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, InspectionUtilFrequentlyScanned, Parameterizable

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

static class

StaticArrayDatabase.Parameterizer Parameterization class.

Field Summary

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	logger Our logger

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

eventManager, INDEX_ID, indexes, indexFactories, relations

Constructor Summary

StaticArrayDatabase()
Constructor with no indexes.

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

Method Summary

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.
StaticDBIDs	getDBIDs() Deprecated.
Collection<Index>	getIndexes() Collection of known indexes
protected Logging	getLogger()
void	initialize() Initialize the database by getting the initial data from the database connection.
void	removeIndex(Index index) Remove a particular index
int	size() Deprecated.

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

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

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.database.Database

accumulateDataStoreEvents, addDataStoreListener, flushDataStoreEvents, getBundle, getDistanceQuery, getKNNQuery, getRangeQuery, getRelation, getRelations, getRKNNQuery, getSimilarityQuery, removeDataStoreListener

Methods inherited from interface de.lmu.ifi.dbs.elki.result.HierarchicalResult

getHierarchy, setHierarchy

Methods inherited from interface de.lmu.ifi.dbs.elki.result.Result

getLongName, getShortName

Field Detail

logger

private static final Logging logger

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

getIndexes

public Collection<Index> getIndexes()

Description copied from interface: Database

Collection of known indexes

Specified by:

getIndexes in interface Database

Overrides:

getIndexes in class AbstractDatabase

removeIndex

public void removeIndex(Index index)

Description copied from interface: Database

Remove a particular index

Specified by:

removeIndex in interface Database

Overrides:

removeIndex in class AbstractDatabase

Parameters:

index - Index to remove

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

size

@Deprecated
public final int size()

Deprecated.

Description copied from interface: Database

Returns the number of objects contained in this Database.

Specified by:

size in interface Database

Returns:

the number of objects in this Database

getDBIDs

@Deprecated
public StaticDBIDs getDBIDs()

Deprecated.

Description copied from interface: Database

Returns a list comprising all IDs currently in use. The list returned shall not be linked to any actual list possibly hold in the database implementation.

Specified by:

getDBIDs in interface Database

Returns:

a list comprising all IDs currently in use

getLogger

protected Logging getLogger()

Specified by:

getLogger in class AbstractDatabase