plugins/org.eclipse.objectteams.otdt/src/org/eclipse/objectteams/otdt/core/ext/OTREContainer.java - objectteams/org.eclipse.objectteams - Git at Google

 /**********************************************************************
  * This file is part of "Object Teams Development Tooling"-Software
  *
  * Copyright 2003, 2015 Fraunhofer Gesellschaft, Munich, Germany,
  * for its Fraunhofer Institute for Computer Architecture and Software
  * Technology (FIRST), Berlin, Germany and Technical University Berlin,
  * Germany.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Please visit http://www.eclipse.org/objectteams for updates and contact.
  *
  * Contributors:
  * Fraunhofer FIRST - Initial API and implementation
  * Technical University Berlin - Initial API and implementation
  **********************************************************************/
 package org.eclipse.objectteams.otdt.core.ext;

 import java.io.IOException;
 import java.net.URL;

 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.FileLocator;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Path;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.jdt.core.IClasspathContainer;
 import org.eclipse.jdt.core.IClasspathEntry;
 import org.eclipse.jdt.core.IJavaProject;
 import org.eclipse.jdt.core.JavaCore;
 import org.eclipse.jdt.core.JavaModelException;
 import org.eclipse.objectteams.otdt.internal.core.ext.OTCoreExtMessages;
 import org.eclipse.objectteams.otdt.internal.core.ext.OTVariableInitializer;
 import org.eclipse.objectteams.otequinox.TransformerPlugin;
 import org.osgi.framework.Bundle;
 import org.osgi.framework.BundleContext;
 import org.osgi.framework.ServiceReference;

 /**
  * This class serves the "OTRE" classpath container.
  * It also provides access to resolved paths for all OTRE-related jars.
  * @author gis
  */
 public class OTREContainer implements IClasspathContainer
 {
 	/** Name of this classpath container, which hosts the full OTRE. */
 	public static final String OTRE_CONTAINER_NAME     = "OTRE"; //$NON-NLS-1$

     // these are served from the current plugin:
     private static IPath  OTRE_MIN_JAR_PATH;
     private static IPath  OTRE_AGENT_JAR_PATH;
     private static IPath  OTDRE_AGENT_JAR_PATH;

     private static IPath[][]  BYTECODE_WEAVER_PATHS = new IPath[WeavingScheme.values().length][]; // will be initialized in {@link findBytecodeLib(BundleContext,boolean)}

     // details of this container: name and hosting plugin:
     private static final IPath  OTRE_CONTAINER_PATH = new Path(OTRE_CONTAINER_NAME);
     static String OT_RUNTIME_PLUGIN = "org.eclipse.objectteams.runtime"; //$NON-NLS-1$

     // file names for the above OTRE_X_JAR_PATH constants:
     private static final String OTRE_MIN_JAR_FILENAME   = "otre_min.jar"; //$NON-NLS-1$
     private static final String OTRE_AGENT_JAR_FILENAME = "otre_agent.jar"; //$NON-NLS-1$
     private static final String OTDRE_AGENT_JAR_FILENAME = "otredyn_agent.jar"; //$NON-NLS-1$

     private static final String OTRE_PLUGIN_NAME = "org.eclipse.objectteams.otre";
     private static final String OTDRE_PLUGIN_NAME = "org.eclipse.objectteams.otredyn";

     // data for initializing the above BYTECODE_LIBRARY_PATH:
     private static final String BCEL_BUNDLE_NAME = "org.apache.bcel"; //$NON-NLS-1$
     private static final String BCEL_VERSION_RANGE = "[5.2.0,5.3.0)"; //$NON-NLS-1$

     // data for initializing the ASM_PATH:
 	private static final String[] ASM_BUNDLE_NAMES = { "org.objectweb.asm", "org.objectweb.asm.tree", "org.objectweb.asm.commons", "org.objectweb.asm.util", "org.objectweb.asm.analysis" }; //$NON-NLS-1$
 	private static final String ASM_VERSION_RANGE = "[5.0.1,7.2.0)"; //$NON-NLS-1$


     private IClasspathEntry[] _cpEntries;

