subsystem/subsystem-itests/src/test/java/org/apache/aries/subsystem/itests/DynamicImportTest.java - aries - Git at Google

 package org.apache.aries.subsystem.itests;

 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;

 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.atomic.AtomicBoolean;

 import org.apache.aries.itest.RichBundleContext;
 import org.apache.aries.subsystem.itests.hello.api.Hello;
 import org.apache.aries.unittest.fixture.ArchiveFixture;
 import org.apache.aries.unittest.fixture.ArchiveFixture.JarFixture;
 import org.apache.aries.unittest.fixture.ArchiveFixture.ManifestFixture;
 import org.junit.Test;
 import org.ops4j.pax.exam.spi.reactors.ExamReactorStrategy;
 import org.ops4j.pax.exam.spi.reactors.PerMethod;
 import org.osgi.framework.Bundle;
 import org.osgi.framework.BundleContext;
 import org.osgi.framework.BundleException;
 import org.osgi.framework.Constants;
 import org.osgi.framework.ServiceRegistration;
 import org.osgi.framework.hooks.weaving.WeavingHook;
 import org.osgi.framework.hooks.weaving.WovenClass;
 import org.osgi.service.subsystem.Subsystem;
 import org.osgi.service.subsystem.SubsystemConstants;
 import org.osgi.service.subsystem.SubsystemException;

 /*
  * Simple iTest for dynamic imports. In the first instance we'll use a
  * DynamicImport-Package header because it's the simplest to set up.
  * _Hopefully_ if this works, then packages added by WeavingProxy services
  * will also work. If not, we'll need extra tests :-/
  */
 @ExamReactorStrategy(PerMethod.class)
 public class DynamicImportTest extends SubsystemTest
 {
 	@Override
 	protected void createApplications() throws Exception {
 		createApplication("dynamicImport", "dynamicImport.jar");
 		createEmptyClass();
 		createBundleA();
 		createApplicationA();
 	}

 	/*
 	 * Install an .esa containing a bundle with a BundleActivator, and a
 	 * DynamicImport-Package on org.apache.aries.subsystem.itests.hello.api.
 	 * This app should fail to start because we've not yet intervened to permit
 	 * this dynamic package wiring requirement from being met.
 	 */
 	@Test
 	public void verifyThatDynamicImportNeedsHandling() throws Exception
 	{
 		Subsystem subsystem = installSubsystemFromFile ("dynamicImport.esa");
 		try {
 			startSubsystem(subsystem);
 			Bundle[] bundles = subsystem.getBundleContext().getBundles();
 			for (Bundle b : bundles) {
 				System.out.println (b.getSymbolicName() + " -> " + b.getState());
 			}
 			fail ("dynamicImport.esa started when we didn't expect it to");
 		} catch (SubsystemException sx) {
 			Throwable cause = sx.getCause();
 			assertTrue("BundleException expected", cause instanceof BundleException);
 		}
 	}

 	class TokenWeaver implements WeavingHook {
 		@Override
 		public void weave(WovenClass arg0) {
 			if ("org.apache.aries.subsystem.itests.dynamicImport".equals(arg0.getBundleWiring().getBundle().getSymbolicName())) {
 				arg0.getDynamicImports().add("org.apache.aries.subsystem.itests.hello.api");
 			}
 		}
 	}

 	@SuppressWarnings("rawtypes")
     @Test
 	public void testFirstPassWeavingApproach() throws Exception
 	{
 		ServiceRegistration<?> sr = bundleContext.registerService(WeavingHook.class, new TokenWeaver(), null);
 		try {
 			Subsystem subsystem = installSubsystemFromFile ("dynamicImport.esa");
 			startSubsystem(subsystem);

 			BundleContext bc = subsystem.getBundleContext();
 			Hello h = new RichBundleContext(bc).getService(Hello.class);
 			String message = h.saySomething();
 			assertEquals ("Wrong message back", "Hello, this is something", message); // DynamicImportHelloImpl.java

 			stopSubsystem(subsystem);
 			uninstallSubsystem(subsystem);
 		} finally {
 			sr.unregister();
 		}
 	}

