bundles/org.eclipse.osgi/container/src/org/eclipse/osgi/internal/hookregistry/HookRegistry.java - equinox/rt.equinox.framework - Git at Google

 /*******************************************************************************
  * Copyright (c) 2005, 2016 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/

 package org.eclipse.osgi.internal.hookregistry;

 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URL;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Enumeration;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Properties;
 import org.eclipse.osgi.framework.log.FrameworkLogEntry;
 import org.eclipse.osgi.internal.cds.CDSHookConfigurator;
 import org.eclipse.osgi.internal.framework.EquinoxConfiguration;
 import org.eclipse.osgi.internal.framework.EquinoxContainer;
 import org.eclipse.osgi.internal.hooks.DevClassLoadingHook;
 import org.eclipse.osgi.internal.hooks.EclipseLazyStarter;
 import org.eclipse.osgi.internal.signedcontent.SignedBundleHook;
 import org.eclipse.osgi.internal.weaving.WeavingHookConfigurator;
 import org.eclipse.osgi.util.ManifestElement;

 /**
  * The hook registry is used to store all the hooks which are
  * configured by the hook configurators.
  * @see HookConfigurator
  */
 public final class HookRegistry {
 	/**
 	 * The hook configurators properties file (&quot;hookconfigurators.properties&quot;) <p>
 	 * A framework extension may supply a hook configurators properties file to specify a
 	 * list of hook configurators.
 	 * @see #HOOK_CONFIGURATORS
 	 */
 	public static final String HOOK_CONFIGURATORS_FILE = "hookconfigurators.properties"; //$NON-NLS-1$

 	/**
 	 * The hook configurators property key (&quot;hookconfigurators.properties&quot;) used in
 	 * a hook configurators properties file to specify a comma separated list of fully
 	 * qualified hook configurator classes.
 	 */
 	public static final String HOOK_CONFIGURATORS = "hook.configurators"; //$NON-NLS-1$

 	/**
 	 * A system property (&quot;osgi.hook.configurators.include&quot;) used to add additional
 	 * hook configurators.  This is helpful for configuring optional hook configurators.
 	 */
 	public static final String PROP_HOOK_CONFIGURATORS_INCLUDE = "osgi.hook.configurators.include"; //$NON-NLS-1$

 	/**
 	 * A system property (&quot;osgi.hook.configurators.exclude&quot;) used to exclude
 	 * any hook configurators.  This is helpful for disabling hook
 	 * configurators that is specified in hook configurator properties files.
 	 */
 	public static final String PROP_HOOK_CONFIGURATORS_EXCLUDE = "osgi.hook.configurators.exclude"; //$NON-NLS-1$

 	/**
 	 * A system property (&quot;osgi.hook.configurators&quot;) used to specify the list
 	 * of hook configurators.  If this property is set then the list of configurators
 	 * specified will be the only configurators used.
 	 */
 	public static final String PROP_HOOK_CONFIGURATORS = "osgi.hook.configurators"; //$NON-NLS-1$

 	private static final String BUILTIN_HOOKS = "builtin.hooks"; //$NON-NLS-1$

 	private final EquinoxContainer container;
 	private volatile boolean initialized = false;
 	private final List<ClassLoaderHook> classLoaderHooks = new ArrayList<>();
 	private final List<ClassLoaderHook> classLoaderHooksRO = Collections.unmodifiableList(classLoaderHooks);
 	private final List<StorageHookFactory<?, ?, ?>> storageHookFactories = new ArrayList<>();
 	private final List<StorageHookFactory<?, ?, ?>> storageHookFactoriesRO = Collections.unmodifiableList(storageHookFactories);
 	private final List<BundleFileWrapperFactoryHook> bundleFileWrapperFactoryHooks = new ArrayList<>();
 	private final List<BundleFileWrapperFactoryHook> bundleFileWrapperFactoryHooksRO = Collections.unmodifiableList(bundleFileWrapperFactoryHooks);
 	private final List<ActivatorHookFactory> activatorHookFactories = new ArrayList<>();
 	private final List<ActivatorHookFactory> activatorHookFactoriesRO = Collections.unmodifiableList(activatorHookFactories);

 	public HookRegistry(EquinoxContainer container) {
 		this.container = container;
 	}

