mirror of
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e57e224734
N.B. Removed reference from 1.6.1 in CHANGES as this looks like it was accidentally added in revision 4958) git-svn-id: http://scm.dspace.org/svn/repo/dspace/branches/dspace-1_6_x@5245 9c30dcfa-912a-0410-8fc2-9e0234be79fd
702 lines
21 KiB
Java
702 lines
21 KiB
Java
/*
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* DCDate.java
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*
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* Version: $Revision$
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*
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* Date: $Date$
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*
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* Copyright (c) 2002-2009, The DSpace Foundation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of the Hewlett-Packard Company nor the name of the
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* Massachusetts Institute of Technology nor the names of their
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*/
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package org.dspace.content;
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import java.text.DateFormatSymbols;
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import java.text.DateFormat;
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import java.text.SimpleDateFormat;
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import java.text.ParseException;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.GregorianCalendar;
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import java.util.Locale;
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import java.util.TimeZone;
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import org.apache.log4j.Logger;
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import org.dspace.core.I18nUtil;
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// FIXME: Not very robust - assumes dates will always be valid
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/**
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* Dublin Core date utility class
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* <P>
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* Dates in the DSpace database are held in the ISO 8601 format. They are always
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* stored in UTC, converting to and from the current time zone.
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* <P>
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* <code>YYYY-MM-DDThh:mm:ss</code>
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* <P>
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* There are four levels of granularity, depending on how much date information
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* is available: year, month, day, time.
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* <P>
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* Examples: <code>1994-05-03T15:30:24</code>,<code>1995-10-04</code>,
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* <code>2001-10</code>,<code>1975</code>
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*
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* The main() method is a simple test program: run it with an optional
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* first argument that is a date string to decode, and it prints the
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* results of all the accessor methods.
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*
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* @author Robert Tansley
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* @author Larry Stone
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* @version $Revision$
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*/
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public class DCDate
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{
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/** Logger */
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private static Logger log = Logger.getLogger(DCDate.class);
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// UTC timezone
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private static final TimeZone utcZone = TimeZone.getTimeZone("UTC");
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// local timezone
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private static final TimeZone localZone = new GregorianCalendar().getTimeZone();
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// Full ISO 8601 is e.g. "2009-07-16T13:59:21Z"
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private static final SimpleDateFormat fullIso = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
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static { fullIso.setTimeZone(utcZone); }
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// without Z
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private static final SimpleDateFormat fullIso2 = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
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static { fullIso2.setTimeZone(utcZone); }
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// without seconds
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private static final SimpleDateFormat fullIso3 = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm");
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static { fullIso3.setTimeZone(utcZone); }
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// Date-only ISO 8601 is e.g. "2009-07-16"
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private static final SimpleDateFormat dateIso = new SimpleDateFormat("yyyy-MM-dd");
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static { dateIso.setTimeZone(utcZone); }
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// Year-Month-only ISO 8601 is e.g. "2009-07"
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private static final SimpleDateFormat yearMonthIso = new SimpleDateFormat("yyyy-MM");
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static { yearMonthIso.setTimeZone(utcZone); }
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// just year, "2009"
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private static final SimpleDateFormat yearIso = new SimpleDateFormat("yyyy");
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static { yearIso.setTimeZone(utcZone); }
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// components of time in UTC
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private GregorianCalendar calendar = null;
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// components of time in local zone, if needed
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private GregorianCalendar localCalendar = null;
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private enum DateGran { YEAR, MONTH, DAY, TIME };
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DateGran granularity = null;
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/**
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* DateFormatSymbols for locale monthsname
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*/
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private static DateFormatSymbols dfs = null;
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/**
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* note the session locale
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*/
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private static Locale langMonth = null;
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/**
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* Construct a clean date
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*/
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public DCDate()
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{
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super();
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}
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/**
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* Construct a date object from a Java <code>Date</code> object.
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*
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* @param date
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* the Java <code>Date</code> object.
