv(Environment env);
+	
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/api/XplElement.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/XplElement.java
new file mode 100644
index 0000000..420b62d
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/XplElement.java
@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.api;
+
+import java.util.LinkedList;
+import java.util.Map;
+
+import javax.xml.namespace.QName;
+
+public interface XplElement {
+	
+	QName getQName();
+	
+	XplElement getParent();
+	
+	void setAttributes(Map<String, String> attributes);
+	
+	void setParent(XplElement parent);
+	
+	LinkedList<XplElement> getChildren();
+	
+	void addChild(XplElement child);
+	
+	int getDepth();
+
+	void setDepth(int depth);
+	
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/api/XplElementFactory.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/XplElementFactory.java
new file mode 100644
index 0000000..a884008
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/XplElementFactory.java
@@ -0,0 +1,29 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.api;
+
+import java.util.Map;
+
+import javax.xml.namespace.QName;
+
+public interface XplElementFactory {
+	
+	XplElement createXplElement(QName type, Map<String, String> parameters);
+	
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/api/Xslt.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/Xslt.java
new file mode 100644
index 0000000..6d3a708
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/api/Xslt.java
@@ -0,0 +1,27 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.api;
+
+public interface Xslt extends AtomicStep {
+	
+	Input getStylesheet();
+
+	void setStylesheet(Input stylesheet);
+	
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/AbstractCompoundStepImpl.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/AbstractCompoundStepImpl.java
new file mode 100644
index 0000000..99ca489
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/AbstractCompoundStepImpl.java
@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.impl;
+
+import java.util.Vector;
+
+import org.apache.sling.scripting.xproc.xpl.api.CompoundStep;
+import org.apache.sling.scripting.xproc.xpl.api.Step;
+import org.apache.sling.scripting.xproc.xpl.api.XplElement;
+
+public abstract class AbstractCompoundStepImpl extends AbstractStepImpl implements CompoundStep {
+
+	private Vector<Step> subpipeline = new Vector<Step>();
+	
+	@Override
+	public void eval() throws Exception {
+		for (Step step : subpipeline) {
+			step.eval();
+		}
+	}
+	
+	@Override
+	public void addChild(XplElement child) {
+		super.addChild(child);
+		if (child instanceof Step) {
+			Step stepChild = (Step) child;
+			stepChild.setEnv(this.getEnv());
+			subpipeline.add(stepChild);
+		}
+	}
+	
+	public Vector<Step> getSubpipeline() {
+		return subpipeline;
+	}
+
+	public void setSubpipeline(Vector<Step> subpipeline) {
+		this.subpipeline = subpipeline;
+	}
+	
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/AbstractStepImpl.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/AbstractStepImpl.java
new file mode 100644
index 0000000..2577480
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/AbstractStepImpl.java
@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.impl;
+
+import org.apache.sling.scripting.xproc.xpl.api.Environment;
+import org.apache.sling.scripting.xproc.xpl.api.Step;
+
+public abstract class AbstractStepImpl extends AbstractXplElementImpl implements Step {
+	
+	private Step container;
+	private Environment env;
+	
+	public abstract void eval() throws Exception;
+	
+	public AbstractStepImpl() {
+		this.env = new EnvironmentImpl();
+	}
+	
+	public AbstractStepImpl(Environment env) {
+		this.env = env;
+	}
+	
+	public Step getContainer() {
+		return container;
+	}
+
+	public void setContainer(Step container) {
+		this.container = container;
+	}
+	
+	public Environment getEnv() {
+		return env;
+	}
+
+	public void setEnv(Environment env) {
+		this.env = env;
+	}
+	
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/AbstractXplElementImpl.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/AbstractXplElementImpl.java
new file mode 100644
index 0000000..bd2d65f
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/AbstractXplElementImpl.java
@@ -0,0 +1,219 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.impl;
+
+import java.lang.reflect.Field;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import javax.xml.namespace.QName;
+
+import org.apache.sling.api.scripting.SlingScriptHelper;
+import org.apache.sling.scripting.xproc.xpl.api.XplElement;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public abstract class AbstractXplElementImpl implements XplElement {
