Module org.apache.jena.arq

Package org.apache.jena.sparql.service.single

Class ChainingServiceExecutorWrapper

java.lang.Object

org.apache.jena.sparql.service.single.ChainingServiceExecutorWrapper

All Implemented Interfaces:

ChainingServiceExecutor

public class ChainingServiceExecutorWrapper
extends Object
implements ChainingServiceExecutor

Turns a ServiceExecutor into a chaining one. Mainly used by ServiceExecutorRegistry for wrapping non-chaining service executors. If the executor returns null then the next link in the chain will be tried.

Constructor Summary

Constructors

Constructor	Description
ChainingServiceExecutorWrapper(ServiceExecutor executor)

Method Summary

Modifier and Type	Method	Description
QueryIterator	createExecution(OpService opExecute, OpService opOriginal, Binding binding, ExecutionContext execCxt, ServiceExecutor chain)	If this factory cannot handle the execution request then this method should return null.
ServiceExecutor	getDelegate()

Methods inherited from class java.lang.Object

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

Constructor Details

ChainingServiceExecutorWrapper

public ChainingServiceExecutorWrapper(ServiceExecutor executor)

Method Details

getDelegate

public ServiceExecutor getDelegate()

createExecution

public QueryIterator createExecution(OpService opExecute,
 OpService opOriginal,
 Binding binding,
 ExecutionContext execCxt,
 ServiceExecutor chain)

Description copied from interface: ChainingServiceExecutor

If this factory cannot handle the execution request then this method should return null. Otherwise, a QueryIterator is returned.

Specified by:

createExecution in interface ChainingServiceExecutor

Returns:

A QueryIterator if this factory can handle the request, or null otherwise.