bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/commands/CoreRegistry.java - platform/eclipse.platform.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2003 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/cpl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/

 package org.eclipse.ui.internal.commands;

 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
 import java.util.StringTokenizer;

 import org.eclipse.core.runtime.IConfigurationElement;
 import org.eclipse.core.runtime.IExtension;
 import org.eclipse.core.runtime.IPluginDescriptor;
 import org.eclipse.core.runtime.IPluginRegistry;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.ui.PlatformUI;

 public final class CoreRegistry extends AbstractRegistry {

 	private final class RegistryReader extends org.eclipse.ui.internal.registry.RegistryReader {

 		private final static String DEPRECATED_KEY_SEQUENCE_SEPARATOR = "||"; //$NON-NLS-1$
 		private final static String DEPRECATED_TAG_ACCELERATOR = "accelerator"; //$NON-NLS-1$
 		private final static String DEPRECATED_TAG_ACCELERATOR_CONFIGURATION = "acceleratorConfiguration"; //$NON-NLS-1$
 		private final static String DEPRECATED_TAG_ACCELERATOR_CONFIGURATIONS = "acceleratorConfigurations"; //$NON-NLS-1$
 		private final static String DEPRECATED_TAG_ACCELERATOR_SCOPE = "acceleratorScope"; //$NON-NLS-1$
 		private final static String DEPRECATED_TAG_ACCELERATOR_SCOPES = "acceleratorScopes"; //$NON-NLS-1$
 		private final static String DEPRECATED_TAG_ACCELERATOR_SET = "acceleratorSet"; //$NON-NLS-1$
 		private final static String DEPRECATED_TAG_ACCELERATOR_SETS = "acceleratorSets"; //$NON-NLS-1$
 		private final static String DEPRECATED_TAG_ACTION_DEFINITION = "actionDefinition"; //$NON-NLS-1$
 		private final static String DEPRECATED_TAG_ACTION_DEFINITIONS = "actionDefinitions"; //$NON-NLS-1$
 		private final static String DEPRECATED_TAG_CONFIGURATION_ID = "configurationId"; //$NON-NLS-1$
 		private final static String DEPRECATED_TAG_KEY = "key"; //$NON-NLS-1$
 		private final static String DEPRECATED_TAG_SCOPE_ID = "scopeId"; //$NON-NLS-1$
 		private final static int RANK_CORE = 2;
 		private final static String TAG_ROOT = Persistence.PACKAGE_BASE;

 		private List activeGestureConfigurations;
 		private List activeKeyConfigurations;
 		private List categories;
 		private List commands;
 		private List gestureBindings;
 		private List gestureConfigurations;
 		private List keyBindings;
 		private String keyConfiguration;
 		private List keyConfigurations;
 		private String scope;
 		private List scopes;

 		private RegistryReader(IPluginRegistry pluginRegistry) {
 			super();
 			activeGestureConfigurations = new ArrayList();
 			activeKeyConfigurations = new ArrayList();
 			categories = new ArrayList();
 			commands = new ArrayList();
 			gestureBindings = new ArrayList();
 			gestureConfigurations = new ArrayList();
 			keyBindings = new ArrayList();
 			keyConfigurations = new ArrayList();
 			scopes = new ArrayList();

 			if (pluginRegistry != null) {
 				readRegistry(pluginRegistry, PlatformUI.PLUGIN_ID, DEPRECATED_TAG_ACCELERATOR_CONFIGURATIONS);
 				readRegistry(pluginRegistry, PlatformUI.PLUGIN_ID, DEPRECATED_TAG_ACCELERATOR_SCOPES);
 				readRegistry(pluginRegistry, PlatformUI.PLUGIN_ID, DEPRECATED_TAG_ACCELERATOR_SETS);
 				readRegistry(pluginRegistry, PlatformUI.PLUGIN_ID, DEPRECATED_TAG_ACTION_DEFINITIONS);
 				readRegistry(pluginRegistry, PlatformUI.PLUGIN_ID, TAG_ROOT);
 			}

