| /******************************************************************************* |
| * Copyright (c) 2005, 2010 Andrea Bittau, University College London, and others |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Andrea Bittau - initial API and implementation from the PsychoPath XPath 2.0 |
| * Mukul Gandhi - bug 273760 - wrong namespace for functions and data types |
| * Mukul Gandhi - bug 274792 - improvements to xs:date constructor function. |
| * David Carver - bug 282223 - implementation of xs:duration. |
| * fixed casting issue. |
| * David Carver - bug 280547 - fix dates for comparison |
| * Jesper Steen Moller - bug 262765 - fix type tests |
| * Mukul Gandhi - bug 280798 - PsychoPath support for JDK 1.4 |
| *******************************************************************************/ |
| |
| package org.eclipse.wst.xml.xpath2.processor.internal.types; |
| |
| import java.util.Calendar; |
| import java.util.GregorianCalendar; |
| import java.util.TimeZone; |
| |
| import javax.xml.datatype.Duration; |
| import javax.xml.datatype.XMLGregorianCalendar; |
| |
| import org.eclipse.wst.xml.xpath2.api.DynamicContext; |
| import org.eclipse.wst.xml.xpath2.api.Item; |
| import org.eclipse.wst.xml.xpath2.api.ResultBuffer; |
| import org.eclipse.wst.xml.xpath2.api.ResultSequence; |
| import org.eclipse.wst.xml.xpath2.api.typesystem.TypeDefinition; |
| import org.eclipse.wst.xml.xpath2.processor.DynamicError; |
| import org.eclipse.wst.xml.xpath2.processor.ResultSequenceFactory; |
| import org.eclipse.wst.xml.xpath2.processor.internal.function.CmpEq; |
| import org.eclipse.wst.xml.xpath2.processor.internal.function.CmpGt; |
| import org.eclipse.wst.xml.xpath2.processor.internal.function.CmpLt; |
| import org.eclipse.wst.xml.xpath2.processor.internal.function.MathMinus; |
| import org.eclipse.wst.xml.xpath2.processor.internal.function.MathPlus; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.builtin.BuiltinTypeLibrary; |
| |
| /** |
| * Representation of a date of the form year-month-day and optional timezone |
| */ |
| public class XSDate extends CalendarType implements CmpEq, CmpLt, CmpGt, |
| |
| MathMinus, MathPlus, |
| |
| Cloneable { |
| private static final String XS_DATE = "xs:date"; |
| private Calendar _calendar; |
| private boolean _timezoned; |
| private XSDuration _tz; |
| |
| /** |
| * Initializes a new representation of a supplied date |
| * |
| * @param cal |
| * The Calendar representation of the date to be stored |
| * @param tz |
| * The time zone of the date to be stored. |
| */ |
| public XSDate(Calendar cal, XSDuration tz) { |
| _calendar = cal; |
| |
| _tz = tz; |
| if (tz == null) |
| _timezoned = false; |
| else |
| _timezoned = true; |
| } |
| |
| /** |
| * Initializes a new representation of the current date |
| */ |
| public XSDate() { |
| this(new GregorianCalendar(TimeZone.getTimeZone("GMT")), null); |
| } |
| |
| /** |
| * Retrieves the datatype name |
| * |
| * @return "date" which is the dataype name |
| */ |
| public String type_name() { |
| return "date"; |
| } |
| |
| /** |
| * Creates a copy of this date representation |
| * |
| * @return A copy of this date representation |
| */ |
| public Object clone() throws CloneNotSupportedException { |
| Calendar c = (Calendar) calendar().clone(); |
| XSDuration t = tz(); |
| |
| if (t != null) |
| t = (XSDuration) t.clone(); |
| |
| return new XSDate(c, t); |
| } |
| |
| /** |
| * Parses a String representation of a date (of the form year-month-day or |
| * year-month-day+timezone) and constructs a new XSDate representation of |
| * it. |
| * |
| * @param str |
| * The String representation of the date (and optional timezone) |
| * @return The XSDate representation of the supplied date |
| */ |
| public static XSDate parse_date(String str) { |
| |
| String date = ""; |
| String time = "T00:00:00.0"; |
| |
