001    /*
002     * Copyright 2011 The Kuali Foundation.
003     * 
004     * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
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 org.kuali.kfs.sys.businessobject;
017    
018    import java.util.Comparator;
019    
020    import org.kuali.rice.kns.util.ObjectUtils;
021    
022    /**
023     * The standard comparator for AccountingLine objects
024     */
025    public class AccountingLineComparator implements Comparator<AccountingLine> {
026        
027        /**
028         * Compares two accounting lines based on their sequence number
029         * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
030         */
031        public int compare(AccountingLine rosencrantz, AccountingLine guildenstern) {
032            if (ObjectUtils.isNotNull(rosencrantz) && ObjectUtils.isNotNull(guildenstern))
033                if (ObjectUtils.isNotNull(rosencrantz.getSequenceNumber()) && ObjectUtils.isNotNull(guildenstern.getSequenceNumber()))
034                    return rosencrantz.getSequenceNumber().compareTo(guildenstern.getSequenceNumber());
035            return 0;
036        }
037        
038    }