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*/
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public DCDate(Date date)
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{
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super();
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setTime(date);
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if (!(calendar.get(Calendar.HOUR_OF_DAY) == 0 &&
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calendar.get(Calendar.MINUTE) == 0 &&
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calendar.get(Calendar.SECOND) == 0))
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granularity = DateGran.TIME;
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// if date is 1-jan, assume it's because this was set for year
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else if (calendar.get(Calendar.DAY_OF_MONTH) == 1 && calendar.get(Calendar.MONTH) == 0)
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granularity = DateGran.YEAR;
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// otherwise day
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else
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granularity = DateGran.DAY;
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}
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/**
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* Construct a date from a Dublin Core value
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*
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* @param fromDC
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* the date string, in ISO 8601 (no timezone, always use UTC/GMT)
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*/
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public DCDate(String fromDC)
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{
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super();
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// An empty date is OK
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if ((fromDC == null) || fromDC.equals(""))
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{
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return;
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}
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// default granularity
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granularity = DateGran.TIME;
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Date date = tryParse(fullIso, fromDC);
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if (date == null)
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date = tryParse(fullIso2, fromDC);
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if (date == null)
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date = tryParse(fullIso3, fromDC);
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if (date == null)
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{
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// NOTE: move GMT date to local midnight when granularity is coarse
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date = tryParse(dateIso, fromDC);
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if (date != null)
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{
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long ldate = date.getTime();
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date = new Date(ldate - localZone.getOffset(ldate));
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granularity = DateGran.DAY;
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}
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}
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if (date == null)
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{
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// NOTE: move GMT date to local midnight when granularity is coarse
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date = tryParse(yearMonthIso, fromDC);
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if (date != null)
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{
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long ldate = date.getTime();
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date = new Date(ldate - localZone.getOffset(ldate));
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granularity = DateGran.MONTH;
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}
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}
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if (date == null)
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{
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// NOTE: move GMT date to local midnight when granularity is coarse
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date = tryParse(yearIso, fromDC);
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if (date != null)
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{
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long ldate = date.getTime();
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date = new Date(ldate - localZone.getOffset(ldate));
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granularity = DateGran.YEAR;
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}
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}
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if (date == null)
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log.warn("Mangled date: " + fromDC + " ..failed all attempts to parse as date.");
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else
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setTime(date);
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}
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// Attempt to parse, swallowing errors; return null for failure.
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private synchronized Date tryParse(SimpleDateFormat sdf, String source)
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{
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try
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{
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return sdf.parse(source);
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}
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catch (ParseException pe)
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{
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return null;
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}
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}
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/**
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* Set the time components to reflect the absolute time in this Date.
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*
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* @param date
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* the Java <code>Date</code> object.
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*/
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private void setTime(Date date)
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{
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calendar = new GregorianCalendar(utcZone);
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calendar.setTime(date);
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}
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/**
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* Get a date representing the current instant in time.
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*
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* @return a DSpaceDate object representing the current instant.
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*/
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public static DCDate getCurrent()
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{
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return (new DCDate(new Date()));
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}
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/**
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* Get the date as a string to put back in the Dublin Core
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*
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* @return The date as a string.
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*/
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public String toString()
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{
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if (calendar == null)
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return "null";
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return toStringInternal();
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}
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// When granularity is "day" or more, show the _local-time_ day because
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// when the granularity was coarse the local time value was set.
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private synchronized String toStringInternal()
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{
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if (granularity == DateGran.YEAR)
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return String.format("%4d", getYear());
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else if (granularity == DateGran.MONTH)
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return String.format("%4d-%02d", getYear(), getMonth());
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else if (granularity == DateGran.DAY)
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return String.format("%4d-%02d-%02d", getYear(), getMonth(), getDay());
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else
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return fullIso.format(calendar.getTime());
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}
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/**
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* Get the date as a Java Date object
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*
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* @return a Date object
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*/
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public Date toDate()
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{
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if (calendar == null)
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return null;
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else
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return calendar.getTime();
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}
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/**
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* Set the date. The date passed in is assumed to be in the current time
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* zone, and is adjusting to fit the current time zone. Unknown values
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* should be given as -1.
