/* * eXist Open Source Native XML Database * Copyright (C) 2001-2007 The eXist Project * http://exist-db.org * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program; if not, write to the Free Software Foundation * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * * $Id$ */ package org.exist.xquery.value; import java.text.Collator; import java.util.GregorianCalendar; import javax.xml.datatype.DatatypeConstants; import javax.xml.datatype.XMLGregorianCalendar; import javax.xml.namespace.QName; import org.exist.xquery.Constants; import org.exist.xquery.XPathException; public class GYearMonthValue extends AbstractDateTimeValue { public GYearMonthValue() throws XPathException { super(stripCalendar(TimeUtils.getInstance().newXMLGregorianCalendar(new GregorianCalendar()))); } public GYearMonthValue(XMLGregorianCalendar calendar) throws XPathException { super(stripCalendar((XMLGregorianCalendar) calendar.clone())); } public GYearMonthValue(String timeValue) throws XPathException { super(timeValue); try { if (calendar.getXMLSchemaType() != DatatypeConstants.GYEARMONTH) throw new IllegalStateException(); } catch (IllegalStateException e) { throw new XPathException("xs:gYearMonth instance must not have year, month or day fields set"); } } private static XMLGregorianCalendar stripCalendar(XMLGregorianCalendar calendar) { calendar = (XMLGregorianCalendar) calendar.clone(); calendar.setDay(DatatypeConstants.FIELD_UNDEFINED); calendar.setHour(DatatypeConstants.FIELD_UNDEFINED); calendar.setMinute(DatatypeConstants.FIELD_UNDEFINED); calendar.setSecond(DatatypeConstants.FIELD_UNDEFINED); calendar.setMillisecond(DatatypeConstants.FIELD_UNDEFINED); return calendar; } public AtomicValue convertTo(int requiredType) throws XPathException { switch (requiredType) { case Type.GYEARMONTH : case Type.ATOMIC : case Type.ITEM : return new GYearMonthValue(this.calendar); case Type.STRING : return new StringValue(getStringValue()); case Type.UNTYPED_ATOMIC : return new UntypedAtomicValue(getStringValue()); default : throw new XPathException( "Type error: cannot cast xs:time to " + Type.getTypeName(requiredType)); } } protected AbstractDateTimeValue createSameKind(XMLGregorianCalendar cal) throws XPathException { return new GYearMonthValue(cal); } public int getType() { return Type.GYEARMONTH; } protected QName getXMLSchemaType() { return DatatypeConstants.GYEARMONTH; } public int compareTo(Collator collator, AtomicValue other) throws XPathException { if (other.getType() == getType()) { if (!getTimezone().isEmpty()) { if (!((AbstractDateTimeValue) other).getTimezone().isEmpty()) { if (!((DayTimeDurationValue)getTimezone().itemAt(0)).compareTo(null, Constants.EQ, (DayTimeDurationValue)((AbstractDateTimeValue)other).getTimezone().itemAt(0))) { return DatatypeConstants.LESSER; } else { // equal? Is this sufficient? /ljo if (this.getTrimmedCalendar().compare(((AbstractDateTimeValue) other).getTrimmedCalendar()) == 0) return DatatypeConstants.EQUAL; if (!((DayTimeDurationValue)getTimezone().itemAt(0)).getStringValue().equals("PT0S")) return DatatypeConstants.LESSER; } } else { if (!((AbstractDateTimeValue)other).getTimezone().isEmpty()) { if (!((DayTimeDurationValue)((AbstractDateTimeValue)other).getTimezone().itemAt(0)).getStringValue().equals("PT0S")) return DatatypeConstants.LESSER; } } } // filling in missing timezones with local timezone, should be total order as per XPath 2.0 10.4 int r = this.getTrimmedCalendar().compare(((AbstractDateTimeValue) other).getTrimmedCalendar()); //getImplicitCalendar().compare(((AbstractDateTimeValue) other).getImplicitCalendar()); if (r == DatatypeConstants.INDETERMINATE) throw new RuntimeException("indeterminate order between " + this + " and " + other); return r; } throw new XPathException( "Type error: cannot compare " + Type.getTypeName(getType()) + " to " + Type.getTypeName(other.getType())); } public ComputableValue minus(ComputableValue other) throws XPathException { throw new XPathException("Subtraction is not supported on values of type " + Type.getTypeName(getType())); } }