001    /**
002     *
003     * Copyright 2003-2004 The Apache Software Foundation
004     *
005     *  Licensed under the Apache License, Version 2.0 (the "License");
006     *  you may not use this file except in compliance with the License.
007     *  You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     *  Unless required by applicable law or agreed to in writing, software
012     *  distributed under the License is distributed on an "AS IS" BASIS,
013     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     *  See the License for the specific language governing permissions and
015     *  limitations under the License.
016     */
017    
018    package javax.mail.search;
019    
020    import javax.mail.Message;
021    
022    /**
023     * Term that implements a logical negation.
024     *
025     * @version $Rev: 126550 $ $Date: 2005-01-26 14:27:45 -0800 (Wed, 26 Jan 2005) $
026     */
027    public final class NotTerm extends SearchTerm {
028        protected SearchTerm term;
029    
030        public NotTerm(SearchTerm term) {
031            this.term = term;
032        }
033    
034        public SearchTerm getTerm() {
035            return term;
036        }
037    
038        public boolean match(Message message) {
039            return !term.match(message);
040        }
041    
042        public boolean equals(Object other) {
043            if (other == this) return true;
044            if (other instanceof NotTerm == false) return false;
045            return term.equals(((NotTerm) other).term);
046        }
047    
048        public int hashCode() {
049            return term.hashCode();
050        }
051    }