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/**
* $RCSfile$
* $Revision$
* $Date$
*
* Copyright 2003-2007 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smack.filter;
import org.jivesoftware.smack.packet.Packet;
import java.util.List;
import java.util.ArrayList;
/**
* Implements the logical AND operation over two or more packet filters.
* In other words, packets pass this filter if they pass <b>all</b> of the filters.
*
* @author Matt Tucker
*/
public class AndFilter implements PacketFilter {
/**
* The list of filters.
*/
private List<PacketFilter> filters = new ArrayList<PacketFilter>();
/**
* Creates an empty AND filter. Filters should be added using the
* {@link #addFilter(PacketFilter)} method.
*/
public AndFilter() {
}
/**
* Creates an AND filter using the specified filters.
*
* @param filters the filters to add.
*/
public AndFilter(PacketFilter... filters) {
if (filters == null) {
throw new IllegalArgumentException("Parameter cannot be null.");
}
for(PacketFilter filter : filters) {
if(filter == null) {
throw new IllegalArgumentException("Parameter cannot be null.");
}
this.filters.add(filter);
}
}
/**
* Adds a filter to the filter list for the AND operation. A packet
* will pass the filter if all of the filters in the list accept it.
*
* @param filter a filter to add to the filter list.
*/
public void addFilter(PacketFilter filter) {
if (filter == null) {
throw new IllegalArgumentException("Parameter cannot be null.");
}
filters.add(filter);
}
public boolean accept(Packet packet) {
for (PacketFilter filter : filters) {
if (!filter.accept(packet)) {
return false;
}
}
return true;
}
public String toString() {
return filters.toString();
}
}
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