     /**
      * Return a an array of classpath entry representing the OTRE.
      * @return a singleton array.
      */
     public IClasspathEntry[] getClasspathEntries()
     {
         if (_cpEntries == null)
         {
             IPath fullPath = new Path(OTVariableInitializer.getInstallatedPath(OTDTPlugin.getDefault(), OT_RUNTIME_PLUGIN, "bin")); //$NON-NLS-1$
             _cpEntries = new IClasspathEntry[] {JavaCore.newLibraryEntry(fullPath, fullPath, new Path("/"))}; //$NON-NLS-1$
         }

         return _cpEntries;
     }

     /** Answer the text that describes the OTRE container in the UI. */
     public String getDescription()
     {
         return OTCoreExtMessages.OTREContainer__Description;
     }

     /**
      * Answer the kind of this classpath container, value = {@link IClasspathContainer#K_APPLICATION}.
      */
     public int getKind()
     {
     	// don't mark as K_SYSTEM or K_SYSTEM_DEFAULT, which would prevent jdt.debug from adding this to the runtime classpath.
     	return IClasspathContainer.K_APPLICATION;
     }

     /**
      * The name of this classpath container as a path, value = "OTRE".
      */
     public IPath getPath()
     {
         return OTRE_CONTAINER_PATH;
     }

     /**
      * Answer the path of the "otre_min.jar" archive, which is placed on the bootclasspath when running OT/J programs.
      * @return resolved path
      */
     public static IPath getOtreMinJarPath () {
     	if (OTRE_MIN_JAR_PATH == null)
             OTRE_MIN_JAR_PATH   = OTDTPlugin.getResolvedVariablePath(OTDTPlugin.OTDT_INSTALLDIR, "lib/"+OTRE_MIN_JAR_FILENAME); //$NON-NLS-1$
     	return OTRE_MIN_JAR_PATH;
     }

     /**
      * Answer the path of the "otre_agent.jar" archive, which is passed as a -javaagent to the JVM.
      * @return resolved path
      */
     public static IPath getOtreAgentJarPath(WeavingScheme scheme) {
     	switch (scheme) {
     	case OTRE:
     		if (OTRE_AGENT_JAR_PATH == null)
     			OTRE_AGENT_JAR_PATH = OTDTPlugin.getResolvedVariablePath(OTDTPlugin.OTDT_INSTALLDIR, "lib/"+OTRE_AGENT_JAR_FILENAME); //$NON-NLS-1$
     		return OTRE_AGENT_JAR_PATH;
     	case OTDRE:
     		if (OTDRE_AGENT_JAR_PATH == null)
     			OTDRE_AGENT_JAR_PATH = OTDTPlugin.getResolvedVariablePath(OTDTPlugin.OTDT_INSTALLDIR, "lib/"+OTDRE_AGENT_JAR_FILENAME); //$NON-NLS-1$
     		return OTDRE_AGENT_JAR_PATH;
     	default:
     		throw new IncompatibleClassChangeError("Unexpected enum constant "+scheme);
     	}
     }

     /**
      * Answer the path of the "otequinoxAgent.jar" archive, which is passed as a -javaagent to the JVM for OT/Equinox debug launches.
      * @return resolved path
      */
     public static IPath getOtequinoxAgentJarPath() {
     	return new Path(TransformerPlugin.getOtequinoxAgentPath());
     }

