org.eclipse.gef.editpolicies.ConnectionEditPolicy Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2000, 2010, 2012 IBM Corporation, Gerhardt Informatics Kft. 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
* Gerhardt Informatics Kft. - GEFGWT port
*******************************************************************************/
package org.eclipse.gef.editpolicies;
import org.eclipse.gef.Request;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.requests.GroupRequest;
/**
* A model-based EditPolicy for connections. A model-based EditPolicy only knows
* about the host's model and the basic operations it supports. By default,
* ConnectionEditPolicy understands only DELETE. Subclasses can add support to
* handle additional behavior specific to the model.
*
* This EditPolicy is not a
* {@link org.eclipse.gef.editpolicies.GraphicalEditPolicy}, and should not be
* used to show feedback or interact with the host's visuals in any way.
*
* @since 2.0
*/
public abstract class ConnectionEditPolicy extends AbstractEditPolicy {
/**
* @see org.eclipse.gef.EditPolicy#getCommand(Request)
*/
public Command getCommand(Request request) {
if (REQ_DELETE.equals(request.getType()))
return getDeleteCommand((GroupRequest) request);
return null;
}
/**
* Subclasses should implement to return the Command to delete the
* connection.
*
* @param request
* the DeleteRequest
* @return the Command to delete the connection
*/
protected abstract Command getDeleteCommand(GroupRequest request);
}