+	
+	protected final Logger log = LoggerFactory.getLogger(this.getClass());
+	
+	private SlingScriptHelper sling;
+	private final Map<String, String> attributes = new HashMap<String, String>();	
+	private XplElement parent; 
+	private final LinkedList<XplElement> children = new LinkedList<XplElement>();
+	private int depth = 0;
+
+	public LinkedList<XplElement> getChildren() {
+		return children;
+	}
+
+	public void addChild(XplElement child) {
+		
+		if (child == null) {
+            String msg = "Element of class " + this.getClass().getName() + " received null child.";
+            this.log.error(msg);
+            throw new IllegalArgumentException(msg);
+        }
+		
+		Field childField = this.getChildField(child);
+        if (childField != null) {
+            childField.setAccessible(true);
+            try {
+                childField.set(this, child);
+            } catch (IllegalArgumentException e) {
+                this.log.error("Failed to set child field for child class '" + child.getClass().getName(), e);
+            } catch (IllegalAccessException e) {
+                this.log.error("Failed to set child field for child class '" + child.getClass().getName(), e);
+            }
+        }
+        child.setDepth(this.getDepth() + 1);
+        this.children.add(child);
+		child.setParent(this);
+		
+	}
+	
+	public void setAttributes(Map<String, String> attributes) {
+		if (attributes == null || attributes.isEmpty()) {
+            // nothing to do
+            return;
+        }
+
+        // check for special attribute fields
+        Map<String, Field> attributeFields = this.getAttributeFields();
+        for (Entry<String, String> entry : attributes.entrySet()) {
+            String key = entry.getKey();
+            String value = entry.getValue();
+
+            Field attributeField = attributeFields.get(key);
+            if (attributeField != null) {
+            	attributeField.setAccessible(true);
+                try {
+                	attributeField.set(this, value);
+                } catch (IllegalArgumentException e) {
+                    String message = "Failed to set attribute field " + key;
+                    this.log.error(message, e);
+                    throw new RuntimeException(message, e);
+                } catch (IllegalAccessException e) {
+                    String message = "Failed to set attribute field " + key;
+                    this.log.error(message, e);
+                    throw new RuntimeException(message, e);
+                }
+             }
+
+            // default attribute processing
+            this.processAttribute(key, value);
+        }
+	}
+	
+	public SlingScriptHelper getSling() {
+		return sling;
+	}
+	
+	public abstract QName getQName();
+	
+	public XplElement getParent() {
+		return parent;
+	}
+	
+	public void setParent(XplElement parent) {
+		this.parent = parent;
+	}
+	
+	public int getDepth() {
+		return depth;
+	}
+
+	public void setDepth(int depth) {
+		this.depth = depth;
+	}
+	
+	@Override
+	public String toString() {
+		StringBuffer sbXplElement = new StringBuffer();
+		addTabs(sbXplElement, getDepth());
+		sbXplElement.append("<");
+		sbXplElement.append("p:" + this.getQName().getLocalPart());
+		if (getDepth() == 0) {
+			sbXplElement.append(" xmlns:p=\"http://www.w3.org/ns/xproc\"");
+		}
+		for (String attribute : this.attributes.keySet()) {
+			sbXplElement.append(" ");
+			sbXplElement.append(attribute + "=" + "\"" + this.attributes.get(attribute) + "\"");
+		}
+		if (getChildren().size() == 0) {
+			sbXplElement.append(" />");
+			return sbXplElement.toString();
+		}
+		sbXplElement.append(">");
+		for (XplElement child : this.getChildren()) {
+			sbXplElement.append("\r\n");
+			sbXplElement.append(child.toString());
+		}
+		sbXplElement.append("\r\n");
+		addTabs(sbXplElement, getDepth());
+		sbXplElement.append("</");
+		sbXplElement.append("p:" + this.getQName().getLocalPart());
+		sbXplElement.append(">");
+		
+		return sbXplElement.toString();
+	}
+	
+	private void addTabs(StringBuffer sb, int num) {
+		for (int i = 0; i < num; i++) 
+			sb.append("\t");
+	}
+	
+	protected void processAttribute(String key, String value) {
+        this.attributes.put(key, value);
+    }
+	
+	private Field getChildField(XplElement child) {
+        Class<?> currentClass = this.getClass();
+
+        Field[] declaredFields = currentClass.getDeclaredFields();
+        for (Field declaredField : declaredFields) {
+            if (declaredField.getType().isAssignableFrom(child.getClass())) {
+                return declaredField;
