001/**
002 *
003 * Copyright © 2014 Florian Schmaus
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.Message;
021
022/**
023 * Filters message stanzas which have at least one body.
024 */
025public final class MessageWithSubjectFilter extends FlexibleStanzaTypeFilter<Message> {
026
027    public static final StanzaFilter INSTANCE = new MessageWithSubjectFilter();
028
029    private MessageWithSubjectFilter() {
030        super(Message.class);
031    }
032
033    @Override
034    protected boolean acceptSpecific(Message message) {
035        // Accept only messages which have a subject set
036        return message.getSubject() != null;
037    }
038
039    @Override
040    public String toString() {
041        return getClass().getSimpleName();
042    }
043}