 	/**
 	 * Adds the ObjectTeams classes to the given JavaProject's classpath,
 	 * and ensures the Java compliance is >= 1.5
 	 * Handles both variants, OTRE and OTDRE.
 	 */
 	public static void initializeOTJProject(IProject project) throws CoreException
 	{
 		if (project == null)
 		{
 			return;
 		}

 		if (project.hasNature(JavaCore.NATURE_ID))
 		{
 			IJavaProject 	  javaPrj   = (IJavaProject) project.getNature(JavaCore.NATURE_ID);
 			IClasspathEntry[] classpath = javaPrj.getRawClasspath();

 			if (!isOTREAlreadyInClasspath(classpath))
 			{
 	            addOTREToClasspath(javaPrj, classpath);
 			}
 			String javaVersion = javaPrj.getOption(JavaCore.COMPILER_COMPLIANCE, true);
 			if (javaVersion.compareTo(JavaCore.VERSION_1_5)<0) {
 				javaPrj.setOption(JavaCore.COMPILER_COMPLIANCE, JavaCore.VERSION_1_5);
 				javaPrj.setOption(JavaCore.COMPILER_SOURCE, JavaCore.VERSION_1_5);
 				javaPrj.setOption(JavaCore.COMPILER_CODEGEN_TARGET_PLATFORM, JavaCore.VERSION_1_5);
 				javaPrj.setOption(JavaCore.COMPILER_PB_ASSERT_IDENTIFIER, JavaCore.ERROR);
 				javaPrj.setOption(JavaCore.COMPILER_PB_ENUM_IDENTIFIER, JavaCore.ERROR);
 				javaPrj.setOption(JavaCore.COMPILER_CODEGEN_INLINE_JSR_BYTECODE, JavaCore.ENABLED);
 			}
 		}
 	}

 	private static boolean isOTREAlreadyInClasspath(IClasspathEntry[] classpath) {
 	    for (int idx = 0; classpath != null && idx < classpath.length; idx++) {
 	        IClasspathEntry entry = classpath[idx];
 	        if (entry.getEntryKind() == IClasspathEntry.CPE_CONTAINER &&
 	        		(entry.getPath().equals(OTRE_CONTAINER_PATH)))
 				return true;
 	    }

 	    return false;
 	}

 	public static IPath getContainerPath() {
 		return OTRE_CONTAINER_PATH;
 	}

 	public static IPath[] getWeaverPaths(WeavingScheme scheme) {
 		return BYTECODE_WEAVER_PATHS[scheme.ordinal()];
 	}

 	/**
 	 * Add the object teams foundation classes to the classpath.
 	 */
 	private static void addOTREToClasspath(IJavaProject javaPrj, IClasspathEntry[] classpath)
 			throws JavaModelException, CoreException
 	{
 		IClasspathEntry[] newClasspath = new IClasspathEntry[classpath.length + 1];

 		System.arraycopy( classpath, 0, newClasspath, 0, classpath.length );

 		newClasspath[classpath.length] = JavaCore.newContainerEntry(OTRE_CONTAINER_PATH, false);

 		if (newClasspath[classpath.length] != null)
 			javaPrj.setRawClasspath( newClasspath, null );
 		else
 			throw new CoreException( new Status(
 										IStatus.ERROR,
 										OTDTPlugin.PLUGIN_ID,
 										IStatus.OK,
 										OTCoreExtMessages.OTREContainer_otre_not_found,
 										null) );
 	}