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*
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* @param yyyy
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* the year
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* @param mm
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* the month
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* @param dd
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* the day
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* @param hh
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* the hours
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* @param mn
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* the minutes
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* @param ss
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* the seconds
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*/
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public void setDateLocal(int yyyy, int mm, int dd, int hh, int mn, int ss)
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{
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// default values
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int lyear = 0;
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int lhours = 0;
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int lminutes = 0;
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int lseconds = 0;
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int lmonth = 1;
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int lday = 1;
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if (yyyy > 0)
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{
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lyear = yyyy;
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granularity = DateGran.YEAR;
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}
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if (mm > 0)
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{
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lmonth = mm;
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granularity = DateGran.MONTH;
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}
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if (dd > 0)
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{
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lday = dd;
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granularity = DateGran.DAY;
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}
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if (hh >= 0)
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{
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lhours = hh;
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granularity = DateGran.TIME;
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}
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if (mn >= 0)
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{
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lminutes = mn;
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granularity = DateGran.TIME;
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}
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if (ss >= 0)
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{
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lseconds = ss;
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granularity = DateGran.TIME;
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}
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// do the timezone adjustment: get Date and put it in UTC zone.
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GregorianCalendar localGC = new GregorianCalendar(lyear, lmonth - 1, lday,
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lhours, lminutes, lseconds);
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setTime(localGC.getTime());
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}
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// get cached calendar in local timezone
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private GregorianCalendar getLocalCalendar()
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{
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if (localCalendar == null)
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{
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if (calendar == null)
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return null;
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localCalendar = new GregorianCalendar();
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localCalendar.setTime(calendar.getTime());
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}
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return localCalendar;
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}
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/**
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* Get the year, adjusting for current time zone.
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*
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* @return the year
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*/
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public int getYear()
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{
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return ((getLocalCalendar() == null) || (!withinGranularity(DateGran.YEAR))) ? -1 : localCalendar.get(Calendar.YEAR);
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}
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/**
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* Get the month, adjusting for current time zone.
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*
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* @return the month
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*/
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public int getMonth()
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{
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return ((getLocalCalendar() == null) || (!withinGranularity(DateGran.MONTH))) ? -1 : localCalendar.get(Calendar.MONTH) + 1;
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}
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/**
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* Get the day, adjusting for current time zone.
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*
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* @return the day
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*/
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public int getDay()
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{
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return ((getLocalCalendar() == null) || (!withinGranularity(DateGran.DAY))) ? -1 : localCalendar.get(Calendar.DAY_OF_MONTH);
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}
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/**
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* Get the hour, adjusting for current time zone.
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*
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* @return the hour
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*/
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public int getHour()
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{
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return getLocalCalendar() == null ? -1 : localCalendar.get(Calendar.HOUR_OF_DAY);
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}
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/**
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* Get the minute, adjusting for current time zone.
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*
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* @return the minute
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*/
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public int getMinute()
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{
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return getLocalCalendar() == null ? -1 : localCalendar.get(Calendar.MINUTE);
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}
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/**
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* Get the second, adjusting for current time zone.
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*
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* @return the second
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*/
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public int getSecond()
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{
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return getLocalCalendar() == null ? -1 : localCalendar.get(Calendar.SECOND);
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}
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/**
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* Get the year in GMT.
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*
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* @return the year
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*/
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public int getYearGMT()
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{
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return calendar == null ? -1 : calendar.get(Calendar.YEAR);
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}
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/**
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* Get the month in GMT.
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*
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* @return the month
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*/
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public int getMonthGMT()
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{
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return calendar == null ? -1 : calendar.get(Calendar.MONTH) + 1;
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}
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/**
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* Get the day in GMT.
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*
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* @return the day
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*/
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public int getDayGMT()
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{
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return calendar == null ? -1 : calendar.get(Calendar.DAY_OF_MONTH);
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}
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/**
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* Get the hour in GMT.
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*
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* @return the hour
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*/
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public int getHourGMT()
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{
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return calendar == null ? -1 : calendar.get(Calendar.HOUR_OF_DAY);
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}
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/**
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* Get the minute in GMT.