 	/*
 	 * Subsystem-SymbolicName: application.a.esa
 	 * Subsystem-Content: bundle.a.jar
 	 */
 	private static final String APPLICATION_A = "application.a.esa";
 	/*
 	 * Bundle-SymbolicName: bundle.a.jar
 	 */
 	private static final String BUNDLE_A = "bundle.a.jar";

 	private static void createApplicationA() throws IOException {
 		createApplicationAManifest();
 		createSubsystem(APPLICATION_A, BUNDLE_A);
 	}

 	private static void createApplicationAManifest() throws IOException {
 		Map<String, String> attributes = new HashMap<String, String>();
 		attributes.put(SubsystemConstants.SUBSYSTEM_SYMBOLICNAME, APPLICATION_A);
 		createManifest(APPLICATION_A + ".mf", attributes);
 	}

 	private static void createBundleA() throws IOException {
 		JarFixture bundle = ArchiveFixture.newJar();
 		bundle.binary("Empty.class", new FileInputStream("Empty.class"));
 		ManifestFixture manifest = bundle.manifest();
 		manifest.attribute(Constants.BUNDLE_SYMBOLICNAME, BUNDLE_A);
 		write(BUNDLE_A, bundle);
 	}

 	/*
 	 * Dynamic package imports added by a weaver to a woven class should be
 	 * added to the region's sharing policy even if the subsystem has no
 	 * Import-Package header.
 	 */
 	@SuppressWarnings("rawtypes")
     @Test
 	public void testDynamicPackageImportsAddedToSharingPolicyWhenNoImportPackageHeader() throws Exception {
 		final AtomicBoolean weavingHookCalled = new AtomicBoolean(false);
 		ServiceRegistration reg = bundleContext.registerService(
 				WeavingHook.class,
 				new WeavingHook() {
 					@Override
 					public void weave(WovenClass wovenClass) {
 						if (BUNDLE_A.equals(wovenClass.getBundleWiring().getBundle().getSymbolicName())) {
 							wovenClass.getDynamicImports().add("org.osgi.framework");
 							weavingHookCalled.set(true);
 						}
 					}
 				},
 				null);
 		try {
 			Subsystem s = installSubsystemFromFile(APPLICATION_A);
 			try {
 				assertNull("Import-Package header should not exist", s.getSubsystemHeaders(null).get(Constants.IMPORT_PACKAGE));
 				Bundle a = getConstituentAsBundle(s, BUNDLE_A, null, null);
 				// Force the class load so the weaving hook gets called.
 				a.loadClass("Empty");
 				assertTrue("Weaving hook not called", weavingHookCalled.get());
 				try {
 					// Try to load a class from the dynamically imported package.
 					a.loadClass("org.osgi.framework.Bundle");
 				}
 				catch (Exception e) {
 					fail("Woven dynamic package import not added to the region's sharing policy");
 				}
 			}
 			finally {
 				try {
 					s.uninstall();
 				}
 				catch (Exception e) {}
 			}
 		}
 		finally {
 			try {
 				reg.unregister();
 			}
 			catch (Exception e) {}
 		}
 	}