 			CoreRegistry.this.activeGestureConfigurations = Collections.unmodifiableList(activeGestureConfigurations);
 			CoreRegistry.this.activeKeyConfigurations = Collections.unmodifiableList(activeKeyConfigurations);
 			CoreRegistry.this.categories = Collections.unmodifiableList(categories);
 			CoreRegistry.this.commands = Collections.unmodifiableList(commands);
 			CoreRegistry.this.gestureBindings = Collections.unmodifiableList(gestureBindings);
 			CoreRegistry.this.gestureConfigurations = Collections.unmodifiableList(gestureConfigurations);
 			CoreRegistry.this.keyBindings = Collections.unmodifiableList(keyBindings);
 			CoreRegistry.this.keyConfigurations = Collections.unmodifiableList(keyConfigurations);
 			CoreRegistry.this.scopes = Collections.unmodifiableList(scopes);
 		}

 		protected boolean readElement(IConfigurationElement element) {
 			String name = element.getName();

 			if (DEPRECATED_TAG_ACCELERATOR.equals(name) || DEPRECATED_TAG_ACCELERATOR_SET.equals(name)) {
 				/*
 				logError(element,
 					"'" + TAG_ACCELERATOR + //$NON-NLS-1$
 					"', '" + TAG_ACCELERATOR_SET + //$NON-NLS-1$
 					"' and '" + TAG_ACCELERATOR_SETS + //$NON-NLS-1$
 					"' have been deprecated. please replace them with '" + Persistence.TAG_REGIONAL_KEY_BINDING + //$NON-NLS-1$
 					"' and '" + Persistence.TAG_REGIONAL_KEY_BINDINGS + //$NON-NLS-1$
 					"' in all places."); //$NON-NLS-1$
 				*/

 				if (DEPRECATED_TAG_ACCELERATOR.equals(name))
 					return readDeprecatedAccelerator(element);
 				else
 					return readDeprecatedAcceleratorSet(element);
 			}

 			if (DEPRECATED_TAG_ACCELERATOR_CONFIGURATION.equals(name)) {
 				/*
 				logError(element,
 					"'" + TAG_ACCELERATOR_CONFIGURATION + //$NON-NLS-1$
 					"' and '" + TAG_ACCELERATOR_CONFIGURATIONS + //$NON-NLS-1$
 					"' have been deprecated. please replace them with '" + Persistence.TAG_KEY_CONFIGURATION + //$NON-NLS-1$
 					"' and '" + Persistence.TAG_KEY_CONFIGURATIONS + //$NON-NLS-1$
 					"' in all places."); //$NON-NLS-1$
 				*/
 				return readKeyConfiguration(element);
 			}

 			if (DEPRECATED_TAG_ACCELERATOR_SCOPE.equals(name)) {
 				/*
 				logError(element,
 					"'" + TAG_ACCELERATOR_SCOPE + //$NON-NLS-1$
 					"' and '" + TAG_ACCELERATOR_SCOPES + //$NON-NLS-1$
 					"' have been deprecated. please replace them with '" + Persistence.TAG_SCOPE + //$NON-NLS-1$
 					"' and '" + Persistence.TAG_SCOPES + //$NON-NLS-1$
 					"' in all places."); //$NON-NLS-1$
 				*/
 				return readScope(element);
 			}

 			if (DEPRECATED_TAG_ACTION_DEFINITION.equals(name)) {
 				/*
 				logError(element,
 					"'" + TAG_ACTION_DEFINITION + //$NON-NLS-1$
 					"' and '" + TAG_ACTION_DEFINITIONS + //$NON-NLS-1$
 					"' have been deprecated. please replace them with '" + Persistence.TAG_COMMAND + //$NON-NLS-1$
 					"' and '" + Persistence.TAG_COMMANDS + //$NON-NLS-1$
 					"' in all places."); //$NON-NLS-1$
 				*/
 				return readCommand(element);
 			}

 			if (Persistence.TAG_ACTIVE_GESTURE_CONFIGURATION.equals(name))
 				return readActiveGestureConfiguration(element);

 			if (Persistence.TAG_ACTIVE_KEY_CONFIGURATION.equals(name))
 				return readActiveKeyConfiguration(element);