+            }
+        }
+
+        return null;
+    }
+	
+    private Map<String, Field> getAttributeFields() {
+        Map<String, Field> attributeFields = new HashMap<String, Field>();
+
+        Class<?> currentClass = this.getClass();
+        while (currentClass != null) {
+            Field[] declaredFields = currentClass.getDeclaredFields();
+            for (Field declaredField : declaredFields) {              
+                String fieldName = this.convertCamelCase(declaredField.getName());
+                attributeFields.put(fieldName, declaredField);
+            }
+
+            currentClass = currentClass.getSuperclass();
+        }
+
+        return attributeFields;
+    }
+
+    private String convertCamelCase(String name) {
+        Pattern camelCasePattern = Pattern.compile("(.)([A-Z])");
+        Matcher matcher = camelCasePattern.matcher(name);
+
+        int lastMatch = 0;
+        StringBuilder result = new StringBuilder();
+        while (matcher.find()) {
+            result.append(name.substring(lastMatch, matcher.start()));
+            result.append(matcher.group(1));
+            result.append("-");
+            result.append(matcher.group(2).toLowerCase());
+            lastMatch = matcher.end();
+        }
+
+        result.append(name.substring(lastMatch, name.length()));
+
+        return result.toString();
+    }
+
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/DocumentImpl.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/DocumentImpl.java
new file mode 100644
index 0000000..93a52f9
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/DocumentImpl.java
@@ -0,0 +1,43 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.impl;
+
+import javax.xml.namespace.QName;
+
+import org.apache.sling.scripting.xproc.xpl.XplConstants;
+import org.apache.sling.scripting.xproc.xpl.api.Document;
+
+public class DocumentImpl extends AbstractXplElementImpl implements Document {
+
+	private String href;
+	
+	public String getHref() {
+		return href;
+	}
+
+	public void setHref(String href) {
+		this.href = href;
+	}
+	
+	@Override
+	public QName getQName() {
+		return XplConstants.QNAME_DOCUMENT;
+	}
+	
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/EnvironmentImpl.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/EnvironmentImpl.java
new file mode 100644
index 0000000..48b8eb3
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/EnvironmentImpl.java
@@ -0,0 +1,46 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.impl;
+
+import org.apache.cocoon.pipeline.Pipeline;
+import org.apache.sling.api.scripting.SlingScriptHelper;
+import org.apache.sling.scripting.xproc.xpl.api.Environment;
+
+public class EnvironmentImpl implements Environment {
+	
+	private SlingScriptHelper sling;
+	private Pipeline ccPipeline;
+	
+	public SlingScriptHelper getSling() {
+		return sling;
+	}
+	
+	public void setSling(SlingScriptHelper sling) {
+		this.sling = sling;
+	}
+	
+	public Pipeline getCcPipeline() {
+		return ccPipeline;
+	}
+	
+	public void setCcPipeline(Pipeline ccPipeline) {
+		this.ccPipeline = ccPipeline;
+	}
+	
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/InputImpl.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/InputImpl.java
new file mode 100644
index 0000000..6678625
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/InputImpl.java
@@ -0,0 +1,53 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.impl;
+
+import javax.xml.namespace.QName;
+
+import org.apache.sling.scripting.xproc.xpl.XplConstants;
+import org.apache.sling.scripting.xproc.xpl.api.Document;
+import org.apache.sling.scripting.xproc.xpl.api.Input;
+
+public class InputImpl extends AbstractXplElementImpl implements Input {
+
+	private String port;
+	private Document document;
+	
+	public String getPort() {
+		return port;
+	}
+
+	public void setPort(String port) {
+		this.port = port;
+	}
+	
+	public Document getDocument() {
+		return document;
+	}
+
+	public void setDocument(Document document) {
+		this.document = document;
+	}
+	
+	@Override
+	public QName getQName() {
+		return XplConstants.QNAME_INPUT;
+	}
+	
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/OutputStreamWrapper.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/OutputStreamWrapper.java
new file mode 100644
index 0000000..c0525ba
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/OutputStreamWrapper.java
@@ -0,0 +1,57 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.impl;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+/** OutputStream that wraps another one using a method
+ *  that's only called if the wrapped stream is actually
+ *  used.