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*
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* @return the minute
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*/
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public int getMinuteGMT()
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{
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return calendar == null ? -1 : calendar.get(Calendar.MINUTE);
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}
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/**
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* Get the second in GMT.
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*
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* @return the second
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*/
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public int getSecondGMT()
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{
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return calendar == null ? -1 : calendar.get(Calendar.SECOND);
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}
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/**
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* Get a month's name for a month between 1 and 12. Any invalid month value
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* (e.g. 0 or -1) will return a value of "Unspecified".
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*
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* @param m
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* the month number
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*
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* @return the month name.
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*/
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public static String getMonthName(int m, Locale locale)
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{
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if ((m > 0) && (m < 13))
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{
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if (dfs == null || !langMonth.equals(locale))
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{
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dfs = new DateFormatSymbols(locale);
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langMonth = locale;
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}
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return dfs.getMonths()[m-1];
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}
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else
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{
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return "Unspecified";
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}
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}
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/**
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* Test if the requested level of granularity is within that of the date.
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*
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* @param dg
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* The requested level of granularity.
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* @return
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* true or false.
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*
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*/
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private boolean withinGranularity(DateGran dg)
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{
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if (granularity == DateGran.TIME)
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{
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if ((dg == DateGran.TIME) || (dg == DateGran.DAY) || (dg == DateGran.MONTH) || (dg == DateGran.YEAR))
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{
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return true;
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}
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}
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if (granularity == DateGran.DAY)
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{
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if ((dg == DateGran.DAY) || (dg == DateGran.MONTH) || (dg == DateGran.YEAR))
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{
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return true;
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}
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}
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if (granularity == DateGran.MONTH)
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{
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if ((dg == DateGran.MONTH) || (dg == DateGran.YEAR))
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{
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return true;
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}
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}
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if (granularity == DateGran.YEAR)
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{
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if (dg == DateGran.YEAR)
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{
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return true;
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}
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}
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return false;
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}
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/**
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* Simple test program
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* Usage: java org.dspace.content.DCdate [DCDate | -l yyyy [mm [dd ..]]] ]
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* where "DCDate" is the kind of value that would be in metadata,
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* e.g. "2006", "2006-02-03", etc.
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* (-l form tests local time parsing)
