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Diffstat (limited to 'src/de/lmu/ifi/dbs/elki/database/ProxyDatabase.java')
| -rw-r--r-- | src/de/lmu/ifi/dbs/elki/database/ProxyDatabase.java | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/src/de/lmu/ifi/dbs/elki/database/ProxyDatabase.java b/src/de/lmu/ifi/dbs/elki/database/ProxyDatabase.java new file mode 100644 index 00000000..01d552cb --- /dev/null +++ b/src/de/lmu/ifi/dbs/elki/database/ProxyDatabase.java @@ -0,0 +1,140 @@ +package de.lmu.ifi.dbs.elki.database; +/* +This file is part of ELKI: +Environment for Developing KDD-Applications Supported by Index-Structures + +Copyright (C) 2011 +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.Arrays; + +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.ids.StaticDBIDs; +import de.lmu.ifi.dbs.elki.database.relation.DBIDView; +import de.lmu.ifi.dbs.elki.database.relation.ProxyView; +import de.lmu.ifi.dbs.elki.database.relation.Relation; +import de.lmu.ifi.dbs.elki.logging.Logging; + +/** + * A proxy database to use e.g. for projections and partitions. + * + * @author Erich Schubert + */ +public class ProxyDatabase extends AbstractDatabase { + /** + * Logger class. + */ + private static final Logging logger = Logging.getLogger(ProxyDatabase.class); + + /** + * Our DBIDs + */ + final protected DBIDs ids; + + /** + * Our DBID representation + */ + final protected DBIDView idrep; + + /** + * Constructor. + * + * @param ids DBIDs to use + */ + public ProxyDatabase(DBIDs ids) { + super(); + this.ids = ids; + this.idrep = new DBIDView(this, this.ids); + this.relations.add(idrep); + this.addChildResult(idrep); + } + + /** + * Constructor. + * + * @param ids DBIDs to use + * @param relations Relations to contain + */ + public ProxyDatabase(DBIDs ids, Iterable<Relation<?>> relations) { + super(); + this.ids = ids; + this.idrep = new DBIDView(this, this.ids); + this.relations.add(idrep); + this.addChildResult(idrep); + for(Relation<?> orel : relations) { + Relation<?> relation = ProxyView.wrap(this, ids, orel); + this.relations.add(relation); + this.addChildResult(relation); + } + } + + /** + * Constructor. + * + * @param ids DBIDs to use + * @param relations Relations to contain + */ + public ProxyDatabase(DBIDs ids, Relation<?>... relations) { + this(ids, Arrays.asList(relations)); + } + + /** + * Constructor, proxying all relations of an existing database. + * + * @param ids ids to proxy + * @param database Database to wrap + */ + public ProxyDatabase(DBIDs ids, Database database) { + this(ids, database.getRelations()); + } + + @Override + public void initialize() { + // Nothing to do - we were initialized on construction time. + } + + /** + * Add a new representation. + * + * @param relation Representation to add. + */ + public void addRelation(Relation<?> relation) { + this.relations.add(relation); + } + + @SuppressWarnings("deprecation") + @Deprecated + @Override + public int size() { + return ids.size(); + } + + @SuppressWarnings("deprecation") + @Deprecated + @Override + public StaticDBIDs getDBIDs() { + return DBIDUtil.makeUnmodifiable(ids); + } + + @Override + protected Logging getLogger() { + return logger; + } +}
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