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From diwa...@apache.org
Subject svn commit: r240009 - in /forrest/trunk/etc/test-whitespace: AbstractWrappingModule.java.jalopy XPathTransformer.java.jalopy
Date Thu, 25 Aug 2005 07:17:57 GMT
Author: diwaker
Date: Thu Aug 25 00:17:55 2005
New Revision: 240009

URL: http://svn.apache.org/viewcvs?rev=240009&view=rev
Log:
Added "jalopied" version of test files.


Added:
    forrest/trunk/etc/test-whitespace/AbstractWrappingModule.java.jalopy
    forrest/trunk/etc/test-whitespace/XPathTransformer.java.jalopy

Added: forrest/trunk/etc/test-whitespace/AbstractWrappingModule.java.jalopy
URL: http://svn.apache.org/viewcvs/forrest/trunk/etc/test-whitespace/AbstractWrappingModule.java.jalopy?rev=240009&view=auto
==============================================================================
--- forrest/trunk/etc/test-whitespace/AbstractWrappingModule.java.jalopy (added)
+++ forrest/trunk/etc/test-whitespace/AbstractWrappingModule.java.jalopy Thu Aug 25 00:17:55
2005
@@ -0,0 +1,96 @@
+/*
+ * Copyright 1999-2004 The Apache Software Foundation or its licensors,
+ * as applicable.
+ *
+ * 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.
+ */
+
+package org.apache.forrest.locationmap;
+
+import org.apache.avalon.framework.activity.Disposable;
+import org.apache.avalon.framework.configuration.Configurable;
+import org.apache.avalon.framework.configuration.Configuration;
+import org.apache.avalon.framework.configuration.ConfigurationException;
+import org.apache.avalon.framework.logger.AbstractLogEnabled;
+import org.apache.avalon.framework.logger.LogEnabled;
+import org.apache.avalon.framework.service.ServiceException;
+import org.apache.avalon.framework.service.ServiceManager;
+import org.apache.avalon.framework.service.Serviceable;
+
+import org.apache.cocoon.components.modules.input.InputModule;
+
+import java.util.Iterator;
+import java.util.Map;
+
+
+public abstract class AbstractWrappingModule extends AbstractLogEnabled
+    implements InputModule, Configurable, Serviceable, Disposable {
+    InputModule    child;
+    ServiceManager manager;
+
+    public void service(ServiceManager manager) throws ServiceException {
+        this.manager = manager;
+    }
+
+    public void configure(Configuration config) throws ConfigurationException {
+        Configuration childConf      = config.getChild("component-instance");
+        String        childClassName = childConf.getAttribute("class");
+        getLogger().debug("Loading wrapped class:" + childClassName);
+
+        try {
+            child = (InputModule) Class.forName(childClassName).newInstance();
+            getLogger().debug("Wrapped class instantiated:" + child);
+
+            if(child instanceof LogEnabled) {
+                ((LogEnabled) child).enableLogging(getLogger());
+                getLogger().debug("Wrapped class LogEnabled");
+            }
+
+            if(child instanceof Serviceable) {
+                ((Serviceable) child).service(manager);
+                getLogger().debug("Wrapped class Serviced");
+            }
+
+            if(child instanceof Configurable) {
+                ((Configurable) child).configure(config.getChild(
+                        "component-instance"));
+                getLogger().debug("Wrapped class Configured");
+            }
+        } catch(Exception e) {
+            throw new ConfigurationException(
+                "Cannot instatiate the wrapped Module of class:" +
+                childClassName, e);
+        }
+    }
+
+    public Object getAttribute(String name, Configuration modeConf,
+        Map objectModel) throws ConfigurationException {
+        return child.getAttribute(name, modeConf, objectModel);
+    }
+
+    public Iterator getAttributeNames(Configuration modeConf, Map objectModel)
+        throws ConfigurationException {
+        return child.getAttributeNames(modeConf, objectModel);
+    }
+
+    public Object[] getAttributeValues(String name, Configuration modeConf,
+        Map objectModel) throws ConfigurationException {
+        return child.getAttributeValues(name, modeConf, objectModel);
+    }
+
+    public void dispose() {
+        if(child instanceof Disposable) {
+            ((Disposable) child).dispose();
+        }
+    }
+}

Added: forrest/trunk/etc/test-whitespace/XPathTransformer.java.jalopy
URL: http://svn.apache.org/viewcvs/forrest/trunk/etc/test-whitespace/XPathTransformer.java.jalopy?rev=240009&view=auto
==============================================================================
--- forrest/trunk/etc/test-whitespace/XPathTransformer.java.jalopy (added)
+++ forrest/trunk/etc/test-whitespace/XPathTransformer.java.jalopy Thu Aug 25 00:17:55 2005
@@ -0,0 +1,439 @@
+/*
+ * Copyright 1999-2004 The Apache Software Foundation or its licensors,
+ * as applicable.