 	/** Fetch the location of the otre, otdre, bcel and asm bundles into {@link #BYTECODE_WEAVER_PATHS}. */
 	@SuppressWarnings("deprecation") // class PackageAdmin is "deprecated"
 	static void findBytecodeLibs(BundleContext context) throws IOException {
 		ServiceReference<org.osgi.service.packageadmin.PackageAdmin> ref =
 				(ServiceReference<org.osgi.service.packageadmin.PackageAdmin>) context.getServiceReference(org.osgi.service.packageadmin.PackageAdmin.class);
 		if (ref == null)
 			throw new IllegalStateException("Cannot connect to PackageAdmin"); //$NON-NLS-1$
 		org.osgi.service.packageadmin.PackageAdmin packageAdmin = context.getService(ref);
 		BCEL: {
 			String bundleName = BCEL_BUNDLE_NAME;
 			String bundleVersionRange = BCEL_VERSION_RANGE;
 			for (Bundle bundle : packageAdmin.getBundles(bundleName, bundleVersionRange)) {
 				BYTECODE_WEAVER_PATHS[WeavingScheme.OTRE.ordinal()] =
 						new IPath[] {
 							new Path(FileLocator.toFileURL(bundle.getEntry("/")).getFile()), //$NON-NLS-1$
 							new Path(OTVariableInitializer.getInstallatedPath(OTDTPlugin.getDefault(), OTRE_PLUGIN_NAME, "bin")) //$NON-NLS-1$
 						};
 				break BCEL;
 			}
 			throw new RuntimeException("bytecode libarary for OTRE not found"); //$NON-NLS-1$
 		}
 		ASM : {
 			int asm = WeavingScheme.OTDRE.ordinal();
 			int numBundles = ASM_BUNDLE_NAMES.length+1;
 			BYTECODE_WEAVER_PATHS[asm] = new IPath[numBundles];
 			int i = 0;
 			BYTECODE_WEAVER_PATHS[asm][i++] = new Path(OTVariableInitializer.getInstallatedPath(OTDTPlugin.getDefault(), OTDRE_PLUGIN_NAME, "bin")); //$NON-NLS-1$
 			for (String bundleName : ASM_BUNDLE_NAMES) {
 				for (Bundle bundle : packageAdmin.getBundles(bundleName, ASM_VERSION_RANGE)) {
 					URL bundleEntry = bundle.getEntry("bin"); // source project?
 					if (bundleEntry == null)
 						bundleEntry = bundle.getEntry("/"); // binary bundle
 					BYTECODE_WEAVER_PATHS[asm][i++] = new Path(FileLocator.toFileURL(bundleEntry).getFile()); //$NON-NLS-1$
 					break;
 				}
 			}
 			if (i == numBundles)
 				break ASM;
 			throw new RuntimeException("bytecode libarary for OTDRE not found"); //$NON-NLS-1$
 		}
 	}

 }
	/**********************************************************************
	* This file is part of "Object Teams Development Tooling"-Software
	*
	* Copyright 2003, 2015 Fraunhofer Gesellschaft, Munich, Germany,
	* for its Fraunhofer Institute for Computer Architecture and Software
	* Technology (FIRST), Berlin, Germany and Technical University Berlin,
	* Germany.
	*
	* This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Please visit http://www.eclipse.org/objectteams for updates and contact.
	*
	* Contributors:
	* Fraunhofer FIRST - Initial API and implementation
	* Technical University Berlin - Initial API and implementation
	**********************************************************************/
	package org.eclipse.objectteams.otdt.core.ext;

	import java.io.IOException;
	import java.net.URL;

	import org.eclipse.core.resources.IProject;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.FileLocator;
	import org.eclipse.core.runtime.IPath;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.Path;
	import org.eclipse.core.runtime.Status;
	import org.eclipse.jdt.core.IClasspathContainer;
	import org.eclipse.jdt.core.IClasspathEntry;
	import org.eclipse.jdt.core.IJavaProject;
	import org.eclipse.jdt.core.JavaCore;
	import org.eclipse.jdt.core.JavaModelException;
	import org.eclipse.objectteams.otdt.internal.core.ext.OTCoreExtMessages;
	import org.eclipse.objectteams.otdt.internal.core.ext.OTVariableInitializer;
	import org.eclipse.objectteams.otequinox.TransformerPlugin;
	import org.osgi.framework.Bundle;
	import org.osgi.framework.BundleContext;
	import org.osgi.framework.ServiceReference;

