/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-04 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id$
*/
package org.exist.xquery.value;
import java.util.GregorianCalendar;
import javax.xml.datatype.DatatypeConstants;
import javax.xml.datatype.XMLGregorianCalendar;
import javax.xml.namespace.QName;
import org.exist.xquery.XPathException;
public class GYearValue extends AbstractDateTimeValue {
public GYearValue() throws XPathException {
super(stripCalendar(TimeUtils.getInstance().newXMLGregorianCalendar(new GregorianCalendar())));
}
public GYearValue(XMLGregorianCalendar calendar) throws XPathException {
super(stripCalendar((XMLGregorianCalendar) calendar.clone()));
}
public GYearValue(String timeValue) throws XPathException {
super(timeValue);
try {
if (calendar.getXMLSchemaType() != DatatypeConstants.GYEAR) {throw new IllegalStateException();}
} catch (final IllegalStateException e) {
throw new XPathException("xs:time instance must not have year, month or day fields set");
}
}
private static XMLGregorianCalendar stripCalendar(XMLGregorianCalendar calendar) {
calendar = (XMLGregorianCalendar) calendar.clone();
calendar.setMonth(DatatypeConstants.FIELD_UNDEFINED);
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.GYEAR :
case Type.ATOMIC :
case Type.ITEM :
return this;
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 GYearValue(cal);
}
public int getType() {
return Type.GYEAR;
}
protected QName getXMLSchemaType() {
return DatatypeConstants.GYEAR;
}
public ComputableValue minus(ComputableValue other) throws XPathException {
throw new XPathException("Subtraction is not supported on values of type " +
Type.getTypeName(getType()));
}
}