com.bigdata.rdf.sail

Class RunningQueryCloseableIterator<E>

java.lang.Object

com.bigdata.rdf.sail.RunningQueryCloseableIterator<E>

All Implemented Interfaces:

ICloseable, ICloseableIterator<E>, Iterator<E>

public class RunningQueryCloseableIterator<E>
extends Object
implements ICloseableIterator<E>

Iteration construct wraps an IRunningQuery with logic to (a) verify that the IRunningQuery has not encountered an error; and (b) to cancel the IRunningQuery when the iterator draining the IRunningQuery is closed.

Constructor Summary

Constructors

Constructor and Description
RunningQueryCloseableIterator(IRunningQuery runningQuery, ICloseableIterator<E> src)

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Closes the iterator, releasing any associated resources.
boolean	hasNext()
E	next()
void	remove() Operation is not supported.

Methods inherited from class java.lang.Object

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

Constructor Detail

RunningQueryCloseableIterator

public RunningQueryCloseableIterator(IRunningQuery runningQuery,
                             ICloseableIterator<E> src)

Method Detail

close

public void close()

Description copied from interface: ICloseableIterator

Closes the iterator, releasing any associated resources. This method MAY be invoked safely if the iterator is already closed. Implementations of this interface MUST invoke ICloseableIterator.close() if Iterator.hasNext() method returns false to ensure that the iterator is closed (and its resources release) as soon as it is exhausted.

Note: Implementations that support Iterator.remove() MUST NOT eagerly close the iterator when it is exhausted since that would make it impossible to remove the last visited statement. Instead they MUST wait for an explicit ICloseableIterator.close() by the application.

Specified by:

close in interface ICloseable

Specified by:

close in interface ICloseableIterator<E>

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<E>

next

public E next()

Specified by:

next in interface Iterator<E>

remove

public void remove()

Operation is not supported.

Specified by:

remove in interface Iterator<E>