 	protected static final byte[] EMPTY_CLASS = new byte[] {
 	     (byte)0xca, (byte)0xfe, (byte)0xba, (byte)0xbe,
 	     (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x32,
 	     (byte)0x00, (byte)0x12, (byte)0x07, (byte)0x00,
 	     (byte)0x02, (byte)0x01, (byte)0x00, (byte)0x05,
 	     (byte)0x45, (byte)0x6d, (byte)0x70, (byte)0x74,
 	     (byte)0x79, (byte)0x07, (byte)0x00, (byte)0x04,
 	     (byte)0x01, (byte)0x00, (byte)0x10, (byte)0x6a,
 	     (byte)0x61, (byte)0x76, (byte)0x61, (byte)0x2f,
 	     (byte)0x6c, (byte)0x61, (byte)0x6e, (byte)0x67,
 	     (byte)0x2f, (byte)0x4f, (byte)0x62, (byte)0x6a,
 	     (byte)0x65, (byte)0x63, (byte)0x74, (byte)0x07,
 	     (byte)0x00, (byte)0x06, (byte)0x01, (byte)0x00,
 	     (byte)0x14, (byte)0x6a, (byte)0x61, (byte)0x76,
 	     (byte)0x61, (byte)0x2f, (byte)0x69, (byte)0x6f,
 	     (byte)0x2f, (byte)0x53, (byte)0x65, (byte)0x72,
 	     (byte)0x69, (byte)0x61, (byte)0x6c, (byte)0x69,
 	     (byte)0x7a, (byte)0x61, (byte)0x62, (byte)0x6c,
 	     (byte)0x65, (byte)0x01, (byte)0x00, (byte)0x06,
 	     (byte)0x3c, (byte)0x69, (byte)0x6e, (byte)0x69,
 	     (byte)0x74, (byte)0x3e, (byte)0x01, (byte)0x00,
 	     (byte)0x03, (byte)0x28, (byte)0x29, (byte)0x56,
 	     (byte)0x01, (byte)0x00, (byte)0x04, (byte)0x43,
 	     (byte)0x6f, (byte)0x64, (byte)0x65, (byte)0x0a,
 	     (byte)0x00, (byte)0x03, (byte)0x00, (byte)0x0b,
 	     (byte)0x0c, (byte)0x00, (byte)0x07, (byte)0x00,
 	     (byte)0x08, (byte)0x01, (byte)0x00, (byte)0x0f,
 	     (byte)0x4c, (byte)0x69, (byte)0x6e, (byte)0x65,
 	     (byte)0x4e, (byte)0x75, (byte)0x6d, (byte)0x62,
 	     (byte)0x65, (byte)0x72, (byte)0x54, (byte)0x61,
 	     (byte)0x62, (byte)0x6c, (byte)0x65, (byte)0x01,
 	     (byte)0x00, (byte)0x12, (byte)0x4c, (byte)0x6f,
 	     (byte)0x63, (byte)0x61, (byte)0x6c, (byte)0x56,
 	     (byte)0x61, (byte)0x72, (byte)0x69, (byte)0x61,
 	     (byte)0x62, (byte)0x6c, (byte)0x65, (byte)0x54,
 	     (byte)0x61, (byte)0x62, (byte)0x6c, (byte)0x65,
 	     (byte)0x01, (byte)0x00, (byte)0x04, (byte)0x74,
 	     (byte)0x68, (byte)0x69, (byte)0x73, (byte)0x01,
 	     (byte)0x00, (byte)0x07, (byte)0x4c, (byte)0x45,
 	     (byte)0x6d, (byte)0x70, (byte)0x74, (byte)0x79,
 	     (byte)0x3b, (byte)0x01, (byte)0x00, (byte)0x0a,
 	     (byte)0x53, (byte)0x6f, (byte)0x75, (byte)0x72,
 	     (byte)0x63, (byte)0x65, (byte)0x46, (byte)0x69,
 	     (byte)0x6c, (byte)0x65, (byte)0x01, (byte)0x00,
 	     (byte)0x0a, (byte)0x45, (byte)0x6d, (byte)0x70,
 	     (byte)0x74, (byte)0x79, (byte)0x2e, (byte)0x6a,
 	     (byte)0x61, (byte)0x76, (byte)0x61, (byte)0x00,
 	     (byte)0x21, (byte)0x00, (byte)0x01, (byte)0x00,
 	     (byte)0x03, (byte)0x00, (byte)0x01, (byte)0x00,
 	     (byte)0x05, (byte)0x00, (byte)0x00, (byte)0x00,
 	     (byte)0x01, (byte)0x00, (byte)0x01, (byte)0x00,
 	     (byte)0x07, (byte)0x00, (byte)0x08, (byte)0x00,
 	     (byte)0x01, (byte)0x00, (byte)0x09, (byte)0x00,
 	     (byte)0x00, (byte)0x00, (byte)0x2f, (byte)0x00,
 	     (byte)0x01, (byte)0x00, (byte)0x01, (byte)0x00,
 	     (byte)0x00, (byte)0x00, (byte)0x05, (byte)0x2a,
 	     (byte)0xb7, (byte)0x00, (byte)0x0a, (byte)0xb1,
 	     (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x02,
 	     (byte)0x00, (byte)0x0c, (byte)0x00, (byte)0x00,
 	     (byte)0x00, (byte)0x06, (byte)0x00, (byte)0x01,
 	     (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x04,
 	     (byte)0x00, (byte)0x0d, (byte)0x00, (byte)0x00,
 	     (byte)0x00, (byte)0x0c, (byte)0x00, (byte)0x01,
 	     (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x05,
 	     (byte)0x00, (byte)0x0e, (byte)0x00, (byte)0x0f,
 	     (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x01,
 	     (byte)0x00, (byte)0x10, (byte)0x00, (byte)0x00,
 	     (byte)0x00, (byte)0x02, (byte)0x00, (byte)0x11
 	};

 	protected static void createEmptyClass() throws IOException {
 	    FileOutputStream fos = new FileOutputStream("Empty.class");
 	    fos.write(EMPTY_CLASS);
 	    fos.close();
 	}
 }
	package org.apache.aries.subsystem.itests;

