48 lines
1.3 KiB
Java
48 lines
1.3 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 org.jivesoftware.smack.packet.Packet;
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/**
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* Implements the logical NOT operation on a packet filter. In other words, packets
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* pass this filter if they do not pass the supplied filter.
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*
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* @author Matt Tucker
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*/
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public class NotFilter implements PacketFilter {
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private PacketFilter filter;
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/**
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* Creates a NOT filter using the specified filter.
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*
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* @param filter the filter.
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*/
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public NotFilter(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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this.filter = filter;
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}
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public boolean accept(Packet packet) {
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return !filter.accept(packet);
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}
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}
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