001    /*
002     * Copyright 2010 the original author or authors.
003     * 
004     *  Licensed under the Apache License, Version 2.0 (the "License");
005     *  you may not use this file except in compliance with the License.
006     *  You may obtain a copy of the License at
007     *
008     *      http://www.apache.org/licenses/LICENSE-2.0
009     *
010     *  Unless required by applicable law or agreed to in writing, software
011     *  distributed under the License is distributed on an "AS IS" BASIS,
012     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     *  See the License for the specific language governing permissions and
014     *  limitations under the License.
015     */
016    package com.hs.mail.imap.message.search;
017    
018    /**
019     * This class models the comparison operator. This is an abstract class;
020     * subclasses define different comparison for its datatypes.
021     * 
022     * @author Won Chul Doh
023     * @since Jan 30, 2010
024     * 
025     */
026    public abstract class ComparisonKey extends SearchKey {
027    
028        public static final int LE = 1;
029        public static final int LT = 2;
030        public static final int EQ = 3;
031        public static final int NE = 4;
032        public static final int GT = 5;
033        public static final int GE = 6;
034    
035        protected int comparison;
036    
037            protected ComparisonKey(int comparison) {
038                    this.comparison = comparison;
039            }
040    
041            public int getComparison() {
042                    return comparison;
043            }
044    
045            public boolean equals(Object obj) {
046                    if (!(obj instanceof ComparisonKey))
047                            return false;
048                    ComparisonKey ck = (ComparisonKey) obj;
049                    return ck.comparison == this.comparison;
050            }
051    
052            public int hashCode() {
053                    return comparison;
054            }
055    
056    }