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package de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants;
/*
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 <http://www.gnu.org/licenses/>.
*/
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.index.Index;
import de.lmu.ifi.dbs.elki.index.PagedIndexFactory;
import de.lmu.ifi.dbs.elki.index.tree.spatial.SpatialEntry;
import de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.strategies.bulk.BulkSplit;
import de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.strategies.insert.CombinedInsertionStrategy;
import de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.strategies.insert.InsertionStrategy;
import de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.strategies.overflow.LimitedReinsertOverflowTreatment;
import de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.strategies.overflow.OverflowTreatment;
import de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.strategies.split.SplitStrategy;
import de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.strategies.split.TopologicalSplitter;
import de.lmu.ifi.dbs.elki.persistent.PageFileFactory;
import de.lmu.ifi.dbs.elki.utilities.optionhandling.OptionID;
import de.lmu.ifi.dbs.elki.utilities.optionhandling.constraints.GreaterConstraint;
import de.lmu.ifi.dbs.elki.utilities.optionhandling.constraints.LessConstraint;
import de.lmu.ifi.dbs.elki.utilities.optionhandling.parameterization.Parameterization;
import de.lmu.ifi.dbs.elki.utilities.optionhandling.parameters.DoubleParameter;
import de.lmu.ifi.dbs.elki.utilities.optionhandling.parameters.ObjectParameter;
/**
* Abstract factory for R*-Tree based trees.
*
* @author Erich Schubert
*
* @apiviz.stereotype factory
* @apiviz.uses AbstractRStarTree oneway - - «create»
*
* @param <O> Object type
* @param <N> Node type
* @param <E> Entry type
* @param <I> Index type
*/
public abstract class AbstractRStarTreeFactory<O extends NumberVector<?>, N extends AbstractRStarTreeNode<N, E>, E extends SpatialEntry, I extends AbstractRStarTree<N, E, S> & Index, S extends AbstractRTreeSettings> extends PagedIndexFactory<O, I> {
/**
* Tree settings
*/
protected S settings;
/**
* Constructor.
*
* @param pageFileFactory Page file factory
* @param settings Tree settings
*/
public AbstractRStarTreeFactory(PageFileFactory<?> pageFileFactory, S settings) {
super(pageFileFactory);
this.settings = settings;
}
@Override
public TypeInformation getInputTypeRestriction() {
return TypeUtil.NUMBER_VECTOR_FIELD;
}
/**
* Parameterization class.
*
* @author Erich Schubert
*
* @apiviz.exclude
*
* @param <O> Object type
* @param <S> Settings class
*/
public abstract static class Parameterizer<O extends NumberVector<?>, S extends AbstractRTreeSettings> extends PagedIndexFactory.Parameterizer<O> {
/**
* Fast-insertion parameter. Optional.
*/
public static OptionID INSERTION_STRATEGY_ID = new OptionID("rtree.insertionstrategy", "The strategy to use for object insertion.");
/**
* Split strategy parameter. Optional.
*/
public static OptionID SPLIT_STRATEGY_ID = new OptionID("rtree.splitstrategy", "The strategy to use for node splitting.");
/**
* Parameter for bulk strategy
*/
public static final OptionID BULK_SPLIT_ID = new OptionID("spatial.bulkstrategy", "The class to perform the bulk split with.");
/**
* Parameter for the relative minimum fill.
*/
public static final OptionID MINIMUM_FILL_ID = new OptionID("rtree.minimum-fill", "Minimum relative fill required for data pages.");
/**
* Overflow treatment.
*/
public static OptionID OVERFLOW_STRATEGY_ID = new OptionID("rtree.overflowtreatment", "The strategy to use for handling overflows.");
/**
* Tree settings
*/
protected S settings;
/**
* Create the settings object
*
* @return Settings instance.
*/
abstract protected S createSettings();
@Override
protected void makeOptions(Parameterization config) {
super.makeOptions(config);
settings = createSettings();
ObjectParameter<InsertionStrategy> insertionStrategyP = new ObjectParameter<>(INSERTION_STRATEGY_ID, InsertionStrategy.class, CombinedInsertionStrategy.class);
if (config.grab(insertionStrategyP)) {
settings.insertionStrategy = insertionStrategyP.instantiateClass(config);
}
ObjectParameter<SplitStrategy> splitStrategyP = new ObjectParameter<>(SPLIT_STRATEGY_ID, SplitStrategy.class, TopologicalSplitter.class);
if (config.grab(splitStrategyP)) {
settings.nodeSplitter = splitStrategyP.instantiateClass(config);
}
DoubleParameter minimumFillP = new DoubleParameter(MINIMUM_FILL_ID, 0.4);
minimumFillP.addConstraint(new GreaterConstraint(0.0));
minimumFillP.addConstraint(new LessConstraint(0.5));
if (config.grab(minimumFillP)) {
settings.relativeMinFill = minimumFillP.getValue();
}
ObjectParameter<OverflowTreatment> overflowP = new ObjectParameter<>(OVERFLOW_STRATEGY_ID, OverflowTreatment.class, LimitedReinsertOverflowTreatment.class);
if (config.grab(overflowP)) {
settings.setOverflowTreatment(overflowP.instantiateClass(config));
}
configBulkLoad(config);
}
/**
* Configure the bulk load parameters.
*
* @param config Parameterization
*/
protected void configBulkLoad(Parameterization config) {
ObjectParameter<BulkSplit> bulkSplitP = new ObjectParameter<>(BULK_SPLIT_ID, BulkSplit.class, true);
if (config.grab(bulkSplitP)) {
settings.bulkSplitter = bulkSplitP.instantiateClass(config);
}
}
@Override
protected abstract AbstractRStarTreeFactory<O, ?, ?, ?, ?> makeInstance();
}
}
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