/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-2009 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.functions;
import java.math.BigDecimal;
import javax.xml.datatype.DatatypeConstants;
import org.apache.log4j.Logger;
import org.exist.dom.QName;
import org.exist.xquery.BasicFunction;
import org.exist.xquery.Cardinality;
import org.exist.xquery.Dependency;
import org.exist.xquery.Function;
import org.exist.xquery.FunctionSignature;
import org.exist.xquery.Profiler;
import org.exist.xquery.XPathException;
import org.exist.xquery.XQueryContext;
import org.exist.xquery.value.DecimalValue;
import org.exist.xquery.value.DurationValue;
import org.exist.xquery.value.FunctionReturnSequenceType;
import org.exist.xquery.value.FunctionParameterSequenceType;
import org.exist.xquery.value.IntegerValue;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.SequenceType;
import org.exist.xquery.value.Type;
/**
*
* @author wolf
* @author piotr kaminski
*
*/
public class FunGetDurationComponent extends BasicFunction {
protected static final Logger logger = Logger.getLogger(FunGetDurationComponent.class);
public final static FunctionParameterSequenceType DAYTIME_DURA_01_PARAM = new FunctionParameterSequenceType("duration", Type.DAY_TIME_DURATION, Cardinality.ZERO_OR_ONE, "The duration as xs:dayTimeDuration");
public final static FunctionParameterSequenceType YEARMONTH_DURA_01_PARAM = new FunctionParameterSequenceType("duration", Type.YEAR_MONTH_DURATION, Cardinality.ZERO_OR_ONE, "The duration as xs:yearMonthDuration");
public final static FunctionSignature fnDaysFromDuration =
new FunctionSignature(
new QName("days-from-duration", Function.BUILTIN_FUNCTION_NS),
"Returns an xs:integer representing the days component in the canonical lexical " +
"representation of the value of $duration. The result may be negative.",
new SequenceType[] {
DAYTIME_DURA_01_PARAM
},
new FunctionReturnSequenceType(Type.INTEGER, Cardinality.ZERO_OR_ONE, "the days component of $duration"));
public final static FunctionSignature fnHoursFromDuration =
new FunctionSignature(
new QName("hours-from-duration", Function.BUILTIN_FUNCTION_NS),
"Returns an xs:integer representing the hours component in the canonical lexical " +
"representation of the value of $duration. The result may be negative.",
new SequenceType[] {
DAYTIME_DURA_01_PARAM
},
new FunctionReturnSequenceType(Type.INTEGER, Cardinality.ZERO_OR_ONE, "the hours component of $duration"));
public final static FunctionSignature fnMinutesFromDuration =
new FunctionSignature(
new QName("minutes-from-duration", Function.BUILTIN_FUNCTION_NS),
"Returns an xs:integer representing the minutes component in the canonical " +
"lexical representation of the value of $duration. The result may be negative.",
new SequenceType[] {
DAYTIME_DURA_01_PARAM
},
new FunctionReturnSequenceType(Type.INTEGER, Cardinality.ZERO_OR_ONE, "the minutes component of $duration"));
public final static FunctionSignature fnSecondsFromDuration =
new FunctionSignature(
new QName("seconds-from-duration", Function.BUILTIN_FUNCTION_NS),
"Returns an xs:decimal representing the seconds component in the canonical lexical " +
"representation of the value of $duration. The result may be negative",
new SequenceType[] {
DAYTIME_DURA_01_PARAM
},
new FunctionReturnSequenceType(Type.DECIMAL, Cardinality.ZERO_OR_ONE, "the seconds component of $duration"));
public final static FunctionSignature fnMonthsFromDuration = new FunctionSignature(
new QName("months-from-duration", Function.BUILTIN_FUNCTION_NS),
"Returns an xs:integer representing the months component in the canonical lexical " +
"representation of the value of $duration. The result may be negative.",
new SequenceType[] {
YEARMONTH_DURA_01_PARAM
},
new FunctionReturnSequenceType(Type.INTEGER, Cardinality.ZERO_OR_ONE, "the months component of $duration"));
public final static FunctionSignature fnYearsFromDuration = new FunctionSignature(
new QName("years-from-duration", Function.BUILTIN_FUNCTION_NS),
"Returns an xs:integer representing the years component in the canonical lexical " +
"representation of the value of $duration. The result may be negative.",
new SequenceType[] {
YEARMONTH_DURA_01_PARAM
},
new FunctionReturnSequenceType(Type.INTEGER, Cardinality.ZERO_OR_ONE, "the years component of $duration"));
public FunGetDurationComponent(XQueryContext context, FunctionSignature signature) {
super(context, signature);
}
public Sequence eval(Sequence[] args, Sequence contextSequence)
throws XPathException {
if (context.getProfiler().isEnabled()) {
context.getProfiler().start(this);
context.getProfiler().message(this, Profiler.DEPENDENCIES, "DEPENDENCIES",
Dependency.getDependenciesName(this.getDependencies()));
if (contextSequence != null)
context.getProfiler().message(this, Profiler.START_SEQUENCES,
"CONTEXT SEQUENCE", contextSequence);
}
Sequence result;
if (args.length == 0 || args[0].isEmpty()) {
result = Sequence.EMPTY_SEQUENCE;
} else {
Sequence arg = args[0];
DurationValue duration = new DurationValue(((DurationValue) arg.itemAt(0)).getCanonicalDuration());
if (isCalledAs("days-from-duration")) {
result = new IntegerValue(duration.getPart(DurationValue.DAY));
} else if (isCalledAs("hours-from-duration")) {
result = new IntegerValue(duration.getPart(DurationValue.HOUR));
} else if (isCalledAs("minutes-from-duration")) {
result = new IntegerValue(duration.getPart(DurationValue.MINUTE));
} else if (isCalledAs("seconds-from-duration")) {
if (duration.getCanonicalDuration().getField(DatatypeConstants.SECONDS) == null)
result = new DecimalValue(0);
else
result = new DecimalValue((BigDecimal)duration.getCanonicalDuration().getField(DatatypeConstants.SECONDS));
if (duration.getCanonicalDuration().getSign() < 0)
result = ((DecimalValue)result).negate();
} else if (isCalledAs("months-from-duration")) {
result = new IntegerValue(duration.getPart(DurationValue.MONTH));
} else if (isCalledAs("years-from-duration")) {
result = new IntegerValue(duration.getPart(DurationValue.YEAR));
} else {
logger.error("can't handle function " + mySignature.getName().getLocalName());
throw new Error("can't handle function " + mySignature.getName().getLocalName());
}
}
if (context.getProfiler().isEnabled())
context.getProfiler().end(this, "", result);
return result;
}
}