/**
* 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.text;
/**
* A {@link Function} to check whether a nominal value starts with a specific string.
*
* @author Thilo Kamradt
*
*/
public class Starts extends Abstract2StringInputBooleanOutputFunction {
/**
* Creates a function to check whether a nominal value starts with a specific string
*/
public Starts() {
super("text_information.starts");
}
@Override
protected Boolean compute(String value1, String value2) {
if (value1 == null || value2 == null) {
return null;
}
return value1.startsWith(value2);
}
}