/*
* RapidMiner
*
* Copyright (C) 2001-2008 by Rapid-I and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapid-i.com
*
* 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/.
*/
package com.rapidminer.operator.meta;
import java.util.Collection;
import com.rapidminer.operator.IOContainer;
import com.rapidminer.operator.Operator;
import com.rapidminer.operator.OperatorDescription;
import com.rapidminer.operator.OperatorException;
import com.rapidminer.operator.ValueDouble;
import com.rapidminer.operator.condition.InnerOperatorCondition;
import com.rapidminer.operator.condition.LastInnerOperatorCondition;
import com.rapidminer.operator.performance.PerformanceVector;
/**
* This operator provides basic functions for all other
* parameter optimization operators.
*
* @author Ingo Mierswa, Helge Homburg, Tobias Malbrecht
* @version $Id: ParameterOptimizationOperator.java,v 1.13 2006/04/05 08:57:26
* ingomierswa Exp $
*/
public abstract class ParameterOptimizationOperator extends ParameterIteratingOperatorChain {
public ParameterOptimizationOperator(OperatorDescription description) {
super(description);
addValue(new ValueDouble("performance", "currently best performance") {
public double getDoubleValue() {
return getCurrentBestPerformance();
}
});
}
public abstract double getCurrentBestPerformance();
/**
* Applies the given operators and employs the PerformanceEvaluator for
* calculating a list of performance criteria which is returned.
*/
protected PerformanceVector getPerformance(IOContainer input, Collection<Operator> operators) {
try {
for (Operator operator : operators) {
input = operator.apply(input);
}
return input.remove(PerformanceVector.class);
} catch (OperatorException e) {
logWarning("Cannot evaluate performance for current parameter combination: " + e.getMessage());
return null;
}
}
/**
* Applies the inner operator and employs the PerformanceEvaluator for
* calculating a list of performance criteria which is returned.
*/
protected PerformanceVector getPerformance() {
IOContainer resultContainer = getInput();
try {
for (int i = 0; i < getNumberOfOperators(); i++) {
resultContainer = getOperator(i).apply(resultContainer);
}
return resultContainer.remove(PerformanceVector.class);
} catch (OperatorException e) {
logWarning("Cannot evaluate performance for current parameter combination: " + e.getMessage());
return null;
}
}
public InnerOperatorCondition getInnerOperatorCondition() {
return new LastInnerOperatorCondition(new Class[] { PerformanceVector.class });
}
public Class<?>[] getInputClasses() {
return new Class[0];
}
public Class<?>[] getOutputClasses() {
return new Class[] { ParameterSet.class, PerformanceVector.class };
}
}