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[bugfix] made date calculation efficient #5593

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[bugfix] made date calculation efficient #5593

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30 changes: 25 additions & 5 deletions exist-core/src/main/java/org/exist/xquery/value/OrderedDurationValue.java
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Original file line number Diff line number Diff line change
Expand Up @@ -29,9 +29,13 @@
import org.exist.xquery.XPathException;

import javax.xml.datatype.DatatypeConstants;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.Duration;
import javax.xml.datatype.XMLGregorianCalendar;
import java.math.BigDecimal;
import java.time.LocalDate;
import java.time.ZoneId;
import java.util.GregorianCalendar;

/**
* @author <a href="mailto:[email protected]">Piotr Kaminski</a>
Expand Down Expand Up @@ -155,12 +159,28 @@ public ComputableValue plus(ComputableValue other) throws XPathException {
case Type.DATE:
final AbstractDateTimeValue date = (AbstractDateTimeValue) other;
final XMLGregorianCalendar gc = (XMLGregorianCalendar) date.calendar.clone();
gc.add(duration);
//Shift one year
if (gc.getYear() < 0) {
gc.setYear(gc.getYear() - 1);
LocalDate localDate = gc.toGregorianCalendar().toZonedDateTime().toLocalDate();
LocalDate updatedDate = null;

long days = duration.getField(DatatypeConstants.DAYS).longValue();
if (days > Integer.MAX_VALUE) {
while (days > Integer.MAX_VALUE) {
updatedDate = localDate.plusDays(Integer.MAX_VALUE);
days -= Integer.MAX_VALUE;
}
} else {
updatedDate = localDate.plusDays(duration.getDays());
}

GregorianCalendar gregorianCalendar = GregorianCalendar.from(updatedDate.atStartOfDay(ZoneId.systemDefault()));
XMLGregorianCalendar updatedGc = null;
try {
updatedGc = DatatypeFactory.newInstance().newXMLGregorianCalendar(gregorianCalendar);
} catch (final Exception E) {
return null;
}
return date.createSameKind(gc);

return date.createSameKind(updatedGc);
default:
throw new XPathException(getExpression(), ErrorCodes.XPTY0004, "cannot add " +
Type.getTypeName(other.getType()) + "('" + other.getStringValue() + "') from " +
Expand Down
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