 	/**
 	 * Initializes the hook configurators.  The following steps are used to initialize the hook configurators. <p>
 	 * 1. Get a list of hook configurators from all hook configurators properties files on the classpath,
 	 *    add this list to the overall list of hook configurators, remove duplicates. <p>
 	 * 2. Get a list of hook configurators from the (&quot;osgi.hook.configurators.include&quot;) system property
 	 *    and add this list to the overall list of hook configurators, remove duplicates. <p>
 	 * 3. Get a list of hook configurators from the (&quot;osgi.hook.configurators.exclude&quot;) system property
 	 *    and remove this list from the overall list of hook configurators. <p>
 	 * 4. Load each hook configurator class, create a new instance, then call the {@link HookConfigurator#addHooks(HookRegistry)} method <p>
 	 * 5. Set this HookRegistry object to read only to prevent any other hooks from being added. <p>
 	 */
 	public void initialize() {
 		List<String> configurators = new ArrayList<>(5);
 		List<FrameworkLogEntry> errors = new ArrayList<>(0); // optimistic that no errors will occur
 		mergeFileHookConfigurators(configurators, errors);
 		mergePropertyHookConfigurators(configurators);
 		synchronized (this) {
 			addClassLoaderHook(new DevClassLoadingHook(container.getConfiguration()));
 			addClassLoaderHook(new EclipseLazyStarter(container));
 			addClassLoaderHook(new WeavingHookConfigurator(container));
 			configurators.add(SignedBundleHook.class.getName());
 			configurators.add(CDSHookConfigurator.class.getName());
 			loadConfigurators(configurators, errors);
 			// set to read-only
 			initialized = true;
 		}
 		for (FrameworkLogEntry error : errors) {
 			container.getLogServices().getFrameworkLog().log(error);
 		}
 	}

 	private void mergeFileHookConfigurators(List<String> configuratorList, List<FrameworkLogEntry> errors) {
 		ClassLoader cl = getClass().getClassLoader();
 		// get all hook configurators files in your classloader delegation
 		Enumeration<URL> hookConfigurators;
 		try {
 			hookConfigurators = cl != null ? cl.getResources(HookRegistry.HOOK_CONFIGURATORS_FILE) : ClassLoader.getSystemResources(HookRegistry.HOOK_CONFIGURATORS_FILE);
 		} catch (IOException e) {
 			errors.add(new FrameworkLogEntry(EquinoxContainer.NAME, FrameworkLogEntry.ERROR, 0, "getResources error on " + HookRegistry.HOOK_CONFIGURATORS_FILE, 0, e, null)); //$NON-NLS-1$
 			return;
 		}
 		int curBuiltin = 0;
 		while (hookConfigurators.hasMoreElements()) {
 			URL url = hookConfigurators.nextElement();
 			InputStream input = null;
 			try {
 				// check each file for a hook.configurators property
 				Properties configuratorProps = new Properties();
 				input = url.openStream();
 				configuratorProps.load(input);
 				String hooksValue = configuratorProps.getProperty(HOOK_CONFIGURATORS);
 				if (hooksValue == null)
 					continue;
 				boolean builtin = Boolean.valueOf(configuratorProps.getProperty(BUILTIN_HOOKS)).booleanValue();
 				String[] configurators = ManifestElement.getArrayFromList(hooksValue, ","); //$NON-NLS-1$
 				for (int i = 0; i < configurators.length; i++)
 					if (!configuratorList.contains(configurators[i])) {
 						if (builtin) // make sure the built-in configurators are listed first (bug 170881)
 							configuratorList.add(curBuiltin++, configurators[i]);
 						else
 							configuratorList.add(configurators[i]);
 					}
 			} catch (IOException e) {
 				errors.add(new FrameworkLogEntry(EquinoxContainer.NAME, FrameworkLogEntry.ERROR, 0, "error loading: " + url.toExternalForm(), 0, e, null)); //$NON-NLS-1$
 				// ignore and continue to next URL
 			} finally {
 				if (input != null)
 					try {
 						input.close();
 					} catch (IOException e) {
 						// do nothing
 					}
 			}
 		}
 	}

