org.eclipse.rdf4j.query.algebra.evaluation.function.xsd

Class IntegerCastFunction

java.lang.Object

org.eclipse.rdf4j.query.algebra.evaluation.function.xsd.CastFunction

org.eclipse.rdf4j.query.algebra.evaluation.function.xsd.IntegerCastFunction

All Implemented Interfaces:

Function

Direct Known Subclasses:

ByteCast, IntCast, IntegerCast, LongCast, NegativeIntegerCast, NonNegativeIntegerCast, NonPositiveIntegerCast, PositiveIntegerCast, ShortCast, UnsignedByteCast, UnsignedIntCast, UnsignedLongCast, UnsignedShortCast

public abstract class IntegerCastFunction
extends CastFunction

Abstract superclass for CastFunctions that cast their arguments to an xsd:integer or one of its derived types.

Author:

Jeen Broekstra

Constructor Summary

Constructors

Constructor and Description
IntegerCastFunction()

Method Summary

Modifier and Type	Method and Description
protected org.eclipse.rdf4j.model.Literal	convert(org.eclipse.rdf4j.model.ValueFactory valueFactory, org.eclipse.rdf4j.model.Value value) Convert the supplied value to a literal of the function output datatype.
protected abstract Optional<org.eclipse.rdf4j.model.Literal>	createTypedLiteral(org.eclipse.rdf4j.model.ValueFactory vf, BigInteger integerValue) create a Literal with the specific datatype for the supplied BigInteger value.
protected Optional<org.eclipse.rdf4j.model.Literal>	createTypedLiteral(org.eclipse.rdf4j.model.ValueFactory vf, boolean booleanValue) create a Literal with the specific datatype for the supplied boolean value.

Methods inherited from class org.eclipse.rdf4j.query.algebra.evaluation.function.xsd.CastFunction

evaluate, getURI, getXsdDatatype, getXsdName, isValidForDatatype, typeError

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.rdf4j.query.algebra.evaluation.function.Function

evaluate

Constructor Detail

IntegerCastFunction

public IntegerCastFunction()

Method Detail

convert

protected org.eclipse.rdf4j.model.Literal convert(org.eclipse.rdf4j.model.ValueFactory valueFactory,
                                                  org.eclipse.rdf4j.model.Value value)
                                           throws ValueExprEvaluationException

Description copied from class: CastFunction

Convert the supplied value to a literal of the function output datatype.

Specified by:

convert in class CastFunction

Parameters:

valueFactory - the valueFactory to use

value - a value that is not a string-typed literal, and not a literal of the same datatype as the function output datatype.

Returns:

a literal value of the function output datatype

Throws:

ValueExprEvaluationException - if an error occurs in conversion.

createTypedLiteral

protected abstract Optional<org.eclipse.rdf4j.model.Literal> createTypedLiteral(org.eclipse.rdf4j.model.ValueFactory vf,
                                                                                BigInteger integerValue)
                                                                         throws ArithmeticException

create a Literal with the specific datatype for the supplied BigInteger value.

Parameters:

vf - the ValueFactory to use for creating the Literal

integerValue - the integer value to use for creating the Literal

Returns:

an Optional literal value, which may be empty if the supplied integerValue can not be successfully converted to the specific datatype.

Throws:

ArithmeticException - if an error occurs when attempting to convert the supplied value to a value of the specific datatype.

createTypedLiteral

protected Optional<org.eclipse.rdf4j.model.Literal> createTypedLiteral(org.eclipse.rdf4j.model.ValueFactory vf,
                                                                       boolean booleanValue)

create a Literal with the specific datatype for the supplied boolean value.

Parameters:

vf - the ValueFactory to use for creating the Literal

booleanValue - the boolean value to use for creating the Literal

Returns:

an Optional literal value, which may be empty if the supplied boolean value can not be successfully converted to the specific datatype.