+ *
+ * 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.
+ */
+
+package org.apache.forrest.util;
+
+import org.apache.avalon.framework.parameters.Parameters;
+import org.apache.avalon.framework.service.ServiceException;
+import org.apache.avalon.framework.service.ServiceManager;
+
+import org.apache.cocoon.ProcessingException;
+import org.apache.cocoon.caching.CacheableProcessingComponent;
+import org.apache.cocoon.environment.SourceResolver;
+import org.apache.cocoon.transformation.AbstractDOMTransformer;
+import org.apache.cocoon.util.HashUtil;
+
+import org.apache.excalibur.source.SourceValidity;
+import org.apache.excalibur.source.impl.validity.NOPValidity;
+import org.apache.excalibur.xml.dom.DOMParser;
+import org.apache.excalibur.xml.xpath.XPathProcessor;
+
+import org.w3c.dom.Attr;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+
+import org.xml.sax.SAXException;
+
+import java.io.IOException;
+import java.io.Serializable;
+
+import java.util.Map;
+import java.util.Stack;
+
+
+/**
+ * A transformer that prunes the source tree based on <code>include</code> and
+ * <code>exclude</code> XPath expressions.
+ * The <code>include</code> parameter specifies nodes to let through, and
+ * <code>exclude</code> parameter nodes to filter out. Either or both may be
+ * omitted. The default behaviour is for all nodes to be let through
+ * (<code>include</code> = "/").
+ * <p>
+ * This transformer should be declared in the sitemap at
+ * <b>map:sitemap/map:components/map:transformers</b>, as follows<br>
+ * <pre>
+ * &lt;map:transformer logger="sitemap.transformer.xpath" name="xpath" src="org.apache.cocoon.transformation.XPathTransformer"
/&gt;<br>
+ * </pre>
+ * <h3>Example usage</h3>
+ * As an example, consider a user manual XML file:
+ * <pre>
+ * &lt;manual&gt;
+ *   &lt;s1 title="Introduction"&gt;
+ *     &lt;p&gt;This is the introduction&lt;/p&gt;
+ *     &lt;p&gt;A second paragraph&lt;/p&gt;
+ *   &lt;/s1&gt;
+ *   &lt;s1 title="Getting started"&gt;
+ *     &lt;p&gt;Getting started&lt;/p&gt;
+ *     &lt;fixme&gt;Add some content here&lt;/fixme&gt;
+ *     &lt;n:note xmlns:n="urn:notes"&gt;banana 1&lt;/n:note&gt; &lt;note&gt;banana
2&lt;/note&gt;
+ *     &lt;p&gt;Yes, we have no bananas&lt;/p&gt;
+ *   &lt;/s1&gt;
+ * &lt;/manual&gt;
+ * </pre>
+ * We could now deliver named chapters as follows:
+ * <pre>
+ *   &lt;map:match pattern="manual/*"&gt;
+ *      &lt;map:generate src="manual.xml"/&gt;
+ *      &lt;map:transform type="xpath"&gt;
+ *        &lt;map:parameter name="include" value="/manual/s1[@title='{1}']"/&gt;
+ *      &lt;/map:transform&gt;
+ *     &lt;map:serialize type="xml"/&gt;
+ *   &lt;/map:match&gt;
+ * </pre>
+ * So <code>manual/Introduction</code> would return the first chapter.