 	private void mergePropertyHookConfigurators(List<String> configuratorList) {
 		// see if there is a configurators list
 		String[] configurators = ManifestElement.getArrayFromList(container.getConfiguration().getConfiguration(HookRegistry.PROP_HOOK_CONFIGURATORS), ","); //$NON-NLS-1$
 		if (configurators.length > 0) {
 			configuratorList.clear(); // clear the list, we are only going to use the configurators from the list
 			for (int i = 0; i < configurators.length; i++)
 				if (!configuratorList.contains(configurators[i]))
 					configuratorList.add(configurators[i]);
 			return; // don't do anything else
 		}
 		// Make sure the configurators from the include property are in the list
 		String[] includeConfigurators = ManifestElement.getArrayFromList(container.getConfiguration().getConfiguration(HookRegistry.PROP_HOOK_CONFIGURATORS_INCLUDE), ","); //$NON-NLS-1$
 		for (int i = 0; i < includeConfigurators.length; i++)
 			if (!configuratorList.contains(includeConfigurators[i]))
 				configuratorList.add(includeConfigurators[i]);
 		// Make sure the configurators from the exclude property are no in the list
 		String[] excludeHooks = ManifestElement.getArrayFromList(container.getConfiguration().getConfiguration(HookRegistry.PROP_HOOK_CONFIGURATORS_EXCLUDE), ","); //$NON-NLS-1$
 		for (int i = 0; i < excludeHooks.length; i++)
 			configuratorList.remove(excludeHooks[i]);
 	}

 	private void loadConfigurators(List<String> configurators, List<FrameworkLogEntry> errors) {
 		for (Iterator<String> iHooks = configurators.iterator(); iHooks.hasNext();) {
 			String hookName = iHooks.next();
 			try {
 				Class<?> clazz = Class.forName(hookName);
 				HookConfigurator configurator = (HookConfigurator) clazz.newInstance();
 				configurator.addHooks(this);
 			} catch (Throwable t) {
 				// We expect the follow exeptions may happen; but we need to catch all here
 				// ClassNotFoundException
 				// IllegalAccessException
 				// InstantiationException
 				// ClassCastException
 				errors.add(new FrameworkLogEntry(EquinoxContainer.NAME, FrameworkLogEntry.ERROR, 0, "error loading hook: " + hookName, 0, t, null)); //$NON-NLS-1$
 			}
 		}
 	}

 	/**
 	 * Returns the list of configured class loading hooks.
 	 * @return the list of configured class loading hooks.
 	 */
 	public List<ClassLoaderHook> getClassLoaderHooks() {
 		return classLoaderHooksRO;
 	}

 	/**
 	 * Returns the list of configured storage hooks.
 	 * @return the list of configured storage hooks.
 	 */
 	public List<StorageHookFactory<?, ?, ?>> getStorageHookFactories() {
 		return storageHookFactoriesRO;
 	}

 	/**
 	 * Returns the configured bundle file wrapper factories
 	 * @return the configured bundle file wrapper factories
 	 */
 	public List<BundleFileWrapperFactoryHook> getBundleFileWrapperFactoryHooks() {
 		return bundleFileWrapperFactoryHooksRO;
 	}

 	/**
 	 * Returns the configured activator hook factories
 	 * @return the configured activator hook factories
 	 */
 	public List<ActivatorHookFactory> getActivatorHookFactories() {
 		return activatorHookFactoriesRO;
 	}

 	private <H> void add(H hook, List<H> hooks) {
 		if (initialized)
 			throw new IllegalStateException("Cannot add hooks dynamically."); //$NON-NLS-1$
 		hooks.add(hook);
 	}

 	/**
 	 * Adds a class loader hook to this hook registry.
 	 * @param classLoaderHook a class loading hook object.
 	 */
 	public void addClassLoaderHook(ClassLoaderHook classLoaderHook) {
 		add(classLoaderHook, classLoaderHooks);
 	}

 	/**
 	 * Adds a storage hook to this hook registry.
 	 * @param storageHookFactory a storage hook object.
 	 */
 	public void addStorageHookFactory(StorageHookFactory<?, ?, ?> storageHookFactory) {
 		add(storageHookFactory, storageHookFactories);
 	}

 	/**
 	 * Adds a bundle file wrapper factory for this hook registry
 	 * @param factory a bundle file wrapper factory object.
 	 */
 	public void addBundleFileWrapperFactoryHook(BundleFileWrapperFactoryHook factory) {
 		add(factory, bundleFileWrapperFactoryHooks);
 	}

 	/**
 	 * Adds an activator hook factory.  The activators created by this factory will be started and stopped
 	 * when the system bundle is started and stopped.
 	 * @param activatorHookFactory the activator hook factory.
 	 */
 	public void addActivatorHookFactory(ActivatorHookFactory activatorHookFactory) {
 		add(activatorHookFactory, activatorHookFactories);
 	}

