| /******************************************************************************* |
| * 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.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.eclipse.ui.commands.ICommandService; |
| import org.eclipse.ui.commands.ICommandServiceEvent; |
| import org.eclipse.ui.commands.ICommandServiceListener; |
| import org.eclipse.ui.internal.util.Util; |
| |
| public final class CommandService implements ICommandService { |
| |
| private Set activeCommandIds = new HashSet(); |
| private List commandServiceListeners; |
| |
| public CommandService() { |
| } |
| |
| public void addCommandServiceListener(ICommandServiceListener commandServiceListener) { |
| if (commandServiceListener == null) |
| throw new NullPointerException(); |
| |
| if (commandServiceListeners == null) |
| commandServiceListeners = new ArrayList(); |
| |
| if (!commandServiceListeners.contains(commandServiceListener)) |
| commandServiceListeners.add(commandServiceListener); |
| } |
| |
| public Set getActiveCommandIds() { |
| return Collections.unmodifiableSet(activeCommandIds); |
| } |
| |
| public void removeCommandServiceListener(ICommandServiceListener commandServiceListener) { |
| if (commandServiceListener == null) |
| throw new NullPointerException(); |
| |
| if (commandServiceListeners != null) |
| commandServiceListeners.remove(commandServiceListener); |
| } |
| |
| public void setActiveCommandIds(Set activeCommandIds) { |
| activeCommandIds = Util.safeCopy(activeCommandIds, String.class); |
| boolean commandServiceChanged = false; |
| Map commandEventsByCommandId = null; |
| |
| if (!this.activeCommandIds.equals(activeCommandIds)) { |
| this.activeCommandIds = activeCommandIds; |
| fireCommandServiceChanged(new CommandServiceEvent(this, true)); |
| } |
| } |
| |
| private void fireCommandServiceChanged(ICommandServiceEvent commandServiceEvent) { |
| if (commandServiceEvent == null) |
| throw new NullPointerException(); |
| |
| if (commandServiceListeners != null) |
| for (int i = 0; i < commandServiceListeners.size(); i++) |
| ((ICommandServiceListener) commandServiceListeners.get(i)).commandServiceChanged(commandServiceEvent); |
| } |
| } |