package de.lmu.ifi.dbs.elki.database.datastore.memory;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2011
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import de.lmu.ifi.dbs.elki.database.datastore.DataStoreFactory;
import de.lmu.ifi.dbs.elki.database.datastore.RangeIDMap;
import de.lmu.ifi.dbs.elki.database.datastore.WritableDataStore;
import de.lmu.ifi.dbs.elki.database.datastore.WritableRecordStore;
import de.lmu.ifi.dbs.elki.database.ids.DBIDRange;
import de.lmu.ifi.dbs.elki.database.ids.DBIDs;
/**
* Simple factory class that will store all data in memory using object arrays or hashmaps.
*
* Hints are currently not used by this implementation, since everything is in-memory.
*
* @author Erich Schubert
*
* @apiviz.stereotype factory
* @apiviz.uses ArrayStore oneway - - «create»
* @apiviz.uses ArrayRecordStore oneway - - «create»
* @apiviz.uses MapStore oneway - - «create»
* @apiviz.uses MapRecordStore oneway - - «create»
*/
public class MemoryDataStoreFactory implements DataStoreFactory {
@Override
public <T> WritableDataStore<T> makeStorage(DBIDs ids, int hints, Class<? super T> dataclass) {
if (ids instanceof DBIDRange) {
DBIDRange range = (DBIDRange) ids;
Object[] data = new Object[range.size()];
return new ArrayStore<T>(data, new RangeIDMap(range));
} else {
return new MapStore<T>();
}
}
@Override
public WritableRecordStore makeRecordStorage(DBIDs ids, int hints, Class<?>... dataclasses) {
if (ids instanceof DBIDRange) {
DBIDRange range = (DBIDRange) ids;
Object[][] data = new Object[range.size()][dataclasses.length];
return new ArrayRecordStore(data, new RangeIDMap(range));
} else {
return new MapRecordStore(dataclasses.length);
}
}
}