| /* |
| * Copyright (c) OSGi Alliance (2014). All Rights Reserved. |
| * |
| * 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.osgi.util.function; |
| |
| import org.osgi.annotation.versioning.ConsumerType; |
| |
| /** |
| * A function that accepts a single argument and produces a result. |
| * |
| * <p> |
| * This is a functional interface and can be used as the assignment target for a |
| * lambda expression or method reference. |
| * |
| * @param <T> The type of the function input. |
| * @param <R> The type of the function output. |
| * |
| * @ThreadSafe |
| * @author $Id: 5d812f75c0b4f88f01083189babb3ef7476b5ced $ |
| */ |
| @ConsumerType |
| public interface Function<T, R> { |
| /** |
| * Applies this function to the specified argument. |
| * |
| * @param t The input to this function. |
| * @return The output of this function. |
| */ |
| R apply(T t); |
| } |