Package moa.streams.clustering

Class SimpleCSVStream

java.lang.Object

moa.AbstractMOAObject

moa.options.AbstractOptionHandler

moa.streams.clustering.ClusteringStream

moa.streams.clustering.SimpleCSVStream

All Implemented Interfaces:

Configurable, java.io.Serializable, CapabilitiesHandler, MOAObject, OptionHandler, ExampleStream<Example<Instance>>, InstanceStream

public class SimpleCSVStream
extends ClusteringStream

Provides a simple input stream for csv files. Adds if necessary a class attribute with an identical default value.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
FlagOption	classIndexOption
FileOption	csvFileOption
protected Instances	dataset
protected InputStreamProgressMonitor	fileProgressMonitor
protected java.io.BufferedReader	fileReader
protected boolean	hitEndOfFile
protected InstanceExample	lastInstanceRead
protected int	numAttributes
protected int	numInstancesRead
protected int	numTokens
StringOption	splitCharOption

Fields inherited from class moa.options.AbstractOptionHandler

config

Fields inherited from class moa.streams.clustering.ClusteringStream

decayHorizonOption, decayThresholdOption, evaluationFrequencyOption, numAttsOption

Constructor Summary

Constructors

Constructor	Description
SimpleCSVStream()	Creates a simple ClusteringStream for csv files.

Method Summary

Modifier and Type	Method	Description
long	estimatedRemainingInstances()	Gets the estimated number of remaining instances in this stream
void	getDescription(java.lang.StringBuilder sb, int indent)	Returns a string representation of this object.
InstancesHeader	getHeader()	Gets the header of this stream.
java.lang.String	getPurposeString()	Dictionary with option texts and objects
boolean	hasMoreInstances()	Gets whether this stream has more instances to output.
boolean	isRestartable()	Gets whether this stream can restart.
InstanceExample	nextInstance()	Gets the next example from this stream.
void	prepareForUseImpl(TaskMonitor monitor, ObjectRepository repository)	This method describes the implementation of how to prepare this object for use.
void	restart()	Restarts this stream.

Methods inherited from class moa.AbstractMOAObject

copy, measureByteSize, measureByteSize, toString

Methods inherited from class moa.options.AbstractOptionHandler

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

Methods inherited from interface moa.capabilities.CapabilitiesHandler

getCapabilities

Methods inherited from class moa.streams.clustering.ClusteringStream

getDecayHorizon, getDecayThreshold, getEvaluationFrequency

Methods inherited from interface moa.streams.ExampleStream

defineImmutableCapabilities

Methods inherited from interface moa.MOAObject

copy, measureByteSize

Methods inherited from class java.lang.Object

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

Field Detail

csvFileOption

public FileOption csvFileOption

splitCharOption

public StringOption splitCharOption

classIndexOption

public FlagOption classIndexOption

dataset

protected Instances dataset

fileReader

protected java.io.BufferedReader fileReader

hitEndOfFile

protected boolean hitEndOfFile

lastInstanceRead

protected InstanceExample lastInstanceRead

numInstancesRead

protected int numInstancesRead

numTokens

protected int numTokens

numAttributes

protected int numAttributes

fileProgressMonitor

protected InputStreamProgressMonitor fileProgressMonitor

Constructor Detail

SimpleCSVStream

public SimpleCSVStream()

Creates a simple ClusteringStream for csv files. Adds if necessary a class attribute with an identical default value.

Method Detail

getPurposeString

public java.lang.String getPurposeString()

Description copied from class: AbstractOptionHandler

Dictionary with option texts and objects

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: ExampleStream

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: ExampleStream

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: ExampleStream

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 InstanceExample nextInstance()

Description copied from interface: ExampleStream

Gets the next example from this stream.

Returns:

the next example of this stream

isRestartable

public boolean isRestartable()

Description copied from interface: ExampleStream

Gets whether this stream can restart.

Returns:

true if this stream can restart

restart

public void restart()

Description copied from interface: ExampleStream

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

getDescription

public void getDescription(java.lang.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