| int index = str.indexOf('+', 1); |
| if (index == -1) { |
| index = str.indexOf('-', 1); |
| if (index == -1) |
| return null; |
| index = str.indexOf('-', index + 1); |
| if (index == -1) |
| return null; |
| index = str.indexOf('-', index + 1); |
| } |
| if (index == -1) |
| index = str.indexOf('Z', 1); |
| if (index != -1) { |
| date = str.substring(0, index); |
| // here we go |
| date += time; |
| date += str.substring(index, str.length()); |
| } else { |
| date = str + time; |
| } |
| |
| // sorry again =D |
| XSDateTime dt = XSDateTime.parseDateTime(date); |
| if (dt == null) |
| return null; |
| |
| return new XSDate(dt.calendar(), dt.tz()); |
| } |
| |
| /** |
| * Creates a new result sequence consisting of the retrievable date value in |
| * the supplied result sequence |
| * |
| * @param arg |
| * The result sequence from which to extract the date value. |
| * @throws DynamicError |
| * @return A new result sequence consisting of the date value supplied. |
| */ |
| public ResultSequence constructor(ResultSequence arg) throws DynamicError { |
| if (arg.empty()) |
| return ResultBuffer.EMPTY; |
| |
| Item aat = arg.first(); |
| |
| if (!isCastable(aat)) { |
| throw DynamicError.invalidType(); |
| } |
| |
| XSDate dt = castDate(aat); |
| |
| if (dt == null) |
| throw DynamicError.cant_cast(null); |
| |
| return dt; |
| } |
| |
| private boolean isCastable(Item aat) { |
| |
| // We might be able to cast these. |
| if (aat instanceof XSString || aat instanceof XSUntypedAtomic |
| || aat instanceof NodeType) { |
| return true; |
| } |
| |
| if (aat instanceof XSTime) { |
| return false; |
| } |
| |
| if (aat instanceof XSDateTime) { |
| return true; |
| |
| } |
| |
| if (aat instanceof XSDate) { |
| return true; |
| } |
| |
| return false; |
| } |
| |
| private XSDate castDate(Item aat) { |
| if (aat instanceof XSDate) { |
| XSDate date = (XSDate) aat; |
| return new XSDate(date.calendar(), date.tz()); |
| } |
| |
| if (aat instanceof XSDateTime) { |
| XSDateTime dateTime = (XSDateTime) aat; |
| return new XSDate(dateTime.calendar(), dateTime.tz()); |
| } |
| |
| return parse_date(aat.getStringValue()); |
| } |
| |
| /** |
| * Retrieve the year from the date stored |
| * |
| * @return the year value of the date stored |
| */ |
| public int year() { |
| int y = _calendar.get(Calendar.YEAR); |
| if (_calendar.get(Calendar.ERA) == GregorianCalendar.BC) |
| y *= -1; |
| |
| return y; |
| } |
| |
| /** |
| * Retrieve the month from the date stored |
| * |
| * @return the month value of the date stored |
| */ |
| public int month() { |
| return _calendar.get(Calendar.MONTH) + 1; |
| } |
| |
| /** |
| * Retrieve the day from the date stored |
| * |
| * @return the day value of the date stored |
| */ |
| public int day() { |
| return _calendar.get(Calendar.DAY_OF_MONTH); |
| } |
| |
| /** |
| * Retrieves whether this date has an optional timezone associated with it |
| * |
| * @return True if there is a timezone associated with this date. False |
| * otherwise. |
| */ |
| public boolean timezoned() { |
| return _timezoned; |
| } |
| |
| /** |
| * Retrieves a String representation of the date stored |
| * |
| * @return String representation of the date stored |
| */ |
| public String getStringValue() { |
| String ret = ""; |
| |
| Calendar adjustFortimezone = calendar(); |
| |
| if (adjustFortimezone.get(Calendar.ERA) == GregorianCalendar.BC) { |
| ret += "-"; |
| } |
| |
| ret += XSDateTime.pad_int(adjustFortimezone.get(Calendar.YEAR), 4); |
| |
| ret += "-"; |
| ret += XSDateTime.pad_int(month(), 2); |
| |
| ret += "-"; |
| ret += XSDateTime.pad_int(adjustFortimezone.get(Calendar.DAY_OF_MONTH), |
| 2); |
| |
| if (timezoned()) { |
| int hrs = _tz.hours(); |
| int min = _tz.minutes(); |
| double secs = _tz.seconds(); |
| if (hrs == 0 && min == 0 && secs == 0) { |
| ret += "Z"; |
| } else { |
| String tZoneStr = ""; |
