net.fortytwo.ripple.query

Class LazyEvaluatingIterator

java.lang.Object

net.fortytwo.ripple.query.LazyEvaluatingIterator

All Implemented Interfaces:

info.aduna.iteration.CloseableIteration<RippleList,RippleException>, info.aduna.iteration.Iteration<RippleList,RippleException>

public class LazyEvaluatingIterator
extends Object
implements info.aduna.iteration.CloseableIteration<RippleList,RippleException>

A "pull-based" program evaluator which uses Ripple's lazy evaluation strategy but generates solutions incrementally based on calls to next(), rather than pushing all solutions to a stream. Note: this iterator is for single-threaded evaluation only. User: josh Date: 6/17/11 Time: 4:03 PM

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	LazyEvaluatingIterator.WrappingEvaluator

Constructor Summary

Constructors

Constructor and Description
LazyEvaluatingIterator(RippleList stack, ModelConnection mc)

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
boolean	hasNext()
RippleList	next()
void	remove()

Methods inherited from class java.lang.Object

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

Constructor Detail

LazyEvaluatingIterator

public LazyEvaluatingIterator(RippleList stack,
                      ModelConnection mc)

Method Detail

hasNext

public boolean hasNext()
                throws RippleException

Specified by:

hasNext in interface info.aduna.iteration.Iteration<RippleList,RippleException>

Throws:

RippleException

next

public RippleList next()

Specified by:

next in interface info.aduna.iteration.Iteration<RippleList,RippleException>

remove

public void remove()

Specified by:

remove in interface info.aduna.iteration.Iteration<RippleList,RippleException>

close

public void close()
           throws RippleException

Specified by:

close in interface info.aduna.iteration.CloseableIteration<RippleList,RippleException>

Throws:

RippleException