org.eaglei.repository.util
Class UpperCaseStr

java.lang.Object
  org.eaglei.repository.util.UpperCaseStr

All Implemented Interfaces:

org.openrdf.query.algebra.evaluation.function.Function

public class UpperCaseStr
extends java.lang.Object
implements org.openrdf.query.algebra.evaluation.function.Function

Custom SPARQL query function, repo:upperCaseStr. It returns the toUpperCase() version of of hte string value of an RDF value. Use it to sort values IGNORING whether (a) the case of characters differs, (b) they are datatyped-literals or untyped literals (or other terms). This implementation may be specifc to Sesame 2.3, it depends on loosely-documented interfaces. To invoke it you must have the repository's URI namespace defined as a prefix, e.g. PREFIX repo: .... ORDER BY repo:upperCaseStr(?label) NOTE that this Function implementation is connected to the query evaluator passively, by listing its class in the resource file: META-INF/services/org.openrdf.query.algebra.evaluation.function.Function Larry Stone - August 2010

Constructor Summary

UpperCaseStr()

Method Summary

org.openrdf.model.Value	evaluate(org.openrdf.model.ValueFactory vf, org.openrdf.model.Value... args) Evaluate the function; returns upper case version of given string.
java.lang.String	getURI() Get name of this function as a URI

Methods inherited from class java.lang.Object

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

Constructor Detail

UpperCaseStr

public UpperCaseStr()

Method Detail

getURI

public java.lang.String getURI()

Get name of this function as a URI

Specified by:

getURI in interface org.openrdf.query.algebra.evaluation.function.Function

Returns:

evaluate

public org.openrdf.model.Value evaluate(org.openrdf.model.ValueFactory vf,
                                        org.openrdf.model.Value... args)
                                 throws org.openrdf.query.algebra.evaluation.ValueExprEvaluationException

Evaluate the function; returns upper case version of given string.

Specified by:

evaluate in interface org.openrdf.query.algebra.evaluation.function.Function

Parameters:

vf - value factory

args - string to convert

Returns:

upper case-ified string value

Throws:

org.openrdf.query.algebra.evaluation.ValueExprEvaluationException