diff --git a/src/scratchpad/src/org/apache/poi/hslf/util/SystemTimeUtils.java b/src/scratchpad/src/org/apache/poi/hslf/util/SystemTimeUtils.java new file mode 100644 index 000000000..f00630d33 --- /dev/null +++ b/src/scratchpad/src/org/apache/poi/hslf/util/SystemTimeUtils.java @@ -0,0 +1,88 @@ +/* ==================================================================== + Copyright 2002-2004 Apache Software Foundation + + Licensed under the Apache 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.apache.org/licenses/LICENSE-2.0 + + 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. +==================================================================== */ + +package org.apache.poi.hslf.util; + +import java.util.Calendar; +import java.util.Date; +import java.util.GregorianCalendar; + +import org.apache.poi.util.LittleEndian; + +/** + * A helper class for dealing with SystemTime Structs, as defined at + * http://msdn.microsoft.com/library/en-us/sysinfo/base/systemtime_str.asp . + * + * Discrepancies between Calendar and SYSTEMTIME: + * - that January = 1 in SYSTEMTIME, 0 in Calendar. + * - that the day of the week (0) starts on Sunday in SYSTEMTIME, and Monday in Calendar + * It is also the case that this does not store the timezone, and no... it is not + * stored as UTC either, but rather the local system time (yuck.) + * + * @author Daniel Noll + * @author Nick Burch + */ +public class SystemTimeUtils { + /** + * Get the date found in the byte array, as a java Data object + */ + public static Date getDate(byte[] data) { + return getDate(data,0); + } + /** + * Get the date found in the byte array, as a java Data object + */ + public static Date getDate(byte[] data, int offset) { + Calendar cal = new GregorianCalendar(); + + cal.set(Calendar.YEAR, LittleEndian.getShort(data,offset)); + cal.set(Calendar.MONTH, LittleEndian.getShort(data,offset+2)-1); + // Not actually needed 0 - can be found from day of month + //cal.set(Calendar.DAY_OF_WEEK, LittleEndian.getShort(data,offset+4)+1); + cal.set(Calendar.DAY_OF_MONTH, LittleEndian.getShort(data,offset+6)); + cal.set(Calendar.HOUR, LittleEndian.getShort(data,offset+8)); + cal.set(Calendar.MINUTE, LittleEndian.getShort(data,offset+10)); + cal.set(Calendar.SECOND, LittleEndian.getShort(data,offset+12)); + cal.set(Calendar.MILLISECOND, LittleEndian.getShort(data,offset+14)); + + return cal.getTime(); + } + + /** + * Convert the supplied java Date into a SystemTime struct, and write it + * into the supplied byte array. + */ + public static void storeDate(Date date, byte[] dest) { + storeDate(date, dest, 0); + } + /** + * Convert the supplied java Date into a SystemTime struct, and write it + * into the supplied byte array. + */ + public static void storeDate(Date date, byte[] dest, int offset) { + Calendar cal = new GregorianCalendar(); + cal.setTime(date); + + LittleEndian.putShort(dest, offset + 0, (short) cal.get(Calendar.YEAR)); + LittleEndian.putShort(dest, offset + 2, (short)(cal.get(Calendar.MONTH) + 1)); + LittleEndian.putShort(dest, offset + 4, (short)(cal.get(Calendar.DAY_OF_WEEK)-1)); + LittleEndian.putShort(dest, offset + 6, (short) cal.get(Calendar.DAY_OF_MONTH)); + LittleEndian.putShort(dest, offset + 8, (short) cal.get(Calendar.HOUR)); + LittleEndian.putShort(dest, offset + 10,(short) cal.get(Calendar.MINUTE)); + LittleEndian.putShort(dest, offset + 12,(short) cal.get(Calendar.SECOND)); + LittleEndian.putShort(dest, offset + 14,(short) cal.get(Calendar.MILLISECOND)); + } +}