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package de.lmu.ifi.dbs.elki.parallel.processor;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2015
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.WritableDoubleDataStore;
import de.lmu.ifi.dbs.elki.database.ids.DBIDRef;
import de.lmu.ifi.dbs.elki.parallel.Executor;
import de.lmu.ifi.dbs.elki.parallel.variables.SharedDouble;
/**
* Write double values into a {@link WritableDoubleDataStore}.
*
* @author Erich Schubert
* @since 0.7.0
*
* @apiviz.has Instance
* @apiviz.uses SharedDouble
* @apiviz.uses WritableDoubleDataStore
*/
public class WriteDoubleDataStoreProcessor implements Processor {
/**
* Store to write to
*/
WritableDoubleDataStore store;
/**
* Shared double variable
*/
SharedDouble input;
/**
* Constructor.
*
* @param store Data store to write to
*/
public WriteDoubleDataStoreProcessor(WritableDoubleDataStore store) {
super();
this.store = store;
}
/**
* Connect the input variable
*
* @param input Input variable
*/
public void connectInput(SharedDouble input) {
this.input = input;
}
@Override
public Instance instantiate(Executor executor) {
return new Instance(executor.getInstance(input));
}
@Override
public void cleanup(Processor.Instance inst) {
// Nothing to do.
}
/**
* Instance for a sub-channel.
*
* @author Erich Schubert
*/
public class Instance implements Processor.Instance {
/**
* Shared double variable
*/
SharedDouble.Instance input;
/**
* Constructor.
*
* @param input Input
*/
public Instance(SharedDouble.Instance input) {
super();
this.input = input;
}
@Override
public void map(DBIDRef id) {
store.putDouble(id, input.doubleValue());
}
}
}
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