	import static org.junit.Assert.assertEquals;
	import static org.junit.Assert.assertNull;
	import static org.junit.Assert.assertTrue;
	import static org.junit.Assert.fail;

	import java.io.FileInputStream;
	import java.io.FileOutputStream;
	import java.io.IOException;
	import java.util.HashMap;
	import java.util.Map;
	import java.util.concurrent.atomic.AtomicBoolean;

	import org.apache.aries.itest.RichBundleContext;
	import org.apache.aries.subsystem.itests.hello.api.Hello;
	import org.apache.aries.unittest.fixture.ArchiveFixture;
	import org.apache.aries.unittest.fixture.ArchiveFixture.JarFixture;
	import org.apache.aries.unittest.fixture.ArchiveFixture.ManifestFixture;
	import org.junit.Test;
	import org.ops4j.pax.exam.spi.reactors.ExamReactorStrategy;
	import org.ops4j.pax.exam.spi.reactors.PerMethod;
	import org.osgi.framework.Bundle;
	import org.osgi.framework.BundleContext;
	import org.osgi.framework.BundleException;
	import org.osgi.framework.Constants;
	import org.osgi.framework.ServiceRegistration;
	import org.osgi.framework.hooks.weaving.WeavingHook;
	import org.osgi.framework.hooks.weaving.WovenClass;
	import org.osgi.service.subsystem.Subsystem;
	import org.osgi.service.subsystem.SubsystemConstants;
	import org.osgi.service.subsystem.SubsystemException;

	/*
	* Simple iTest for dynamic imports. In the first instance we'll use a
	* DynamicImport-Package header because it's the simplest to set up.
	* _Hopefully_ if this works, then packages added by WeavingProxy services
	* will also work. If not, we'll need extra tests :-/
	*/
	@ExamReactorStrategy(PerMethod.class)
	public class DynamicImportTest extends SubsystemTest
	{
	@Override
	protected void createApplications() throws Exception {
	createApplication("dynamicImport", "dynamicImport.jar");
	createEmptyClass();
	createBundleA();
	createApplicationA();
	}

	/*
	* Install an .esa containing a bundle with a BundleActivator, and a
	* DynamicImport-Package on org.apache.aries.subsystem.itests.hello.api.
	* This app should fail to start because we've not yet intervened to permit
	* this dynamic package wiring requirement from being met.
	*/
	@Test
	public void verifyThatDynamicImportNeedsHandling() throws Exception
	{
	Subsystem subsystem = installSubsystemFromFile ("dynamicImport.esa");
	try {
	startSubsystem(subsystem);
	Bundle[] bundles = subsystem.getBundleContext().getBundles();
	for (Bundle b : bundles) {
	System.out.println (b.getSymbolicName() + " -> " + b.getState());
	}
	fail ("dynamicImport.esa started when we didn't expect it to");
	} catch (SubsystemException sx) {
	Throwable cause = sx.getCause();
	assertTrue("BundleException expected", cause instanceof BundleException);
	}
	}

	class TokenWeaver implements WeavingHook {
	@Override
	public void weave(WovenClass arg0) {
	if ("org.apache.aries.subsystem.itests.dynamicImport".equals(arg0.getBundleWiring().getBundle().getSymbolicName())) {
	arg0.getDynamicImports().add("org.apache.aries.subsystem.itests.hello.api");
	}
	}
	}

	@SuppressWarnings("rawtypes")
	@Test
	public void testFirstPassWeavingApproach() throws Exception
	{
	ServiceRegistration<?> sr = bundleContext.registerService(WeavingHook.class, new TokenWeaver(), null);
	try {
	Subsystem subsystem = installSubsystemFromFile ("dynamicImport.esa");
	startSubsystem(subsystem);

	BundleContext bc = subsystem.getBundleContext();
	Hello h = new RichBundleContext(bc).getService(Hello.class);
	String message = h.saySomething();
	assertEquals ("Wrong message back", "Hello, this is something", message); // DynamicImportHelloImpl.java

	stopSubsystem(subsystem);
	uninstallSubsystem(subsystem);
	} finally {
	sr.unregister();
	}
	}