 	/**
 	 * Returns the configuration associated with this hook registry.
 	 * @return the configuration associated with this hook registry.
 	 */
 	public EquinoxConfiguration getConfiguration() {
 		return container.getConfiguration();
 	}

 	/**
 	 * Returns the equinox container associated with this hook registry.
 	 * @return the equinox container associated with this hook registry.
 	 */
 	public EquinoxContainer getContainer() {
 		return container;
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2005, 2016 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/

	package org.eclipse.osgi.internal.hookregistry;

	import java.io.IOException;
	import java.io.InputStream;
	import java.net.URL;
	import java.util.ArrayList;
	import java.util.Collections;
	import java.util.Enumeration;
	import java.util.Iterator;
	import java.util.List;
	import java.util.Properties;
	import org.eclipse.osgi.framework.log.FrameworkLogEntry;
	import org.eclipse.osgi.internal.cds.CDSHookConfigurator;
	import org.eclipse.osgi.internal.framework.EquinoxConfiguration;
	import org.eclipse.osgi.internal.framework.EquinoxContainer;
	import org.eclipse.osgi.internal.hooks.DevClassLoadingHook;
	import org.eclipse.osgi.internal.hooks.EclipseLazyStarter;
	import org.eclipse.osgi.internal.signedcontent.SignedBundleHook;
	import org.eclipse.osgi.internal.weaving.WeavingHookConfigurator;
	import org.eclipse.osgi.util.ManifestElement;

	/**
	* The hook registry is used to store all the hooks which are
	* configured by the hook configurators.
	* @see HookConfigurator
	*/
	public final class HookRegistry {
	/**
	* The hook configurators properties file ("hookconfigurators.properties") <p>
	* A framework extension may supply a hook configurators properties file to specify a
	* list of hook configurators.
	* @see #HOOK_CONFIGURATORS
	*/
	public static final String HOOK_CONFIGURATORS_FILE = "hookconfigurators.properties"; //$NON-NLS-1$

	/**
	* The hook configurators property key ("hookconfigurators.properties") used in
	* a hook configurators properties file to specify a comma separated list of fully
	* qualified hook configurator classes.
	*/
	public static final String HOOK_CONFIGURATORS = "hook.configurators"; //$NON-NLS-1$

	/**
	* A system property ("osgi.hook.configurators.include") used to add additional
	* hook configurators. This is helpful for configuring optional hook configurators.
	*/
	public static final String PROP_HOOK_CONFIGURATORS_INCLUDE = "osgi.hook.configurators.include"; //$NON-NLS-1$

	/**
	* A system property ("osgi.hook.configurators.exclude") used to exclude
	* any hook configurators. This is helpful for disabling hook
	* configurators that is specified in hook configurator properties files.
	*/
	public static final String PROP_HOOK_CONFIGURATORS_EXCLUDE = "osgi.hook.configurators.exclude"; //$NON-NLS-1$

	/**
	* A system property ("osgi.hook.configurators") used to specify the list
	* of hook configurators. If this property is set then the list of configurators
	* specified will be the only configurators used.
	*/
	public static final String PROP_HOOK_CONFIGURATORS = "osgi.hook.configurators"; //$NON-NLS-1$

	private static final String BUILTIN_HOOKS = "builtin.hooks"; //$NON-NLS-1$

	private final EquinoxContainer container;
	private volatile boolean initialized = false;
	private final List<ClassLoaderHook> classLoaderHooks = new ArrayList<>();
	private final List<ClassLoaderHook> classLoaderHooksRO = Collections.unmodifiableList(classLoaderHooks);
	private final List<StorageHookFactory<?, ?, ?>> storageHookFactories = new ArrayList<>();
	private final List<StorageHookFactory<?, ?, ?>> storageHookFactoriesRO = Collections.unmodifiableList(storageHookFactories);
	private final List<BundleFileWrapperFactoryHook> bundleFileWrapperFactoryHooks = new ArrayList<>();
	private final List<BundleFileWrapperFactoryHook> bundleFileWrapperFactoryHooksRO = Collections.unmodifiableList(bundleFileWrapperFactoryHooks);
	private final List<ActivatorHookFactory> activatorHookFactories = new ArrayList<>();
	private final List<ActivatorHookFactory> activatorHookFactoriesRO = Collections.unmodifiableList(activatorHookFactories);

	public HookRegistry(EquinoxContainer container) {
	this.container = container;
	}

