removelibrarycommand.java

EMF、GEF官方例子源代码

/**
 * <copyright>
 *
 * Copyright (c) 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 - Initial API and implementation
 *
 * </copyright>
 *
 * $Id: RemoveLibraryCommand.java,v 1.1 2005/11/10 18:57:56 marcelop Exp $
 */
package org.eclipse.emf.examples.extlibrary.actions;

import java.util.Collection;

import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.edit.command.CommandActionDelegate;
import org.eclipse.emf.edit.command.RemoveCommand;
import org.eclipse.emf.edit.domain.AdapterFactoryEditingDomain;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.emf.edit.provider.IItemLabelProvider;

/**
 * The extended library example supports multi-rooted resources
 * and therefore this command will remove a library from the resource..
 */
public class RemoveLibraryCommand
	extends RemoveCommand
	implements CommandActionDelegate {

	/* Attribute for the adapter factory */
	private IItemLabelProvider labelProvider = null;

	/**
	 * Constructor
	 * 
	 * @param domain
	 *            the editing domain
	 * @param list
	 *            the list to modify
	 * @param collection
	 *            the objects to be removed
	 */
	public RemoveLibraryCommand(EditingDomain domain, EList list,
			Collection collection) {
		super(domain, list, collection);
		if (domain instanceof AdapterFactoryEditingDomain) {
			labelProvider = (IItemLabelProvider) ((AdapterFactoryEditingDomain) domain)
				.getAdapterFactory().adapt(collection.toArray()[0],
					IItemLabelProvider.class);
		}

		setLabel(LABEL);
		setDescription(DESCRIPTION);
	}

	/*
	 * @see org.eclipse.emf.edit.command.CommandActionDelegate#getImage()
	 */
	public Object getImage() {
		return this.labelProvider != null ? this.labelProvider
			.getImage(getCollection().toArray()[0])
			: null;
	}

	/*
	 * @see org.eclipse.emf.edit.command.CommandActionDelegate#getText()
	 */
	public String getText() {
		return this.labelProvider != null ? this.labelProvider
			.getText(getCollection().toArray()[0])
			: null;
	}

	/*
	 * @see org.eclipse.emf.edit.command.CommandActionDelegate#getToolTipText()
	 */
	public String getToolTipText() {
		return getText();
	}
}