+ */
+abstract class OutputStreamWrapper extends OutputStream {
+
+  protected abstract OutputStream getWrappedStream() throws IOException;
+  
+  @Override
+  public void close() throws IOException {
+    getWrappedStream().close();
+  }
+
+  @Override
+  public void flush() throws IOException {
+    getWrappedStream().flush();
+  }
+
+  @Override
+  public void write(byte[] arg0, int arg1, int arg2) throws IOException {
+    getWrappedStream().write(arg0, arg1, arg2);
+  }
+
+  @Override
+  public void write(byte[] arg0) throws IOException {
+    getWrappedStream().write(arg0);
+  }
+
+  @Override
+  public void write(int arg0) throws IOException {
+    getWrappedStream().write(arg0);
+  }
+
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/PipelineImpl.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/PipelineImpl.java
new file mode 100644
index 0000000..9c32d33
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/PipelineImpl.java
@@ -0,0 +1,78 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.impl;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+import javax.xml.namespace.QName;
+
+import org.apache.cocoon.pipeline.NonCachingPipeline;
+import org.apache.cocoon.pipeline.component.sax.AbstractGenerator;
+import org.apache.cocoon.pipeline.component.sax.XMLSerializer;
+import org.apache.sling.scripting.xproc.cocoon.generator.SlingGenerator;
+import org.apache.sling.scripting.xproc.xpl.XplConstants;
+import org.apache.sling.scripting.xproc.xpl.api.Pipeline;
+import org.apache.sling.scripting.xproc.xpl.api.Step;
+
+public class PipelineImpl extends AbstractCompoundStepImpl implements Pipeline {
+
+	@Override
+	public void eval() throws Exception {		
+		try {
+			
+			this.getEnv().setCcPipeline(new NonCachingPipeline());
+			
+			// generator
+			AbstractGenerator generator = new SlingGenerator(this.getEnv().getSling());
+			this.getEnv().getCcPipeline().addComponent(generator);
+			
+			// subpipeline evaluated
+			for (Step step : this.getSubpipeline()) {
+				step.eval();
+			}
+			
+			this.getEnv().getCcPipeline().addComponent(new XMLSerializer());
+			
+			// Don't retrieve OutputStream from response until actually writing
+			// to response, so that error handlers can retrieve it without getting
+			// an error
+			final OutputStream out = new OutputStreamWrapper() {
+        @Override
+        protected OutputStream getWrappedStream() throws IOException {
+          return getEnv().getSling().getResponse().getOutputStream();
+        }
+			};
+			
+			this.getEnv().getCcPipeline().setup(out);
+			this.getEnv().getCcPipeline().execute();
+			
+		} catch (Exception e) {
+			String absPath = this.getEnv().getSling().getRequest().getResource().getPath();
+			throw new Exception("Error in pipeline for resource: " + absPath, e);
+		}
+		
+	}
+
+	@Override
+	public QName getQName() {
+		return XplConstants.QNAME_PIPELINE;
+	}
+	
+}
\ No newline at end of file
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/XplElementFactoryImpl.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/XplElementFactoryImpl.java
new file mode 100644
index 0000000..92d0db4
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/XplElementFactoryImpl.java
@@ -0,0 +1,52 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.impl;
+
+import java.util.Map;
+
+import javax.xml.namespace.QName;
+
+import org.apache.sling.scripting.xproc.xpl.XplConstants;
+import org.apache.sling.scripting.xproc.xpl.api.XplElement;
