Package 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	Description
IntegerCastFunction()

Method Summary

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

Constructor Detail

IntegerCastFunction

public IntegerCastFunction()

Method Detail

convert

protected Literal convert(ValueFactory valueFactory,
                          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<Literal> createTypedLiteral(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<Literal> createTypedLiteral(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.