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package de.lmu.ifi.dbs.elki.algorithm.outlier.spatial.neighborhood;
/*
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.DataStore;
import de.lmu.ifi.dbs.elki.database.ids.DBIDRef;
import de.lmu.ifi.dbs.elki.database.ids.DBIDUtil;
import de.lmu.ifi.dbs.elki.database.ids.DBIDs;
import de.lmu.ifi.dbs.elki.logging.Logging;
/**
* Abstract base class for precomputed neighborhoods.
*
* @author Erich Schubert
*/
public abstract class AbstractPrecomputedNeighborhood implements NeighborSetPredicate {
/**
* The data
*/
protected DataStore<DBIDs> store;
/**
* Constructor.
*
* @param store the actual data.
*/
public AbstractPrecomputedNeighborhood(DataStore<DBIDs> store) {
super();
this.store = store;
}
@Override
public DBIDs getNeighborDBIDs(DBIDRef reference) {
DBIDs neighbors = store.get(reference);
if(neighbors != null) {
return neighbors;
}
else {
// Use just the object itself.
if(getLogger().isDebugging()) {
getLogger().warning("No neighbors for object " + reference);
}
return DBIDUtil.deref(reference);
}
}
/**
* The logger to use for error reporting.
*
* @return Logger
*/
protected abstract Logging getLogger();
/**
* Factory class.
*
* @author Erich Schubert
*
* @apiviz.stereotype factory
* @apiviz.has AbstractPrecomputedNeighborhood
*/
public abstract static class Factory<O> implements NeighborSetPredicate.Factory<O> {
// Nothing to add.
}
}
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