+import org.apache.sling.scripting.xproc.xpl.api.XplElementFactory;
+
+public class XplElementFactoryImpl implements XplElementFactory {
+	
+	public XplElement createXplElement(QName type, Map<String, String> attributes) {
+		
+		XplElement xplElement;
+		
+		if (XplConstants.QNAME_PIPELINE.equals(type)) {
+			xplElement = new PipelineImpl();
+		} else if (XplConstants.QNAME_XSLT.equals(type)) {
+			xplElement = new XsltImpl();
+		} else if (XplConstants.QNAME_INPUT.equals(type)) {
+			xplElement = new InputImpl();
+		} else if (XplConstants.QNAME_DOCUMENT.equals(type)) {
+			xplElement = new DocumentImpl();
+		} else {
+			throw new IllegalArgumentException("An xpl element of type '" + type + "' could not be created.");
+		}
+		
+		xplElement.setAttributes(attributes);
+		
+		return xplElement;
+	}
+
+}
diff --git a/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/XsltImpl.java b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/XsltImpl.java
new file mode 100644
index 0000000..140c578
--- /dev/null
+++ b/src/main/java/org/apache/sling/scripting/xproc/xpl/impl/XsltImpl.java
@@ -0,0 +1,51 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl.impl;
+
+import javax.xml.namespace.QName;
+
+import org.apache.sling.scripting.xproc.cocoon.transform.SlingTransformer;
+import org.apache.sling.scripting.xproc.xpl.XplConstants;
+import org.apache.sling.scripting.xproc.xpl.api.Input;
+import org.apache.sling.scripting.xproc.xpl.api.Xslt;
+
+public class XsltImpl extends AbstractStepImpl implements Xslt {
+
+	private Input stylesheet;
+	
+	@Override
+	public void eval() {		
+		String href = this.getStylesheet().getDocument().getHref();
+		this.getEnv().getCcPipeline().addComponent(new SlingTransformer(this.getEnv().getSling(), href));
+	}
+	
+	public Input getStylesheet() {
+		return stylesheet;
+	}
+
+	public void setStylesheet(Input stylesheet) {
+		this.stylesheet = stylesheet;
+	}
+	
+	@Override
+	public QName getQName() {
+		return XplConstants.QNAME_XSLT;
+	}
+	
+}
\ No newline at end of file
diff --git a/src/main/resources/META-INF/DISCLAIMER b/src/main/resources/META-INF/DISCLAIMER
new file mode 100644
index 0000000..90850c2
--- /dev/null
+++ b/src/main/resources/META-INF/DISCLAIMER
@@ -0,0 +1,7 @@
+Apache Sling is an effort undergoing incubation at The Apache Software Foundation (ASF),
+sponsored by the Apache Jackrabbit PMC. Incubation is required of all newly accepted
+projects until a further review indicates that the infrastructure, communications,
+and decision making process have stabilized in a manner consistent with other
+successful ASF projects. While incubation status is not necessarily a reflection of
+the completeness or stability of the code, it does indicate that the project has yet
+to be fully endorsed by the ASF.
\ No newline at end of file
diff --git a/src/main/resources/META-INF/LICENSE b/src/main/resources/META-INF/LICENSE
new file mode 100644
index 0000000..7a4a3ea
--- /dev/null
+++ b/src/main/resources/META-INF/LICENSE
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
\ No newline at end of file
diff --git a/src/main/resources/META-INF/NOTICE b/src/main/resources/META-INF/NOTICE
new file mode 100644
index 0000000..32e03f4
--- /dev/null
+++ b/src/main/resources/META-INF/NOTICE
@@ -0,0 +1,8 @@
+Apache Sling Pipeline Scripting Support
+Copyright 2008-2009 The Apache Software Foundation
+
+Apache Sling is based on source code originally developed 
+by Day Software (http://www.day.com/).
