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package de.lmu.ifi.dbs.elki.database.relation;
/*
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.type.SimpleTypeInformation;
import de.lmu.ifi.dbs.elki.data.type.TypeUtil;
import de.lmu.ifi.dbs.elki.database.Database;
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.DBIDs;
import de.lmu.ifi.dbs.elki.result.AbstractHierarchicalResult;
/**
* Representation adapter that uses toString() to produce a string
* representation.
*
* @author Erich Schubert
*/
public class ConvertToStringView extends AbstractHierarchicalResult implements Relation<String> {
/**
* The database we use
*/
final Relation<?> existing;
/**
* Constructor.
*
* @param existing Existing representation
*/
public ConvertToStringView(Relation<?> existing) {
super();
this.existing = existing;
}
@Override
public Database getDatabase() {
return existing.getDatabase();
}
@Override
public String get(DBIDRef id) {
return existing.get(id).toString();
}
@Override
public void set(DBIDRef id, String val) {
throw new UnsupportedOperationException("Covnersion representations are not writable!");
}
@Override
public void delete(DBIDRef id) {
throw new UnsupportedOperationException("Covnersion representations are not writable!");
}
@Override
public DBIDs getDBIDs() {
return existing.getDBIDs();
}
@Override
public DBIDIter iterDBIDs() {
return existing.iterDBIDs();
}
@Override
public int size() {
return existing.size();
}
@Override
public SimpleTypeInformation<String> getDataTypeInformation() {
return TypeUtil.STRING;
}
@Override
public String getLongName() {
return "toString(" + existing.getLongName() + ")";
}
@Override
public String getShortName() {
return "tostring-" + existing.getShortName();
}
}
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