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Diffstat (limited to 'src/de/lmu/ifi/dbs/elki/parallel/processor/WriteDataStoreProcessor.java')
-rw-r--r-- | src/de/lmu/ifi/dbs/elki/parallel/processor/WriteDataStoreProcessor.java | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/src/de/lmu/ifi/dbs/elki/parallel/processor/WriteDataStoreProcessor.java b/src/de/lmu/ifi/dbs/elki/parallel/processor/WriteDataStoreProcessor.java new file mode 100644 index 00000000..66ebf0a2 --- /dev/null +++ b/src/de/lmu/ifi/dbs/elki/parallel/processor/WriteDataStoreProcessor.java @@ -0,0 +1,108 @@ +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) 2014 + 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.WritableDataStore; +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.SharedObject; + +/** + * Output channel to store data in a {@link WritableDataStore}. + * + * @author Erich Schubert + * + * @param <T> data type + * + * @apiviz.has Instance + * @apiviz.uses SharedObject + * @apiviz.uses WritableDataStore + */ +public class WriteDataStoreProcessor<T> implements Processor { + /** + * Store to write to + */ + WritableDataStore<T> store; + + /** + * Input variable + */ + SharedObject<T> input; + + /** + * Constructor. + * + * @param store Data store to write to + */ + public WriteDataStoreProcessor(WritableDataStore<T> store) { + super(); + this.store = store; + } + + /** + * Connect the data source + * + * @param input Input + */ + public void connectInput(SharedObject<T> 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 { + /** + * Variable to exchange data over + */ + SharedObject.Instance<T> input; + + /** + * Constructor. + * + * @param input Input object + */ + public Instance(SharedObject.Instance<T> input) { + super(); + this.input = input; + } + + @Override + public void map(DBIDRef id) { + store.put(id, input.get()); + } + } +} |