FedXQueueCursor (Eclipse RDF4J 4.2.4)

java.lang.Object
- org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<E,X>
- - org.eclipse.rdf4j.common.iteration.LookAheadIteration<E,T>
  - - org.eclipse.rdf4j.common.iteration.QueueIteration<E,QueryEvaluationException>
    - - org.eclipse.rdf4j.query.impl.QueueCursor<CloseableIteration<T,QueryEvaluationException>>
      - org.eclipse.rdf4j.federated.evaluation.concurrent.FedXQueueCursor<T>

Type Parameters:

T -

All Implemented Interfaces:

AutoCloseable, CloseableIteration<CloseableIteration<T,QueryEvaluationException>,QueryEvaluationException>, Iteration<CloseableIteration<T,QueryEvaluationException>,QueryEvaluationException>
```
public class FedXQueueCursor<T>
extends QueueCursor<CloseableIteration<T,QueryEvaluationException>>
```
Specialized variants of QueueCursor which avoids converting any exception if it is already of typeQueryEvaluationException.

Author:

Andreas Schwarte

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected QueryEvaluationException`	`convert(Exception e)`	Converts an exception from the underlying iteration to an exception of type `X`.
`static <T> FedXQueueCursor<T>`	`create(int capacity)`
`static <T> FedXQueueCursor<T>`	`create(int capacity, WeakReference<?> callerReference)`
`void`	`handleClose()`	Called by `AbstractCloseableIteration.close()` when it is called for the first time.

Methods inherited from class org.eclipse.rdf4j.common.iteration.QueueIteration
checkException, done, getNextElement, put, toss

Methods inherited from class org.eclipse.rdf4j.common.iteration.LookAheadIteration
hasNext, next, remove

Methods inherited from class org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration
close, isClosed

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.common.iteration.CloseableIteration
stream

- Method Detail
  - create
```
public static <T> FedXQueueCursor<T> create(int capacity,
                                            WeakReference<?> callerReference)
```
  - create
```
public static <T> FedXQueueCursor<T> create(int capacity)
```
  - convert
```
protected QueryEvaluationException convert(Exception e)
```
    Description copied from class: QueueIteration
    
    Converts an exception from the underlying iteration to an exception of type X.
    
    Overrides:
    
    convert in class QueueCursor<CloseableIteration<T,QueryEvaluationException>>
  - handleClose
```
public void handleClose()
                 throws QueryEvaluationException
```
    Description copied from class: AbstractCloseableIteration
    
    Called by AbstractCloseableIteration.close() when it is called for the first time. This method is only called once on each iteration. By default, this method does nothing.
    
    Overrides:
    
    handleClose in class QueueIteration<CloseableIteration<T,QueryEvaluationException>,QueryEvaluationException>
    
    Throws:
    
    QueryEvaluationException