	/**
	* This class serves the "OTRE" classpath container.
	* It also provides access to resolved paths for all OTRE-related jars.
	* @author gis
	*/
	public class OTREContainer implements IClasspathContainer
	{
	/** Name of this classpath container, which hosts the full OTRE. */
	public static final String OTRE_CONTAINER_NAME = "OTRE"; //$NON-NLS-1$

	// these are served from the current plugin:
	private static IPath OTRE_MIN_JAR_PATH;
	private static IPath OTRE_AGENT_JAR_PATH;
	private static IPath OTDRE_AGENT_JAR_PATH;

	private static IPath[][] BYTECODE_WEAVER_PATHS = new IPath[WeavingScheme.values().length][]; // will be initialized in {@link findBytecodeLib(BundleContext,boolean)}

	// details of this container: name and hosting plugin:
	private static final IPath OTRE_CONTAINER_PATH = new Path(OTRE_CONTAINER_NAME);
	static String OT_RUNTIME_PLUGIN = "org.eclipse.objectteams.runtime"; //$NON-NLS-1$

	// file names for the above OTRE_X_JAR_PATH constants:
	private static final String OTRE_MIN_JAR_FILENAME = "otre_min.jar"; //$NON-NLS-1$
	private static final String OTRE_AGENT_JAR_FILENAME = "otre_agent.jar"; //$NON-NLS-1$
	private static final String OTDRE_AGENT_JAR_FILENAME = "otredyn_agent.jar"; //$NON-NLS-1$

	private static final String OTRE_PLUGIN_NAME = "org.eclipse.objectteams.otre";
	private static final String OTDRE_PLUGIN_NAME = "org.eclipse.objectteams.otredyn";

	// data for initializing the above BYTECODE_LIBRARY_PATH:
	private static final String BCEL_BUNDLE_NAME = "org.apache.bcel"; //$NON-NLS-1$
	private static final String BCEL_VERSION_RANGE = "[5.2.0,5.3.0)"; //$NON-NLS-1$

	// data for initializing the ASM_PATH:
	private static final String[] ASM_BUNDLE_NAMES = { "org.objectweb.asm", "org.objectweb.asm.tree", "org.objectweb.asm.commons", "org.objectweb.asm.util", "org.objectweb.asm.analysis" }; //$NON-NLS-1$
	private static final String ASM_VERSION_RANGE = "[5.0.1,7.2.0)"; //$NON-NLS-1$


	private IClasspathEntry[] _cpEntries;

	/**
	* Return a an array of classpath entry representing the OTRE.
	* @return a singleton array.
	*/
	public IClasspathEntry[] getClasspathEntries()
	{
	if (_cpEntries == null)
	{
	IPath fullPath = new Path(OTVariableInitializer.getInstallatedPath(OTDTPlugin.getDefault(), OT_RUNTIME_PLUGIN, "bin")); //$NON-NLS-1$
	_cpEntries = new IClasspathEntry[] {JavaCore.newLibraryEntry(fullPath, fullPath, new Path("/"))}; //$NON-NLS-1$
	}

	return _cpEntries;
	}

	/** Answer the text that describes the OTRE container in the UI. */
	public String getDescription()
	{
	return OTCoreExtMessages.OTREContainer__Description;
	}

	/**
	* Answer the kind of this classpath container, value = {@link IClasspathContainer#K_APPLICATION}.
	*/
	public int getKind()
	{
	// don't mark as K_SYSTEM or K_SYSTEM_DEFAULT, which would prevent jdt.debug from adding this to the runtime classpath.
	return IClasspathContainer.K_APPLICATION;
	}

	/**
	* The name of this classpath container as a path, value = "OTRE".
	*/
	public IPath getPath()
	{
	return OTRE_CONTAINER_PATH;
	}

	/**
	* Answer the path of the "otre_min.jar" archive, which is placed on the bootclasspath when running OT/J programs.
	* @return resolved path
	*/
	public static IPath getOtreMinJarPath () {
	if (OTRE_MIN_JAR_PATH == null)
	OTRE_MIN_JAR_PATH = OTDTPlugin.getResolvedVariablePath(OTDTPlugin.OTDT_INSTALLDIR, "lib/"+OTRE_MIN_JAR_FILENAME); //$NON-NLS-1$
	return OTRE_MIN_JAR_PATH;
	}