	/**
	* Initializes the hook configurators. The following steps are used to initialize the hook configurators. <p>
	* 1. Get a list of hook configurators from all hook configurators properties files on the classpath,
	* add this list to the overall list of hook configurators, remove duplicates. <p>
	* 2. Get a list of hook configurators from the ("osgi.hook.configurators.include") system property
	* and add this list to the overall list of hook configurators, remove duplicates. <p>
	* 3. Get a list of hook configurators from the ("osgi.hook.configurators.exclude") system property
	* and remove this list from the overall list of hook configurators. <p>
	* 4. Load each hook configurator class, create a new instance, then call the {@link HookConfigurator#addHooks(HookRegistry)} method <p>
	* 5. Set this HookRegistry object to read only to prevent any other hooks from being added. <p>
	*/
	public void initialize() {
	List<String> configurators = new ArrayList<>(5);
	List<FrameworkLogEntry> errors = new ArrayList<>(0); // optimistic that no errors will occur
	mergeFileHookConfigurators(configurators, errors);
	mergePropertyHookConfigurators(configurators);
	synchronized (this) {
	addClassLoaderHook(new DevClassLoadingHook(container.getConfiguration()));
	addClassLoaderHook(new EclipseLazyStarter(container));
	addClassLoaderHook(new WeavingHookConfigurator(container));
	configurators.add(SignedBundleHook.class.getName());
	configurators.add(CDSHookConfigurator.class.getName());
	loadConfigurators(configurators, errors);
	// set to read-only
	initialized = true;
	}
	for (FrameworkLogEntry error : errors) {
	container.getLogServices().getFrameworkLog().log(error);
	}
	}

	private void mergeFileHookConfigurators(List<String> configuratorList, List<FrameworkLogEntry> errors) {
	ClassLoader cl = getClass().getClassLoader();
	// get all hook configurators files in your classloader delegation
	Enumeration<URL> hookConfigurators;
	try {
	hookConfigurators = cl != null ? cl.getResources(HookRegistry.HOOK_CONFIGURATORS_FILE) : ClassLoader.getSystemResources(HookRegistry.HOOK_CONFIGURATORS_FILE);
	} catch (IOException e) {
	errors.add(new FrameworkLogEntry(EquinoxContainer.NAME, FrameworkLogEntry.ERROR, 0, "getResources error on " + HookRegistry.HOOK_CONFIGURATORS_FILE, 0, e, null)); //$NON-NLS-1$
	return;
	}
	int curBuiltin = 0;
	while (hookConfigurators.hasMoreElements()) {
	URL url = hookConfigurators.nextElement();
	InputStream input = null;
	try {
	// check each file for a hook.configurators property
	Properties configuratorProps = new Properties();
	input = url.openStream();
	configuratorProps.load(input);
	String hooksValue = configuratorProps.getProperty(HOOK_CONFIGURATORS);
	if (hooksValue == null)
	continue;
	boolean builtin = Boolean.valueOf(configuratorProps.getProperty(BUILTIN_HOOKS)).booleanValue();
	String[] configurators = ManifestElement.getArrayFromList(hooksValue, ","); //$NON-NLS-1$
	for (int i = 0; i < configurators.length; i++)
	if (!configuratorList.contains(configurators[i])) {
	if (builtin) // make sure the built-in configurators are listed first (bug 170881)
	configuratorList.add(curBuiltin++, configurators[i]);
	else
	configuratorList.add(configurators[i]);
	}
	} catch (IOException e) {
	errors.add(new FrameworkLogEntry(EquinoxContainer.NAME, FrameworkLogEntry.ERROR, 0, "error loading: " + url.toExternalForm(), 0, e, null)); //$NON-NLS-1$
	// ignore and continue to next URL
	} finally {
	if (input != null)
	try {
	input.close();
	} catch (IOException e) {
	// do nothing
	}
	}
	}
	}

