bundles/org.eclipse.equinox.common/src/org/eclipse/core/internal/runtime/AdapterManager.java - equinox/rt.equinox.bundles - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2006 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.core.internal.runtime;

 import java.util.*;
 import org.eclipse.core.runtime.IAdapterFactory;
 import org.eclipse.core.runtime.IAdapterManager;

 /**
  * This class is the standard implementation of <code>IAdapterManager</code>. It provides
  * fast lookup of property values with the following semantics:
  * <ul>
  * <li>At most one factory will be invoked per property lookup
  * <li>If multiple installed factories provide the same adapter, only the first found in
  * the search order will be invoked.
  * <li>The search order from a class with the definition <br>
  * <code>class X extends Y implements A, B</code><br> is as follows: <il>
  * <li>the target's class: X
  * <li>X's superclasses in order to <code>Object</code>
  * <li>a breadth-first traversal of the target class's interfaces in the order returned by
  * <code>getInterfaces</code> (in the example, A and its superinterfaces then B and its
  * superinterfaces) </il>
  * </ul>
  *
  * @see IAdapterFactory
  * @see IAdapterManager
  */
 public final class AdapterManager implements IAdapterManager {
 	/**
 	 * Cache of adapters for a given adaptable class. Maps String  -> Map
 	 * (adaptable class name -> (adapter class name -> factory instance))
 	 */
 	protected HashMap adapterLookup;
 	/**
 	 * Cache of classes for a given type name. Avoids too many loadClass calls.
 	 * (factory -> (type name -> clazz))
 	 */
 	protected HashMap classLookup;
 	/**
 	 * Cache of class lookup order. This avoids having to compute often, and
 	 * provides clients with quick lookup for instanceOf checks based on type name.
 	 */
 	protected HashMap classSearchOrderLookup;
 	/**
 	 * Map of factories, keyed by <code>String</code>, fully qualified class name of
 	 * the adaptable class that the factory provides adapters for. Value is a <code>List</code>
 	 * of <code>IAdapterFactory</code>.
 	 */
 	protected final HashMap factories;

 	private ArrayList lazyFactoryProviders;

 	private static final AdapterManager singleton = new AdapterManager();

 	public static AdapterManager getDefault() {
 		return singleton;
 	}

 	/**
 	 * Private constructor to block instance creation.
 	 */
 	private AdapterManager() {
 		factories = new HashMap(5);
 		lazyFactoryProviders = new ArrayList(1);
 		adapterLookup = null;
 	}

 	/**
 	 * Given a type name, add all of the factories that respond to those types into
 	 * the given table. Each entry will be keyed by the adapter class name (supplied in
 	 * IAdapterFactory.getAdapterList).
 	 */
 	private void addFactoriesFor(String typeName, Map table) {
 		List factoryList = (List) getFactories().get(typeName);
 		if (factoryList == null)
 			return;
 		for (int i = 0, imax = factoryList.size(); i < imax; i++) {
 			IAdapterFactory factory = (IAdapterFactory) factoryList.get(i);
 			if (factory instanceof IAdapterFactoryExt) {
 				String[] adapters = ((IAdapterFactoryExt) factory).getAdapterNames();
 				for (int j = 0; j < adapters.length; j++) {
 					if (table.get(adapters[j]) == null)
 						table.put(adapters[j], factory);
 				}
 			} else {
 				Class[] adapters = factory.getAdapterList();
 				for (int j = 0; j < adapters.length; j++) {
 					String adapterName = adapters[j].getName();
 					if (table.get(adapterName) == null)
 						table.put(adapterName, factory);
 				}
 			}
 		}
 	}

 	private void cacheClassLookup(IAdapterFactory factory, Class clazz) {
 		//cache reference to lookup to protect against concurrent flush
 		HashMap lookup = classLookup;
 		if (lookup == null)
 			classLookup = lookup = new HashMap(4);
 		HashMap classes = (HashMap) lookup.get(factory);
 		if (classes == null) {
 			classes = new HashMap(4);
 			lookup.put(factory, classes);
 		}
 		classes.put(clazz.getName(), clazz);
 	}

 	private Class cachedClassForName(IAdapterFactory factory, String typeName) {
 		Class clazz = null;
 		//cache reference to lookup to protect against concurrent flush
 		HashMap lookup = classLookup;
 		if (lookup != null) {
 			HashMap classes = (HashMap) lookup.get(factory);
 			if (classes != null) {
 				clazz = (Class) classes.get(typeName);
 			}
 		}
 		return clazz;
 	}

