/**
* Copyright (C) 2001-2017 by RapidMiner and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapidminer.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.tools.expression.internal.function.comparison;
import com.rapidminer.tools.expression.FunctionDescription;
/**
* Class for the GREATER THAN function that has two numerical or two nominal inputs
*
* @author Sabrina Kirstein
*/
public class GreaterThan extends AbstractComparisonFunctionWith2Inputs {
/**
* Constructs a GREATER THAN Function with 2 parameters with {@link FunctionDescription}
*/
public GreaterThan() {
super("comparison.greater_than");
}
@Override
protected Boolean compute(double left, double right) {
if (Double.isNaN(left) || Double.isNaN(right)) {
// like it was done before
return false;
} else {
return left > right;
}
}
@Override
protected Boolean compute(String left, String right) {
if (left == null || right == null) {
// was an error before, consistent to double compute function
return false;
} else {
return left.compareTo(right) > 0;
}
}
}