Package org.eclipse.rdf4j.query.algebra.evaluation.function.string

Class Substring

java.lang.Object

org.eclipse.rdf4j.query.algebra.evaluation.function.string.Substring

All Implemented Interfaces:

Function

public class Substring
extends Object
implements Function

The SPARQL built-in Function SUBSTR, as defined in SPARQL Query Language for RDF.

Author:

Jeen Broekstra

Constructor Summary

Constructors

Constructor	Description
Substring()

Method Summary

Modifier and Type	Method	Description
Literal	evaluate(ValueFactory valueFactory, Value... args)	Evaluate the function over the supplied input arguments, using the supplied ValueFactory to produce the result.
String	getURI()
static int	intFromLiteral(Literal literal)

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 Details

Substring

public Substring()

Method Details

getURI

public String getURI()

Specified by:

getURI in interface Function

evaluate

public Literal evaluate(ValueFactory valueFactory,
 Value... args)
                 throws ValueExprEvaluationException

Description copied from interface: Function

Evaluate the function over the supplied input arguments, using the supplied ValueFactory to produce the result.

Specified by:

evaluate in interface Function

Parameters:

valueFactory - a ValueFactory to use for producing the function result.

args - the function input arguments.

Returns:

the function result value.

Throws:

ValueExprEvaluationException

intFromLiteral

public static int intFromLiteral(Literal literal)
                          throws ValueExprEvaluationException

Throws:

ValueExprEvaluationException