org.topbraid.sparql.functions
Class Count

java.lang.Object
  com.hp.hpl.jena.sparql.pfunction.PropertyFunctionBase
      org.topbraid.sparql.functions.Count

All Implemented Interfaces:

com.hp.hpl.jena.sparql.pfunction.PropertyFunction

public class Count
extends com.hp.hpl.jena.sparql.pfunction.PropertyFunctionBase

Name of the property function: spam:count

The query has two modes:

?count spam:count ([subject] [predicate] [object]) : Calculates the count of the ([subject] [predicate] [object]) statement from the current ontology and assigns the result to the ?count variable on the left.

?count spam:count "SELECT ... WHERE {...}" : Calculates the count of the result set from the nested SELECT query. If the variables inside the nested query are mentioned in the surrounding execution context, then they are pre-binded before the nested query is executed. It assigns the result to the ?count variable on the left.

(It is recommended that FILTERs are used only with the second mode)

Constructor Summary

Count()

Method Summary

com.hp.hpl.jena.sparql.engine.QueryIterator

exec(com.hp.hpl.jena.sparql.engine.binding.Binding binding, com.hp.hpl.jena.sparql.pfunction.PropFuncArg argSubject, com.hp.hpl.jena.graph.Node predicate, com.hp.hpl.jena.sparql.pfunction.PropFuncArg argObject, com.hp.hpl.jena.sparql.engine.ExecutionContext execCxt)

Methods inherited from class com.hp.hpl.jena.sparql.pfunction.PropertyFunctionBase

build, exec

Methods inherited from class java.lang.Object

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

Constructor Detail

Count

public Count()

Method Detail

exec

public com.hp.hpl.jena.sparql.engine.QueryIterator exec(com.hp.hpl.jena.sparql.engine.binding.Binding binding,
                                                        com.hp.hpl.jena.sparql.pfunction.PropFuncArg argSubject,
                                                        com.hp.hpl.jena.graph.Node predicate,
                                                        com.hp.hpl.jena.sparql.pfunction.PropFuncArg argObject,
                                                        com.hp.hpl.jena.sparql.engine.ExecutionContext execCxt)

Specified by:

exec in class com.hp.hpl.jena.sparql.pfunction.PropertyFunctionBase