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* Default is to use current time.
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*/
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public static void main(String args[])
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throws Exception
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{
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DCDate d;
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|
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// if there's an arg, parse it for the date, otherwise use now
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if (args.length > 0)
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{
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if (args[0].equals("-l"))
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{
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int val[] = { -1, -1, -1, -1, -1, -1 };
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for (int i = 1; i < 7 && i < args.length; ++i)
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val[i-1] = Integer.parseInt(args[i]);
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d = new DCDate();
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d.setDateLocal(val[0], val[1], val[2], val[3], val[4], val[5]);
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}
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|
else
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d = new DCDate(args[0]);
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}
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else
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d = DCDate.getCurrent();
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|
|
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// display results:
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System.out.println("toString() = \""+d.toString()+"\"");
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System.out.println("toDate().toString() = \""+d.toDate().toString()+"\"");
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System.out.println("\ndisplayDate(time=F,loc=F) = \""+d.displayDate(false, false, I18nUtil.DEFAULTLOCALE)+"\"");
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System.out.println("displayDate(time=T,loc=F) = \""+d.displayDate(true, false, I18nUtil.DEFAULTLOCALE)+"\"");
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System.out.println("displayDate(time=F,loc=T) = \""+d.displayDate(false, true, I18nUtil.DEFAULTLOCALE)+"\"");
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|
System.out.println("displayDate(time=T,loc=T) = \""+d.displayDate(true, true, I18nUtil.DEFAULTLOCALE)+"\"");
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|
|
|
System.out.println("By component:");
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|
System.out.println("granularity = "+d.granularity);
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|
System.out.println("getYear(), = "+d.getYear());
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|
System.out.println("getMonth(), = "+d.getMonth());
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|
System.out.println("getDay(), = "+d.getDay());
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|
System.out.println("getHour(), = "+d.getHour());
|
|
System.out.println("getMinute(), = "+d.getMinute());
|
|
System.out.println("getSecond()); = "+d.getSecond());
|
|
System.out.println("By GMT component:");
|
|
System.out.println("getYearGMT(), = "+d.getYearGMT());
|
|
System.out.println("getMonthGMT(), = "+d.getMonthGMT());
|
|
System.out.println("getDayGMT(), = "+d.getDayGMT());
|
|
System.out.println("getHourGMT(), = "+d.getHourGMT());
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|
System.out.println("getMinuteGMT(), = "+d.getMinuteGMT());
|
|
System.out.println("getSecondGMT()); = "+d.getSecondGMT());
|
|
|
|
// convert it the hard way:
|
|
DCDate hw = new DCDate();
|
|
hw.setDateLocal(d.getYear(),d.getMonth(),d.getDay(),
|
|
d.getHour(),d.getMinute(),d.getSecond());
|
|
System.out.println("hardway.toString() = \""+hw.toString()+"\"");
|
|
|
|
// month str
|
|
System.out.println("Month Name = \""+DCDate.getMonthName(d.getMonth(), Locale.getDefault())+"\"");
|
|
}
|
|
|
|
/**
|
|
* Format a human-readable version of the DCDate, with optional time.
|
|
* This needs to be in DCDate because it depends on the granularity of
|
|
* the original time.
|
|
*
|
|
* FIXME: This should probably be replaced with a localized DateFormat.
|
|
*
|
|
* @param showTime
|
|
* if true, display the time with the date
|
|
* @param isLocalTime
|
|
* if true, adjust for local time zone, otherwise GMT
|
|
* @param locale
|
|
* locale of the user
|
|
*
|
|
* @return String with the date in a human-readable form.
|
|
*/
|
|
public String displayDate(boolean showTime, boolean isLocalTime, Locale locale)
|
|
{
|
|
// if we are only showing day of a DCDate with time granularity,
|
|
// create a temporary DCDate with date granularity so getDay() etc work.
|
|
DCDate dd = this;
|
|
if (!showTime && granularity == DateGran.TIME)
|
|
{
|
|
dd = new DCDate();
|
|
dd.setDateLocal(getYearGMT(), getMonthGMT(), getDayGMT(), -1, -1, -1);
|
|
}
|
|
|
|
// forcibly truncate month name to 3 chars -- XXX FIXME?
|
|
String monthName = DCDate.getMonthName(dd.getMonth(), locale);
|
|
if (monthName.length() > 2)
|
|
monthName = monthName.substring(0, 3);
|
|
|
|
// display date and time
|
|
if (showTime && granularity == DateGran.TIME)
|
|
{
|
|
if (isLocalTime)
|
|
{
|
|
return String.format("%d-%s-%4d %02d:%02d:%02d",
|
|
dd.getDay(), monthName, dd.getYear(),
|
|
dd.getHour(), dd.getMinute(), dd.getSecond());
|
|
}
|
|
else
|
|
{
|
|
monthName = DCDate.getMonthName(dd.getMonthGMT(), locale);
|
|
if (monthName.length() > 2)
|
|
monthName = monthName.substring(0, 3);
|
|
return String.format("%d-%s-%4d %02d:%02d:%02d",
|
|
dd.getDayGMT(), monthName, dd.getYearGMT(),
|
|
dd.getHourGMT(), dd.getMinuteGMT(), dd.getSecondGMT());
|
|
}
|
|
}
|
|
else if (granularity == DateGran.YEAR)
|
|
{
|
|
return String.format("%4d", dd.getYear());
|
|
}
|
|
else if (granularity == DateGran.MONTH)
|
|
{
|
|
return String.format("%s-%4d", monthName, dd.getYear());
|
|
}
|
|
else
|
|
{
|
|
return String.format("%d-%s-%4d", dd.getDay(), monthName, dd.getYear());
|
|
}
|
|
}
|
|
}
|