 	/**
 	 * Returns the class with the given fully qualified name, or null
 	 * if that class does not exist or belongs to a plug-in that has not
 	 * yet been loaded.
 	 */
 	private Class classForName(IAdapterFactory factory, String typeName) {
 		Class clazz = cachedClassForName(factory, typeName);
 		if (clazz == null) {
 			try {
 				if (factory instanceof IAdapterFactoryExt)
 					factory = ((IAdapterFactoryExt) factory).loadFactory(false);
 				if (factory != null) {
 					clazz = factory.getClass().getClassLoader().loadClass(typeName);
 					cacheClassLookup(factory, clazz);
 				}
 			} catch (ClassNotFoundException e) {
 				// class not yet loaded
 			}
 		}
 		return clazz;
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.core.runtime.IAdapterManager#getAdapterTypes(java.lang.Class)
 	 */
 	public String[] computeAdapterTypes(Class adaptable) {
 		Set types = getFactories(adaptable).keySet();
 		return (String[]) types.toArray(new String[types.size()]);
 	}

 	/**
 	 * Computes the adapters that the provided class can adapt to, along
 	 * with the factory object that can perform that transformation. Returns
 	 * a table of adapter class name to factory object.
 	 * @param adaptable
 	 */
 	private Map getFactories(Class adaptable) {
 		//cache reference to lookup to protect against concurrent flush
 		HashMap lookup = adapterLookup;
 		if (lookup == null)
 			adapterLookup = lookup = new HashMap(30);
 		Map table = (Map) lookup.get(adaptable.getName());
 		if (table == null) {
 			// calculate adapters for the class
 			table = new HashMap(4);
 			Class[] classes = computeClassOrder(adaptable);
 			for (int i = 0; i < classes.length; i++)
 				addFactoriesFor(classes[i].getName(), table);
 			// cache the table
 			lookup.put(adaptable.getName(), table);
 		}
 		return table;
 	}

 	public Class[] computeClassOrder(Class adaptable) {
 		List classes = null;
 		//cache reference to lookup to protect against concurrent flush
 		HashMap lookup = classSearchOrderLookup;
 		if (lookup != null)
 			classes = (List) lookup.get(adaptable);
 		// compute class order only if it hasn't been cached before
 		if (classes == null) {
 			classes = new ArrayList();
 			computeClassOrder(adaptable, classes);
 			if (lookup == null)
 				classSearchOrderLookup = lookup = new HashMap();
 			lookup.put(adaptable, classes);
 		}
 		return (Class[]) classes.toArray(new Class[classes.size()]);
 	}

 	/**
 	 * Builds and returns a table of adapters for the given adaptable type.
 	 * The table is keyed by adapter class name. The
 	 * value is the <b>sole<b> factory that defines that adapter. Note that
 	 * if multiple adapters technically define the same property, only the
 	 * first found in the search order is considered.
 	 *
 	 * Note that it is important to maintain a consistent class and interface
 	 * lookup order. See the class comment for more details.
 	 */
 	private void computeClassOrder(Class adaptable, Collection classes) {
 		Class clazz = adaptable;
 		Set seen = new HashSet(4);
 		while (clazz != null) {
 			classes.add(clazz);
 			computeInterfaceOrder(clazz.getInterfaces(), classes, seen);
 			clazz = clazz.getSuperclass();
 		}
 	}

 	private void computeInterfaceOrder(Class[] interfaces, Collection classes, Set seen) {
 		List newInterfaces = new ArrayList(interfaces.length);
 		for (int i = 0; i < interfaces.length; i++) {
 			Class interfac = interfaces[i];
 			if (seen.add(interfac)) {
 				//note we cannot recurse here without changing the resulting interface order
 				classes.add(interfac);
 				newInterfaces.add(interfac);
 			}
 		}
 		for (Iterator it = newInterfaces.iterator(); it.hasNext();)
 			computeInterfaceOrder(((Class) it.next()).getInterfaces(), classes, seen);
 	}

