net.sf.saxon.functions.AccessorFn Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of Saxon-HE Show documentation
Show all versions of Saxon-HE Show documentation
The XSLT and XQuery Processor
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2018-2022 Saxonica Limited
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
// This Source Code Form is "Incompatible With Secondary Licenses", as defined by the Mozilla Public License, v. 2.0.
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
package net.sf.saxon.functions;
import net.sf.saxon.expr.XPathContext;
import net.sf.saxon.om.Item;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.transpile.CSharpSimpleEnum;
import net.sf.saxon.value.AtomicValue;
import net.sf.saxon.value.Int64Value;
import net.sf.saxon.value.IntegerValue;
/**
* This class supports the get_X_from_Y functions defined in XPath 2.0
*/
public abstract class AccessorFn extends ScalarSystemFunction {
@CSharpSimpleEnum
public enum Component {
YEAR, MONTH, DAY, HOURS, MINUTES, SECONDS, TIMEZONE,
LOCALNAME, NAMESPACE, PREFIX, MICROSECONDS, NANOSECONDS, WHOLE_SECONDS, YEAR_ALLOWING_ZERO
}
public abstract Component getComponentId();
/**
* For an expression that returns an integer or a sequence of integers, get
* a lower and upper bound on the values of the integers that may be returned, from
* static analysis. The default implementation returns null, meaning "unknown" or
* "not applicable". Other implementations return an array of two IntegerValue objects,
* representing the lower and upper bounds respectively. The values
* UNBOUNDED_LOWER and UNBOUNDED_UPPER are used by convention to indicate that
* the value may be arbitrarily large. The values MAX_STRING_LENGTH and MAX_SEQUENCE_LENGTH
* are used to indicate values limited by the size of a string or the size of a sequence.
*
* @return the lower and upper bounds of integer values in the result, or null to indicate
* unknown or not applicable.
*/
//@Override
@Override
public IntegerValue[] getIntegerBounds() {
switch (getComponentId()) {
case YEAR:
return new IntegerValue[]{Int64Value.makeIntegerValue(-100000), Int64Value.makeIntegerValue(+100000)};
case MONTH:
return new IntegerValue[]{Int64Value.makeIntegerValue(-11), Int64Value.makeIntegerValue(+11)};
case DAY:
return new IntegerValue[]{Int64Value.makeIntegerValue(-31), Int64Value.makeIntegerValue(+31)};
case HOURS:
return new IntegerValue[]{Int64Value.makeIntegerValue(-24), Int64Value.makeIntegerValue(+24)};
case MINUTES:
return new IntegerValue[]{Int64Value.makeIntegerValue(-59), Int64Value.makeIntegerValue(+59)};
case SECONDS:
return new IntegerValue[]{Int64Value.makeIntegerValue(-59), Int64Value.makeIntegerValue(+59)};
default:
return null;
}
}
/**
* Evaluate the expression
*/
@Override
public AtomicValue evaluate(Item item, XPathContext context) throws XPathException {
return ((AtomicValue)item).getComponent(getComponentId());
}
@Override
public String getCompilerName() {
return "AccessorFnCompiler";
}
public static class YearFromDateTime extends AccessorFn {
@Override
public Component getComponentId() {
return Component.YEAR;
}
}
public static class MonthFromDateTime extends AccessorFn {
@Override
public Component getComponentId() {
return Component.MONTH;
}
}
public static class DayFromDateTime extends AccessorFn {
@Override
public Component getComponentId() {
return Component.DAY;
}
}
public static class HoursFromDateTime extends AccessorFn {
@Override
public Component getComponentId() {
return Component.HOURS;
}
}
public static class MinutesFromDateTime extends AccessorFn {
@Override
public Component getComponentId() {
return Component.MINUTES;
}
}
public static class SecondsFromDateTime extends AccessorFn {
@Override
public Component getComponentId() {
return Component.SECONDS;
}
}
public static class TimezoneFromDateTime extends AccessorFn {
@Override
public Component getComponentId() {
return Component.TIMEZONE;
}
}
public static class YearFromDate extends AccessorFn {
@Override
public Component getComponentId() {
return Component.YEAR;
}
}
public static class MonthFromDate extends AccessorFn {
@Override
public Component getComponentId() {
return Component.MONTH;
}
}
public static class DayFromDate extends AccessorFn {
@Override
public Component getComponentId() {
return Component.DAY;
}
}
public static class TimezoneFromDate extends AccessorFn {
@Override
public Component getComponentId() {
return Component.TIMEZONE;
}
}
public static class HoursFromTime extends AccessorFn {
@Override
public Component getComponentId() {
return Component.HOURS;
}
}
public static class MinutesFromTime extends AccessorFn {
@Override
public Component getComponentId() {
return Component.MINUTES;
}
}
public static class SecondsFromTime extends AccessorFn {
@Override
public Component getComponentId() {
return Component.SECONDS;
}
}
public static class TimezoneFromTime extends AccessorFn {
@Override
public Component getComponentId() {
return Component.TIMEZONE;
}
}
public static class YearsFromDuration extends AccessorFn {
@Override
public Component getComponentId() {
return Component.YEAR;
}
}
public static class MonthsFromDuration extends AccessorFn {
@Override
public Component getComponentId() {
return Component.MONTH;
}
}
public static class DaysFromDuration extends AccessorFn {
@Override
public Component getComponentId() {
return Component.DAY;
}
}
public static class HoursFromDuration extends AccessorFn {
@Override
public Component getComponentId() {
return Component.HOURS;
}
}
public static class MinutesFromDuration extends AccessorFn {
@Override
public Component getComponentId() {
return Component.MINUTES;
}
}
public static class SecondsFromDuration extends AccessorFn {
@Override
public Component getComponentId() {
return Component.SECONDS;
}
}
public static class LocalNameFromQName extends AccessorFn {
@Override
public Component getComponentId() {
return Component.LOCALNAME;
}
}
public static class PrefixFromQName extends AccessorFn {
@Override
public Component getComponentId() {
return Component.PREFIX;
}
}
public static class NamespaceUriFromQName extends AccessorFn {
@Override
public Component getComponentId() {
return Component.NAMESPACE;
}
}
}