weka.experiment
Interface InstanceQueryAdapter

All Known Implementing Classes:

InstanceQuery

public interface InstanceQueryAdapter

An interface implemented by InstanceQuery and any user class that is to be passed as the first argument to InstanceQuery.retrieveInstances(InstanceQueryAdapter, ResultSet).

Version:

$Revision: 8034 $

Author:

Wes Munsil (wes_munsil@cytoanalytics.com)

Method Summary

String	attributeCaseFix(String columnName) returns key column headings in their original case.
boolean	getDebug() Gets whether there should be printed some debugging output to stderr or not.
boolean	getSparseData() Gets whether data is to be returned as a set of sparse instances
int	translateDBColumnType(String type) translates the column data type string to an integer value that indicates which data type / get()-Method to use in order to retrieve values from the database (see DatabaseUtils.Properties, InstanceQuery()).

Method Detail

attributeCaseFix

String attributeCaseFix(String columnName)

returns key column headings in their original case. Used for those databases that create uppercase column names.

Parameters:

columnName - the column to retrieve the original case for

Returns:

the original case

getDebug

boolean getDebug()

Gets whether there should be printed some debugging output to stderr or not.

Returns:

true if output should be printed

getSparseData

boolean getSparseData()

Gets whether data is to be returned as a set of sparse instances

Returns:

true if data is to be encoded as sparse instances

translateDBColumnType

int translateDBColumnType(String type)

translates the column data type string to an integer value that indicates which data type / get()-Method to use in order to retrieve values from the database (see DatabaseUtils.Properties, InstanceQuery()). Blanks in the type are replaced with underscores "_", since Java property names can't contain blanks.

Parameters:

type - the column type as retrieved with java.sql.MetaData.getColumnTypeName(int)

Returns:

an integer value that indicates which data type / get()-Method to use in order to retrieve values from the