 	/**
 	 * Flushes the cache of adapter search paths. This is generally required whenever an
 	 * adapter is added or removed.
 	 * <p>
 	 * It is likely easier to just toss the whole cache rather than trying to be smart
 	 * and remove only those entries affected.
 	 * </p>
 	 */
 	public synchronized void flushLookup() {
 		adapterLookup = null;
 		classLookup = null;
 		classSearchOrderLookup = null;
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.core.runtime.IAdapterManager#getAdapter(java.lang.Object, java.lang.Class)
 	 */
 	public Object getAdapter(Object adaptable, Class adapterType) {
 		IAdapterFactory factory = (IAdapterFactory) getFactories(adaptable.getClass()).get(adapterType.getName());
 		Object result = null;
 		if (factory != null)
 			result = factory.getAdapter(adaptable, adapterType);
 		if (result == null && adapterType.isInstance(adaptable))
 			return adaptable;
 		return result;
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.core.runtime.IAdapterManager#getAdapter(java.lang.Object, java.lang.Class)
 	 */
 	public Object getAdapter(Object adaptable, String adapterType) {
 		return getAdapter(adaptable, adapterType, false);
 	}

 	/**
 	 * Returns an adapter of the given type for the provided adapter.
 	 * @param adaptable the object to adapt
 	 * @param adapterType the type to adapt the object to
 	 * @param force <code>true</code> if the plug-in providing the
 	 * factory should be activated if necessary. <code>false</code>
 	 * if no plugin activations are desired.
 	 */
 	private Object getAdapter(Object adaptable, String adapterType, boolean force) {
 		IAdapterFactory factory = (IAdapterFactory) getFactories(adaptable.getClass()).get(adapterType);
 		if (force && factory instanceof IAdapterFactoryExt)
 			factory = ((IAdapterFactoryExt) factory).loadFactory(true);
 		Object result = null;
 		if (factory != null) {
 			Class clazz = classForName(factory, adapterType);
 			if (clazz != null)
 				result = factory.getAdapter(adaptable, clazz);
 		}
 		if (result == null && adaptable.getClass().getName().equals(adapterType))
 			return adaptable;
 		return result;
 	}

 	public boolean hasAdapter(Object adaptable, String adapterTypeName) {
 		return getFactories(adaptable.getClass()).get(adapterTypeName) != null;
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.core.runtime.IAdapterManager#loadAdapter(java.lang.Object, java.lang.String)
 	 */
 	public Object loadAdapter(Object adaptable, String adapterTypeName) {
 		return getAdapter(adaptable, adapterTypeName, true);
 	}

 	/*
 	 * @see IAdapterManager#registerAdapters
 	 */
 	public synchronized void registerAdapters(IAdapterFactory factory, Class adaptable) {
 		registerFactory(factory, adaptable.getName());
 		flushLookup();
 	}

 	/*
 	 * @see IAdapterManager#registerAdapters
 	 */
 	public void registerFactory(IAdapterFactory factory, String adaptableType) {
 		List list = (List) factories.get(adaptableType);
 		if (list == null) {
 			list = new ArrayList(5);
 			factories.put(adaptableType, list);
 		}
 		list.add(factory);
 	}

 	/*
 	 * @see IAdapterManager#unregisterAdapters
 	 */
 	public synchronized void unregisterAdapters(IAdapterFactory factory) {
 		for (Iterator it = factories.values().iterator(); it.hasNext();)
 			((List) it.next()).remove(factory);
 		flushLookup();
 	}

 	/*
 	 * @see IAdapterManager#unregisterAdapters
 	 */
 	public synchronized void unregisterAdapters(IAdapterFactory factory, Class adaptable) {
 		List factoryList = (List) factories.get(adaptable.getName());
 		if (factoryList == null)
 			return;
 		factoryList.remove(factory);
 		flushLookup();
 	}

 	/*
 	 * Shuts down the adapter manager by removing all factories
 	 * and removing the registry change listener. Should only be
 	 * invoked during platform shutdown.
 	 */
 	public synchronized void unregisterAllAdapters() {
 		factories.clear();
 		flushLookup();
 	}

 	public void registerLazyFactoryProvider(IAdapterManagerProvider factoryProvider) {
 		synchronized (lazyFactoryProviders) {
 			lazyFactoryProviders.add(factoryProvider);
 		}
 	}

 	public boolean unregisterLazyFactoryProvider(IAdapterManagerProvider factoryProvider) {
 		synchronized (lazyFactoryProviders) {
 			return lazyFactoryProviders.remove(factoryProvider);
 		}
 	}

 	public HashMap getFactories() {
 		// avoid the synchronize if we don't have to call it
 		if (lazyFactoryProviders.size() == 0)
 			return factories;
 		synchronized (lazyFactoryProviders) {
 			while (lazyFactoryProviders.size() > 0) {
 				IAdapterManagerProvider provider = (IAdapterManagerProvider) lazyFactoryProviders.remove(0);
 				if (provider.addFactories(this))
 					flushLookup();
 			}
 		}
 		return factories;
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2006 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.core.internal.runtime;

	import java.util.*;
	import org.eclipse.core.runtime.IAdapterFactory;
	import org.eclipse.core.runtime.IAdapterManager;

