/*
 * Copyright 2017 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.statemachine.support;

/**
 * Mimics Java 8's Function interface to allow deferring a computation.
 *
 * @author Janne Valkealahti
 *
 * @param <T> the type of the input to the function
 * @param <R> the type of the result of the function
 */
public interface Function<T, R> {

	/**
	 * Applies this function to the given argument.
	 *
	 * @param t the function argument
	 * @return the function result
	 */
	R apply(T t);
}
