001 /* 002 * CDDL HEADER START 003 * 004 * The contents of this file are subject to the terms of the 005 * Common Development and Distribution License, Version 1.0 only 006 * (the "License"). You may not use this file except in compliance 007 * with the License. 008 * 009 * You can obtain a copy of the license at 010 * trunk/opends/resource/legal-notices/OpenDS.LICENSE 011 * or https://OpenDS.dev.java.net/OpenDS.LICENSE. 012 * See the License for the specific language governing permissions 013 * and limitations under the License. 014 * 015 * When distributing Covered Code, include this CDDL HEADER in each 016 * file and include the License file at 017 * trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable, 018 * add the following below this CDDL HEADER, with the fields enclosed 019 * by brackets "[]" replaced with your own identifying information: 020 * Portions Copyright [yyyy] [name of copyright owner] 021 * 022 * CDDL HEADER END 023 * 024 * 025 * Copyright 2006-2008 Sun Microsystems, Inc. 026 */ 027 package org.opends.server.loggers; 028 029 import java.io.File; 030 import java.util.Comparator; 031 032 033 034 035 /** 036 * This class implements a comparator that can compare two files based on the 037 * time that they were last modified. 038 */ 039 public class FileComparator implements Comparator<File> 040 { 041 /** 042 * Compare two files based on file modification time. 043 * 044 * @param o1 The first file to be compared. 045 * @param o2 The second file to be compared. 046 * 047 * @return A negative value if the first file was the most recently modified, 048 * a positive value if the second was the most recently modified, or 049 * zero if there is no discernible difference between the last modify 050 * times. 051 */ 052 public int compare(File o1, File o2) 053 { 054 if(o1 == o2) 055 { 056 return 0; 057 } 058 059 if (o1.lastModified() > o2.lastModified()) 060 { 061 return -1; 062 } else if (o1.lastModified() < o2.lastModified()) 063 { 064 return 1; 065 } else 066 { 067 return 0; 068 } 069 } 070 071 } 072