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/*******************************************************************************
* Copyright (c) 2003, 2005 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 Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.draw2d.graph;
/**
* A <code>DirectedGraph</code> whose Nodes may be compound {@link Subgraph}s, which may
* contain other nodes. Any node in the graph may be parented by one subgraph. Since
* subgraphs are nodes, the source or target end of an {@link Edge} may be a subgraph.
* For additional restrictions, refer to the JavaDoc for the layout algorithm being used.
* <P>
* A CompoundDirectedGraph is passed to a graph layout, which will position all of the
* nodes, subgraphs, and edges in that graph. This class serves as the data structure for
* a layout algorithm.
*
* @author Randy Hudson
* @since 2.1.2
*/
public class CompoundDirectedGraph extends DirectedGraph {
/**
* For internal use only.
*/
public NodeList subgraphs = new NodeList();
/**
* For internal use only.
*/
public EdgeList containment = new EdgeList();
}