 			if (Persistence.TAG_CATEGORY.equals(name))
 				return readCategory(element);

 			if (Persistence.TAG_COMMAND.equals(name))
 				return readCommand(element);

 			if (Persistence.TAG_GESTURE_BINDING.equals(name))
 				return readGestureBinding(element);

 			if (Persistence.TAG_GESTURE_CONFIGURATION.equals(name))
 				return readGestureConfiguration(element);

 			if (Persistence.TAG_KEY_BINDING.equals(name))
 				return readKeyBinding(element);

 			if (Persistence.TAG_KEY_CONFIGURATION.equals(name))
 				return readKeyConfiguration(element);

 			if (Persistence.TAG_SCOPE.equals(name))
 				return readScope(element);

 			return false;
 		}

 		private String getPlugin(IConfigurationElement element) {
 			String plugin = null;

 			if (element != null) {
 				IExtension extension = element.getDeclaringExtension();

 				if (extension != null) {
 					IPluginDescriptor pluginDescriptor = extension.getDeclaringPluginDescriptor();

 					if (pluginDescriptor != null)
 						plugin = pluginDescriptor.getUniqueIdentifier();
 				}
 			}

 			return plugin;
 		}

 		private boolean readActiveGestureConfiguration(IConfigurationElement element) {
 			ActiveConfiguration activeGestureConfiguration = Persistence.readActiveConfiguration(ConfigurationElementMemento.create(element), getPlugin(element));

 			if (activeGestureConfiguration != null)
 				activeGestureConfigurations.add(activeGestureConfiguration);

 			return true;
 		}

 		private boolean readActiveKeyConfiguration(IConfigurationElement element) {
 			ActiveConfiguration activeKeyConfiguration = Persistence.readActiveConfiguration(ConfigurationElementMemento.create(element), getPlugin(element));

 			if (activeKeyConfiguration != null)
 				activeKeyConfigurations.add(activeKeyConfiguration);

 			return true;
 		}

 		private boolean readCategory(IConfigurationElement element) {
 			Category category = Persistence.readCategory(ConfigurationElementMemento.create(element), getPlugin(element));

 			if (category != null)
 				categories.add(category);

 			return true;
 		}

 		private boolean readCommand(IConfigurationElement element) {
 			Command command = Persistence.readCommand(ConfigurationElementMemento.create(element), getPlugin(element));

 			if (command != null)
 				commands.add(command);

 			return true;
 		}

 		private boolean readDeprecatedAccelerator(IConfigurationElement element) {
 			if (keyConfiguration == null || scope == null)
 				return false;

 			String id = element.getAttribute(Persistence.TAG_ID);
 			String key = element.getAttribute(DEPRECATED_TAG_KEY);

 			if (key != null) {
 				List sequences = new ArrayList();
 				StringTokenizer orTokenizer = new StringTokenizer(key, DEPRECATED_KEY_SEQUENCE_SEPARATOR);

 				while (orTokenizer.hasMoreTokens()) {
 					try {
 						Sequence sequence = KeySupport.parseSequence(orTokenizer.nextToken());

 						if (sequence.getStrokes().size() >= 1)
 							sequences.add(sequence);
 					} catch (IllegalArgumentException eIllegalArgument) {
 					}
 				}

 				if (sequences.size() >= 1) {
 					String locale = element.getAttribute(Persistence.TAG_LOCALE);

 					if (locale == null)
 						locale = Util.ZERO_LENGTH_STRING;

 					String platform = element.getAttribute(Persistence.TAG_PLATFORM);

 					if (platform == null)
 						platform = Util.ZERO_LENGTH_STRING;