| if (_tz.negative()) { |
| tZoneStr += "-"; |
| } else { |
| tZoneStr += "+"; |
| } |
| tZoneStr += XSDateTime.pad_int(hrs, 2); |
| tZoneStr += ":"; |
| tZoneStr += XSDateTime.pad_int(min, 2); |
| |
| ret += tZoneStr; |
| } |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * Retrive the datatype full pathname |
| * |
| * @return "xs:date" which is the datatype full pathname |
| */ |
| public String string_type() { |
| return XS_DATE; |
| } |
| |
| /** |
| * Retrieves the Calendar representation of the date stored |
| * |
| * @return Calendar representation of the date stored |
| */ |
| public Calendar calendar() { |
| return _calendar; |
| } |
| |
| /** |
| * Retrieves the timezone associated with the date stored |
| * |
| * @return the timezone associated with the date stored |
| */ |
| public XSDuration tz() { |
| return _tz; |
| } |
| |
| // comparisons |
| /** |
| * Equality comparison on this and the supplied dates (taking timezones into |
| * account) |
| * |
| * @param arg |
| * XSDate representation of the date to compare to |
| * @throws DynamicError |
| * @return True if the two dates are represent the same exact point in time. |
| * False otherwise. |
| */ |
| public boolean eq(AnyType arg, DynamicContext dynamicContext) throws DynamicError { |
| XSDate val = (XSDate) NumericType.get_single_type((Item)arg, XSDate.class); |
| Calendar thiscal = normalizeCalendar(calendar(), tz()); |
| Calendar thatcal = normalizeCalendar(val.calendar(), val.tz()); |
| |
| return thiscal.equals(thatcal); |
| } |
| |
| /** |
| * Comparison on this and the supplied dates (taking timezones into account) |
| * |
| * @param arg |
| * XSDate representation of the date to compare to |
| * @throws DynamicError |
| * @return True if in time, this date lies before the date supplied. False |
| * otherwise. |
| */ |
| public boolean lt(AnyType arg, DynamicContext context) throws DynamicError { |
| XSDate val = (XSDate) NumericType.get_single_type((Item)arg, XSDate.class); |
| Calendar thiscal = normalizeCalendar(calendar(), tz()); |
| Calendar thatcal = normalizeCalendar(val.calendar(), val.tz()); |
| |
| return thiscal.before(thatcal); |
| } |
| |
| /** |
| * Comparison on this and the supplied dates (taking timezones into account) |
| * |
| * @param arg |
| * XSDate representation of the date to compare to |
| * @throws DynamicError |
| * @return True if in time, this date lies after the date supplied. False |
| * otherwise. |
| */ |
| public boolean gt(AnyType arg, DynamicContext context) throws DynamicError { |
| XSDate val = (XSDate) NumericType.get_single_type((Item)arg, XSDate.class); |
| Calendar thiscal = normalizeCalendar(calendar(), tz()); |
| Calendar thatcal = normalizeCalendar(val.calendar(), val.tz()); |
| |
| return thiscal.after(thatcal); |
| } |
| |
| // XXX this is incorrect [epoch] |
| /** |
| * Currently unsupported method. Retrieves the date in milliseconds since |
| * the begining of epoch |
| * |
| * @return Number of milliseconds since the begining of the epoch |
| */ |
| public double value() { |
| return calendar().getTimeInMillis() / 1000.0; |
| } |
| |
| // math |
| /** |
| * Mathematical minus operator between this XSDate and a supplied result |
| * sequence (XSDate, XSYearMonthDuration and XSDayTimeDuration are only |
| * valid ones). |
| * |
| * @param arg |
| * The supplied ResultSequence that is on the right of the minus |
| * operator. If this is an XSDate, the result will be a |
| * XSDayTimeDuration of the duration of time between these two |
| * dates. If arg is an XSYearMonthDuration or an |
| * XSDayTimeDuration the result will be a XSDate of the result of |
| * the current date minus the duration of time supplied. |
| * @return New ResultSequence consisting of the result of the mathematical |
| * minus operation. |
| */ |
| public ResultSequence minus(ResultSequence arg) throws DynamicError { |