	/**
	* This class is the standard implementation of <code>IAdapterManager</code>. It provides
	* fast lookup of property values with the following semantics:
	* <ul>
	* <li>At most one factory will be invoked per property lookup
	* <li>If multiple installed factories provide the same adapter, only the first found in
	* the search order will be invoked.
	* <li>The search order from a class with the definition <br>
	* <code>class X extends Y implements A, B</code><br> is as follows: <il>
	* <li>the target's class: X
	* <li>X's superclasses in order to <code>Object</code>
	* <li>a breadth-first traversal of the target class's interfaces in the order returned by
	* <code>getInterfaces</code> (in the example, A and its superinterfaces then B and its
	* superinterfaces) </il>
	* </ul>
	*
	* @see IAdapterFactory
	* @see IAdapterManager
	*/
	public final class AdapterManager implements IAdapterManager {
	/**
	* Cache of adapters for a given adaptable class. Maps String -> Map
	* (adaptable class name -> (adapter class name -> factory instance))
	*/
	protected HashMap adapterLookup;
	/**
	* Cache of classes for a given type name. Avoids too many loadClass calls.
	* (factory -> (type name -> clazz))
	*/
	protected HashMap classLookup;
	/**
	* Cache of class lookup order. This avoids having to compute often, and
	* provides clients with quick lookup for instanceOf checks based on type name.
	*/
	protected HashMap classSearchOrderLookup;
	/**
	* Map of factories, keyed by <code>String</code>, fully qualified class name of
	* the adaptable class that the factory provides adapters for. Value is a <code>List</code>
	* of <code>IAdapterFactory</code>.
	*/
	protected final HashMap factories;

	private ArrayList lazyFactoryProviders;

	private static final AdapterManager singleton = new AdapterManager();

	public static AdapterManager getDefault() {
	return singleton;
	}

	/**
	* Private constructor to block instance creation.
	*/
	private AdapterManager() {
	factories = new HashMap(5);
	lazyFactoryProviders = new ArrayList(1);
	adapterLookup = null;
	}

	/**
	* Given a type name, add all of the factories that respond to those types into
	* the given table. Each entry will be keyed by the adapter class name (supplied in
	* IAdapterFactory.getAdapterList).
	*/
	private void addFactoriesFor(String typeName, Map table) {
	List factoryList = (List) getFactories().get(typeName);
	if (factoryList == null)
	return;
	for (int i = 0, imax = factoryList.size(); i < imax; i++) {
	IAdapterFactory factory = (IAdapterFactory) factoryList.get(i);
	if (factory instanceof IAdapterFactoryExt) {
	String[] adapters = ((IAdapterFactoryExt) factory).getAdapterNames();
	for (int j = 0; j < adapters.length; j++) {
	if (table.get(adapters[j]) == null)
	table.put(adapters[j], factory);
	}
	} else {
	Class[] adapters = factory.getAdapterList();
	for (int j = 0; j < adapters.length; j++) {
	String adapterName = adapters[j].getName();
	if (table.get(adapterName) == null)
	table.put(adapterName, factory);
	}
	}
	}
	}

	private void cacheClassLookup(IAdapterFactory factory, Class clazz) {
	//cache reference to lookup to protect against concurrent flush
	HashMap lookup = classLookup;
	if (lookup == null)
	classLookup = lookup = new HashMap(4);
	HashMap classes = (HashMap) lookup.get(factory);
	if (classes == null) {
	classes = new HashMap(4);
	lookup.put(factory, classes);
	}
	classes.put(clazz.getName(), clazz);
	}

	private Class cachedClassForName(IAdapterFactory factory, String typeName) {
	Class clazz = null;
	//cache reference to lookup to protect against concurrent flush
	HashMap lookup = classLookup;
	if (lookup != null) {
	HashMap classes = (HashMap) lookup.get(factory);
	if (classes != null) {
	clazz = (Class) classes.get(typeName);
	}
	}
	return clazz;
	}