+
+This product includes software developed at
+The Apache Software Foundation (http://www.apache.org/).
diff --git a/src/main/resources/META-INF/services/javax.script.ScriptEngineFactory b/src/main/resources/META-INF/services/javax.script.ScriptEngineFactory
new file mode 100644
index 0000000..95534a7
--- /dev/null
+++ b/src/main/resources/META-INF/services/javax.script.ScriptEngineFactory
@@ -0,0 +1 @@
+org.apache.sling.scripting.xproc.XProcScriptEngineFactory
\ No newline at end of file
diff --git a/src/test/java/org/apache/sling/scripting/xproc/xpl/XplBuilderTest.java b/src/test/java/org/apache/sling/scripting/xproc/xpl/XplBuilderTest.java
new file mode 100644
index 0000000..6931670
--- /dev/null
+++ b/src/test/java/org/apache/sling/scripting/xproc/xpl/XplBuilderTest.java
@@ -0,0 +1,68 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.scripting.xproc.xpl;
+
+import java.io.BufferedReader;
+import java.io.ByteArrayOutputStream;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+
+import org.apache.sling.scripting.xproc.xpl.api.Step;
+import org.custommonkey.xmlunit.XMLAssert;
+import org.custommonkey.xmlunit.XMLUnit;
+
+import junit.framework.TestCase;
+
+public class XplBuilderTest extends TestCase {
+	
+	@Override
+	protected void setUp() throws Exception {
+		super.setUp();
+		XMLUnit.setIgnoreComments(true);
+		XMLUnit.setIgnoreWhitespace(true);
+	}
+	
+	public void testBuild() throws Exception {		
+		String xplPath = "/xpl/html.xpl";		
+		XplBuilder builder = new XplBuilder();
+		Step pipeline = builder.build(getReaderFromPath(xplPath));
+		String strControl = toString(getClass().getResourceAsStream(xplPath));
+		XMLAssert.assertXMLEqual(strControl, pipeline.toString());
+	}
+	
+	private Reader getReaderFromPath(String path) throws Exception {
+		InputStream is = getClass().getResourceAsStream(path);
+		Reader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
+		return reader;
+	}
+	
+	private String toString(InputStream ins) throws Exception {
+        ByteArrayOutputStream bos = new ByteArrayOutputStream();
+        byte[] buf = new byte[1024];
+        int rd;
+        while ( (rd = ins.read(buf)) >= 0) {
+            bos.write(buf, 0, rd);
+        }
+        bos.close();
+
+        return new String(bos.toByteArray(), "UTF-8");
+    }
+	
+}
diff --git a/src/test/resources/xpl/html.xpl b/src/test/resources/xpl/html.xpl
new file mode 100644
index 0000000..5dd16be
--- /dev/null
+++ b/src/test/resources/xpl/html.xpl
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  Licensed to the Apache Software Foundation (ASF) under one or more
+  contributor license agreements.  See the NOTICE file distributed with
+  this work for additional information regarding copyright ownership.
+  The ASF licenses this file to You under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with
+  the License.  You may obtain a copy of the License at
+  
+  http://www.apache.org/licenses/LICENSE-2.0
+  
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+-->
+<p:pipeline xmlns:p="http://www.w3.org/ns/xproc">
+
+  <p:xslt>
+    <p:input port="stylesheet">
+      <p:document href="/xpl-sample/xsl/test-content.xslt"/>
+    </p:input>
+  </p:xslt>
+  
+  <p:xslt>
+    <p:input port="stylesheet">
+      <p:document href="/xpl-sample/xsl/test-html.xslt"/>
+    </p:input>
+  </p:xslt>
+  
+</p:pipeline>
\ No newline at end of file

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