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package de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.flat;
/*
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 java.util.ArrayList;
import java.util.List;
import de.lmu.ifi.dbs.elki.data.NumberVector;
import de.lmu.ifi.dbs.elki.database.ids.DBID;
import de.lmu.ifi.dbs.elki.database.ids.DBIDIter;
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.database.query.distance.DistanceQuery;
import de.lmu.ifi.dbs.elki.database.query.distance.SpatialDistanceQuery;
import de.lmu.ifi.dbs.elki.database.query.knn.KNNQuery;
import de.lmu.ifi.dbs.elki.database.query.range.RangeQuery;
import de.lmu.ifi.dbs.elki.database.relation.Relation;
import de.lmu.ifi.dbs.elki.index.DynamicIndex;
import de.lmu.ifi.dbs.elki.index.KNNIndex;
import de.lmu.ifi.dbs.elki.index.RangeIndex;
import de.lmu.ifi.dbs.elki.index.tree.IndexTreePath;
import de.lmu.ifi.dbs.elki.index.tree.spatial.SpatialEntry;
import de.lmu.ifi.dbs.elki.index.tree.spatial.SpatialPointLeafEntry;
import de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.AbstractRTreeSettings;
import de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.query.RStarTreeUtil;
import de.lmu.ifi.dbs.elki.logging.Logging;
import de.lmu.ifi.dbs.elki.persistent.PageFile;
/**
* The common use of the flat rstar tree: indexing number vectors.
*
* @author Erich Schubert
*
* @param <O> Object type
*/
public class FlatRStarTreeIndex<O extends NumberVector> extends FlatRStarTree implements RangeIndex<O>, KNNIndex<O>, DynamicIndex {
/**
* The relation we index
*/
private Relation<O> relation;
/**
* Constructor.
*
* @param relation Relation to index
* @param pagefile Page file
* @param settings Tree settings
*/
public FlatRStarTreeIndex(Relation<O> relation, PageFile<FlatRStarTreeNode> pagefile, AbstractRTreeSettings settings) {
super(pagefile, settings);
this.relation = relation;
}
/**
* The appropriate logger for this index.
*/
private static final Logging LOG = Logging.getLogger(FlatRStarTreeIndex.class);
/**
* Wrap a vector as spatial point leaf entry.
*
* @param id Object DBID
* @return spatial leaf
*/
protected SpatialEntry createNewLeafEntry(DBID id) {
return new SpatialPointLeafEntry(id, relation.get(id));
}
@Override
public void initialize() {
super.initialize();
insertAll(relation.getDBIDs());
}
/**
* Inserts the specified real vector object into this index.
*
* @param id the object id that was inserted
*/
@Override
public final void insert(DBIDRef id) {
insertLeaf(createNewLeafEntry(DBIDUtil.deref(id)));
}
/**
* Inserts the specified objects into this index. If a bulk load mode is
* implemented, the objects are inserted in one bulk.
*
* @param ids the objects to be inserted
*/
@Override
public final void insertAll(DBIDs ids) {
if(ids.isEmpty() || (ids.size() == 1)) {
return;
}
// Make an example leaf
if(canBulkLoad()) {
List<SpatialEntry> leafs = new ArrayList<>(ids.size());
for (DBIDIter iter = ids.iter(); iter.valid(); iter.advance()) {
leafs.add(createNewLeafEntry(DBIDUtil.deref(iter)));
}
bulkLoad(leafs);
}
else {
for (DBIDIter iter = ids.iter(); iter.valid(); iter.advance()) {
insert(iter);
}
}
doExtraIntegrityChecks();
}
/**
* Deletes the specified object from this index.
*
* @return true if this index did contain the object with the specified id,
* false otherwise
*/
@Override
public final boolean delete(DBIDRef id) {
// find the leaf node containing o
O obj = relation.get(id);
IndexTreePath<SpatialEntry> deletionPath = findPathToObject(getRootPath(), obj, id);
if(deletionPath == null) {
return false;
}
deletePath(deletionPath);
return true;
}
@Override
public void deleteAll(DBIDs ids) {
for (DBIDIter iter = ids.iter(); iter.valid(); iter.advance()) {
delete(DBIDUtil.deref(iter));
}
}
@Override
public RangeQuery<O> getRangeQuery(DistanceQuery<O> distanceQuery, Object... hints) {
// Query on the relation we index
if(distanceQuery.getRelation() != relation) {
return null;
}
// Can we support this distance function - spatial distances only!
if(!(distanceQuery instanceof SpatialDistanceQuery)) {
return null;
}
SpatialDistanceQuery<O> dq = (SpatialDistanceQuery<O>) distanceQuery;
return RStarTreeUtil.getRangeQuery(this, dq, hints);
}
@Override
public KNNQuery<O> getKNNQuery(DistanceQuery<O> distanceQuery, Object... hints) {
// Query on the relation we index
if(distanceQuery.getRelation() != relation) {
return null;
}
// Can we support this distance function - spatial distances only!
if(!(distanceQuery instanceof SpatialDistanceQuery)) {
return null;
}
SpatialDistanceQuery<O> dq = (SpatialDistanceQuery<O>) distanceQuery;
return RStarTreeUtil.getKNNQuery(this, dq, hints);
}
@Override
public String getLongName() {
return "Flat R*-Tree";
}
@Override
public String getShortName() {
return "flatrstartree";
}
@Override
protected Logging getLogger() {
return LOG;
}
}
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