AddCommand.java

/*
 * Copyright 2005 Pi4 Technologies Ltd
 *
 * 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.
 *
 *
 * Change History:
 * Jul 16, 2005 : Initial version created by gary
 */
package org.savara.tools.scenario.designer.commands;

import org.eclipse.gef.commands.Command;
import org.savara.scenario.model.*;
import org.savara.tools.scenario.designer.model.ModelSupport;

/**
 * This command represents an orphaned child.
 */
public class AddCommand extends Command {

	public AddCommand () {
		super("AddChild");
	}

	public boolean canExecute() {
		boolean ret=false;
		
		if (m_newParent != null && m_oldParent != null &&
				m_child != null &&
				m_newParent != m_oldParent) {
			ret = true;
		}
		
		return(ret);
	}

	public void execute() {
		java.util.List list=ModelSupport.getChildren(m_oldParent);
		
		// Check if child is a scenario event
		if (m_child instanceof RoleEvent &&
				m_role != null) {
			m_oldRole = (Role)((RoleEvent)m_child).getRole();
			
			((RoleEvent)m_child).setRole(m_role);
		}
		
		m_oldIndex = list.indexOf(m_child);
		
		ModelSupport.removeChild(m_oldParent, m_child);
		ModelSupport.addChild(m_newParent, m_child, m_index);
	}

	public void redo() {
		execute();
	}

	public void setChild(Object child) {
		m_child = child;
	}

	public void setNewParent(Object parent) { 
		m_newParent = parent;
	}

	public void setOldParent(Object parent) { 
		m_oldParent = parent;
	}

	public void setRole(Role participant) {
		m_role = participant;
	}
	
	public void setIndex(int index) {
		m_index = index;
	}

	public void undo() {
		ModelSupport.removeChild(m_newParent, m_child);

		// Check if child is a scenario event
		if (m_child instanceof RoleEvent &&
				m_role != null) {
			((RoleEvent)m_child).setRole(m_oldRole);
		}
		
		ModelSupport.addChild(m_oldParent, m_child, m_oldIndex);
	}

	private Object m_newParent;
	private Object m_oldParent;
	private Object m_child;
	private int m_oldIndex=0;
	private int m_index=-1;
	private Role m_role=null;
	private Role m_oldRole=null;
}