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package de.lmu.ifi.dbs.elki.visualization.style;
/*
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 gnu.trove.list.array.TIntArrayList;
import gnu.trove.map.TObjectIntMap;
import gnu.trove.map.hash.TObjectIntHashMap;
import java.awt.Color;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import de.lmu.ifi.dbs.elki.data.Cluster;
import de.lmu.ifi.dbs.elki.data.Clustering;
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.logging.LoggingUtil;
import de.lmu.ifi.dbs.elki.visualization.colors.ColorLibrary;
import de.lmu.ifi.dbs.elki.visualization.svg.SVGUtil;
/**
* Styling policy based on cluster membership.
*
* @author Erich Schubert
*
*/
// TODO: fast enough? Some other kind of mapping we can use?
public class ClusterStylingPolicy implements ClassStylingPolicy {
/**
* Object IDs
*/
ArrayList<DBIDs> ids;
/**
* Map from cluster objects to color offsets.
*/
TObjectIntMap<Cluster<?>> cmap;
/**
* Colors
*/
TIntArrayList colors;
/**
* Clustering in use.
*/
Clustering<?> clustering;
/**
* Constructor.
*
* @param clustering Clustering to use.
*/
public ClusterStylingPolicy(Clustering<?> clustering, StyleLibrary style) {
super();
this.clustering = clustering;
ColorLibrary colorset = style.getColorSet(StyleLibrary.PLOT);
List<? extends Cluster<?>> clusters = clustering.getAllClusters();
ids = new ArrayList<>(clusters.size());
colors = new TIntArrayList(clusters.size());
cmap = new TObjectIntHashMap<>(clusters.size(), .5f, -1);
Iterator<? extends Cluster<?>> ci = clusters.iterator();
for (int i = 0; ci.hasNext(); i++) {
Cluster<?> c = ci.next();
ids.add(DBIDUtil.ensureSet(c.getIDs()));
cmap.put(c, i);
Color col = SVGUtil.stringToColor(colorset.getColor(i));
if (col != null) {
colors.add(col.getRGB());
} else {
LoggingUtil.warning("Unrecognized color name: " + colorset.getColor(i));
}
if (!ci.hasNext()) {
break;
}
}
}
@Override
public int getStyleForDBID(DBIDRef id) {
for (int i = 0; i < ids.size(); i++) {
if (ids.get(i).contains(id)) {
return i;
}
}
return -1;
}
@Override
public int getColorForDBID(DBIDRef id) {
for (int i = 0; i < ids.size(); i++) {
if (ids.get(i).contains(id)) {
return colors.get(i);
}
}
return 0;
}
@Override
public int getMinStyle() {
return 0;
}
@Override
public int getMaxStyle() {
return ids.size();
}
@Override
public DBIDIter iterateClass(int cnum) {
return ids.get(cnum).iter();
}
@Override
public int classSize(int cnum) {
return ids.get(cnum).size();
}
/**
* Get the clustering used by this styling policy
*
* @return Clustering in use
*/
public Clustering<?> getClustering() {
return clustering;
}
/**
* Get the style number for a cluster.
*
* @param c Cluster
* @return Style number
*/
public int getStyleForCluster(Cluster<?> c) {
return cmap.get(c);
}
}
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