package de.lmu.ifi.dbs.elki.index.preprocessed.preference;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2013
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 .
*/
import java.util.BitSet;
import de.lmu.ifi.dbs.elki.data.NumberVector;
import de.lmu.ifi.dbs.elki.data.type.TypeInformation;
import de.lmu.ifi.dbs.elki.data.type.TypeUtil;
import de.lmu.ifi.dbs.elki.database.ids.DBIDRef;
import de.lmu.ifi.dbs.elki.database.relation.Relation;
import de.lmu.ifi.dbs.elki.index.preprocessed.AbstractPreprocessorIndex;
import de.lmu.ifi.dbs.elki.utilities.optionhandling.Parameterizable;
/**
* Abstract base class for preference vector based algorithms.
*
* @author Erich Schubert
*
* @param Number vector
*/
public abstract class AbstractPreferenceVectorIndex> extends AbstractPreprocessorIndex implements PreferenceVectorIndex {
/**
* Constructor.
*
* @param relation Relation to use
*/
public AbstractPreferenceVectorIndex(Relation relation) {
super(relation);
}
@Override
public BitSet getPreferenceVector(DBIDRef objid) {
if(storage == null) {
initialize();
}
return storage.get(objid);
}
/**
* Factory class.
*
* @author Erich Schubert
*
* @apiviz.stereotype factory
* @apiviz.uses AbstractPreferenceVectorIndex oneway - - «create»
*/
public abstract static class Factory, I extends PreferenceVectorIndex> implements PreferenceVectorIndex.Factory, Parameterizable {
@Override
public abstract I instantiate(Relation relation);
@Override
public TypeInformation getInputTypeRestriction() {
return TypeUtil.NUMBER_VECTOR_FIELD;
}
}
}