 					String plugin = getPlugin(element);
 					Iterator iterator = sequences.iterator();

 					while (iterator.hasNext()) {
 						Sequence sequence = (Sequence) iterator.next();
 						keyBindings.add(SequenceBinding.create(keyConfiguration, id, locale, platform, plugin, RANK_CORE, scope, sequence));
 					}
 				}
 			}

 			return true;
 		}

 		private boolean readDeprecatedAcceleratorSet(IConfigurationElement element) {
 			keyConfiguration = element.getAttribute(DEPRECATED_TAG_CONFIGURATION_ID);
 			scope = element.getAttribute(DEPRECATED_TAG_SCOPE_ID);

 			if (keyConfiguration != null && scope != null)
 				readElementChildren(element);

 			keyConfiguration = null;
 			scope = null;
 			return true;
 		}

 		private boolean readGestureBinding(IConfigurationElement element) {
 			SequenceBinding gestureBinding = Persistence.readBinding(ConfigurationElementMemento.create(element), getPlugin(element), RANK_CORE);

 			if (gestureBinding != null)
 				gestureBindings.add(gestureBinding);

 			return true;
 		}

 		private boolean readGestureConfiguration(IConfigurationElement element) {
 			Configuration gestureConfiguration = Persistence.readConfiguration(ConfigurationElementMemento.create(element), getPlugin(element));

 			if (gestureConfiguration != null)
 				gestureConfigurations.add(gestureConfiguration);

 			return true;
 		}

 		private boolean readKeyBinding(IConfigurationElement element) {
 			SequenceBinding keyBinding = Persistence.readBinding(ConfigurationElementMemento.create(element), getPlugin(element), RANK_CORE);

 			if (keyBinding != null)
 				keyBindings.add(keyBinding);

 			return true;
 		}

 		private boolean readKeyConfiguration(IConfigurationElement element) {
 			Configuration keyConfiguration = Persistence.readConfiguration(ConfigurationElementMemento.create(element), getPlugin(element));

 			if (keyConfiguration != null)
 				keyConfigurations.add(keyConfiguration);

 			return true;
 		}

 		private boolean readScope(IConfigurationElement element) {
 			Scope scope = Persistence.readScope(ConfigurationElementMemento.create(element), getPlugin(element));

 			if (scope != null)
 				scopes.add(scope);

 			return true;
 		}
 	}

 	private static CoreRegistry instance;

 	public static CoreRegistry getInstance() {
 		if (instance == null)
 			instance = new CoreRegistry();

 		return instance;
 	}

 	private boolean loaded;

 	private CoreRegistry() {
 		super();
 	}

 	public void load()
 		throws IOException {
 		if (!loaded) {
 			new RegistryReader(Platform.getPluginRegistry());
 			loaded = true;
 		}
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2003 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Common Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/cpl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/

	package org.eclipse.ui.internal.commands;

	import java.io.IOException;
	import java.util.ArrayList;
	import java.util.Collections;
	import java.util.Iterator;
	import java.util.List;
	import java.util.StringTokenizer;

	import org.eclipse.core.runtime.IConfigurationElement;
	import org.eclipse.core.runtime.IExtension;
	import org.eclipse.core.runtime.IPluginDescriptor;
	import org.eclipse.core.runtime.IPluginRegistry;
	import org.eclipse.core.runtime.Platform;
	import org.eclipse.ui.PlatformUI;

	public final class CoreRegistry extends AbstractRegistry {

	private final class RegistryReader extends org.eclipse.ui.internal.registry.RegistryReader {

	private final static String DEPRECATED_KEY_SEQUENCE_SEPARATOR = "\|\|"; //$NON-NLS-1$
	private final static String DEPRECATED_TAG_ACCELERATOR = "accelerator"; //$NON-NLS-1$
	private final static String DEPRECATED_TAG_ACCELERATOR_CONFIGURATION = "acceleratorConfiguration"; //$NON-NLS-1$
	private final static String DEPRECATED_TAG_ACCELERATOR_CONFIGURATIONS = "acceleratorConfigurations"; //$NON-NLS-1$
	private final static String DEPRECATED_TAG_ACCELERATOR_SCOPE = "acceleratorScope"; //$NON-NLS-1$
	private final static String DEPRECATED_TAG_ACCELERATOR_SCOPES = "acceleratorScopes"; //$NON-NLS-1$
	private final static String DEPRECATED_TAG_ACCELERATOR_SET = "acceleratorSet"; //$NON-NLS-1$
	private final static String DEPRECATED_TAG_ACCELERATOR_SETS = "acceleratorSets"; //$NON-NLS-1$
	private final static String DEPRECATED_TAG_ACTION_DEFINITION = "actionDefinition"; //$NON-NLS-1$
	private final static String DEPRECATED_TAG_ACTION_DEFINITIONS = "actionDefinitions"; //$NON-NLS-1$
	private final static String DEPRECATED_TAG_CONFIGURATION_ID = "configurationId"; //$NON-NLS-1$
	private final static String DEPRECATED_TAG_KEY = "key"; //$NON-NLS-1$
	private final static String DEPRECATED_TAG_SCOPE_ID = "scopeId"; //$NON-NLS-1$
	private final static int RANK_CORE = 2;
	private final static String TAG_ROOT = Persistence.PACKAGE_BASE;

