Class XMLDatatypeMathUtil

java.lang.Object

org.eclipse.rdf4j.query.algebra.evaluation.util.XMLDatatypeMathUtil

public class XMLDatatypeMathUtil
extends Object

A utility class for evaluation of extended "mathematical" expressions on RDF literals. They do not work only on numeric literals but also on durations

Constructor Summary

Constructors

Constructor	Description
XMLDatatypeMathUtil()

Method Summary

Modifier and Type	Method	Description
private static Literal	buildLiteral(Duration duration, ValueFactory vf)
static Literal	compute(Literal leftLit, Literal rightLit, MathExpr.MathOp op)	Computes the result of applying the supplied math operator on the supplied left and right operand.
static Literal	compute(Literal leftLit, Literal rightLit, MathExpr.MathOp op, ValueFactory vf)	Computes the result of applying the supplied math operator on the supplied left and right operand.
private static CoreDatatype.XSD	getDatatypeForDuration(Duration duration)
private static Literal	operationsBetweenCalendarAndDuration(Literal calendarLit, Literal durationLit, MathExpr.MathOp op, ValueFactory vf)
private static Literal	operationsBetweenDurationAndCalendar(Literal durationLit, Literal calendarLit, MathExpr.MathOp op, ValueFactory vf)
private static Literal	operationsBetweenDurationAndDecimal(Literal durationLit, Literal decimalLit, MathExpr.MathOp op, ValueFactory vf)
private static Literal	operationsBetweenDurations(Literal leftLit, Literal rightLit, MathExpr.MathOp op, ValueFactory vf)

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

XMLDatatypeMathUtil

public XMLDatatypeMathUtil()

Method Details

compute

public static Literal compute(Literal leftLit,
 Literal rightLit,
 MathExpr.MathOp op)
                       throws ValueExprEvaluationException

Computes the result of applying the supplied math operator on the supplied left and right operand.

Parameters:

leftLit - a datatype literal

rightLit - a datatype literal

op - a mathematical operator, as definied by MathExpr.MathOp.

vf - a ValueFactory used to create the result

Returns:

a datatype literal

Throws:

ValueExprEvaluationException

compute

public static Literal compute(Literal leftLit,
 Literal rightLit,
 MathExpr.MathOp op,
 ValueFactory vf)
                       throws ValueExprEvaluationException

Computes the result of applying the supplied math operator on the supplied left and right operand.

Parameters:

leftLit - a datatype literal

rightLit - a datatype literal

op - a mathematical operator, as definied by MathExpr.MathOp.

Returns:

a datatype literal

Throws:

ValueExprEvaluationException

operationsBetweenDurations

private static Literal operationsBetweenDurations(Literal leftLit,
 Literal rightLit,
 MathExpr.MathOp op,
 ValueFactory vf)

operationsBetweenDurationAndDecimal

private static Literal operationsBetweenDurationAndDecimal(Literal durationLit,
 Literal decimalLit,
 MathExpr.MathOp op,
 ValueFactory vf)

operationsBetweenCalendarAndDuration

private static Literal operationsBetweenCalendarAndDuration(Literal calendarLit,
 Literal durationLit,
 MathExpr.MathOp op,
 ValueFactory vf)

operationsBetweenDurationAndCalendar

private static Literal operationsBetweenDurationAndCalendar(Literal durationLit,
 Literal calendarLit,
 MathExpr.MathOp op,
 ValueFactory vf)

buildLiteral

private static Literal buildLiteral(Duration duration,
 ValueFactory vf)

getDatatypeForDuration

private static CoreDatatype.XSD getDatatypeForDuration(Duration duration)