PrefixTreeNode.java

/*
 * Copyright (C) 2009 JavaRosa
 *
 * 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.openrosa.client.jr.core.util;

import java.util.Enumeration;
import java.util.Vector;

public class PrefixTreeNode {
	public String prefix;
	public boolean terminal;
	public Vector children;
	
	public PrefixTreeNode (String prefix) {
		this.prefix = prefix;
		this.terminal = false;
	}
	
	public void decompose (Vector v, String s) {
		String stem = s + prefix;
		
		if (terminal)
			v.addElement(stem);
		
		if (children != null) {
			for (Enumeration e = children.elements(); e.hasMoreElements(); ) {
				((PrefixTreeNode)e.nextElement()).decompose(v, stem);
			}
		}		
	}
	
	public boolean equals (Object o) {
		return (o instanceof PrefixTreeNode ? prefix.equals(((PrefixTreeNode)o).prefix) : false);
	}
	
	public String toString () {
		StringBuffer sb = new StringBuffer();
		sb.append("{");
		sb.append(prefix);
		if (terminal)
			sb.append("*");
		if (children != null) {
			for (Enumeration e = children.elements(); e.hasMoreElements(); ) {
				sb.append(((PrefixTreeNode)e.nextElement()).toString());
			}
		}
		sb.append("}");
		return sb.toString();
	}
}