org.openrdf.query.algebra.evaluation.util
Class MathUtil

java.lang.Object
  org.openrdf.query.algebra.evaluation.util.MathUtil

public class MathUtil
extends Object

A utility class for evaluation of mathematical expressions on RDF literals.

Author:

Jeen Broekstra

Constructor Summary

MathUtil()

Method Summary

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.

Methods inherited from class java.lang.Object

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

Constructor Detail

MathUtil

public MathUtil()

Method Detail

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 numeric datatype literal

rightLit - a numeric datatype literal

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

Returns:

a numeric datatype literal containing the result of the operation. The result will be datatype according to the most specific data type the two operands have in common per the SPARQL/XPath spec.

Throws:

ValueExprEvaluationException