	/**
	* Answer the path of the "otre_agent.jar" archive, which is passed as a -javaagent to the JVM.
	* @return resolved path
	*/
	public static IPath getOtreAgentJarPath(WeavingScheme scheme) {
	switch (scheme) {
	case OTRE:
	if (OTRE_AGENT_JAR_PATH == null)
	OTRE_AGENT_JAR_PATH = OTDTPlugin.getResolvedVariablePath(OTDTPlugin.OTDT_INSTALLDIR, "lib/"+OTRE_AGENT_JAR_FILENAME); //$NON-NLS-1$
	return OTRE_AGENT_JAR_PATH;
	case OTDRE:
	if (OTDRE_AGENT_JAR_PATH == null)
	OTDRE_AGENT_JAR_PATH = OTDTPlugin.getResolvedVariablePath(OTDTPlugin.OTDT_INSTALLDIR, "lib/"+OTDRE_AGENT_JAR_FILENAME); //$NON-NLS-1$
	return OTDRE_AGENT_JAR_PATH;
	default:
	throw new IncompatibleClassChangeError("Unexpected enum constant "+scheme);
	}
	}

	/**
	* Answer the path of the "otequinoxAgent.jar" archive, which is passed as a -javaagent to the JVM for OT/Equinox debug launches.
	* @return resolved path
	*/
	public static IPath getOtequinoxAgentJarPath() {
	return new Path(TransformerPlugin.getOtequinoxAgentPath());
	}

	/**
	* Adds the ObjectTeams classes to the given JavaProject's classpath,
	* and ensures the Java compliance is >= 1.5
	* Handles both variants, OTRE and OTDRE.
	*/
	public static void initializeOTJProject(IProject project) throws CoreException
	{
	if (project == null)
	{
	return;
	}

	if (project.hasNature(JavaCore.NATURE_ID))
	{
	IJavaProject javaPrj = (IJavaProject) project.getNature(JavaCore.NATURE_ID);
	IClasspathEntry[] classpath = javaPrj.getRawClasspath();

	if (!isOTREAlreadyInClasspath(classpath))
	{
	addOTREToClasspath(javaPrj, classpath);
	}
	String javaVersion = javaPrj.getOption(JavaCore.COMPILER_COMPLIANCE, true);
	if (javaVersion.compareTo(JavaCore.VERSION_1_5)<0) {
	javaPrj.setOption(JavaCore.COMPILER_COMPLIANCE, JavaCore.VERSION_1_5);
	javaPrj.setOption(JavaCore.COMPILER_SOURCE, JavaCore.VERSION_1_5);
	javaPrj.setOption(JavaCore.COMPILER_CODEGEN_TARGET_PLATFORM, JavaCore.VERSION_1_5);
	javaPrj.setOption(JavaCore.COMPILER_PB_ASSERT_IDENTIFIER, JavaCore.ERROR);
	javaPrj.setOption(JavaCore.COMPILER_PB_ENUM_IDENTIFIER, JavaCore.ERROR);
	javaPrj.setOption(JavaCore.COMPILER_CODEGEN_INLINE_JSR_BYTECODE, JavaCore.ENABLED);
	}
	}
	}

	private static boolean isOTREAlreadyInClasspath(IClasspathEntry[] classpath) {
	for (int idx = 0; classpath != null && idx < classpath.length; idx++) {
	IClasspathEntry entry = classpath[idx];
	if (entry.getEntryKind() == IClasspathEntry.CPE_CONTAINER &&
	(entry.getPath().equals(OTRE_CONTAINER_PATH)))
	return true;
	}

	return false;
	}

	public static IPath getContainerPath() {
	return OTRE_CONTAINER_PATH;
	}

	public static IPath[] getWeaverPaths(WeavingScheme scheme) {
	return BYTECODE_WEAVER_PATHS[scheme.ordinal()];
	}

