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package de.lmu.ifi.dbs.elki.gui.multistep.panels;
/*
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.lang.ref.WeakReference;
import de.lmu.ifi.dbs.elki.result.HierarchicalResult;
import de.lmu.ifi.dbs.elki.utilities.designpattern.Observer;
import de.lmu.ifi.dbs.elki.utilities.exceptions.AbortException;
import de.lmu.ifi.dbs.elki.utilities.optionhandling.parameterization.Parameterization;
import de.lmu.ifi.dbs.elki.workflow.OutputStep;
/**
* Panel to handle result output / visualization
*
* @author Erich Schubert
*/
public class OutputTabPanel extends ParameterTabPanel implements Observer<Object> {
/**
* Serial version.
*/
private static final long serialVersionUID = 1L;
/**
* The data input configured
*/
private OutputStep outs = null;
/**
* Result we ran last on
*/
private WeakReference<?> basedOnResult = null;
/**
* Input step to run on.
*/
private final InputTabPanel input;
/**
* Algorithm step to run on.
*/
private final EvaluationTabPanel evals;
/**
* Constructor. We depend on an input panel.
*
* @param input Input panel to depend on.
*/
public OutputTabPanel(InputTabPanel input, EvaluationTabPanel evals) {
super();
this.input = input;
this.evals = evals;
input.addObserver(this);
evals.addObserver(this);
}
@Override
protected synchronized void configureStep(Parameterization config) {
outs = config.tryInstantiate(OutputStep.class);
if (config.getErrors().size() > 0) {
outs = null;
}
basedOnResult = null;
}
@Override
protected void executeStep() {
if (input.canRun() && !input.isComplete()) {
input.execute();
}
if (evals.canRun() && !evals.isComplete()) {
evals.execute();
}
if (!input.isComplete()) {
throw new AbortException("Input data not available.");
}
if (!evals.isComplete()) {
throw new AbortException("Evaluation failed.");
}
// Get the database and run the algorithms
HierarchicalResult result = evals.getEvaluationStep().getResult();
outs.runResultHandlers(result);
basedOnResult = new WeakReference<Object>(result);
}
@Override
protected String getStatus() {
if (outs == null) {
return STATUS_UNCONFIGURED;
}
if (!input.canRun() || !evals.canRun()) {
return STATUS_CONFIGURED;
}
checkDependencies();
if (input.isComplete() && evals.isComplete() && basedOnResult != null) {
// TODO: is there a FAILED state here, too?
return STATUS_COMPLETE;
}
return STATUS_READY;
}
@Override
public void update(Object o) {
if (o == input || o == evals) {
checkDependencies();
updateStatus();
}
}
/**
* Test if the dependencies are still valid.
*/
private void checkDependencies() {
if(basedOnResult != null) {
if(!input.isComplete() || !evals.isComplete() || basedOnResult.get() != evals.getEvaluationStep().getResult()) {
// We've become invalidated, notify.
basedOnResult = null;
observers.notifyObservers(this);
}
}
}
}
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