/*
* Copyright (c) 2008-2014 MongoDB, Inc.
*
* 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 com.mongodb;
/**
* Apply a function to the input object yielding an appropriate result object. A function may variously provide a mapping between types,
* object instances or keys and values or any other form of transformation upon the input.
*
* @param <T> the type of input objects to the {@code apply} operation
* @param <R> the type of result objects from the {@code apply} operation. May be the same type as {@code <T>}.
*/
public interface Function<T, R> {
/**
* Yield an appropriate result object for the input object.
*
* @param t the input object
* @return the function result
*/
R apply(T t);
}