/*
* JBoss, Home of Professional Open Source.
* Copyright 2016, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.clustering.function;
import java.util.function.Function;
/**
* {@link Function} utility methods.
* @author Paul Ferraro
*/
public class Functions {
/**
* Returns a function that always returns its input argument.
*
* @param <T> the input type to the function
* @param <R> the output type of the function
* @return a function that always returns its input argument
* @see {@link Function#identity()}
*/
public static <R, T extends R> Function<T, R> identity() {
return value -> value;
}
private Functions() {
// Hide
}
}