001/**
002 *
003 * Copyright 2003-2007 Jive Software.
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package org.jivesoftware.smack.filter;
019
020import org.jivesoftware.smack.packet.Packet;
021import org.jivesoftware.smack.packet.Message;
022
023/**
024 * Filters for message packets with a particular thread value.
025 *
026 * @author Matt Tucker
027 */
028public class ThreadFilter implements PacketFilter {
029
030    private String thread;
031
032    /**
033     * Creates a new thread filter using the specified thread value.
034     *
035     * @param thread the thread value to filter for.
036     */
037    public ThreadFilter(String thread) {
038        if (thread == null) {
039            throw new IllegalArgumentException("Thread must not be null.");
040        }
041        this.thread = thread;
042    }
043
044    public boolean accept(Packet packet) {
045        return packet instanceof Message && thread.equals(((Message) packet).getThread());
046    }
047}