	private List activeGestureConfigurations;
	private List activeKeyConfigurations;
	private List categories;
	private List commands;
	private List gestureBindings;
	private List gestureConfigurations;
	private List keyBindings;
	private String keyConfiguration;
	private List keyConfigurations;
	private String scope;
	private List scopes;

	private RegistryReader(IPluginRegistry pluginRegistry) {
	super();
	activeGestureConfigurations = new ArrayList();
	activeKeyConfigurations = new ArrayList();
	categories = new ArrayList();
	commands = new ArrayList();
	gestureBindings = new ArrayList();
	gestureConfigurations = new ArrayList();
	keyBindings = new ArrayList();
	keyConfigurations = new ArrayList();
	scopes = new ArrayList();

	if (pluginRegistry != null) {
	readRegistry(pluginRegistry, PlatformUI.PLUGIN_ID, DEPRECATED_TAG_ACCELERATOR_CONFIGURATIONS);
	readRegistry(pluginRegistry, PlatformUI.PLUGIN_ID, DEPRECATED_TAG_ACCELERATOR_SCOPES);
	readRegistry(pluginRegistry, PlatformUI.PLUGIN_ID, DEPRECATED_TAG_ACCELERATOR_SETS);
	readRegistry(pluginRegistry, PlatformUI.PLUGIN_ID, DEPRECATED_TAG_ACTION_DEFINITIONS);
	readRegistry(pluginRegistry, PlatformUI.PLUGIN_ID, TAG_ROOT);
	}

	CoreRegistry.this.activeGestureConfigurations = Collections.unmodifiableList(activeGestureConfigurations);
	CoreRegistry.this.activeKeyConfigurations = Collections.unmodifiableList(activeKeyConfigurations);
	CoreRegistry.this.categories = Collections.unmodifiableList(categories);
	CoreRegistry.this.commands = Collections.unmodifiableList(commands);
	CoreRegistry.this.gestureBindings = Collections.unmodifiableList(gestureBindings);
	CoreRegistry.this.gestureConfigurations = Collections.unmodifiableList(gestureConfigurations);
	CoreRegistry.this.keyBindings = Collections.unmodifiableList(keyBindings);
	CoreRegistry.this.keyConfigurations = Collections.unmodifiableList(keyConfigurations);
	CoreRegistry.this.scopes = Collections.unmodifiableList(scopes);
	}

	protected boolean readElement(IConfigurationElement element) {
	String name = element.getName();

	if (DEPRECATED_TAG_ACCELERATOR.equals(name) \|\| DEPRECATED_TAG_ACCELERATOR_SET.equals(name)) {
	/*
	logError(element,
	"'" + TAG_ACCELERATOR + //$NON-NLS-1$
	"', '" + TAG_ACCELERATOR_SET + //$NON-NLS-1$
	"' and '" + TAG_ACCELERATOR_SETS + //$NON-NLS-1$
	"' have been deprecated. please replace them with '" + Persistence.TAG_REGIONAL_KEY_BINDING + //$NON-NLS-1$
	"' and '" + Persistence.TAG_REGIONAL_KEY_BINDINGS + //$NON-NLS-1$
	"' in all places."); //$NON-NLS-1$
	*/

	if (DEPRECATED_TAG_ACCELERATOR.equals(name))
	return readDeprecatedAccelerator(element);
	else
	return readDeprecatedAcceleratorSet(element);
	}

