moa.streams.clustering

Class FileStream

java.lang.Object

moa.AbstractMOAObject

moa.options.AbstractOptionHandler

moa.streams.clustering.ClusteringStream

moa.streams.clustering.FileStream

All Implemented Interfaces:

Serializable, MOAObject, OptionHandler, InstanceStream

public class FileStream
extends ClusteringStream

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
FileOption	arffFileOption
IntOption	classIndexOption
protected InputStreamProgressMonitor	fileProgressMonitor
protected Reader	fileReader
protected boolean	hitEndOfFile
protected weka.core.Instances	instances
FlagOption	keepNonNumericalAttrOption
protected weka.core.Instance	lastInstanceRead
FlagOption	normalizeOption
protected int	numInstancesRead
ListOption	removeAttributesOption

Fields inherited from class moa.streams.clustering.ClusteringStream

decayHorizonOption, decayThresholdOption, evaluationFrequencyOption, numAttsOption

Fields inherited from class moa.options.AbstractOptionHandler

classOptionNamesToPreparedObjects, options

Constructor Summary

Constructors

Constructor and Description
FileStream()

Method Summary

Methods

Modifier and Type	Method and Description
long	estimatedRemainingInstances() Gets the estimated number of remaining instances in this stream
void	getDescription(StringBuilder sb, int indent) Returns a string representation of this object.
InstancesHeader	getHeader() Gets the header of this stream.
String	getPurposeString() Gets the purpose of this object
boolean	hasMoreInstances() Gets whether this stream has more instances to output.
boolean	isRestartable() Gets whether this stream can restart.
weka.core.Instance	nextInstance() Gets the next instance from this stream.
void	prepareForUseImpl(TaskMonitor monitor, ObjectRepository repository) This method describes the implementation of how to prepare this object for use.
protected ArrayList<Double[]>	readMinMaxDiffValues(HashSet<Integer> ignoredAttributes)
protected boolean	readNextInstanceFromFile()
void	restart() Restarts this stream.

Methods inherited from class moa.streams.clustering.ClusteringStream

getDecayHorizon, getDecayThreshold, getEvaluationFrequency

Methods inherited from class moa.options.AbstractOptionHandler

copy, discoverOptionsViaReflection, getCLICreationString, getOptions, getPreparedClassOption, getPreparedClassOption, prepareClassOptions, prepareForUse, prepareForUse

Methods inherited from class moa.AbstractMOAObject

copy, measureByteSize, measureByteSize, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface moa.MOAObject

copy, measureByteSize

Field Detail

arffFileOption

public FileOption arffFileOption

classIndexOption

public IntOption classIndexOption

normalizeOption

public FlagOption normalizeOption

removeAttributesOption

public ListOption removeAttributesOption

keepNonNumericalAttrOption

public FlagOption keepNonNumericalAttrOption

instances

protected weka.core.Instances instances

fileReader

protected Reader fileReader

hitEndOfFile

protected boolean hitEndOfFile

lastInstanceRead

protected weka.core.Instance lastInstanceRead

numInstancesRead

protected int numInstancesRead

fileProgressMonitor

protected InputStreamProgressMonitor fileProgressMonitor

Constructor Detail

FileStream

public FileStream()

Method Detail

getPurposeString

public String getPurposeString()

Description copied from interface: OptionHandler

Gets the purpose of this object

Specified by:

getPurposeString in interface OptionHandler

Overrides:

getPurposeString in class AbstractOptionHandler

Returns:

the string with the purpose of this object

prepareForUseImpl

public void prepareForUseImpl(TaskMonitor monitor,
                     ObjectRepository repository)

Description copied from class: AbstractOptionHandler

This method describes the implementation of how to prepare this object for use. All classes that extends this class have to implement prepareForUseImpl and not prepareForUse since prepareForUse calls prepareForUseImpl.

Specified by:

prepareForUseImpl in class AbstractOptionHandler

Parameters:

monitor - the TaskMonitor to use

repository - the ObjectRepository to use

getHeader

public InstancesHeader getHeader()

Description copied from interface: InstanceStream

Gets the header of this stream. This is useful to know attributes and classes. InstancesHeader is an extension of weka.Instances.

Returns:

the header of this stream

estimatedRemainingInstances

public long estimatedRemainingInstances()

Description copied from interface: InstanceStream

Gets the estimated number of remaining instances in this stream

Returns:

the estimated number of instances to get from this stream

hasMoreInstances

public boolean hasMoreInstances()

Description copied from interface: InstanceStream

Gets whether this stream has more instances to output. This is useful when reading streams from files.

Returns:

true if this stream has more instances to output

nextInstance

public weka.core.Instance nextInstance()

Description copied from interface: InstanceStream

Gets the next instance from this stream.

Returns:

the next instance of this stream

isRestartable

public boolean isRestartable()

Description copied from interface: InstanceStream

Gets whether this stream can restart.

Returns:

true if this stream can restart

restart

public void restart()

Description copied from interface: InstanceStream

Restarts this stream. It must be similar to starting a new stream from scratch.

readNextInstanceFromFile

protected boolean readNextInstanceFromFile()

readMinMaxDiffValues

protected ArrayList<Double[]> readMinMaxDiffValues(HashSet<Integer> ignoredAttributes)

Parameters:

ignoredAttributes - Attributes that will be ignored

Returns:

A list with min/max and diff=max-min values per attribute of the arff file

getDescription

public void getDescription(StringBuilder sb,
                  int indent)

Description copied from interface: MOAObject

Returns a string representation of this object. Used in AbstractMOAObject.toString to give a string representation of the object.

Parameters:

sb - the stringbuilder to add the description

indent - the number of characters to indent