| /** |
| * $RCSfile$ |
| * $Revision$ |
| * $Date$ |
| * |
| * 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; |
| |
| /** |
| * Implements the logical OR operation over two or more packet filters. In |
| * other words, packets pass this filter if they pass <b>any</b> of the filters. |
| * |
| * @author Matt Tucker |
| */ |
| public class OrFilter implements PacketFilter { |
| |
| /** |
| * The current number of elements in the filter. |
| */ |
| private int size; |
| |
| /** |
| * The list of filters. |
| */ |
| private PacketFilter [] filters; |
| |
| /** |
| * Creates an empty OR filter. Filters should be added using the |
| * {@link #addFilter(PacketFilter)} method. |
| */ |
| public OrFilter() { |
| size = 0; |
| filters = new PacketFilter[3]; |
| } |
| |
| /** |
| * Creates an OR filter using the two specified filters. |
| * |
| * @param filter1 the first packet filter. |
| * @param filter2 the second packet filter. |
| */ |
| public OrFilter(PacketFilter filter1, PacketFilter filter2) { |
| if (filter1 == null || filter2 == null) { |
| throw new IllegalArgumentException("Parameters cannot be null."); |
| } |
| size = 2; |
| filters = new PacketFilter[2]; |
| filters[0] = filter1; |
| filters[1] = filter2; |
| } |
| |
| /** |
| * Adds a filter to the filter list for the OR operation. A packet |
| * will pass the filter if any filter in the list accepts 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."); |
| } |
| // If there is no more room left in the filters array, expand it. |
| if (size == filters.length) { |
| PacketFilter [] newFilters = new PacketFilter[filters.length+2]; |
| for (int i=0; i<filters.length; i++) { |
| newFilters[i] = filters[i]; |
| } |
| filters = newFilters; |
| } |
| // Add the new filter to the array. |
| filters[size] = filter; |
| size++; |
| } |
| |
| public boolean accept(Packet packet) { |
| for (int i=0; i<size; i++) { |
| if (filters[i].accept(packet)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public String toString() { |
| return filters.toString(); |
| } |
| } |