Java Timestamp Compare compareTimestamps(Timestamp timestamp1, Timestamp timestamp2)

Description

Utility method to compare timestamps that avoid NPEs when one of the timestamps is null

License

Educational Community License

Parameter

Parameter	Description
ts1	java.sql.Timestamp
ts2	java.sql.Timestamp

Return

If both timestamps are not null, it returns the normal compare result, otherwise it returns 1 if the first one is not null, or -1 if the second one is not null and 0 if they are both null.

Declaration

public static final int compareTimestamps(Timestamp timestamp1, Timestamp timestamp2)

Method Source Code


//package com.java2s;
/*//from w w  w  . ja v a  2  s  .  c o  m
 * Copyright 2005-2014 The Kuali Foundation
 * 
 * Licensed under the Educational Community 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.opensource.org/licenses/ecl1.php
 * 
 * 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.
 */

import java.sql.Timestamp;

public class Main {
    /**
     * Utility method to compare timestamps that avoid NPEs when one of the timestamps is null
     * 
     * @param ts1 java.sql.Timestamp
     * @param ts2 java.sql.Timestamp
     * @return If both timestamps are not null, it returns the normal compare result, otherwise 
     * it returns 1 if the first one is not null, or -1 if the second one is not null and 0 if they are both null.
     */
    public static final int compareTimestamps(Timestamp timestamp1, Timestamp timestamp2) {
        if (timestamp1 != null) {
            if (timestamp2 != null) {
                return timestamp1.compareTo(timestamp2);
            } else {
                return 1;
            }
        } else {
            if (timestamp2 != null) {
                return -1;
            }
        }
        return 0; //both timestamps are null
    }
}