org.gcube.data.streams

Class LookAheadStream<E>

java.lang.Object

org.gcube.data.streams.LookAheadStream<E>

Type Parameters:

E - the type of stream elements

All Implemented Interfaces:

Iterator<E>, Stream<E>

Direct Known Subclasses:

FoldedStream, GuardedStream, MonitoredStream, PipedStream, ResultsetStream, UnfoldedStream

public abstract class LookAheadStream<E>
extends Object
implements Stream<E>

Partial Stream implementation based on look-ahead operations over an underlying stream.

The implementation attempts to prefetch the output of next() in hasNext(). If a failure occurs, hasNext():

keeps consuming the underlying stream as long as the failure is a StreamSkipSignal; consults a FaultHandler for all the other failures. If the FaultHandler re-throws the same or a different exception, the implementation throws it at the following next().

Author:

Fabio Simeoni