deleteflowletcommand.java

一个java写的business process management系统

/*
 * Copyright (c) 2003, Alexander Greif
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Flow4J-Eclipse project nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

package net.orthanc.flow4j.designer.model.commands;

import java.util.ArrayList;
import java.util.List;

import net.orthanc.flow4j.designer.model.FlowDiagramModelPart;
import net.orthanc.flow4j.designer.model.FlowletModelPart;
import net.orthanc.flow4j.designer.model.TransitionModelPart;

import org.eclipse.gef.commands.Command;

/**
 * @author agreif
 *
 * TODO
 * 
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class DeleteFlowletCommand extends Command {


	private FlowletModelPart child;
	private FlowDiagramModelPart parent;
	private int index = -1;
	private List sourceConnections = new ArrayList();
	private List targetConnections = new ArrayList();




	/**
	 * TODO
	 * 
	 */
	public DeleteFlowletCommand() {
		super();
		// TODO Auto-generated constructor stub
	}

	/**
	 * TODO
	 * @param label
	 */
	public DeleteFlowletCommand(String label) {
		super(label);
		// TODO Auto-generated constructor stub
	}




	/**
	 * TODO
	 * @param c
	 */
	public void setChild (FlowletModelPart c) {
		child = c;
	}

	/**
	 * TODO
	 * @param p
	 */
	public void setParent(FlowDiagramModelPart p) {
		parent = p;
	}



	/**
	 * TODO
	 * @param part
	 */
	private void deleteConnections(FlowletModelPart part) {
		sourceConnections.addAll(((FlowletModelPart)part).getSourceTransitions());
		for (int i = 0; i < sourceConnections.size(); i++) {
			TransitionModelPart t = (TransitionModelPart)sourceConnections.get(i);
			t.detachSource();
			t.detachTarget();
		}
		targetConnections.addAll(((FlowletModelPart)part).getTargetTransitions());
		for (int i = 0; i < targetConnections.size(); i++) {
			TransitionModelPart t = (TransitionModelPart)targetConnections.get(i);
			t.detachSource();
			t.detachTarget();
		}
	}


	/**
	 * @see org.eclipse.gef.commands.Command#execute()
	 */
	public void execute() {
		primExecute();
	}

	/**
	 * TODO
	 * 
	 */
	protected void primExecute() {
		deleteConnections(child);
		index = parent.getChildren().indexOf(child);
		parent.removeChild(child);
	}

	/**
	 * @see org.eclipse.gef.commands.Command#redo()
	 */
	public void redo() {
		primExecute();
	}

	/**
	 * TODO
	 * 
	 */
	private void restoreConnections() {
		for (int i = 0; i < sourceConnections.size(); i++) {
			TransitionModelPart t = (TransitionModelPart)sourceConnections.get(i);
			t.attachSource();
			t.attachTarget();
		}
		sourceConnections.clear();
		for (int i = 0; i < targetConnections.size(); i++) {
			TransitionModelPart t = (TransitionModelPart)targetConnections.get(i);
			t.attachSource();
			t.attachTarget();
		}
		targetConnections.clear();
	}


	/**
	 * @see org.eclipse.gef.commands.Command#undo()
	 */
	public void undo() {
		parent.addChild(child, index);
		restoreConnections();
	}




	/**
	 * TODO
	 * @return
	 */
	protected FlowletModelPart getChild() {
		return child;
	}

	/**
	 * TODO
	 * @return
	 */
	protected FlowDiagramModelPart getParent() {
		return parent;
	}

}