	/*
	* Subsystem-SymbolicName: application.a.esa
	* Subsystem-Content: bundle.a.jar
	*/
	private static final String APPLICATION_A = "application.a.esa";
	/*
	* Bundle-SymbolicName: bundle.a.jar
	*/
	private static final String BUNDLE_A = "bundle.a.jar";

	private static void createApplicationA() throws IOException {
	createApplicationAManifest();
	createSubsystem(APPLICATION_A, BUNDLE_A);
	}

	private static void createApplicationAManifest() throws IOException {
	Map<String, String> attributes = new HashMap<String, String>();
	attributes.put(SubsystemConstants.SUBSYSTEM_SYMBOLICNAME, APPLICATION_A);
	createManifest(APPLICATION_A + ".mf", attributes);
	}

	private static void createBundleA() throws IOException {
	JarFixture bundle = ArchiveFixture.newJar();
	bundle.binary("Empty.class", new FileInputStream("Empty.class"));
	ManifestFixture manifest = bundle.manifest();
	manifest.attribute(Constants.BUNDLE_SYMBOLICNAME, BUNDLE_A);
	write(BUNDLE_A, bundle);
	}

	/*
	* Dynamic package imports added by a weaver to a woven class should be
	* added to the region's sharing policy even if the subsystem has no
	* Import-Package header.
	*/
	@SuppressWarnings("rawtypes")
	@Test
	public void testDynamicPackageImportsAddedToSharingPolicyWhenNoImportPackageHeader() throws Exception {
	final AtomicBoolean weavingHookCalled = new AtomicBoolean(false);
	ServiceRegistration reg = bundleContext.registerService(
	WeavingHook.class,
	new WeavingHook() {
	@Override
	public void weave(WovenClass wovenClass) {
	if (BUNDLE_A.equals(wovenClass.getBundleWiring().getBundle().getSymbolicName())) {
	wovenClass.getDynamicImports().add("org.osgi.framework");
	weavingHookCalled.set(true);
	}
	}
	},
	null);
	try {
	Subsystem s = installSubsystemFromFile(APPLICATION_A);
	try {
	assertNull("Import-Package header should not exist", s.getSubsystemHeaders(null).get(Constants.IMPORT_PACKAGE));
	Bundle a = getConstituentAsBundle(s, BUNDLE_A, null, null);
	// Force the class load so the weaving hook gets called.
	a.loadClass("Empty");
	assertTrue("Weaving hook not called", weavingHookCalled.get());
	try {
	// Try to load a class from the dynamically imported package.
	a.loadClass("org.osgi.framework.Bundle");
	}
	catch (Exception e) {
	fail("Woven dynamic package import not added to the region's sharing policy");
	}
	}
	finally {
	try {
	s.uninstall();
	}
	catch (Exception e) {}
	}
	}
	finally {
	try {
	reg.unregister();
	}
	catch (Exception e) {}
	}
	}

