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/* *******************************************************************
 * Copyright (c) 1999-2001 Xerox Corporation, 
 *               2002 Palo Alto Research Center, Incorporated (PARC).
 * 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: 
 *     Xerox/PARC     initial implementation 
 * ******************************************************************/

 
package org.aspectj.ajde.ui;

import java.io.*;
import java.util.List;

import org.aspectj.asm.IProgramElement;

/**
 * @author Mik Kersten
 */ 
public interface IStructureViewNode {
	
	public IProgramElement getStructureNode();
	
	public AbstractIcon getIcon();
	
	/**
	 * Add a child node.
	 */
	public void add(IStructureViewNode child);

	/**
	 * Add a child node.
	 */
	public void add(IStructureViewNode child, int position);
	
	/**
	 * Remove a child node.
	 */
	public void remove(IStructureViewNode child);
	
	/**
	 * @return	an empty list if there are no children
	 */
	public List getChildren();
	
	public Kind getKind();
	
	public String getRelationshipName();
	
	/**
	 * Uses "typesafe enum" pattern.
	 */
	public static class Kind implements Serializable {
		
		private static final long serialVersionUID = 6730849292562214877L;
		
		public static final Kind DECLARATION = new Kind("declaration");
		public static final Kind RELATIONSHIP = new Kind("relationship");
		public static final Kind LINK = new Kind("link");
		public static final Kind[] ALL = { DECLARATION, RELATIONSHIP, LINK };
		private final String name;
		
		private Kind(String name) {
			this.name = name; 
		}
		
		public String toString() {
			return name;
		}	

		// The 4 declarations below are necessary for serialization
		private static int nextOrdinal = 0;
		private final int ordinal = nextOrdinal++;
		private Object readResolve() throws ObjectStreamException {
			return ALL[ordinal];
		}
	}
}




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