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}