org.apache.crunch.util

Class DoFnIterator<S,T>

java.lang.Object

org.apache.crunch.util.DoFnIterator<S,T>

Type Parameters:

S - The type of the delegate iterator

T - The returned type

All Implemented Interfaces:

Iterator<T>

public class DoFnIterator<S,T>
extends Object
implements Iterator<T>

An Iterator<T> that combines a delegate Iterator<S> and a DoFn<S, T>, generating data by passing the contents of the iterator through the function. Note that the input DoFn should have both its setContext and initialize functions called before it is passed to the constructor.

Constructor Summary

Constructors

Constructor and Description
DoFnIterator(Iterator<S> iter, DoFn<S,T> fn)

Method Summary

Methods

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

Methods inherited from class java.lang.Object

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

Constructor Detail

DoFnIterator

public DoFnIterator(Iterator<S> iter,
            DoFn<S,T> fn)

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<T>

next

public T next()

Specified by:

next in interface Iterator<T>

remove

public void remove()

Specified by:

remove in interface Iterator<T>