PropertyFunctionBase (Apache Jena ARQ)

java.lang.Object

org.apache.jena.sparql.pfunction.PropertyFunctionBase

All Implemented Interfaces:: PropertyFunction

Direct Known Subclasses:: PropertyFunctionEval

public abstract class PropertyFunctionBase extends Object implements PropertyFunction

Basic property function handler that calls the implementation subclass one binding at a time

Method Summary

Modifier and Type

Method

Description

void

build(PropFuncArg argSubject, org.apache.jena.graph.Node predicate, PropFuncArg argObject, ExecutionContext execCxt)

Called during query plan construction immediately after the construction of the property function instance.

abstract QueryIterator

exec(Binding binding, PropFuncArg argSubject, org.apache.jena.graph.Node predicate, PropFuncArg argObject, ExecutionContext execCxt)

QueryIterator

exec(QueryIterator input, PropFuncArg argSubject, org.apache.jena.graph.Node predicate, PropFuncArg argObject, ExecutionContext execCxt)

Create an iterator of bindings for the given inputs

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details
- build
  
  public void build(PropFuncArg argSubject, org.apache.jena.graph.Node predicate, PropFuncArg argObject, ExecutionContext execCxt)
  
  Description copied from interface: PropertyFunction
  
  Called during query plan construction immediately after the construction of the property function instance.
  
  Specified by:
  
  build in interface PropertyFunction
  
  Parameters:
  
  argSubject - The parsed argument(s) in the subject position
  
  predicate - The extension URI (as a Node).
  
  argObject - The parsed argument(s) in the object position
  
  execCxt - Execution context
- exec
  
  public QueryIterator exec(QueryIterator input, PropFuncArg argSubject, org.apache.jena.graph.Node predicate, PropFuncArg argObject, ExecutionContext execCxt)
  
  Description copied from interface: PropertyFunction
  
  Create an iterator of bindings for the given inputs
  
  Specified by:
  
  exec in interface PropertyFunction
  
  Parameters:
  
  input - QueryIterator from the previous stage
  
  argSubject - The parsed argument(s) in the subject position
  
  predicate - The extension URI (as a Node).
  
  argObject - The parsed argument(s) in the object position
  
  execCxt - The execution context
  
  Returns:
  
  QueryIterator
- exec
  
  public abstract QueryIterator exec(Binding binding, PropFuncArg argSubject, org.apache.jena.graph.Node predicate, PropFuncArg argObject, ExecutionContext execCxt)