96 lines
4.0 KiB
Java
96 lines
4.0 KiB
Java
/**
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* $RCSfile$
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* $Revision$
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* $Date$
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*
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* Copyright (C) 2002-2003 Jive Software. All rights reserved.
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* ====================================================================
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* The Jive Software License (based on Apache Software License, Version 1.1)
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. The end-user documentation included with the redistribution,
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* if any, must include the following acknowledgment:
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* "This product includes software developed by
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* Jive Software (http://www.jivesoftware.com)."
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* Alternately, this acknowledgment may appear in the software itself,
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* if and wherever such third-party acknowledgments normally appear.
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*
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* 4. The names "Smack" and "Jive Software" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please
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* contact webmaster@coolservlets.com.
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*
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* 5. Products derived from this software may not be called "Smack",
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* nor may "Smack" appear in their name, without prior written
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* permission of Jive Software.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL JIVE SOFTWARE OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* ====================================================================
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*/
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package org.jivesoftware.smack.filter;
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import org.jivesoftware.smack.packet.Packet;
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/**
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* Defines a way to filter packets for particular attributes. Packet filters are
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* used when constructing packet listeners or collectors -- the filter defines
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* what packets match the criteria of the collector or listener for further
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* packet processing.<p>
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*
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* Several pre-defined filters are defined. These filters can be logically combined
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* for more complex packet filtering by using the
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* {@link org.jivesoftware.smack.filter.AndFilter AndFilter} and
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* {@link org.jivesoftware.smack.filter.OrFilter OrFilter} filters. It's also possible
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* to define your own filters by implementing this interface. The code example below
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* creates a trivial filter for packets with a specific ID.
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*
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* <pre>
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* // Use an anonymous inner class to define a packet filter that returns
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* // all packets that have a packet ID of "RS145".
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* PacketFilter myFilter = new PacketFilter() {
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* public boolean accept(Packet packet) {
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* return "RS145".equals(packet.getPacketID());
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* }
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* };
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* // Create a new packet collector using the filter we created.
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* PacketCollector myCollector = packetReader.createPacketCollector(myFilter);
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* </pre>
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*
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* @see org.jivesoftware.smack.PacketCollector
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* @see org.jivesoftware.smack.PacketListener
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* @author Matt Tucker
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*/
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public interface PacketFilter {
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/**
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* Tests whether or not the specified packet should pass the filter.
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*
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* @param packet the packet to test.
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* @return true if and only if <tt>packet</tt> passes the filter.
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*/
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public boolean accept(Packet packet);
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}
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