| /******************************************************************************* |
| * Copyright (c) 2004, 2005 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.commands.contexts; |
| |
| import org.eclipse.core.commands.common.AbstractNamedHandleEvent; |
| |
| /** |
| * An instance of this class describes changes to an instance of |
| * <code>IContext</code>. |
| * <p> |
| * This class is not intended to be extended by clients. |
| * </p> |
| * |
| * @since 3.1 |
| * @see IContextListener#contextChanged(ContextEvent) |
| */ |
| public final class ContextEvent extends AbstractNamedHandleEvent { |
| |
| /** |
| * The bit used to represent whether the context has changed its parent. |
| */ |
| private static final int CHANGED_PARENT_ID = LAST_USED_BIT << 1; |
| |
| /** |
| * The context that has changed. This value is never <code>null</code>. |
| */ |
| private final Context context; |
| |
| /** |
| * Creates a new instance of this class. |
| * |
| * @param context |
| * the instance of the interface that changed; must not be |
| * <code>null</code>. |
| * @param definedChanged |
| * <code>true</code>, iff the defined property changed. |
| * @param nameChanged |
| * <code>true</code>, iff the name property changed. |
| * @param descriptionChanged |
| * <code>true</code>, iff the description property changed. |
| * @param parentIdChanged |
| * <code>true</code>, iff the parentId property changed. |
| */ |
| public ContextEvent(final Context context, final boolean definedChanged, |
| final boolean nameChanged, final boolean descriptionChanged, |
| final boolean parentIdChanged) { |
| super(definedChanged, descriptionChanged, nameChanged); |
| |
| if (context == null) |
| throw new NullPointerException(); |
| this.context = context; |
| |
| if (parentIdChanged) { |
| changedValues |= CHANGED_PARENT_ID; |
| } |
| } |
| |
| /** |
| * Returns the instance of the interface that changed. |
| * |
| * @return the instance of the interface that changed. Guaranteed not to be |
| * <code>null</code>. |
| */ |
| public final Context getContext() { |
| return context; |
| } |
| |
| /** |
| * Returns whether or not the parentId property changed. |
| * |
| * @return <code>true</code>, iff the parentId property changed. |
| */ |
| public final boolean isParentIdChanged() { |
| return ((changedValues & CHANGED_PARENT_ID) != 0); |
| } |
| } |