de.lmu.ifi.dbs.elki.datasource
Class AbstractDatabaseConnection

java.lang.Object
  de.lmu.ifi.dbs.elki.datasource.AbstractDatabaseConnection

All Implemented Interfaces:

DatabaseConnection, InspectionUtilFrequentlyScanned, Parameterizable

Direct Known Subclasses:

EmptyDatabaseConnection, ExternalIDJoinDatabaseConnection, InputStreamDatabaseConnection, LabelJoinDatabaseConnection, RandomDoubleVectorDatabaseConnection

public abstract class AbstractDatabaseConnection
extends Object
implements DatabaseConnection

Abstract super class for all database connections. AbstractDatabaseConnection already provides the setting of the database according to parameters.

Nested Class Summary

static class

AbstractDatabaseConnection.Parameterizer Parameterization class.

Field Summary

protected List<ObjectFilter>	filters The filters to invoke
static OptionID	FILTERS_ID Filters to apply to the input data.
static String	LABEL_CONCATENATION A sign to separate components of a label.

Constructor Summary

protected

AbstractDatabaseConnection(List<ObjectFilter> filters) Constructor.

Method Summary

protected abstract Logging	getLogger() Get the logger for this database connection.
protected MultipleObjectsBundle	invokeFilters(MultipleObjectsBundle bundle) Transforms the specified list of objects and their labels into a list of objects and their associations.

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.lmu.ifi.dbs.elki.datasource.DatabaseConnection

loadData

Field Detail

LABEL_CONCATENATION

public static final String LABEL_CONCATENATION

A sign to separate components of a label.

See Also:

Constant Field Values

FILTERS_ID

public static final OptionID FILTERS_ID

Filters to apply to the input data.

Key: -dbc.filter

filters

protected List<ObjectFilter> filters

The filters to invoke

Constructor Detail

AbstractDatabaseConnection

protected AbstractDatabaseConnection(List<ObjectFilter> filters)

Constructor.

Parameters:

filters - Filters to apply, can be null

Method Detail

invokeFilters

protected MultipleObjectsBundle invokeFilters(MultipleObjectsBundle bundle)

Transforms the specified list of objects and their labels into a list of objects and their associations.

Parameters:

bundle - the objects to process

Returns:

processed objects

getLogger

protected abstract Logging getLogger()

Get the logger for this database connection.

Returns:

Logger