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

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.