	protected static final byte[] EMPTY_CLASS = new byte[] {
	(byte)0xca, (byte)0xfe, (byte)0xba, (byte)0xbe,
	(byte)0x00, (byte)0x00, (byte)0x00, (byte)0x32,
	(byte)0x00, (byte)0x12, (byte)0x07, (byte)0x00,
	(byte)0x02, (byte)0x01, (byte)0x00, (byte)0x05,
	(byte)0x45, (byte)0x6d, (byte)0x70, (byte)0x74,
	(byte)0x79, (byte)0x07, (byte)0x00, (byte)0x04,
	(byte)0x01, (byte)0x00, (byte)0x10, (byte)0x6a,
	(byte)0x61, (byte)0x76, (byte)0x61, (byte)0x2f,
	(byte)0x6c, (byte)0x61, (byte)0x6e, (byte)0x67,
	(byte)0x2f, (byte)0x4f, (byte)0x62, (byte)0x6a,
	(byte)0x65, (byte)0x63, (byte)0x74, (byte)0x07,
	(byte)0x00, (byte)0x06, (byte)0x01, (byte)0x00,
	(byte)0x14, (byte)0x6a, (byte)0x61, (byte)0x76,
	(byte)0x61, (byte)0x2f, (byte)0x69, (byte)0x6f,
	(byte)0x2f, (byte)0x53, (byte)0x65, (byte)0x72,
	(byte)0x69, (byte)0x61, (byte)0x6c, (byte)0x69,
	(byte)0x7a, (byte)0x61, (byte)0x62, (byte)0x6c,
	(byte)0x65, (byte)0x01, (byte)0x00, (byte)0x06,
	(byte)0x3c, (byte)0x69, (byte)0x6e, (byte)0x69,
	(byte)0x74, (byte)0x3e, (byte)0x01, (byte)0x00,
	(byte)0x03, (byte)0x28, (byte)0x29, (byte)0x56,
	(byte)0x01, (byte)0x00, (byte)0x04, (byte)0x43,
	(byte)0x6f, (byte)0x64, (byte)0x65, (byte)0x0a,
	(byte)0x00, (byte)0x03, (byte)0x00, (byte)0x0b,
	(byte)0x0c, (byte)0x00, (byte)0x07, (byte)0x00,
	(byte)0x08, (byte)0x01, (byte)0x00, (byte)0x0f,
	(byte)0x4c, (byte)0x69, (byte)0x6e, (byte)0x65,
	(byte)0x4e, (byte)0x75, (byte)0x6d, (byte)0x62,
	(byte)0x65, (byte)0x72, (byte)0x54, (byte)0x61,
	(byte)0x62, (byte)0x6c, (byte)0x65, (byte)0x01,
	(byte)0x00, (byte)0x12, (byte)0x4c, (byte)0x6f,
	(byte)0x63, (byte)0x61, (byte)0x6c, (byte)0x56,
	(byte)0x61, (byte)0x72, (byte)0x69, (byte)0x61,
	(byte)0x62, (byte)0x6c, (byte)0x65, (byte)0x54,
	(byte)0x61, (byte)0x62, (byte)0x6c, (byte)0x65,
	(byte)0x01, (byte)0x00, (byte)0x04, (byte)0x74,
	(byte)0x68, (byte)0x69, (byte)0x73, (byte)0x01,
	(byte)0x00, (byte)0x07, (byte)0x4c, (byte)0x45,
	(byte)0x6d, (byte)0x70, (byte)0x74, (byte)0x79,
	(byte)0x3b, (byte)0x01, (byte)0x00, (byte)0x0a,
	(byte)0x53, (byte)0x6f, (byte)0x75, (byte)0x72,
	(byte)0x63, (byte)0x65, (byte)0x46, (byte)0x69,
	(byte)0x6c, (byte)0x65, (byte)0x01, (byte)0x00,
	(byte)0x0a, (byte)0x45, (byte)0x6d, (byte)0x70,
	(byte)0x74, (byte)0x79, (byte)0x2e, (byte)0x6a,
	(byte)0x61, (byte)0x76, (byte)0x61, (byte)0x00,
	(byte)0x21, (byte)0x00, (byte)0x01, (byte)0x00,
	(byte)0x03, (byte)0x00, (byte)0x01, (byte)0x00,
	(byte)0x05, (byte)0x00, (byte)0x00, (byte)0x00,
	(byte)0x01, (byte)0x00, (byte)0x01, (byte)0x00,
	(byte)0x07, (byte)0x00, (byte)0x08, (byte)0x00,
	(byte)0x01, (byte)0x00, (byte)0x09, (byte)0x00,
	(byte)0x00, (byte)0x00, (byte)0x2f, (byte)0x00,
	(byte)0x01, (byte)0x00, (byte)0x01, (byte)0x00,
	(byte)0x00, (byte)0x00, (byte)0x05, (byte)0x2a,
	(byte)0xb7, (byte)0x00, (byte)0x0a, (byte)0xb1,
	(byte)0x00, (byte)0x00, (byte)0x00, (byte)0x02,
	(byte)0x00, (byte)0x0c, (byte)0x00, (byte)0x00,
	(byte)0x00, (byte)0x06, (byte)0x00, (byte)0x01,
	(byte)0x00, (byte)0x00, (byte)0x00, (byte)0x04,
	(byte)0x00, (byte)0x0d, (byte)0x00, (byte)0x00,
	(byte)0x00, (byte)0x0c, (byte)0x00, (byte)0x01,
	(byte)0x00, (byte)0x00, (byte)0x00, (byte)0x05,
	(byte)0x00, (byte)0x0e, (byte)0x00, (byte)0x0f,
	(byte)0x00, (byte)0x00, (byte)0x00, (byte)0x01,
	(byte)0x00, (byte)0x10, (byte)0x00, (byte)0x00,
	(byte)0x00, (byte)0x02, (byte)0x00, (byte)0x11
	};

	protected static void createEmptyClass() throws IOException {
	FileOutputStream fos = new FileOutputStream("Empty.class");
	fos.write(EMPTY_CLASS);
	fos.close();
	}
	}