	if (DEPRECATED_TAG_ACCELERATOR_CONFIGURATION.equals(name)) {
	/*
	logError(element,
	"'" + TAG_ACCELERATOR_CONFIGURATION + //$NON-NLS-1$
	"' and '" + TAG_ACCELERATOR_CONFIGURATIONS + //$NON-NLS-1$
	"' have been deprecated. please replace them with '" + Persistence.TAG_KEY_CONFIGURATION + //$NON-NLS-1$
	"' and '" + Persistence.TAG_KEY_CONFIGURATIONS + //$NON-NLS-1$
	"' in all places."); //$NON-NLS-1$
	*/
	return readKeyConfiguration(element);
	}

	if (DEPRECATED_TAG_ACCELERATOR_SCOPE.equals(name)) {
	/*
	logError(element,
	"'" + TAG_ACCELERATOR_SCOPE + //$NON-NLS-1$
	"' and '" + TAG_ACCELERATOR_SCOPES + //$NON-NLS-1$
	"' have been deprecated. please replace them with '" + Persistence.TAG_SCOPE + //$NON-NLS-1$
	"' and '" + Persistence.TAG_SCOPES + //$NON-NLS-1$
	"' in all places."); //$NON-NLS-1$
	*/
	return readScope(element);
	}

	if (DEPRECATED_TAG_ACTION_DEFINITION.equals(name)) {
	/*
	logError(element,
	"'" + TAG_ACTION_DEFINITION + //$NON-NLS-1$
	"' and '" + TAG_ACTION_DEFINITIONS + //$NON-NLS-1$
	"' have been deprecated. please replace them with '" + Persistence.TAG_COMMAND + //$NON-NLS-1$
	"' and '" + Persistence.TAG_COMMANDS + //$NON-NLS-1$
	"' in all places."); //$NON-NLS-1$
	*/
	return readCommand(element);
	}

	if (Persistence.TAG_ACTIVE_GESTURE_CONFIGURATION.equals(name))
	return readActiveGestureConfiguration(element);

	if (Persistence.TAG_ACTIVE_KEY_CONFIGURATION.equals(name))
	return readActiveKeyConfiguration(element);

	if (Persistence.TAG_CATEGORY.equals(name))
	return readCategory(element);

	if (Persistence.TAG_COMMAND.equals(name))
	return readCommand(element);

	if (Persistence.TAG_GESTURE_BINDING.equals(name))
	return readGestureBinding(element);

	if (Persistence.TAG_GESTURE_CONFIGURATION.equals(name))
	return readGestureConfiguration(element);

	if (Persistence.TAG_KEY_BINDING.equals(name))
	return readKeyBinding(element);

	if (Persistence.TAG_KEY_CONFIGURATION.equals(name))
	return readKeyConfiguration(element);

	if (Persistence.TAG_SCOPE.equals(name))
	return readScope(element);

	return false;
	}

	private String getPlugin(IConfigurationElement element) {
	String plugin = null;

	if (element != null) {
	IExtension extension = element.getDeclaringExtension();

	if (extension != null) {
	IPluginDescriptor pluginDescriptor = extension.getDeclaringPluginDescriptor();

	if (pluginDescriptor != null)
	plugin = pluginDescriptor.getUniqueIdentifier();
	}
	}

	return plugin;
	}

	private boolean readActiveGestureConfiguration(IConfigurationElement element) {
	ActiveConfiguration activeGestureConfiguration = Persistence.readActiveConfiguration(ConfigurationElementMemento.create(element), getPlugin(element));

	if (activeGestureConfiguration != null)
	activeGestureConfigurations.add(activeGestureConfiguration);

	return true;
	}

	private boolean readActiveKeyConfiguration(IConfigurationElement element) {
	ActiveConfiguration activeKeyConfiguration = Persistence.readActiveConfiguration(ConfigurationElementMemento.create(element), getPlugin(element));

	if (activeKeyConfiguration != null)
	activeKeyConfigurations.add(activeKeyConfiguration);

	return true;
	}

	private boolean readCategory(IConfigurationElement element) {
	Category category = Persistence.readCategory(ConfigurationElementMemento.create(element), getPlugin(element));

	if (category != null)
	categories.add(category);

	return true;
	}

	private boolean readCommand(IConfigurationElement element) {
	Command command = Persistence.readCommand(ConfigurationElementMemento.create(element), getPlugin(element));

	if (command != null)
	commands.add(command);

	return true;
	}

	private boolean readDeprecatedAccelerator(IConfigurationElement element) {
	if (keyConfiguration == null \|\| scope == null)
	return false;

