de.lmu.ifi.dbs.elki.datasource

Class AbstractDatabaseConnection

java.lang.Object

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

All Implemented Interfaces:

DatabaseConnection

Direct Known Subclasses:

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

public abstract class AbstractDatabaseConnection
extends java.lang.Object
implements 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 and Description
static class	AbstractDatabaseConnection.Parameterizer Parameterization class.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.List<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 and Description
protected	AbstractDatabaseConnection(java.util.List<ObjectFilter> filters) Constructor.

Method Summary

Modifier and Type	Method and Description
protected abstract Logging	getLogger() Get the logger for this database connection.
protected MultipleObjectsBundle	invokeBundleFilters(MultipleObjectsBundle bundle) Transforms the specified list of objects and their labels into a list of objects and their associations.
protected BundleStreamSource	invokeStreamFilters(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 de.lmu.ifi.dbs.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<ObjectFilter> filters

The filters to invoke

Constructor Detail

AbstractDatabaseConnection

protected AbstractDatabaseConnection(java.util.List<ObjectFilter> filters)

Constructor.

Parameters:

filters - Filters to apply, can be null

Method Detail

invokeBundleFilters

protected MultipleObjectsBundle invokeBundleFilters(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 BundleStreamSource invokeStreamFilters(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 Logging getLogger()

Get the logger for this database connection.

Returns:

Logger