cutthecrap.utils.striterators

Class Contractorator

java.lang.Object

cutthecrap.utils.striterators.Prefetch

cutthecrap.utils.striterators.Contractorator

All Implemented Interfaces:

Iterator

public class Contractorator
extends Prefetch

A Contractorator is the reverse of an Expanderator. A Contractorator takes a source Iterator, and consumes elements from it in batches by passing to the Contractor which returns an object when ready. It is upto the Contractor to handle termination conditions. For example, it might batch consume the objects ten at a time with some summary info, but handle that there may be less than ten elements in the final summary. A Contractor could also be used to chunk up a number of objects for serialization, perhaps for network transmission. Such a pattern might be used with an Expander on the other side to deserialize into an iterator.

Author:

Martyn Cutcher

Field Summary

Fields

Modifier and Type	Field and Description
protected Object	m_ctx

Constructor Summary

Constructors

Constructor and Description
Contractorator(Iterator src, Object ctx, Contractor contractor)

Method Summary

Methods

Modifier and Type	Method and Description
protected Object	getNext()
void	remove()

Methods inherited from class cutthecrap.utils.striterators.Prefetch

hasNext, next, ready

Methods inherited from class java.lang.Object

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

Field Detail

m_ctx

protected final Object m_ctx

Constructor Detail

Contractorator

public Contractorator(Iterator src,
              Object ctx,
              Contractor contractor)

Method Detail

getNext

protected Object getNext()

Specified by:

getNext in class Prefetch

remove

public void remove()