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package de.lmu.ifi.dbs.elki.visualization.gui.overview;
/*
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.*;
import org.w3c.dom.Element;
import de.lmu.ifi.dbs.elki.utilities.pairs.Pair;
import de.lmu.ifi.dbs.elki.visualization.VisualizationTask;
import de.lmu.ifi.dbs.elki.visualization.visualizers.Visualization;
/**
* Class to help keeping track of the materialized layers of the different visualizations.
*
* @author Erich Schubert
* @since 0.5.0
*
* @apiviz.has PlotItem
* @apiviz.has VisualizationTask
*/
public class LayerMap {
/**
* The actual map
*/
private HashMap<Pair<PlotItem, VisualizationTask>, Pair<Element, Visualization>> map = new HashMap<>();
/**
* Helper function for building a key object
*
* @param item Plot item
* @param task Visualization Task
* @return Key
*/
private Pair<PlotItem, VisualizationTask> key(PlotItem item, VisualizationTask task) {
return new Pair<>(item, task);
}
/**
* Helper function to build a value pair
*
* @param elem Container element
* @param vis Visualization
* @return Value object
*/
private Pair<Element, Visualization> value(Element elem, Visualization vis) {
return new Pair<>(elem, vis);
}
/**
* Get the visualization referenced by a item/key combination.
*
* @param item Plot ttem
* @param task Visualization task
* @return Visualization
*/
public Visualization getVisualization(PlotItem item, VisualizationTask task) {
Pair<Element, Visualization> pair = map.get(key(item, task));
if (pair == null) {
return null;
} else {
return pair.second;
}
}
/**
* Get the container element referenced by a item/key combination.
*
* @param item Plot item
* @param task Visualization task
* @return Container element
*/
public Element getContainer(PlotItem item, VisualizationTask task) {
Pair<Element, Visualization> pair = map.get(key(item, task));
if (pair == null) {
return null;
} else {
return pair.first;
}
}
/**
* Iterate over values
*
* @return Value iterable
*/
public Iterable<Pair<Element, Visualization>> values() {
return map.values();
}
/**
* Clear a map
*/
public void clear() {
map.clear();
}
/**
* Put a new combination into the map.
*
* @param it Plot item
* @param task Visualization Task
* @param elem Container element
* @param vis Visualization
*/
public void put(PlotItem it, VisualizationTask task, Element elem, Visualization vis) {
map.put(key(it, task), value(elem, vis));
}
/**
* Remove a combination.
*
* @param it Plot item
* @param task Visualization task
* @return Previous value
*/
public Pair<Element, Visualization> remove(PlotItem it, VisualizationTask task) {
return map.remove(key(it, task));
}
/**
* Put a new item into the visualizations
*
* @param it Plot item
* @param task Visualization task
* @param pair Pair object
*/
public void put(PlotItem it, VisualizationTask task, Pair<Element, Visualization> pair) {
map.put(key(it, task), pair);
}
/**
* Get a pair from the map
*
* @param it Plot item
* @param task Visualization task
* @return Pair object
*/
public Pair<Element, Visualization> get(PlotItem it, VisualizationTask task) {
return map.get(key(it, task));
}
}
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