weka.core.converters
Class TreeLoader

java.lang.Object
  weka.core.converters.AbstractLoader
      weka.core.converters.TreeLoader

All Implemented Interfaces:

Loader, java.io.Serializable

public abstract class TreeLoader

extends AbstractLoader

Abstract TreeLoader should be extended by Loaders for tree-formatted data.

Version:

Author:

Arthur Zimek

See Also:

Serialized Form

Field Summary

Fields inherited from class weka.core.converters.AbstractLoader

BATCH, INCREMENTAL, m_retrieval, NONE

Constructor Summary

TreeLoader()

Method Summary

abstract Instances	getDataSet() Return the full data set.
abstract Instance	getNextInstance() Read the data set incrementally---get the next instance in the data set or returns null if there are no more instances to get.
abstract Instances	getStructure() Determines and returns (if possible) the structure (internally the header) of the data set as an empty set of instances.

Methods inherited from class weka.core.converters.AbstractLoader

getRetrieval, setRetrieval, setSource, setSource

Methods inherited from class java.lang.Object

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

Constructor Detail

TreeLoader

public TreeLoader()

Method Detail

getStructure

public abstract Instances getStructure()
                                throws java.io.IOException

Description copied from interface: Loader

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

Throws:

java.io.IOException

See Also:

Loader.getStructure()

getDataSet

public abstract Instances getDataSet()
                              throws java.io.IOException

Description copied from interface: Loader

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

Specified by:

getDataSet in interface Loader

Specified by:

getDataSet in class AbstractLoader

Throws:

java.io.IOException

See Also:

Loader.getDataSet()

getNextInstance

public abstract Instance getNextInstance()
                                  throws java.io.IOException

Description copied from interface: Loader

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. If it is not possible to read the data set incrementally (ie. in cases where the data set structure cannot be fully established before all instances have been seen) then an exception should be thrown.

Specified by:

getNextInstance in interface Loader

Specified by:

getNextInstance in class AbstractLoader

Throws:

java.io.IOException

See Also:

Loader.getNextInstance()