de.lmu.ifi.dbs.elki.database.datastore.memory

Class MapStore<T>

java.lang.Object

de.lmu.ifi.dbs.elki.database.datastore.memory.MapStore<T>

Type Parameters:

T - Representation object type

All Implemented Interfaces:

DataStore<T>, WritableDataStore<T>

class MapStore<T>
extends java.lang.Object
implements WritableDataStore<T>

A class to answer representation queries using a map. Basically, it is just a wrapper around a regular map. Rather than using this directly, use a WritableDataStore from the DataStoreFactory.

Since:

0.4.0

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.Map<DBID,T>	data Storage Map.

Constructor Summary

Constructors

Constructor and Description
MapStore() Constructor.
MapStore(java.util.Map<DBID,T> data) Constructor.

Method Summary

Modifier and Type	Method and Description
void	clear() Clear the storage (resetting it to the default value).
void	delete(DBIDRef id) Delete the contents for a particular ID and notifies the registered listeners.
void	destroy() Deallocate the storage, freeing the memory and notifies the registered listeners.
T	get(DBIDRef id) Retrieves an object from the storage.
T	put(DBIDRef id, T value) Associates the specified value with the specified id in this storage.

Methods inherited from class java.lang.Object

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

Field Detail

data

private java.util.Map<DBID,T> data

Storage Map.

Constructor Detail

MapStore

public MapStore(java.util.Map<DBID,T> data)

Constructor.

Parameters:

data - Existing map

MapStore

public MapStore()

Constructor.

Method Detail

get

public T get(DBIDRef id)

Description copied from interface: DataStore

Retrieves an object from the storage.

Specified by:

get in interface DataStore<T>

Parameters:

id - Database ID.

Returns:

Object or null

put

public T put(DBIDRef id,
             T value)

Description copied from interface: WritableDataStore

Associates the specified value with the specified id in this storage. If the storage previously contained a value for the id, the previous value is replaced by the specified value.

Specified by:

put in interface WritableDataStore<T>

Parameters:

id - Database ID.

value - Value to store.

Returns:

previous value

destroy

public void destroy()

Description copied from interface: WritableDataStore

Deallocate the storage, freeing the memory and notifies the registered listeners.

Specified by:

destroy in interface WritableDataStore<T>

delete

public void delete(DBIDRef id)

Description copied from interface: WritableDataStore

Delete the contents for a particular ID and notifies the registered listeners.

Specified by:

delete in interface WritableDataStore<T>

Parameters:

id - Database ID.

clear

public void clear()

Description copied from interface: WritableDataStore

Clear the storage (resetting it to the default value).

Specified by:

clear in interface WritableDataStore<T>