com.sun.labs.minion.classification
Class RandomTwoThirdsSplitter

java.lang.Object
  com.sun.labs.minion.classification.RandomTwoThirdsSplitter

All Implemented Interfaces:

ResultSplitter

public class RandomTwoThirdsSplitter
extends java.lang.Object
implements ResultSplitter

Provides two thirds/one third splits of a result set by selecting documents at random to place in either set.

Nested Class Summary

class

RandomTwoThirdsSplitter.Doc

Field Summary

protected RandomTwoThirdsSplitter.Doc[]	allDocs
protected int	numArrayGroups The number of array groups in the result set
protected int	numSplits The number of times to split
protected ResultSetImpl	parent The full results, as passed in
protected ResultSetImpl	train The set that should be trained on
protected ResultSetImpl	validate The set that should be used for validation

Constructor Summary

RandomTwoThirdsSplitter()
Default constructor.

Method Summary

int	getMinDocs() Gets the minimum number of docs needed for this splitter to be useful.
ResultSetImpl	getTrainSet() Gets the first of the two subset
ResultSetImpl	getValidateSet() Gets the second of the two subsets
void	init(ResultSetImpl parent, IndexConfig iC) Initializes the class.
boolean	nextSplit() Advances to the next split, if there is one.

Methods inherited from class java.lang.Object

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

Field Detail

numSplits

protected int numSplits

The number of times to split

train

protected ResultSetImpl train

The set that should be trained on

validate

protected ResultSetImpl validate

The set that should be used for validation

parent

protected ResultSetImpl parent

The full results, as passed in

numArrayGroups

protected int numArrayGroups

The number of array groups in the result set

allDocs

protected RandomTwoThirdsSplitter.Doc[] allDocs

Constructor Detail

RandomTwoThirdsSplitter

public RandomTwoThirdsSplitter()

Default constructor. Setup is performed in the init method.

Method Detail

init

public void init(ResultSetImpl parent,
                 IndexConfig iC)

Description copied from interface: ResultSplitter

Initializes the class. Since implementors of ResultSplitter will be created via reflection, the default constructor is used. After instantiation, this init method is called.

Specified by:

init in interface ResultSplitter

Parameters:

parent - the result set to split up

iC - the index config, possibly containing relevent settings for this splitter

getMinDocs

public int getMinDocs()

Gets the minimum number of docs needed for this splitter to be useful.

Specified by:

getMinDocs in interface ResultSplitter

Returns:

the number 3

getTrainSet

public ResultSetImpl getTrainSet()

Gets the first of the two subset

Specified by:

getTrainSet in interface ResultSplitter

Returns:

a result set that is a subset of the one passed in

getValidateSet

public ResultSetImpl getValidateSet()

Gets the second of the two subsets

Specified by:

getValidateSet in interface ResultSplitter

Returns:

a result set that is a subset of the one passed in

nextSplit

public boolean nextSplit()

Advances to the next split, if there is one. getFirstSet() and getSecondSet() will return the new splits after this method is called

Specified by:

nextSplit in interface ResultSplitter

Returns:

true if there is another split available