/*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is the Kowari Metadata Store.
*
* The Initial Developer of the Original Code is Plugged In Software Pty
* Ltd (http://www.pisoftware.com, mailto:info@pisoftware.com). Portions
* created by Plugged In Software Pty Ltd are Copyright (C) 2001,2002
* Plugged In Software Pty Ltd. All Rights Reserved.
*
* Contributor(s): N/A.
*
* [NOTE: The text of this Exhibit A may differ slightly from the text
* of the notices in the Source Code files of the Original Code. You
* should use the text of this Exhibit A rather than the text found in the
* Original Code Source Code for Your Modifications.]
*
*/
package org.mulgara.store.stringpool.xa;
// Java 2 standard packages
import java.net.URI;
import java.nio.ByteBuffer;
import java.util.Date;
// Third party packages
import org.apache.log4j.Logger;
// Locally written packages
import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.DateTimeFormatterBuilder;
import org.joda.time.format.ISODateTimeFormat;
import org.mulgara.query.rdf.XSD;
import org.mulgara.store.stringpool.*;
import org.mulgara.util.Constants;
/**
* An SPObject that represents dates.
*
* @created 2002-03-07
*
* @author David Makepeace
*
* @version $Revision: 1.1 $
*
* @modified $Date: 2005/03/11 04:15:22 $
*
* @maintenanceAuthor $Author: raboczi $
*
* @company <A href="mailto:info@PIsoftware.com">Plugged In Software</A>
*
* @copyright © 2004 <A href="http://www.PIsoftware.com/">Plugged In
* Software Pty Ltd</A>
*
* @licence <a href="{@docRoot}/../../LICENCE">Mozilla Public License v1.1</a>
*/
public final class SPDateImpl extends AbstractSPTypedLiteral {
@SuppressWarnings("unused")
private final static Logger logger = Logger.getLogger(SPDateImpl.class);
static final int TYPE_ID = 5; // Unique ID
static final URI TYPE_URI = XSD.DATE_URI;
static final int MAX_LEN_NO_TIMEZONE = "-YYYY-MM-dd".length();
static final int TIMEZONE_LEN = "+00:00".length();
static final int MILLIS_IN_MINUTE = 60000;
static final DateTimeFormatter utcParser;
static final DateTimeFormatter tzParser;
static final DateTimeFormatter outputFormat;
private Date date;
private int timezoneOffset = 0;
static {
DateTimeFormatterBuilder b = new DateTimeFormatterBuilder();
b.appendYear(4, 4).appendLiteral('-').appendMonthOfYear(2).appendLiteral('-').appendDayOfMonth(2);
b.appendOptional(new DateTimeFormatterBuilder().appendTimeZoneOffset("", true, 2, 2).toParser());
utcParser = b.toFormatter().withZone(DateTimeZone.UTC);
b = new DateTimeFormatterBuilder();
tzParser = b.appendTimeZoneOffset("", true, 2, 2).toFormatter().withZone(DateTimeZone.UTC);
b = new DateTimeFormatterBuilder();
b.appendYear(4, 4).appendLiteral('-').appendMonthOfYear(2).appendLiteral('-').appendDayOfMonth(2).appendTimeZoneOffset("+00:00", true, 2, 2);
outputFormat = b.toFormatter();
}
private SPDateImpl(Date date, int timezoneOffset) {
super(TYPE_ID, TYPE_URI);
if (date == null) {
throw new IllegalArgumentException("Null \"date\" parameter");
}
this.date = date;
this.timezoneOffset = timezoneOffset;
}
SPDateImpl(ByteBuffer data) {
this(data.getLong(), (data.limit() > Constants.SIZEOF_LONG) ? data.getInt() : calcTZOffset(data.getLong(0)));
}
/** Guess the timezone offset the given time (date) was stored under */
private static int calcTZOffset(long time) {
int minutes = new DateTime(time, DateTimeZone.UTC).getMinuteOfDay();
return (minutes < 12*60) ? -minutes : (minutes > 12*60) ? 24*60 - minutes :
(DateTimeZone.getDefault().getOffset(time) > 0) ? -minutes : minutes;
}
SPDateImpl(long l) {
this(new Date(l), 0);
}
SPDateImpl(long l, int timezoneMinutes) {
this(new Date(l), timezoneMinutes);
}
SPDateImpl(long l, int timezoneHours, int timezoneMinutes) {
this(new Date(l), timezoneHours * 60 + timezoneMinutes);
}
static SPDateImpl newInstance(String lexicalForm) {
int minuteOffset = 0;
if (lexicalForm.length() > MAX_LEN_NO_TIMEZONE) {
int timezoneStart = lexicalForm.length() - TIMEZONE_LEN;
String timezone = lexicalForm.substring(timezoneStart);
minuteOffset = -(int)(tzParser.parseDateTime(timezone).getMillis() / MILLIS_IN_MINUTE);
} else {
minuteOffset = Integer.MIN_VALUE;
}
Date date = new Date(utcParser.parseDateTime(lexicalForm).getMillis());
return new SPDateImpl(date, minuteOffset);
}
/* from SPObject interface. */
public ByteBuffer getData() {
ByteBuffer data = ByteBuffer.allocate(Constants.SIZEOF_LONG + Constants.SIZEOF_INT);
data.putLong(date.getTime());
data.putInt(timezoneOffset);
data.flip();
return data;
}
public SPComparator getSPComparator() {
return SPDateComparator.getInstance();
}
public String getLexicalForm() {
if (timezoneOffset == Integer.MIN_VALUE) {
// no timezone information
return ISODateTimeFormat.date().withZone(DateTimeZone.UTC).print(date.getTime());
}
DateTimeZone zone = DateTimeZone.forOffsetMillis(timezoneOffset * MILLIS_IN_MINUTE);
return outputFormat.withZone(zone).print(date.getTime());
}
/* from Comparable interface. */
public int compareTo(SPObject o) {
// Compare types.
int c = super.compareTo(o);
if (c != 0) return c;
// Compare the Dates.
return date.compareTo(((SPDateImpl)o).date);
}
/**
* Used for caching, so it cannot compare by value.
* @return The hashcode for this date with timezone.
*/
public int hashCode() {
return date.hashCode() ^ timezoneOffset;
}
/**
* @see java.lang.Object#equals(java.lang.Object)
* Used for caching, so it cannot compare by value.
*/
public boolean equals(Object obj) {
// Check for null.
if (obj == null) return false;
try {
SPDateImpl oDate = (SPDateImpl)obj;
return date.equals(oDate.date) && timezoneOffset == oDate.timezoneOffset;
} catch (ClassCastException ex) {
// obj was not an SPDateImpl.
return false;
}
}
/** Compares the binary representations of two SPDateImpl objects. */
public static class SPDateComparator implements SPComparator {
private static final SPDateComparator INSTANCE = new SPDateComparator();
public static SPDateComparator getInstance() {
return INSTANCE;
}
public int comparePrefix(ByteBuffer d1, ByteBuffer d2, int d2Size) {
return 0;
}
public int compare(ByteBuffer d1, int st1, ByteBuffer d2, int st2) {
int c = AbstractSPObject.compare(d1.getLong(), d2.getLong());
// if the times are the same, then differentiate by timezone
if (c == 0) c = AbstractSPObject.compare(d1.getInt(), d2.getInt());
return c;
}
}
}