	String id = element.getAttribute(Persistence.TAG_ID);
	String key = element.getAttribute(DEPRECATED_TAG_KEY);

	if (key != null) {
	List sequences = new ArrayList();
	StringTokenizer orTokenizer = new StringTokenizer(key, DEPRECATED_KEY_SEQUENCE_SEPARATOR);

	while (orTokenizer.hasMoreTokens()) {
	try {
	Sequence sequence = KeySupport.parseSequence(orTokenizer.nextToken());

	if (sequence.getStrokes().size() >= 1)
	sequences.add(sequence);
	} catch (IllegalArgumentException eIllegalArgument) {
	}
	}

	if (sequences.size() >= 1) {
	String locale = element.getAttribute(Persistence.TAG_LOCALE);

	if (locale == null)
	locale = Util.ZERO_LENGTH_STRING;

	String platform = element.getAttribute(Persistence.TAG_PLATFORM);

	if (platform == null)
	platform = Util.ZERO_LENGTH_STRING;

	String plugin = getPlugin(element);
	Iterator iterator = sequences.iterator();

	while (iterator.hasNext()) {
	Sequence sequence = (Sequence) iterator.next();
	keyBindings.add(SequenceBinding.create(keyConfiguration, id, locale, platform, plugin, RANK_CORE, scope, sequence));
	}
	}
	}

	return true;
	}

	private boolean readDeprecatedAcceleratorSet(IConfigurationElement element) {
	keyConfiguration = element.getAttribute(DEPRECATED_TAG_CONFIGURATION_ID);
	scope = element.getAttribute(DEPRECATED_TAG_SCOPE_ID);

	if (keyConfiguration != null && scope != null)
	readElementChildren(element);

	keyConfiguration = null;
	scope = null;
	return true;
	}

	private boolean readGestureBinding(IConfigurationElement element) {
	SequenceBinding gestureBinding = Persistence.readBinding(ConfigurationElementMemento.create(element), getPlugin(element), RANK_CORE);

	if (gestureBinding != null)
	gestureBindings.add(gestureBinding);

	return true;
	}

	private boolean readGestureConfiguration(IConfigurationElement element) {
	Configuration gestureConfiguration = Persistence.readConfiguration(ConfigurationElementMemento.create(element), getPlugin(element));

	if (gestureConfiguration != null)
	gestureConfigurations.add(gestureConfiguration);

	return true;
	}

	private boolean readKeyBinding(IConfigurationElement element) {
	SequenceBinding keyBinding = Persistence.readBinding(ConfigurationElementMemento.create(element), getPlugin(element), RANK_CORE);

	if (keyBinding != null)
	keyBindings.add(keyBinding);

	return true;
	}

	private boolean readKeyConfiguration(IConfigurationElement element) {
	Configuration keyConfiguration = Persistence.readConfiguration(ConfigurationElementMemento.create(element), getPlugin(element));

	if (keyConfiguration != null)
	keyConfigurations.add(keyConfiguration);

	return true;
	}

	private boolean readScope(IConfigurationElement element) {
	Scope scope = Persistence.readScope(ConfigurationElementMemento.create(element), getPlugin(element));

	if (scope != null)
	scopes.add(scope);

	return true;
	}
	}

	private static CoreRegistry instance;

	public static CoreRegistry getInstance() {
	if (instance == null)
	instance = new CoreRegistry();

	return instance;
	}

	private boolean loaded;

	private CoreRegistry() {
	super();
	}

	public void load()
	throws IOException {
	if (!loaded) {
	new RegistryReader(Platform.getPluginRegistry());
	loaded = true;
	}
	}
	}