/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2011 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.annotation;

import com.rapidminer.operator.ports.InputPort;
import com.rapidminer.operator.ports.metadata.ExampleSetMetaData;
import com.rapidminer.operator.ports.metadata.MDInteger;
import com.rapidminer.operator.tools.AttributeSubsetSelector;

/** Evaluates resource consumption based on a simple polynomial function. 
 * 
 * @author Simon Fischer
 *
 */
public class PolynomialExampleSetResourceConsumptionEstimator extends ExampleSetResourceConsumptionEstimator {

	private final PolynomialFunction cpuFunction;
	private final PolynomialFunction memoryFunction;

	public PolynomialExampleSetResourceConsumptionEstimator(InputPort in, AttributeSubsetSelector selector,
			PolynomialFunction cpuFunction, PolynomialFunction memoryFunction) {
		super(in, selector);
		this.cpuFunction = cpuFunction;
		this.memoryFunction = memoryFunction;
	}

	protected int getNumberOfRelevantAttributes(ExampleSetMetaData emd) {
		return emd.getNumberOfRegularAttributes();	
	}
	
	@Override
	public long estimateMemory(ExampleSetMetaData exampleSet) {
		final MDInteger numEx = exampleSet.getNumberOfExamples();
		if (numEx == null) {
			return -1;
		} else if (numEx.getNumber() == 0) {
			return -1;
		}
		final int numAtt = getNumberOfRelevantAttributes(exampleSet);
		return cpuFunction.evaluate(numEx.getNumber(), numAtt);
	}

	@Override
	public long estimateRuntime(ExampleSetMetaData exampleSet) {
		final MDInteger numEx = exampleSet.getNumberOfExamples();
		if (numEx == null) {
			return -1;
		} else if (numEx.getNumber() == 0) {
			return -1;
		}
		final int numAtt = exampleSet.getNumberOfRegularAttributes();
		return memoryFunction.evaluate(numEx.getNumber(), numAtt);
	}
	
	@Override
	public PolynomialFunction getCpuFunction() {
		return cpuFunction;
	}
	
	@Override
	public PolynomialFunction getMemoryFunction() {
		return memoryFunction;
	}
}