+ */
+public class XPathTransformer extends AbstractDOMTransformer
+    implements CacheableProcessingComponent {
+    /** XPath Processor */
+    private XPathProcessor processor = null;
+    private DOMParser      parser = null;
+
+    /** XPath specifying nodes to include. Defaults to the root node */
+    protected String include = null;
+
+    /** XPath specifying nodes to exclude. Defaults to "" (no exclusions) */
+    protected String exclude = null;
+
+    public void setup(SourceResolver resolver, Map objectModel, String source,
+        Parameters parameters)
+        throws ProcessingException, SAXException, IOException {
+        super.setup(resolver, objectModel, source, parameters);
+        this.include     = parameters.getParameter("include", "/");
+        this.exclude     = parameters.getParameter("exclude", null);
+    }
+
+    public void service(ServiceManager manager) throws ServiceException {
+        super.service(manager);
+
+        try {
+            this.processor = (XPathProcessor) this.manager.lookup(XPathProcessor.ROLE);
+        } catch(Exception e) {
+            getLogger().error("cannot obtain XPathProcessor", e);
+        }
+
+        try {
+            this.parser = (DOMParser) this.manager.lookup(DOMParser.ROLE);
+        } catch(Exception e) {
+            getLogger().error("cannot obtain DOMParser", e);
+        }
+    }
+
+    /** Implementation of a template method declared in AbstractDOMTransformer.
+     * @param doc DOM of XML received by the transformer
+     * @return A pared-down DOM.
+     */
+    protected Document transform(Document doc) {
+        getLogger().debug("Transforming with include='" + include +
+            "', exclude='" + exclude + "'");
+
+        Document newDoc = null;
+
+        try {
+            newDoc     = handleIncludes(doc, this.include);
+            newDoc     = handleExcludes(newDoc, this.exclude);
+        } catch(SAXException se) {
+            // Really ought to be able to propagate these to caller
+            getLogger().error("Error when transforming XML", se);
+            throw new RuntimeException(
+                "Error transforming XML. See error log for details: " + se);
+        }
+
+        return newDoc;
+    }
+
+    /**
+     * Construct a new DOM containing nodes matched by <code>include</code> XPath
expression.
+     * @param doc Original DOM
+     * @param xpath XPath include expression
+     * @return DOM containing nodes from <code>doc</code> matched by <code>XPath</code>
+     */
+    private Document handleIncludes(Document doc, String xpath)
+        throws SAXException {
+        if((xpath == null) || xpath.equals("/")) {
+            return doc;
+        }
+
+        Document newDoc = parser.createDocument();
+        NodeList nodes = processor.selectNodeList(doc, xpath);
+
+        for(int i = 0; i < nodes.getLength(); i++) {
+            Node node = nodes.item(i);
+            addNode(newDoc, node);
+        }
+
+        return newDoc;
+    }
+
+    /**
+     * Construct a new DOM excluding nodes matched by <code>exclude</code> XPath
expression.
+     * @param doc Original DOM
+     * @param xpath XPath exclude expression
+     * @return DOM containing nodes from <code>doc</code>, excluding those
+     * matched by <code>XPath</code>
+     */
+    private Document handleExcludes(Document doc, String xpath) {
+        if((xpath == null) || xpath.trim().equals("")) {
+            return doc;
+        }
+
+        NodeList nodes = processor.selectNodeList(doc, xpath);
+
+        for(int i = 0; i < nodes.getLength(); i++) {
+            Node node = nodes.item(i);
+
+            // Detach this node. Attr nodes need to be handled specially
+            if(node.getNodeType() == Node.ATTRIBUTE_NODE) {
+                Attr    attrNode = (Attr) node;
+                Element parent = attrNode.getOwnerElement();
+                parent.removeAttributeNode(attrNode);
+            } else {
+                Node parent = node.getParentNode();
+
+                if(parent != null) {
+                    parent.removeChild(node);
+                }
+            }
+        }
+
+        return doc;
+    }
+
+    /**
+     * Add a node to the Document, including all of the node's ancestor nodes.
