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

java.lang.Object
  de.lmu.ifi.dbs.elki.database.datastore.memory.MapRecordStore

All Implemented Interfaces:

RecordStore, WritableRecordStore

public class MapRecordStore
extends Object
implements WritableRecordStore

A class to answer representation queries using a map and an index within the record.

Nested Class Summary

protected class

MapRecordStore.StorageAccessor<T> Access a single record in the given data.

Field Summary

private Map<DBID,Object[]>	data Storage Map
private int	rlen Record length

Constructor Summary

MapRecordStore(int rlen)
Constructor without existing data.

MapRecordStore(int rlen, Map<DBID,Object[]> data)
Constructor with existing data.

Method Summary

protected <T> T	get(DBID id, int index) Actual getter
<T> WritableDataStore<T>	getStorage(int col, Class<? super T> datatype) Get a WritableDataStore instance for a particular record column.
boolean	remove(DBID id) Remove an object from the store, all columns.
protected <T> T	set(DBID id, int index, T value) Actual setter

Methods inherited from class java.lang.Object

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

Field Detail

rlen

private final int rlen

Record length

data

private final Map<DBID,Object[]> data

Storage Map

Constructor Detail

MapRecordStore

public MapRecordStore(int rlen,
                      Map<DBID,Object[]> data)

Constructor with existing data.

Parameters:

rlen - Number of columns (record length)

data - Existing data map

MapRecordStore

public MapRecordStore(int rlen)

Constructor without existing data.

Parameters:

rlen - Number of columns (record length)

Method Detail

getStorage

public <T> WritableDataStore<T> getStorage(int col,
                                           Class<? super T> datatype)

Description copied from interface: WritableRecordStore

Get a WritableDataStore instance for a particular record column.

Specified by:

getStorage in interface RecordStore

Specified by:

getStorage in interface WritableRecordStore

Type Parameters:

T - Data type

Parameters:

col - Column number

datatype - data class

Returns:

writable storage

get

protected <T> T get(DBID id,
                    int index)

Actual getter

Parameters:

id - Database ID

index - column index

Returns:

current value

set

protected <T> T set(DBID id,
                    int index,
                    T value)

Actual setter

Parameters:

id - Database ID

index - column index

value - new value

Returns:

previous value

remove

public boolean remove(DBID id)

Description copied from interface: WritableRecordStore

Remove an object from the store, all columns.

Specified by:

remove in interface WritableRecordStore

Parameters:

id - object ID to remove

Returns:

success code