added helper class used to generate a bundle dynamically
git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@911579 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/dependencymanager/test/src/test/java/org/apache/felix/dm/test/BundleGenerator.java b/dependencymanager/test/src/test/java/org/apache/felix/dm/test/BundleGenerator.java
new file mode 100644
index 0000000..3502fe3
--- /dev/null
+++ b/dependencymanager/test/src/test/java/org/apache/felix/dm/test/BundleGenerator.java
@@ -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);
+ }
+}