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From pde...@apache.org
Subject svn commit: r911579 - /felix/trunk/dependencymanager/test/src/test/java/org/apache/felix/dm/test/BundleGenerator.java
Date Thu, 18 Feb 2010 20:59:58 GMT
Author: pderop
Date: Thu Feb 18 20:59:58 2010
New Revision: 911579

URL: http://svn.apache.org/viewvc?rev=911579&view=rev
Log:
added helper class used to generate a bundle dynamically

Added:
    felix/trunk/dependencymanager/test/src/test/java/org/apache/felix/dm/test/BundleGenerator.java

Added: felix/trunk/dependencymanager/test/src/test/java/org/apache/felix/dm/test/BundleGenerator.java
URL: http://svn.apache.org/viewvc/felix/trunk/dependencymanager/test/src/test/java/org/apache/felix/dm/test/BundleGenerator.java?rev=911579&view=auto
==============================================================================
--- felix/trunk/dependencymanager/test/src/test/java/org/apache/felix/dm/test/BundleGenerator.java
(added)
+++ felix/trunk/dependencymanager/test/src/test/java/org/apache/felix/dm/test/BundleGenerator.java
Thu Feb 18 20:59:58 2010
@@ -0,0 +1,163 @@
+/*
+* 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.felix.dm.test;
+
+import java.io.File;
+import java.io.FileWriter;
+import java.io.PrintWriter;
+import java.net.URL;
+import java.util.Properties;
+
+import aQute.bnd.main.bnd;
+
+/**
+ * Helper used to generate a bundle dynamically.
+ */
+public class BundleGenerator
+{
+    /**
+     * The Bnd directives
+     */
+    private Properties _directives = new Properties();
+
+    /**
+     * The class loader used to get the classpath where to collect the bundle classes
+     */
+    private ClassLoader _classLoader = BundleGenerator.class.getClassLoader();
+
+    /**
+     * Sets a Bnd directive
+     * @param attributeName the directive name (can start with a "-")
+     * @param attributeValue the directive value
+     * @return ourself
+     */
+    public BundleGenerator set(String attributeName, String attributeValue)
+    {
+        _directives.put(attributeName, attributeValue);
+        return this;
+    }
+
+    /**
+     * Sets a specific class loader, which will be used to get the classpath where to collect
+     * the bundle classes. By default, the class loader used is the BundleGenerator class
loader.
+     * @param cl the class loader that will be used to get the bundle classpath
+     * @return ourself
+     */
+    public BundleGenerator setClassLoader(ClassLoader cl)
+    {
+        _classLoader = cl;
+        return this;
+    }
+
+    /**
+     * Generates the output bundle
+     * @return the bundle URL, as a String
+     */
+    public String build()
+    {
+        try
+        {
+            // Deduce the classpath from Export-Package, or Private-Package headers.
+
+            String pkg = _directives.getProperty("Private-Package");
+            if (pkg == null)
+            {
+                pkg = _directives.getProperty("Private-Package");
+            }
+            if (pkg == null)
+            {
+                throw new IllegalArgumentException(
+                    "You must either specify a Private-Package, or an Export-Package directive");
+            }
+
+            String classpath = getClassPath(pkg);
+
+            // Create the bundle output file
+
+            File output = File.createTempFile("DMTestBundle", ".jar");
+            output.deleteOnExit();
+
+            // Create the bnd directive file
+
+            File directives = File.createTempFile("DMTestBnd", ".bnd");
+            directives.deleteOnExit();
+
+            // Write the directives into the bnd file.
+
+            PrintWriter pw = new PrintWriter(new FileWriter(directives));
+            try
+            {
+                for (Object key : _directives.keySet())
+                {
+                    Object value = _directives.get(key);
+                    if (key.toString().startsWith("-"))
+                    {
+                        pw.println(key.toString() + " " + value.toString());
+                    }
+                    else
+                    {
+                        pw.println(key.toString() + ": " + value.toString());
+                    }
+                }
+            }
+
+            finally
+            {
+                pw.close();
+            }
+
+            // Launch Bnd in order to generate our tiny test bundle.
+
+            bnd bnd = new bnd();
+            bnd.main(new String[] { "-failok", "build", "-noeclipse", "-classpath", classpath,
+                    "-output", output.getPath(), directives.getPath() });
+
+            // Return the URL of the generated bundle, as a String.
+
+            return output.toURI().toURL().toString();
+        }
+
+        catch (RuntimeException e)
+        {
+            throw e;
+        }
+
+        catch (Throwable t)
+        {
+            throw new RuntimeException("Unexpected exception while generating DM test bundle",
t);
+        }
+    }
+
+    /**
+     * Gets the bundle classpath, where the bundle classes will be collected.
+     * @param pkg either an exported package, or a private package.
+     * @return the bundle classpath
+     */
+    private String getClassPath(String pkg)
+    {
+        String pkgPath = pkg.replaceAll("\\.", "/");
+        URL pkgURL = _classLoader.getResource(pkgPath);
+        if (pkgURL == null)
+        {
+            throw new IllegalArgumentException("Could not find package " + pkg + " in classpath");
+        }
+        int i = pkgURL.getPath().indexOf(pkgPath);
+        return i == -1 ? pkgURL.getPath() : pkgURL.getPath().substring(0, i);
+    }
+}



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