weka.core.converters

Class SerializedInstancesLoader

java.lang.Object

weka.core.converters.AbstractLoader

weka.core.converters.AbstractFileLoader

weka.core.converters.SerializedInstancesLoader

All Implemented Interfaces:

java.io.Serializable, BatchConverter, FileSourcedConverter, IncrementalConverter, Loader, EnvironmentHandler, RevisionHandler

public class SerializedInstancesLoader
extends AbstractFileLoader
implements BatchConverter, IncrementalConverter

Reads a source that contains serialized Instances.

Version:

$Revision: 8034 $

Author:

Len Trigg

See Also:

Loader, Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface weka.core.converters.Loader

Loader.StructureNotReadyException

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	FILE_EXTENSION the file extension

Fields inherited from class weka.core.converters.AbstractFileLoader

FILE_EXTENSION_COMPRESSED

Fields inherited from interface weka.core.converters.Loader

BATCH, INCREMENTAL, NONE

Constructor Summary

Constructors

Constructor and Description
SerializedInstancesLoader()

Method Summary

Modifier and Type	Method and Description
Instances	getDataSet() Return the full data set.
java.lang.String	getFileDescription() Returns a description of the file type.
java.lang.String	getFileExtension() Get the file extension used for arff files
java.lang.String[]	getFileExtensions() Gets all the file extensions used for this type of file
Instance	getNextInstance(Instances structure) Read the data set incrementally---get the next instance in the data set or returns null if there are no more instances to get.
java.lang.String	getRevision() Returns the revision string.
Instances	getStructure() Determines and returns (if possible) the structure (internally the header) of the data set as an empty set of instances.
java.lang.String	globalInfo() Returns a string describing this object
static void	main(java.lang.String[] args) Main method.
void	reset() Resets the Loader ready to read a new data set
void	setSource(java.io.InputStream in) Resets the Loader object and sets the source of the data set to be the supplied InputStream.

Methods inherited from class weka.core.converters.AbstractFileLoader

getUseRelativePath, retrieveFile, runFileLoader, setEnvironment, setFile, setSource, setUseRelativePath, useRelativePathTipText

Methods inherited from class weka.core.converters.AbstractLoader

setRetrieval

Methods inherited from class java.lang.Object

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

Field Detail

FILE_EXTENSION

public static java.lang.String FILE_EXTENSION

the file extension

Constructor Detail

SerializedInstancesLoader

public SerializedInstancesLoader()

Method Detail

globalInfo

public java.lang.String globalInfo()

Returns a string describing this object

Returns:

a description of the classifier suitable for displaying in the explorer/experimenter gui

reset

public void reset()

Resets the Loader ready to read a new data set

Specified by:

reset in interface Loader

Overrides:

reset in class AbstractFileLoader

getFileExtension

public java.lang.String getFileExtension()

Get the file extension used for arff files

Specified by:

getFileExtension in interface FileSourcedConverter

Returns:

the file extension

getFileExtensions

public java.lang.String[] getFileExtensions()

Gets all the file extensions used for this type of file

Specified by:

getFileExtensions in interface FileSourcedConverter

Returns:

the file extensions

getFileDescription

public java.lang.String getFileDescription()

Returns a description of the file type.

Specified by:

getFileDescription in interface FileSourcedConverter

Returns:

a short file description

setSource

public void setSource(java.io.InputStream in)
               throws java.io.IOException

Resets the Loader object and sets the source of the data set to be the supplied InputStream.

Specified by:

setSource in interface Loader

Overrides:

setSource in class AbstractLoader

Parameters:

in - the source InputStream.

Throws:

java.io.IOException - if there is a problem with IO

getStructure

public Instances getStructure()
                       throws java.io.IOException

Determines and returns (if possible) the structure (internally the header) of the data set as an empty set of instances.

Specified by:

getStructure in interface Loader

Specified by:

getStructure in class AbstractLoader

Returns:

the structure of the data set as an empty set of Instances

Throws:

java.io.IOException - if an error occurs

getDataSet

public Instances getDataSet()
                     throws java.io.IOException

Return the full data set. If the structure hasn't yet been determined by a call to getStructure then method should do so before processing the rest of the data set.

Specified by:

getDataSet in interface Loader

Specified by:

getDataSet in class AbstractLoader

Returns:

the structure of the data set as an empty set of Instances

Throws:

java.io.IOException - if there is no source or parsing fails

getNextInstance

public Instance getNextInstance(Instances structure)
                         throws java.io.IOException

Read the data set incrementally---get the next instance in the data set or returns null if there are no more instances to get. If the structure hasn't yet been determined by a call to getStructure then method should do so before returning the next instance in the data set.

Specified by:

getNextInstance in interface Loader

Specified by:

getNextInstance in class AbstractLoader

Parameters:

structure - ignored

Returns:

the next instance in the data set as an Instance object or null if there are no more instances to be read

Throws:

java.io.IOException - if there is an error during parsing

getRevision

public java.lang.String getRevision()

Returns the revision string.

Specified by:

getRevision in interface RevisionHandler

Returns:

the revision

main

public static void main(java.lang.String[] args)

Main method.

Parameters:

args - should contain the name of an input file.