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package de.lmu.ifi.dbs.elki.datasource.filter;
/*
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.ids.DBIDVar;
import de.lmu.ifi.dbs.elki.datasource.bundle.BundleStreamSource;
import de.lmu.ifi.dbs.elki.datasource.bundle.MultipleObjectsBundle;
/**
* Abstract base class for streaming filters.
*
* @author Erich Schubert
*/
public abstract class AbstractStreamFilter implements StreamFilter {
/**
* Data source
*/
protected BundleStreamSource source = null;
@Override
public MultipleObjectsBundle filter(MultipleObjectsBundle objects) {
return init(objects.asStream()).asMultipleObjectsBundle();
}
@Override
public BundleStreamSource init(BundleStreamSource source) {
this.source = source;
return this;
}
@Override
public boolean hasDBIDs() {
return source.hasDBIDs();
}
@Override
public boolean assignDBID(DBIDVar var) {
return source.assignDBID(var);
}
@Override
public MultipleObjectsBundle asMultipleObjectsBundle() {
return MultipleObjectsBundle.fromStream(this);
}
}
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