| /******************************************************************************* |
| * 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.ui.contexts; |
| |
| import java.util.Set; |
| |
| import org.eclipse.ui.internal.util.Util; |
| |
| /** |
| * An instance of this class describes changes to an instance of |
| * <code>IContextManager</code>. |
| * <p> |
| * This class is not intended to be extended by clients. |
| * </p> |
| * |
| * @since 3.0 |
| * @see IContextManagerListener#contextManagerChanged(ContextManagerEvent) |
| * @deprecated Please use the "org.eclipse.core.commands" plug-in instead. |
| * @see org.eclipse.core.commands.contexts.ContextManagerEvent |
| */ |
| public final class ContextManagerEvent { |
| |
| /** |
| * The context manager which has changed. This value is never |
| * <code>null</code>. |
| */ |
| private final IContextManager contextManager; |
| |
| /** |
| * Whether the set of defined contexts has changed. |
| */ |
| private final boolean definedContextIdsChanged; |
| |
| /** |
| * Whether the set of enabled contexts has changed. |
| */ |
| private final boolean enabledContextIdsChanged; |
| |
| /** |
| * The set of context identifiers (strings) that were defined before the |
| * change occurred. If the defined contexts did not changed, then this value |
| * is <code>null</code>. |
| */ |
| private final Set previouslyDefinedContextIds; |
| |
| /** |
| * The set of context identifiers (strings) that were enabled before the |
| * change occurred. If the enabled contexts did not changed, then this value |
| * is <code>null</code>. |
| */ |
| private final Set previouslyEnabledContextIds; |
| |
| /** |
| * Creates a new instance of this class. |
| * |
| * @param contextManager |
| * the instance of the interface that changed. |
| * @param definedContextIdsChanged |
| * true, iff the definedContextIds property changed. |
| * @param enabledContextIdsChanged |
| * true, iff the enabledContextIds property changed. |
| * @param previouslyDefinedContextIds |
| * the set of identifiers to previously defined contexts. This |
| * set may be empty. If this set is not empty, it must only |
| * contain instances of <code>String</code>. This set must be |
| * <code>null</code> if definedContextIdsChanged is |
| * <code>false</code> and must not be null if |
| * definedContextIdsChanged is <code>true</code>. |
| * @param previouslyEnabledContextIds |
| * the set of identifiers to previously enabled contexts. This |
| * set may be empty. If this set is not empty, it must only |
| * contain instances of <code>String</code>. This set must be |
| * <code>null</code> if enabledContextIdsChanged is |
| * <code>false</code> and must not be null if |
| * enabledContextIdsChanged is <code>true</code>. |
| */ |
| public ContextManagerEvent(IContextManager contextManager, |
| boolean definedContextIdsChanged, boolean enabledContextIdsChanged, |
| Set previouslyDefinedContextIds, Set previouslyEnabledContextIds) { |
| if (contextManager == null) { |
| throw new NullPointerException(); |
| } |
| |
| if (!definedContextIdsChanged && previouslyDefinedContextIds != null) { |
| throw new IllegalArgumentException(); |
| } |
| |
| if (!enabledContextIdsChanged && previouslyEnabledContextIds != null) { |
| throw new IllegalArgumentException(); |
| } |
| |
| if (definedContextIdsChanged) { |
| this.previouslyDefinedContextIds = Util.safeCopy( |
| previouslyDefinedContextIds, String.class); |
| } else { |
| this.previouslyDefinedContextIds = null; |
| } |
| |
| if (enabledContextIdsChanged) { |
| this.previouslyEnabledContextIds = Util.safeCopy( |
| previouslyEnabledContextIds, String.class); |
| } else { |
| this.previouslyEnabledContextIds = null; |
| } |
| |
| this.contextManager = contextManager; |
| this.definedContextIdsChanged = definedContextIdsChanged; |
| this.enabledContextIdsChanged = enabledContextIdsChanged; |
| } |
| |
| /** |
| * Returns the instance of the interface that changed. |
| * |
| * @return the instance of the interface that changed. Guaranteed not to be |
| * <code>null</code>. |
| */ |
| public IContextManager getContextManager() { |
| return contextManager; |
| } |
| |
| /** |
| * Returns the set of identifiers to previously defined contexts. |
| * |
| * @return the set of identifiers to previously defined contexts. This set |
| * may be empty. If this set is not empty, it is guaranteed to only |
| * contain instances of <code>String</code>. This set is |
| * guaranteed to be <code>null</code> if |
| * haveDefinedContextIdsChanged() is <code>false</code> and is |
| * guaranteed to not be null if haveDefinedContextIdsChanged() is |
| * <code>true</code>. |
| */ |
| public Set getPreviouslyDefinedContextIds() { |
| return previouslyDefinedContextIds; |
| } |
| |
| /** |
| * Returns the set of identifiers to previously enabled contexts. |
| * |
| * @return the set of identifiers to previously enabled contexts. This set |
| * may be empty. If this set is not empty, it is guaranteed to only |
| * contain instances of <code>String</code>. This set is |
| * guaranteed to be <code>null</code> if |
| * haveEnabledContextIdsChanged() is <code>false</code> and is |
| * guaranteed to not be null if haveEnabledContextIdsChanged() is |
| * <code>true</code>. |
| */ |
| public Set getPreviouslyEnabledContextIds() { |
| return previouslyEnabledContextIds; |
| } |
| |
| /** |
| * Returns whether or not the definedContextIds property changed. |
| * |
| * @return true, iff the definedContextIds property changed. |
| */ |
| public boolean haveDefinedContextIdsChanged() { |
| return definedContextIdsChanged; |
| } |
| |
| /** |
| * Returns whether or not the enabledContextIds property changed. |
| * |
| * @return true, iff the enabledContextIds property changed. |
| */ |
| public boolean haveEnabledContextIdsChanged() { |
| return enabledContextIdsChanged; |
| } |
| } |