	private void mergePropertyHookConfigurators(List<String> configuratorList) {
	// see if there is a configurators list
	String[] configurators = ManifestElement.getArrayFromList(container.getConfiguration().getConfiguration(HookRegistry.PROP_HOOK_CONFIGURATORS), ","); //$NON-NLS-1$
	if (configurators.length > 0) {
	configuratorList.clear(); // clear the list, we are only going to use the configurators from the list
	for (int i = 0; i < configurators.length; i++)
	if (!configuratorList.contains(configurators[i]))
	configuratorList.add(configurators[i]);
	return; // don't do anything else
	}
	// Make sure the configurators from the include property are in the list
	String[] includeConfigurators = ManifestElement.getArrayFromList(container.getConfiguration().getConfiguration(HookRegistry.PROP_HOOK_CONFIGURATORS_INCLUDE), ","); //$NON-NLS-1$
	for (int i = 0; i < includeConfigurators.length; i++)
	if (!configuratorList.contains(includeConfigurators[i]))
	configuratorList.add(includeConfigurators[i]);
	// Make sure the configurators from the exclude property are no in the list
	String[] excludeHooks = ManifestElement.getArrayFromList(container.getConfiguration().getConfiguration(HookRegistry.PROP_HOOK_CONFIGURATORS_EXCLUDE), ","); //$NON-NLS-1$
	for (int i = 0; i < excludeHooks.length; i++)
	configuratorList.remove(excludeHooks[i]);
	}

	private void loadConfigurators(List<String> configurators, List<FrameworkLogEntry> errors) {
	for (Iterator<String> iHooks = configurators.iterator(); iHooks.hasNext();) {
	String hookName = iHooks.next();
	try {
	Class<?> clazz = Class.forName(hookName);
	HookConfigurator configurator = (HookConfigurator) clazz.newInstance();
	configurator.addHooks(this);
	} catch (Throwable t) {
	// We expect the follow exeptions may happen; but we need to catch all here
	// ClassNotFoundException
	// IllegalAccessException
	// InstantiationException
	// ClassCastException
	errors.add(new FrameworkLogEntry(EquinoxContainer.NAME, FrameworkLogEntry.ERROR, 0, "error loading hook: " + hookName, 0, t, null)); //$NON-NLS-1$
	}
	}
	}

	/**
	* Returns the list of configured class loading hooks.
	* @return the list of configured class loading hooks.
	*/
	public List<ClassLoaderHook> getClassLoaderHooks() {
	return classLoaderHooksRO;
	}

	/**
	* Returns the list of configured storage hooks.
	* @return the list of configured storage hooks.
	*/
	public List<StorageHookFactory<?, ?, ?>> getStorageHookFactories() {
	return storageHookFactoriesRO;
	}

	/**
	* Returns the configured bundle file wrapper factories
	* @return the configured bundle file wrapper factories
	*/
	public List<BundleFileWrapperFactoryHook> getBundleFileWrapperFactoryHooks() {
	return bundleFileWrapperFactoryHooksRO;
	}

	/**
	* Returns the configured activator hook factories
	* @return the configured activator hook factories
	*/
	public List<ActivatorHookFactory> getActivatorHookFactories() {
	return activatorHookFactoriesRO;
	}

	private <H> void add(H hook, List<H> hooks) {
	if (initialized)
	throw new IllegalStateException("Cannot add hooks dynamically."); //$NON-NLS-1$
	hooks.add(hook);
	}

	/**
	* Adds a class loader hook to this hook registry.
	* @param classLoaderHook a class loading hook object.
	*/
	public void addClassLoaderHook(ClassLoaderHook classLoaderHook) {
	add(classLoaderHook, classLoaderHooks);
	}

	/**
	* Adds a storage hook to this hook registry.
	* @param storageHookFactory a storage hook object.
	*/
	public void addStorageHookFactory(StorageHookFactory<?, ?, ?> storageHookFactory) {
	add(storageHookFactory, storageHookFactories);
	}

	/**
	* Adds a bundle file wrapper factory for this hook registry
	* @param factory a bundle file wrapper factory object.
	*/
	public void addBundleFileWrapperFactoryHook(BundleFileWrapperFactoryHook factory) {
	add(factory, bundleFileWrapperFactoryHooks);
	}

	/**
	* Adds an activator hook factory. The activators created by this factory will be started and stopped
	* when the system bundle is started and stopped.
	* @param activatorHookFactory the activator hook factory.
	*/
	public void addActivatorHookFactory(ActivatorHookFactory activatorHookFactory) {
	add(activatorHookFactory, activatorHookFactories);
	}

	/**
	* Returns the configuration associated with this hook registry.
	* @return the configuration associated with this hook registry.
	*/
	public EquinoxConfiguration getConfiguration() {
	return container.getConfiguration();
	}

	/**
	* Returns the equinox container associated with this hook registry.
	* @return the equinox container associated with this hook registry.
	*/
	public EquinoxContainer getContainer() {
	return container;
	}
	}