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kddml.Operators.IO.ExternalResourceReader.ARFF_LOADER_RESOLVER Class Reference

Inheritance diagram for kddml.Operators.IO.ExternalResourceReader.ARFF_LOADER_RESOLVER:

kddml.Operators.IO.ExternalResourceReader.ExternalResourceReaderResolver kddml.Operators.IO.IOResolver kddml.Operators.OperatorResolver kddml.Operators.HWResourcesDescription List of all members.

Public Member Functions

boolean highDiskAccessIsNeeded ()

Protected Member Functions

KDDMLObject importObject (Hashtable< String, KDDMLScalarManager > settings) throws ResolverException, KDDMLCoreException

Detailed Description

ARFF (Attribute-Relation File Format) file is a text file that consists of a list of instances with the attribute value for each instance being separated by commas. The operator loads an ARFF source gathered via local file system or via ftp, http protocols and returns an InternalTable as output. Mapping from ARFF types to the logical types of the output table is automatic.

Title: KDDML

Description: Knowledge Discovery in Database Environment

Copyright: Copyright (c) 2003-2005

Company: Universita' di Pisa - Dipartimento di Informatica

Author:
Andrea Romei (romei@di.unipi.it)
Version:
2.0.16


Member Function Documentation

KDDMLObject kddml.Operators.IO.ExternalResourceReader.ARFF_LOADER_RESOLVER.importObject Hashtable< String, KDDMLScalarManager settings  )  throws ResolverException, KDDMLCoreException [protected, virtual]
 

Reads the external resource by means the input attributes and returns a KDDMLObject as output.
Attributes are given as hashtable, where the key is the name of the XML attribute related to the operator and the value is a KDDMLScalar object containing the attribute value. Attribute value is checked by interpreter layer and it is correct.

Parameters:
settings Hashtable the attributes related to the operator. The key of the hashtable is the name of the attribute. The value of the hashtable is a KDDMLScalar representing the value of the attribute.
Returns:
KDDMLObject the result of evaluating the operator.
Exceptions:
ResolverException if a resolving error occurs.
KDDMLCoreException if a level core error occurs.

Implements kddml.Operators.IO.ExternalResourceReader.ExternalResourceReaderResolver.

boolean kddml.Operators.IO.ExternalResourceReader.ARFF_LOADER_RESOLVER.highDiskAccessIsNeeded  ) 
 

Returns true if the operator performes a high number of I/O operation to the hard disk.

Returns:
boolean

Reimplemented from kddml.Operators.OperatorResolver.


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