+     * Eg, if <code>node</code> is the title="Introduction" node in the
+     * example, the doc would have node /manual/s1/@title='Introduction' added
+     * to it.
+     *
+     * @fixme This method could do with some optimization. Currently, every
+     * node addition results in one expensive node equality check per ancestor
+     * @param doc Document to add a node to
+     * @param nodeTemplate Node from another Document which we wish to
+     * replicate in <code>doc</code>. This is used as a template, not actually
+     * physically copied.
+     */
+    private void addNode(Document doc, final Node nodeTemplate) {
+        // Get a stack of node's ancestors (inclusive)
+        Stack    stack  = new Stack();
+        Node     parent = nodeTemplate;
+        Document oldDoc = nodeTemplate.getOwnerDocument();
+
+        while(parent != oldDoc) {
+            stack.push(parent);
+            parent = parent.getParentNode();
+        }
+
+        // Example stack: (top) [ /manual, /manual/s1, /manual/s1/@title ] (bottom)
+        // Now from the earliest (root) ancestor, add cloned nodes to the
+        // doc. We check if a suitable ancestor node doesn't already exist in
+        // addNode()
+        parent = doc;
+
+        while(!stack.empty()) {
+            Node oldNode = (Node) stack.pop();
+            Node newNode = null;
+
+            if(!stack.empty()) {
+                // Shallow copy o a parent node (in example: /manual, then /manual/s1)
+                newNode = doc.importNode(oldNode, false); // Do a shallow copy
+                copyNamespaceDeclarations(oldNode, newNode);
+                parent = findOrCreateNode(parent, newNode);
+            } else {
+                // Deep copy of the matched node (in example: /manual/s1/@title)
+                newNode = doc.importNode(oldNode, true);
+                copyNamespaceDeclarations(oldNode, newNode);
+                parent.appendChild(newNode);
+            }
+        }
+    }
+
+    /**
+     * Add xmlns namespace declaration attribute to newNode, based on those from oldNode.
+     * It seems that a DOM object built from SAX with namespace-prefixes=false
+     * doesn't have xmlns attribute declarations by default, so we must
+     * manually add them.
+     * @param oldNode Original node, with namespace attributes intact
+     * @param newNode If an Element, this node will have an <code>xmlns</code>
+     * (or <code>xmlns:prefix</code>) attribute added to define the node's namespace.
+     */
+    private void copyNamespaceDeclarations(final Node oldNode, Node newNode) {
+        if(newNode.getNodeType() == Node.ELEMENT_NODE) {
+            String  prefix  = oldNode.getPrefix();
+            String  nsURI   = oldNode.getNamespaceURI();
+            Element newElem = (Element) newNode;
+
+            if(nsURI != null) {
+                if((prefix == null) || prefix.equals("")) {
+                    if(!newElem.hasAttribute("xmlns")) {
+                        newElem.setAttribute("xmlns", nsURI);
+                    }
+                } else {
+                    if(!newElem.hasAttribute("xmlns:" + prefix)) {
+                        newElem.setAttribute("xmlns:" + prefix, nsURI);
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * Add newNode as a child of parent, first checking if any equivalent node
+     * to newNode already exists as a child of parent.
+     *
+     * @param parent Parent node of found or created node
+     * @param newNode The node potentially added to parent, unless parent
+     * already has an equivalent node
+     * @return the appended node, or the old equivalent node if found.
