90 lines
2.5 KiB
Java
90 lines
2.5 KiB
Java
/**
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*
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* Copyright 2003-2007 Jive Software.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smack.filter;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import org.jivesoftware.smack.packet.Packet;
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/**
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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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*
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* @author Matt Tucker
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*/
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public class AndFilter implements PacketFilter {
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/**
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* The list of filters.
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*/
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private final List<PacketFilter> filters;
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/**
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* Creates an empty AND filter. Filters should be added using the
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* {@link #addFilter(PacketFilter)} method.
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*/
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public AndFilter() {
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filters = new ArrayList<PacketFilter>();
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}
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/**
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* Creates an AND filter using the specified filters.
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*
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* @param filters the filters to add.
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*/
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public AndFilter(PacketFilter... filters) {
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if (filters == null) {
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throw new IllegalArgumentException("Parameter must not be null.");
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}
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for(PacketFilter filter : filters) {
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if(filter == null) {
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throw new IllegalArgumentException("Parameter must not be null.");
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}
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}
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this.filters = new ArrayList<PacketFilter>(Arrays.asList(filters));
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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 must not be null.");
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}
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filters.add(filter);
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}
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public boolean accept(Packet packet) {
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for (PacketFilter filter : filters) {
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if (!filter.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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}
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}
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