de.lmu.ifi.dbs.elki.database

Class StaticArrayDatabase

java.lang.Object

de.lmu.ifi.dbs.elki.result.AbstractHierarchicalResult

de.lmu.ifi.dbs.elki.database.AbstractDatabase

de.lmu.ifi.dbs.elki.database.StaticArrayDatabase

All Implemented Interfaces:

Database, HierarchicalResult, Result, Parameterizable

@Description(value="Database using an in-memory hashtable and at least providing linear scans.")
public class StaticArrayDatabase
extends AbstractDatabase
implements Parameterizable

This database class uses array-based storage and thus does not allow for dynamic insert, delete and update operations. However, array access is expected to be faster and use less memory.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	StaticArrayDatabase.Parameterizer Parameterization class.

Field Summary

Fields

Modifier and Type	Field and Description
protected DatabaseConnection	databaseConnection The data source we get the initial data from.
private DBIDView	idrep The DBID representation we use
private ArrayDBIDs	ids IDs of this database
private static Logging	LOG Our logger

Fields inherited from class de.lmu.ifi.dbs.elki.database.AbstractDatabase

eventManager, INDEX_ID, indexes, indexFactories, relations

Fields inherited from interface de.lmu.ifi.dbs.elki.database.Database

DATABASE_CONNECTION_ID

Constructor Summary

Constructors

Constructor and Description
StaticArrayDatabase() Constructor with no indexes.
StaticArrayDatabase(DatabaseConnection databaseConnection, Collection<IndexFactory<?,?>> indexFactories) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	addIndex(Index index) Add a new index to the database.
private Relation<?>	addNewRelation(SimpleTypeInformation<?> meta) Add a new representation for the given meta.
protected Relation<?>[]	alignColumns(ObjectBundle pack) Find a mapping from package columns to database columns, eventually adding new database columns when needed.
protected int	findDBIDColumn(ObjectBundle pack) Find an DBID column.
protected Logging	getLogger()
void	initialize() Initialize the database by getting the initial data from the database connection.

Methods inherited from class de.lmu.ifi.dbs.elki.database.AbstractDatabase

accumulateDataStoreEvents, addDataStoreListener, flushDataStoreEvents, getBundle, getDistanceQuery, getIndexes, getKNNQuery, getLongName, getRangeQuery, getRelation, getRelations, getRKNNQuery, getShortName, getSimilarityQuery, removeDataStoreListener, removeIndex

Methods inherited from class de.lmu.ifi.dbs.elki.result.AbstractHierarchicalResult

addChildResult, getHierarchy, setHierarchy

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.result.HierarchicalResult

getHierarchy, setHierarchy

Field Detail

LOG

private static final Logging LOG

Our logger

ids

private ArrayDBIDs ids

IDs of this database

idrep

private DBIDView idrep

The DBID representation we use

databaseConnection

protected DatabaseConnection databaseConnection

The data source we get the initial data from.

Constructor Detail

StaticArrayDatabase

public StaticArrayDatabase(DatabaseConnection databaseConnection,
                   Collection<IndexFactory<?,?>> indexFactories)

Constructor.

Parameters:

databaseConnection - Database connection to get the initial data from.

indexFactories - Indexes to add

StaticArrayDatabase

public StaticArrayDatabase()

Constructor with no indexes.

Method Detail

initialize

public void initialize()

Initialize the database by getting the initial data from the database connection.

Specified by:

initialize in interface Database

addIndex

public void addIndex(Index index)

Description copied from interface: Database

Add a new index to the database.

Specified by:

addIndex in interface Database

Overrides:

addIndex in class AbstractDatabase

Parameters:

index - Index to add

findDBIDColumn

protected int findDBIDColumn(ObjectBundle pack)

Find an DBID column.

Parameters:

pack - Package to process

Returns:

DBID column

alignColumns

protected Relation<?>[] alignColumns(ObjectBundle pack)

Find a mapping from package columns to database columns, eventually adding new database columns when needed.

Parameters:

pack - Package to process

Returns:

Column mapping

addNewRelation

private Relation<?> addNewRelation(SimpleTypeInformation<?> meta)

Add a new representation for the given meta.

Parameters:

meta - meta data

Returns:

new representation

getLogger

protected Logging getLogger()

Specified by:

getLogger in class AbstractDatabase