org.apache.mahout.common.iterator

Class SamplingIterator<T>

java.lang.Object

com.google.common.collect.UnmodifiableIterator<T>

com.google.common.collect.AbstractIterator<T>

org.apache.mahout.common.iterator.SamplingIterator<T>

All Implemented Interfaces:

Iterator<T>

public final class SamplingIterator<T>
extends com.google.common.collect.AbstractIterator<T>

Wraps an Iterator and returns only some subset of the elements that it would, as determined by a iterator rate parameter.

Constructor Summary

Constructors

Constructor and Description
SamplingIterator(Iterator<? extends T> delegate, double samplingRate)
SamplingIterator(RandomWrapper random, Iterator<? extends T> delegate, double samplingRate)

Method Summary

Modifier and Type	Method and Description
protected T	computeNext()

Methods inherited from class com.google.common.collect.AbstractIterator

endOfData, hasNext, next, peek

Methods inherited from class com.google.common.collect.UnmodifiableIterator

remove

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Detail

SamplingIterator

public SamplingIterator(Iterator<? extends T> delegate,
                        double samplingRate)

SamplingIterator

public SamplingIterator(RandomWrapper random,
                        Iterator<? extends T> delegate,
                        double samplingRate)

Method Detail

computeNext

protected T computeNext()

Specified by:

computeNext in class com.google.common.collect.AbstractIterator<T>