	/**
	* Returns the class with the given fully qualified name, or null
	* if that class does not exist or belongs to a plug-in that has not
	* yet been loaded.
	*/
	private Class classForName(IAdapterFactory factory, String typeName) {
	Class clazz = cachedClassForName(factory, typeName);
	if (clazz == null) {
	try {
	if (factory instanceof IAdapterFactoryExt)
	factory = ((IAdapterFactoryExt) factory).loadFactory(false);
	if (factory != null) {
	clazz = factory.getClass().getClassLoader().loadClass(typeName);
	cacheClassLookup(factory, clazz);
	}
	} catch (ClassNotFoundException e) {
	// class not yet loaded
	}
	}
	return clazz;
	}

	/* (non-Javadoc)
	* @see org.eclipse.core.runtime.IAdapterManager#getAdapterTypes(java.lang.Class)
	*/
	public String[] computeAdapterTypes(Class adaptable) {
	Set types = getFactories(adaptable).keySet();
	return (String[]) types.toArray(new String[types.size()]);
	}

	/**
	* Computes the adapters that the provided class can adapt to, along
	* with the factory object that can perform that transformation. Returns
	* a table of adapter class name to factory object.
	* @param adaptable
	*/
	private Map getFactories(Class adaptable) {
	//cache reference to lookup to protect against concurrent flush
	HashMap lookup = adapterLookup;
	if (lookup == null)
	adapterLookup = lookup = new HashMap(30);
	Map table = (Map) lookup.get(adaptable.getName());
	if (table == null) {
	// calculate adapters for the class
	table = new HashMap(4);
	Class[] classes = computeClassOrder(adaptable);
	for (int i = 0; i < classes.length; i++)
	addFactoriesFor(classes[i].getName(), table);
	// cache the table
	lookup.put(adaptable.getName(), table);
	}
	return table;
	}

	public Class[] computeClassOrder(Class adaptable) {
	List classes = null;
	//cache reference to lookup to protect against concurrent flush
	HashMap lookup = classSearchOrderLookup;
	if (lookup != null)
	classes = (List) lookup.get(adaptable);
	// compute class order only if it hasn't been cached before
	if (classes == null) {
	classes = new ArrayList();
	computeClassOrder(adaptable, classes);
	if (lookup == null)
	classSearchOrderLookup = lookup = new HashMap();
	lookup.put(adaptable, classes);
	}
	return (Class[]) classes.toArray(new Class[classes.size()]);
	}

	/**
	* Builds and returns a table of adapters for the given adaptable type.
	* The table is keyed by adapter class name. The
	* value is the <b>sole<b> factory that defines that adapter. Note that
	* if multiple adapters technically define the same property, only the
	* first found in the search order is considered.
	*
	* Note that it is important to maintain a consistent class and interface
	* lookup order. See the class comment for more details.
	*/
	private void computeClassOrder(Class adaptable, Collection classes) {
	Class clazz = adaptable;
	Set seen = new HashSet(4);
	while (clazz != null) {
	classes.add(clazz);
	computeInterfaceOrder(clazz.getInterfaces(), classes, seen);
	clazz = clazz.getSuperclass();
	}
	}

	private void computeInterfaceOrder(Class[] interfaces, Collection classes, Set seen) {
	List newInterfaces = new ArrayList(interfaces.length);
	for (int i = 0; i < interfaces.length; i++) {
	Class interfac = interfaces[i];
	if (seen.add(interfac)) {
	//note we cannot recurse here without changing the resulting interface order
	classes.add(interfac);
	newInterfaces.add(interfac);
	}
	}
	for (Iterator it = newInterfaces.iterator(); it.hasNext();)
	computeInterfaceOrder(((Class) it.next()).getInterfaces(), classes, seen);
	}

	/**
	* Flushes the cache of adapter search paths. This is generally required whenever an
	* adapter is added or removed.
	* <p>
	* It is likely easier to just toss the whole cache rather than trying to be smart
	* and remove only those entries affected.
	* </p>
	*/
	public synchronized void flushLookup() {
	adapterLookup = null;
	classLookup = null;
	classSearchOrderLookup = null;
	}

