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 */
017package org.jivesoftware.smackx.delay.filter;
018
019import org.jivesoftware.smack.filter.NotFilter;
020import org.jivesoftware.smack.filter.StanzaFilter;
021import org.jivesoftware.smack.packet.Stanza;
022
023import org.jivesoftware.smackx.delay.DelayInformationManager;
024
025/**
026 * Filters stanza with delay information, ie. stanzas that got delayed for some reason
027 */
028public final class DelayedStanzaFilter implements StanzaFilter {
029
030    public static final StanzaFilter INSTANCE = new DelayedStanzaFilter();
031
032    /**
033     * Filters stanzas that got not delayed, ie. have no delayed information
034     */
035    public static final StanzaFilter NOT_DELAYED_STANZA = new NotFilter(INSTANCE);
036
037    private DelayedStanzaFilter() {
038    }
039
040    @Override
041    public boolean accept(Stanza packet) {
042        return DelayInformationManager.isDelayedStanza(packet);
043    }
044
045}