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

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

Author:

Thomas Pellissier Tanon

Constructor Summary

Constructors

Constructor	Description
XMLDatatypeMathUtil()

Method Summary

Modifier and Type	Method	Description
static org.eclipse.rdf4j.model.Literal	compute(org.eclipse.rdf4j.model.Literal leftLit, org.eclipse.rdf4j.model.Literal rightLit, MathExpr.MathOp op)	Computes the result of applying the supplied math operator on the supplied left and right operand.
static org.eclipse.rdf4j.model.Literal	compute(org.eclipse.rdf4j.model.Literal leftLit, org.eclipse.rdf4j.model.Literal rightLit, MathExpr.MathOp op, org.eclipse.rdf4j.model.ValueFactory vf)	Computes the result of applying the supplied math operator on the supplied left and right operand.

Methods inherited from class java.lang.Object

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

Constructor Detail

XMLDatatypeMathUtil

public XMLDatatypeMathUtil()

Method Detail

compute

public static org.eclipse.rdf4j.model.Literal compute(org.eclipse.rdf4j.model.Literal leftLit,
                                                      org.eclipse.rdf4j.model.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 org.eclipse.rdf4j.model.Literal compute(org.eclipse.rdf4j.model.Literal leftLit,
                                                      org.eclipse.rdf4j.model.Literal rightLit,
                                                      MathExpr.MathOp op,
                                                      org.eclipse.rdf4j.model.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