Package net.vleo.timel.iterator

Class SplitAdapterTimeIterator<S,D>

java.lang.Object

net.vleo.timel.iterator.SplitAdapterTimeIterator<S,D>

Type Parameters:

S - Source value Java type

D - Target value Java type

All Implemented Interfaces:

TimeIterator<D>

public abstract class SplitAdapterTimeIterator<S,D>
extends Object
implements TimeIterator<D>

A TimeIterator that will adapt values from a source intermediate S to a destination intermediate D, using the adapt function possibly being able to split an input sample into an arbitrary number of out samples (including zero).

The adapt function is called once per sample and its result is cached to serve multiple next or peekNext calls.

Author:

Andrea Leofreddi

Constructor Summary

Constructors

Constructor	Description
SplitAdapterTimeIterator(TimeIterator<S> delegate)	Build a new adapter around the given delegate.

Method Summary

Modifier and Type	Method	Description
protected abstract List<Sample<D>>	adapt(Sample<S> sample)	Perform the adaptation.
boolean	hasNext()	Test if there is a next element.
Sample<D>	next()	Move forward the iterator and return the next value.
Sample<D>	peekNext()	Peek the next element without moving forward the iterator.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

SplitAdapterTimeIterator

public SplitAdapterTimeIterator(TimeIterator<S> delegate)

Build a new adapter around the given delegate.

Parameters:

delegate - Source iterator

Method Detail

adapt

protected abstract List<Sample<D>> adapt(Sample<S> sample)

Perform the adaptation.

Parameters:

sample - Sample to adapt

Returns:

A list of adapted samples. When null means that we've reached the end of stream.

next

public final Sample<D> next()
                     throws NoSuchElementException

Description copied from interface: TimeIterator

Move forward the iterator and return the next value.

Specified by:

next in interface TimeIterator<S>

Returns:

The next sample

Throws:

NoSuchElementException - If there is no next element

peekNext

public final Sample<D> peekNext()
                         throws NoSuchElementException

Description copied from interface: TimeIterator

Peek the next element without moving forward the iterator.

Specified by:

peekNext in interface TimeIterator<S>

Returns:

The next sample

Throws:

NoSuchElementException - If there is no next element

hasNext

public final boolean hasNext()

Description copied from interface: TimeIterator

Test if there is a next element.

Specified by:

hasNext in interface TimeIterator<S>

Returns:

True iff there is a next element

toString

public String toString()

Overrides:

toString in class Object