2003-01-13 17:58:47 +01:00
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/**
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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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2003-01-17 21:34:50 +01:00
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* contact webmaster@jivesoftware.com.
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2003-01-13 17:58:47 +01:00
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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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2003-10-13 02:40:11 +02:00
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* Implements the logical AND operation over two or more packet filters.
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* In other words, packets pass this filter if they pass <b>all</b> of the filters.
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2003-01-13 17:58:47 +01:00
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*
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* @author Matt Tucker
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*/
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public class AndFilter implements PacketFilter {
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2003-10-13 02:40:11 +02:00
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/**
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* The current number of elements in the filter.
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*/
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private int size;
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/**
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* The list of filters.
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*/
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private PacketFilter [] filters;
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2003-01-13 17:58:47 +01:00
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/**
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2003-10-13 02:40:11 +02:00
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* Creates an empty AND filter. Filters should be added using the
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2004-03-11 16:55:44 +01:00
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* {@link #addFilter(PacketFilter)} method.
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2003-10-13 02:40:11 +02:00
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*/
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public AndFilter() {
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size = 0;
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filters = new PacketFilter[3];
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}
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/**
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* Creates an AND filter using the two specified filters.
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2003-01-13 17:58:47 +01:00
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*
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* @param filter1 the first packet filter.
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* @param filter2 the second packet filter.
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*/
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public AndFilter(PacketFilter filter1, PacketFilter filter2) {
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if (filter1 == null || filter2 == null) {
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throw new IllegalArgumentException("Parameters cannot be null.");
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}
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2003-10-13 02:40:11 +02:00
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size = 2;
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filters = new PacketFilter[2];
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filters[0] = filter1;
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filters[1] = filter2;
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}
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/**
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* Adds a filter to the filter list for the AND operation. A packet
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* will pass the filter if all of the filters in the list accept it.
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*
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* @param filter a filter to add to the filter list.
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*/
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public void addFilter(PacketFilter filter) {
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if (filter == null) {
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throw new IllegalArgumentException("Parameter cannot be null.");
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}
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// If there is no more room left in the filters array, expand it.
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if (size == filters.length) {
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PacketFilter [] newFilters = new PacketFilter[filters.length+2];
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for (int i=0; i<filters.length; i++) {
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newFilters[i] = filters[i];
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}
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filters = newFilters;
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}
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// Add the new filter to the array.
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filters[size] = filter;
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size++;
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2003-01-13 17:58:47 +01:00
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}
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public boolean accept(Packet packet) {
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2003-10-13 02:40:11 +02:00
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for (int i=0; i<size; i++) {
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if (!filters[i].accept(packet)) {
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return false;
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}
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}
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return true;
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}
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public String toString() {
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return filters.toString();
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2003-01-13 17:58:47 +01:00
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}
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}
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