net.myrrix.common.collection

Class SamplingLongPrimitiveIterator

java.lang.Object

org.apache.mahout.cf.taste.impl.common.AbstractLongPrimitiveIterator

net.myrrix.common.collection.SamplingLongPrimitiveIterator

All Implemented Interfaces:

Iterator<Long>, org.apache.mahout.cf.taste.impl.common.LongPrimitiveIterator, org.apache.mahout.cf.taste.impl.common.SkippingIterator<Long>

public final class SamplingLongPrimitiveIterator
extends org.apache.mahout.cf.taste.impl.common.AbstractLongPrimitiveIterator

Wraps a LongPrimitiveIterator and returns only some subset of the elements that it would, as determined by a sampling rate parameter. Adapted from the same class in Mahout 0.8.

Since:

1.0

Author:

Sean Owen, Mahout

Constructor Summary

Constructors

Constructor and Description
SamplingLongPrimitiveIterator(org.apache.mahout.cf.taste.impl.common.LongPrimitiveIterator delegate, double samplingRate)
SamplingLongPrimitiveIterator(org.apache.commons.math3.random.RandomGenerator random, org.apache.mahout.cf.taste.impl.common.LongPrimitiveIterator delegate, double samplingRate)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	hasNext()
static org.apache.mahout.cf.taste.impl.common.LongPrimitiveIterator	maybeWrapIterator(org.apache.mahout.cf.taste.impl.common.LongPrimitiveIterator delegate, double samplingRate)
long	nextLong()
long	peek()
void	remove()
void	skip(int n)

Methods inherited from class org.apache.mahout.cf.taste.impl.common.AbstractLongPrimitiveIterator

next

Methods inherited from class java.lang.Object

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

Constructor Detail

SamplingLongPrimitiveIterator

public SamplingLongPrimitiveIterator(org.apache.mahout.cf.taste.impl.common.LongPrimitiveIterator delegate,
                             double samplingRate)

SamplingLongPrimitiveIterator

public SamplingLongPrimitiveIterator(org.apache.commons.math3.random.RandomGenerator random,
                             org.apache.mahout.cf.taste.impl.common.LongPrimitiveIterator delegate,
                             double samplingRate)

Method Detail

hasNext

public boolean hasNext()

nextLong

public long nextLong()

peek

public long peek()

remove

public void remove()

Throws:

UnsupportedOperationException

skip

public void skip(int n)

maybeWrapIterator

public static org.apache.mahout.cf.taste.impl.common.LongPrimitiveIterator maybeWrapIterator(org.apache.mahout.cf.taste.impl.common.LongPrimitiveIterator delegate,
                                                                             double samplingRate)