/******************************************************************************
 * Copyright (c) 2006 Remy Suen
 * 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, and also the MIT license, which
 * also accompanies this distribution. This dual licensing scheme allows a
 * developer to choose either license for use when developing applications with
 * this code.
 * 
 * Contributors:
 *     Remy Suen <remy.suen@gmail.com> - initial API and implementation
 ******************************************************************************/
package org.eclipse.bittorrent.internal.encode;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

public class BEncodedDictionary {
	
	private final ArrayList list;
	
	BEncodedDictionary() {
		list = new ArrayList();
	}
	
	public void put(Object key, Object value) {
		list.add(new Entry(key, value));
	}
	
	public Object get(Object key) {
		for (int i = 0; i < list.size(); i++) {
			Entry entry = (Entry) list.get(i);
			if (entry.getKey().equals(key)) {
				return entry.getValue();
			}
		}
		return null;
	}

	public String toString() {
		StringBuffer buffer = new StringBuffer();
		synchronized (buffer) {
			buffer.append('d');
			for (int i = 0; i < list.size(); i++) {
				Entry entry = (Entry) list.get(i);
				String key = (String) entry.getKey();
				Object value = entry.getValue();
				buffer.append(key.length()).append(':').append(key);
				if (value instanceof String) {
					String string = (String) value;
					buffer.append(string.length()).append(':').append(string);
				} else if (value instanceof Long) {
					buffer.append('i' + String.valueOf(value) + 'e');
				} else if (value instanceof List
						|| value instanceof BEncodedDictionary) {
					buffer.append(value.toString());
				}
			}
			buffer.append('e');
		}
		return buffer.toString();
	}
	
	public Iterator entryIterator() {
		return list.iterator();
	}
	
	public boolean containsKey(Object key) {
		for (int i = 0; i < list.size(); i++) {
			Entry entry = (Entry) list.get(i);
			if (entry.getKey().equals(key)) {
				return true;
			}
		}
		return false;
	}
	
	public boolean containsValue(Object value) {
		for (int i = 0; i < list.size(); i++) {
			Entry entry = (Entry) list.get(i);
			if (entry.getValue().equals(value)) {
				return true;
			}
		}
		return false;
	}
	
	private class Entry implements Map.Entry {
		
		private Object key;
		
		private Object value;
		
		private Entry(Object key, Object value) {
			this.key = key;
			this.value = value;
		}

		public Object getKey() {
			return key;
		}

		public Object getValue() {
			return value;
		}

		public Object setValue(Object value) {
			Object tempValue = this.value;
			this.value = value;
			return tempValue;
		}
		
	}

}