	/**
	* Add the object teams foundation classes to the classpath.
	*/
	private static void addOTREToClasspath(IJavaProject javaPrj, IClasspathEntry[] classpath)
	throws JavaModelException, CoreException
	{
	IClasspathEntry[] newClasspath = new IClasspathEntry[classpath.length + 1];

	System.arraycopy( classpath, 0, newClasspath, 0, classpath.length );

	newClasspath[classpath.length] = JavaCore.newContainerEntry(OTRE_CONTAINER_PATH, false);

	if (newClasspath[classpath.length] != null)
	javaPrj.setRawClasspath( newClasspath, null );
	else
	throw new CoreException( new Status(
	IStatus.ERROR,
	OTDTPlugin.PLUGIN_ID,
	IStatus.OK,
	OTCoreExtMessages.OTREContainer_otre_not_found,
	null) );
	}

	/** Fetch the location of the otre, otdre, bcel and asm bundles into {@link #BYTECODE_WEAVER_PATHS}. */
	@SuppressWarnings("deprecation") // class PackageAdmin is "deprecated"
	static void findBytecodeLibs(BundleContext context) throws IOException {
	ServiceReference<org.osgi.service.packageadmin.PackageAdmin> ref =
	(ServiceReference<org.osgi.service.packageadmin.PackageAdmin>) context.getServiceReference(org.osgi.service.packageadmin.PackageAdmin.class);
	if (ref == null)
	throw new IllegalStateException("Cannot connect to PackageAdmin"); //$NON-NLS-1$
	org.osgi.service.packageadmin.PackageAdmin packageAdmin = context.getService(ref);
	BCEL: {
	String bundleName = BCEL_BUNDLE_NAME;
	String bundleVersionRange = BCEL_VERSION_RANGE;
	for (Bundle bundle : packageAdmin.getBundles(bundleName, bundleVersionRange)) {
	BYTECODE_WEAVER_PATHS[WeavingScheme.OTRE.ordinal()] =
	new IPath[] {
	new Path(FileLocator.toFileURL(bundle.getEntry("/")).getFile()), //$NON-NLS-1$
	new Path(OTVariableInitializer.getInstallatedPath(OTDTPlugin.getDefault(), OTRE_PLUGIN_NAME, "bin")) //$NON-NLS-1$
	};
	break BCEL;
	}
	throw new RuntimeException("bytecode libarary for OTRE not found"); //$NON-NLS-1$
	}
	ASM : {
	int asm = WeavingScheme.OTDRE.ordinal();
	int numBundles = ASM_BUNDLE_NAMES.length+1;
	BYTECODE_WEAVER_PATHS[asm] = new IPath[numBundles];
	int i = 0;
	BYTECODE_WEAVER_PATHS[asm][i++] = new Path(OTVariableInitializer.getInstallatedPath(OTDTPlugin.getDefault(), OTDRE_PLUGIN_NAME, "bin")); //$NON-NLS-1$
	for (String bundleName : ASM_BUNDLE_NAMES) {
	for (Bundle bundle : packageAdmin.getBundles(bundleName, ASM_VERSION_RANGE)) {
	URL bundleEntry = bundle.getEntry("bin"); // source project?
	if (bundleEntry == null)
	bundleEntry = bundle.getEntry("/"); // binary bundle
	BYTECODE_WEAVER_PATHS[asm][i++] = new Path(FileLocator.toFileURL(bundleEntry).getFile()); //$NON-NLS-1$
	break;
	}
	}
	if (i == numBundles)
	break ASM;
	throw new RuntimeException("bytecode libarary for OTDRE not found"); //$NON-NLS-1$
	}
	}

	}