001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 * 019 */ 020package org.apache.directory.api.util; 021 022 023import java.text.ParseException; 024import java.util.Date; 025 026import org.apache.directory.api.i18n.I18n; 027 028 029/** 030 * Gets the generalized time using the "Z" form of the g-time-zone. 031 * 032 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 033 */ 034public final class DateUtils 035{ 036 /** 037 * Private constructor. 038 */ 039 private DateUtils() 040 { 041 } 042 043 044 /** 045 * Return a Date instance from a String 046 * 047 * @param zuluTime The String to convert 048 * @return The Date instance 049 */ 050 public static Date getDate( String zuluTime ) 051 { 052 try 053 { 054 return GeneralizedTime.getDate( zuluTime ); 055 } 056 catch ( Exception e ) 057 { 058 throw new RuntimeException( e ); 059 } 060 } 061 062 063 /** 064 * Gets the generalized time right now. {@link GeneralizedTime} 065 * 066 * @return the generalizedTime right now 067 */ 068 public static String getGeneralizedTime() 069 { 070 return new GeneralizedTime( new Date() ).toGeneralizedTime(); 071 } 072 073 074 /** 075 * 076 * @see #getGeneralizedTime() 077 * 078 * @param date the date to be converted to generalized time string 079 * @return given date in the generalized time string format 080 */ 081 public static String getGeneralizedTime( Date date ) 082 { 083 return new GeneralizedTime( date ).toGeneralizedTime(); 084 } 085 086 087 /** 088 * 089 * @see #getGeneralizedTime() 090 * 091 * @param time the time value to be converted to generalized time string 092 * @return given time in generalized time string format 093 */ 094 public static String getGeneralizedTime( long time ) 095 { 096 return getGeneralizedTime( new Date( time ) ); 097 } 098 099 100 /** 101 * Converts the 18-digit Active Directory timestamps, also named 'Windows NT time format' or 'Win32 FILETIME or SYSTEMTIME'. 102 * These are used in Microsoft Active Directory for pwdLastSet, accountExpires, LastLogon, LastLogonTimestamp and LastPwdSet. 103 * The timestamp is the number of 100-nanoseconds intervals (1 nanosecond = one billionth of a second) since Jan 1, 1601 UTC. 104 * <p> 105 * 106 * @param intervalDate 18-digit number. Time in 100-nanoseconds intervals since 1.1.1601 107 * @return The converted date 108 * @throws ParseException If the given interval is not valid 109 */ 110 public static Date convertIntervalDate( String intervalDate ) throws ParseException 111 { 112 if ( intervalDate == null ) 113 { 114 throw new ParseException( I18n.err( I18n.ERR_04359 ), 0 ); 115 } 116 117 long offset = 11644473600000L; // offset milliseconds from Jan 1, 1601 to Jan 1, 1970 118 119 // convert 100-nanosecond intervals to milliseconds (10000 = 1 000 000ns / 100) 120 long javaTime = Long.parseLong( intervalDate ) / 10000L - offset; 121 122 return new Date( javaTime ); 123 } 124}