	/* (non-Javadoc)
	* @see org.eclipse.core.runtime.IAdapterManager#getAdapter(java.lang.Object, java.lang.Class)
	*/
	public Object getAdapter(Object adaptable, Class adapterType) {
	IAdapterFactory factory = (IAdapterFactory) getFactories(adaptable.getClass()).get(adapterType.getName());
	Object result = null;
	if (factory != null)
	result = factory.getAdapter(adaptable, adapterType);
	if (result == null && adapterType.isInstance(adaptable))
	return adaptable;
	return result;
	}

	/* (non-Javadoc)
	* @see org.eclipse.core.runtime.IAdapterManager#getAdapter(java.lang.Object, java.lang.Class)
	*/
	public Object getAdapter(Object adaptable, String adapterType) {
	return getAdapter(adaptable, adapterType, false);
	}

	/**
	* Returns an adapter of the given type for the provided adapter.
	* @param adaptable the object to adapt
	* @param adapterType the type to adapt the object to
	* @param force <code>true</code> if the plug-in providing the
	* factory should be activated if necessary. <code>false</code>
	* if no plugin activations are desired.
	*/
	private Object getAdapter(Object adaptable, String adapterType, boolean force) {
	IAdapterFactory factory = (IAdapterFactory) getFactories(adaptable.getClass()).get(adapterType);
	if (force && factory instanceof IAdapterFactoryExt)
	factory = ((IAdapterFactoryExt) factory).loadFactory(true);
	Object result = null;
	if (factory != null) {
	Class clazz = classForName(factory, adapterType);
	if (clazz != null)
	result = factory.getAdapter(adaptable, clazz);
	}
	if (result == null && adaptable.getClass().getName().equals(adapterType))
	return adaptable;
	return result;
	}

	public boolean hasAdapter(Object adaptable, String adapterTypeName) {
	return getFactories(adaptable.getClass()).get(adapterTypeName) != null;
	}

	/* (non-Javadoc)
	* @see org.eclipse.core.runtime.IAdapterManager#loadAdapter(java.lang.Object, java.lang.String)
	*/
	public Object loadAdapter(Object adaptable, String adapterTypeName) {
	return getAdapter(adaptable, adapterTypeName, true);
	}

	/*
	* @see IAdapterManager#registerAdapters
	*/
	public synchronized void registerAdapters(IAdapterFactory factory, Class adaptable) {
	registerFactory(factory, adaptable.getName());
	flushLookup();
	}

	/*
	* @see IAdapterManager#registerAdapters
	*/
	public void registerFactory(IAdapterFactory factory, String adaptableType) {
	List list = (List) factories.get(adaptableType);
	if (list == null) {
	list = new ArrayList(5);
	factories.put(adaptableType, list);
	}
	list.add(factory);
	}

	/*
	* @see IAdapterManager#unregisterAdapters
	*/
	public synchronized void unregisterAdapters(IAdapterFactory factory) {
	for (Iterator it = factories.values().iterator(); it.hasNext();)
	((List) it.next()).remove(factory);
	flushLookup();
	}

	/*
	* @see IAdapterManager#unregisterAdapters
	*/
	public synchronized void unregisterAdapters(IAdapterFactory factory, Class adaptable) {
	List factoryList = (List) factories.get(adaptable.getName());
	if (factoryList == null)
	return;
	factoryList.remove(factory);
	flushLookup();
	}

	/*
	* Shuts down the adapter manager by removing all factories
	* and removing the registry change listener. Should only be
	* invoked during platform shutdown.
	*/
	public synchronized void unregisterAllAdapters() {
	factories.clear();
	flushLookup();
	}

	public void registerLazyFactoryProvider(IAdapterManagerProvider factoryProvider) {
	synchronized (lazyFactoryProviders) {
	lazyFactoryProviders.add(factoryProvider);
	}
	}

	public boolean unregisterLazyFactoryProvider(IAdapterManagerProvider factoryProvider) {
	synchronized (lazyFactoryProviders) {
	return lazyFactoryProviders.remove(factoryProvider);
	}
	}

	public HashMap getFactories() {
	// avoid the synchronize if we don't have to call it
	if (lazyFactoryProviders.size() == 0)
	return factories;
	synchronized (lazyFactoryProviders) {
	while (lazyFactoryProviders.size() > 0) {
	IAdapterManagerProvider provider = (IAdapterManagerProvider) lazyFactoryProviders.remove(0);
	if (provider.addFactories(this))
	flushLookup();
	}
	}
	return factories;
	}
	}