+     */
+    private Node findOrCreateNode(Node parent, Node newNode) {
+        NodeList otherChildren = parent.getChildNodes();
+
+        for(int i = 0; i < otherChildren.getLength(); i++) {
+            Node child = otherChildren.item(i);
+
+            if(nodeEquality(child, newNode)) {
+                // Found existing equivalent node
+                return child;
+            }
+        }
+
+        // No existing equivalent node found; add and return newNode
+        parent.appendChild(newNode);
+
+        return newNode;
+    }
+
+    /**
+     * Shallow-test two nodes for equality.
+     * To quote from the Xerces DOM3 Node.isEqualNode() javadocs, from where
+     * most of the code is filched:
+     *
+     * [Nodes are equal if] the following string attributes are equal:
+     * <code>nodeName</code>, <code>localName</code>,
+     * <code>namespaceURI</code>, <code>prefix</code>, <code>nodeValue</code>.
+     * This is: they are both <code>null</code>, or they have the same length
+     * and are character for character identical.
+     */
+    private boolean nodeEquality(final Node n1, final Node n2) {
+        if(n1.getNodeType() != n2.getNodeType()) {
+            return false;
+        }
+
+        if(n1.getNodeName() == null) {
+            if(n2.getNodeName() != null) {
+                return false;
+            }
+        } else if(!n1.getNodeName().equals(n2.getNodeName())) {
+            return false;
+        }
+
+        if(n1.getLocalName() == null) {
+            if(n2.getLocalName() != null) {
+                return false;
+            }
+        } else if(!n1.getLocalName().equals(n2.getLocalName())) {
+            return false;
+        }
+
+        if(n1.getNamespaceURI() == null) {
+            if(n2.getNamespaceURI() != null) {
+                return false;
+            }
+        } else if(!n1.getNamespaceURI().equals(n2.getNamespaceURI())) {
+            return false;
+        }
+
+        if(n1.getPrefix() == null) {
+            if(n2.getPrefix() != null) {
+                return false;
+            }
+        } else if(!n1.getPrefix().equals(n2.getPrefix())) {
+            return false;
+        }
+
+        if(n1.getNodeValue() == null) {
+            if(n2.getNodeValue() != null) {
+                return false;
+            }
+        } else if(!n1.getNodeValue().equals(n2.getNodeValue())) {
+            return false;
+        }
+
+        return true;
+    }
+
+    // Unused debugging methods
+    private final void printNode(String msg, Node node) {
+        getLogger().info(msg + " " + node.getNodeName());
+    }
+
+    /*
+       private final void printDeepNode(String msg, Node node) {
+           try {
+               getLogger().info(msg+" "+XMLUtils.serializeNodeToXML(node));
+           } catch (ProcessingException pe) {
+               getLogger().error("Error printing node", pe);
+           }
+       }
+     */
+
+    // Cache methods
+
+    /**
+     * Generate the unique key.
+     * This key must be unique inside the space of this component.
+     *
+     * @return A hash of the include and exclude parameters, thus uniquely
+     * identifying this XPathTransformer amongst it's peers.
+     */
+    public Serializable getKey() {
+        return "" + HashUtil.hash(this.include + this.exclude);
+    }
+
+    // For backwards-compat
+    public Serializable generateKey() {
+        return getKey();
+    }
+
+    /**
+     * Generate the validity object.
+     *
+     * @return An "always valid" SourceValidity object. This transformer has no
+     * inputs other than the incoming SAX events.
+     */
+    public SourceValidity getValidity() {
+        return new NOPValidity();
+    }
+
+    // for backwards-compat
+    public SourceValidity generateValidity() {
+        return getValidity();
+    }
+
+    /**
+     * Recycle the component.
+     */
+    public void recycle() {
+        super.recycle();
+        this.include     = null;
+        this.exclude     = null;
+
+        // note that we don't turf our parser and processor,
+    }
+
+    /**
+     * dispose
+     */
+    public void dispose() {
+        super.dispose();
+        this.processor     = null;
+        this.parser        = null;
+        this.include       = null;
+        this.exclude       = null;
+    }
+}



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