Package elki.datasource

Class AbstractDatabaseConnection

java.lang.Object

elki.datasource.AbstractDatabaseConnection

All Implemented Interfaces:

elki.datasource.DatabaseConnection

Direct Known Subclasses:

ArrayAdapterDatabaseConnection, BundleDatabaseConnection, ConcatenateFilesDatabaseConnection, EmptyDatabaseConnection, ExternalIDJoinDatabaseConnection, InputStreamDatabaseConnection, LabelJoinDatabaseConnection, PresortedBlindJoinDatabaseConnection, RandomDoubleVectorDatabaseConnection

public abstract class AbstractDatabaseConnection
extends java.lang.Object
implements elki.datasource.DatabaseConnection

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

Since:

0.1

Author:

Elke Achtert

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	AbstractDatabaseConnection.Par	Parameterization class.

Field Summary

Fields

Modifier and Type	Field	Description
protected java.util.List<? extends elki.datasource.filter.ObjectFilter>	filters	The filters to invoke
static java.lang.String	LABEL_CONCATENATION	A sign to separate components of a label.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractDatabaseConnection(java.util.List<? extends elki.datasource.filter.ObjectFilter> filters)	Constructor.

Method Summary

Modifier and Type	Method	Description
protected abstract elki.logging.Logging	getLogger()	Get the logger for this database connection.
protected elki.datasource.bundle.MultipleObjectsBundle	invokeBundleFilters(elki.datasource.bundle.MultipleObjectsBundle bundle)	Transforms the specified list of objects and their labels into a list of objects and their associations.
protected elki.datasource.bundle.BundleStreamSource	invokeStreamFilters(elki.datasource.bundle.BundleStreamSource stream)	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 elki.datasource.DatabaseConnection

loadData

Field Detail

LABEL_CONCATENATION

public static final java.lang.String LABEL_CONCATENATION

A sign to separate components of a label.

See Also:

Constant Field Values

filters

protected java.util.List<? extends elki.datasource.filter.ObjectFilter> filters

The filters to invoke

Constructor Detail

AbstractDatabaseConnection

protected AbstractDatabaseConnection(java.util.List<? extends elki.datasource.filter.ObjectFilter> filters)

Constructor.

Parameters:

filters - Filters to apply, can be null

Method Detail

invokeBundleFilters

protected elki.datasource.bundle.MultipleObjectsBundle invokeBundleFilters(elki.datasource.bundle.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

invokeStreamFilters

protected elki.datasource.bundle.BundleStreamSource invokeStreamFilters(elki.datasource.bundle.BundleStreamSource stream)

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

Parameters:

stream - the objects to process

Returns:

processed objects

getLogger

protected abstract elki.logging.Logging getLogger()

Get the logger for this database connection.

Returns:

Logger