| if (arg.size() != 1) |
| throw DynamicError.throw_type_error(); |
| |
| Item at = arg.first(); |
| |
| if (!(at instanceof XSDate) && !(at instanceof XSYearMonthDuration) |
| && !(at instanceof XSDayTimeDuration)) { |
| throw DynamicError.throw_type_error(); |
| } |
| |
| if (at instanceof XSDate) { |
| return minusXSDate(arg); |
| } |
| |
| if (at instanceof XSYearMonthDuration) { |
| return minusXSYearMonthDuration((XSYearMonthDuration)at); |
| } |
| |
| if (at instanceof XSDayTimeDuration) { |
| return minusXSDayTimeDuration((XSDayTimeDuration)at); |
| } |
| |
| return null; |
| } |
| |
| private ResultSequence minusXSDayTimeDuration(AnyType at) { |
| XSDuration val = (XSDuration) at; |
| |
| try { |
| XSDate res = (XSDate) clone(); |
| XMLGregorianCalendar xmlCal = _datatypeFactory |
| .newXMLGregorianCalendar( |
| (GregorianCalendar) calendar()); |
| Duration dtduration = _datatypeFactory |
| .newDuration(val.getStringValue()); |
| xmlCal.add(dtduration.negate()); |
| res = new XSDate(xmlCal.toGregorianCalendar(), res.tz()); |
| return ResultSequenceFactory.create_new(res); |
| } catch (CloneNotSupportedException ex) { |
| } |
| return null; |
| } |
| |
| private ResultSequence minusXSYearMonthDuration(AnyType at) { |
| XSYearMonthDuration val = (XSYearMonthDuration) at; |
| try { |
| XSDate res = (XSDate) clone(); |
| |
| res.calendar().add(Calendar.MONTH, val.monthValue() * -1); |
| return ResultSequenceFactory.create_new(res); |
| } catch (CloneNotSupportedException ex) { |
| |
| } |
| return null; |
| } |
| |
| private ResultSequence minusXSDate(ResultSequence arg) throws DynamicError { |
| XSDate val = (XSDate) NumericType.get_single_type(arg, XSDate.class); |
| Duration dtduration = null; |
| Calendar thisCal = normalizeCalendar(calendar(), tz()); |
| Calendar thatCal = normalizeCalendar(val.calendar(), val.tz()); |
| long duration = thisCal.getTimeInMillis() |
| - thatCal.getTimeInMillis(); |
| dtduration = _datatypeFactory.newDuration(duration); |
| return ResultSequenceFactory.create_new(XSDayTimeDuration |
| .parseDTDuration(dtduration.toString())); |
| } |
| |
| /** |
| * Mathematical addition operator between this XSDate and a supplied result |
| * sequence (XDTYearMonthDuration and XDTDayTimeDuration are only valid |
| * ones). |
| * |
| * @param arg |
| * The supplied ResultSequence that is on the right of the minus |
| * operator. If arg is an XDTYearMonthDuration or an |
| * XDTDayTimeDuration the result will be a XSDate of the result |
| * of the current date minus the duration of time supplied. |
| * @return New ResultSequence consisting of the result of the mathematical |
| * minus operation. |
| */ |
| public ResultSequence plus(ResultSequence arg) throws DynamicError { |
| if (arg.size() != 1) |
| DynamicError.throw_type_error(); |
| |
| Item at = arg.first(); |
| |
| try { |
| if (at instanceof XSYearMonthDuration) { |
| XSYearMonthDuration val = (XSYearMonthDuration) at; |
| |
| XSDate res = (XSDate) clone(); |
| |
| res.calendar().add(Calendar.MONTH, val.monthValue()); |
| return ResultSequenceFactory.create_new(res); |
| } else if (at instanceof XSDayTimeDuration) { |
| XSDayTimeDuration val = (XSDayTimeDuration) at; |
| |
| XSDate res = (XSDate) clone(); |
| |
| // We only need to add the Number of days dropping the rest. |
| int days = val.days(); |
| if (val.negative()) { |
| days *= -1; |
| } |
| res.calendar().add(Calendar.DAY_OF_MONTH, days); |
| |
| res.calendar().add(Calendar.MILLISECOND, |
| (int) (val.time_value() * 1000.0)); |
| return ResultSequenceFactory.create_new(res); |
| } else { |
| DynamicError.throw_type_error(); |
| return null; // unreach |
| } |
| } catch (CloneNotSupportedException err) { |
| assert false; |
| return null; |
| } |
| |
| } |
| public TypeDefinition getTypeDefinition() { |
| return BuiltinTypeLibrary.XS_DATE; |
| } |
| |
| } |