org.gcube.data.streams.generators
Interface Generator<E1,E2>

Type Parameters:

E1 - the type of elements in the input stream

E2 - the type of elements in the output stream

All Known Implementing Classes:

Filter, LoggingListener, NoOpGenerator, Processor

public interface Generator<E1,E2>

Yields elements of a Stream from elements of another Stream.

Author:

Fabio Simeoni

See Also:

Stream

Field Summary

static Iteration

iteration The ongoing iteration.

Method Summary

E2	yield(E1 element) Yields an element of a Stream from an element of another Stream.

Field Detail

iteration

static final Iteration iteration

The ongoing iteration.

Method Detail

yield

E2 yield(E1 element)
         throws StreamSkipSignal,
                StreamStopSignal

Yields an element of a Stream from an element of another Stream.

Parameters:

element - the input element

Returns:

the output element

Throws:

StreamSkipSignal - if no element should be yielded from the input element (i.e. the element should not contribute to the output stream)

StreamStopSignal - if no further element should be yielded

RuntimeException - if no element can be yielded from the input element