/*
* Copyright 2005 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.eclipse.flow.common.editor.core.command;
import java.util.List;
import org.drools.eclipse.flow.common.editor.core.ElementConnection;
import org.drools.eclipse.flow.common.editor.core.ElementWrapper;
import org.eclipse.gef.commands.Command;
/**
* A command for reconnecting the source of a connection.
*/
public class ReconnectElementConnectionSourceCommand extends Command {
private ElementConnection connection;
private ElementWrapper target;
private ElementWrapper oldSource;
private ElementWrapper newSource;
public boolean canExecute() {
if (connection.getTarget().equals(newSource))
return false;
List connections = newSource.getOutgoingConnections();
for (int i = 0; i < connections.size(); i++) {
ElementConnection connection = ((ElementConnection)(connections.get(i)));
if (connection.getTarget().equals(target) && !connection.getSource().equals(oldSource))
return false;
}
return newSource.acceptsOutgoingConnection(connection, target); //XXX
}
public void execute() {
if (newSource != null) {
connection.disconnect();
connection.connect(newSource, target);
}
}
public void setSource(ElementWrapper source) {
this.newSource = source;
}
public void setConnection(ElementConnection connection) {
this.connection = connection;
this.target = connection.getTarget();
this.oldSource = connection.getSource();
}
public void undo() {
connection.disconnect();
connection.connect(oldSource, target);
}
public void redo() {
connection.disconnect();
connection.connect(newSource, target);
}
}