/**
* Copyright (c) 2002-2006 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 - Initial API and implementation
*/
package org.eclipse.emf.mapping.command;
import java.util.Collection;
import org.eclipse.emf.common.command.IdentityCommand;
import org.eclipse.emf.edit.command.CopyCommand;
import org.eclipse.emf.edit.command.CopyToClipboardCommand;
import org.eclipse.emf.mapping.domain.MappingDomain;
/**
* This command overrides the CopyToClipboardCommand for cross-domain copies.
*/
public class CopyToClipboardOverrideCommand extends CopyToClipboardCommand
{
/**
* This is the collection of read-only (input) objects that don't need to actually be copied.
*/
protected Collection<?> inputObjects;
/**
* This constructs a command that copies the given collections of objects to the clipboard.
*/
public CopyToClipboardOverrideCommand(MappingDomain domain, Collection<?> nonInputObjects, Collection<?> inputObjects)
{
super(domain, nonInputObjects);
this.inputObjects = inputObjects;
}
@Override
protected boolean prepare()
{
// Since input objects are read-only, we don't need to make a copy of them for the clipboard.
// We can just put a pointer to the original object(s) on the clipboard.
//
copyCommand = new IdentityCommand(inputObjects);
// Do we also have some non-input objects to copy?
//
if (sourceObjects.size() > 0)
{
copyCommand = copyCommand.chain(CopyCommand.create(domain, sourceObjects));
}
return copyCommand.canExecute();
}
}