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.Stanza; 021import org.jivesoftware.smack.util.StringUtils; 022 023/** 024 * Filters for Stanzas with a particular stanza ID. 025 * 026 * @author Matt Tucker 027 */ 028public class StanzaIdFilter implements StanzaFilter { 029 030 private final String stanzaId; 031 032 /** 033 * Creates a new stanza ID filter using the specified stanza's ID. 034 * 035 * @param stanza the stanza which the ID is taken from. 036 */ 037 public StanzaIdFilter(Stanza stanza) { 038 this(stanza.getStanzaId()); 039 } 040 041 /** 042 * Creates a new stanza ID filter using the specified stanza ID. 043 * 044 * @param stanzaId the stanza ID to filter for. 045 */ 046 public StanzaIdFilter(String stanzaId) { 047 this.stanzaId = StringUtils.requireNotNullNorEmpty(stanzaId, "Stanza ID must not be null nor empty."); 048 } 049 050 @Override 051 public boolean accept(Stanza stanza) { 052 return stanzaId.equals(stanza.getStanzaId()); 053 } 054 055 @Override 056 public String toString() { 057 return getClass().getSimpleName() + ": id=" + stanzaId; 058 } 059}