org.openrdf.elmo.sesame.iterators
Class ElmoIteration<S,E>

java.lang.Object
  org.openrdf.elmo.sesame.iterators.ElmoIteration<S,E>

Type Parameters:

S - Type of the delegate (Statement)

E - Type of the result

All Implemented Interfaces:

CloseableIteration<E,ElmoException>, Iteration<E,ElmoException>, Closeable, Iterator<E>

Direct Known Subclasses:

ElmoSingleQueryResult, ElmoTupleQueryResult

public abstract class ElmoIteration<S,E>
extends Object
implements Iterator<E>, Closeable, CloseableIteration<E,ElmoException>

A general purpose iteration wrapping Sesame's iterations. This class converts the results, converts the Exceptions into ElmoRuntimeExeptions, and ensures that the iteration is closed when all values have been read (on {next()).

Author:

James Leigh

Constructor Summary

ElmoIteration(CloseableIteration<? extends S,?> delegate)

Method Summary

void	close()
static void	close(Iterator<?> iter)
protected abstract E	convert(S element)
boolean	hasNext()
E	next()
void	remove()
protected void	remove(S element)

Methods inherited from class java.lang.Object

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

Constructor Detail

ElmoIteration

public ElmoIteration(CloseableIteration<? extends S,?> delegate)

Method Detail

close

public static void close(Iterator<?> iter)

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iteration<E,ElmoException>

Specified by:

hasNext in interface Iterator<E>

next

public E next()

Specified by:

next in interface Iteration<E,ElmoException>

Specified by:

next in interface Iterator<E>

remove

public void remove()

Specified by:

remove in interface Iteration<E,ElmoException>

Specified by:

remove in interface Iterator<E>

close

public void close()

Specified by:

close in interface CloseableIteration<E,ElmoException>

Specified by:

close in interface Closeable

convert

protected abstract E convert(S element)
                      throws Exception

Throws:

Exception

remove

protected void remove(S element)
               throws Exception

Throws:

Exception