Java tutorial
/* * Copyright 2001-2004 The Apache Software Foundation * * 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.apache.commons.collections; /** * Defines a functor interface implemented by classes that do something. * <p> * A <code>Closure</code> represents a block of code which is executed from * inside some block, function or iteration. It operates an input object. * <p> * Standard implementations of common closures are provided by * {@link ClosureUtils}. These include method invokation and for/while loops. * * @since Commons Collections 1.0 * @version $Revision: 1.11 $ $Date: 2004/04/14 20:08:56 $ * * @author James Strachan * @author Nicola Ken Barozzi * @author Stephen Colebourne */ public interface Closure { /** * Performs an action on the specified input object. * * @param input the input to execute on * @throws ClassCastException (runtime) if the input is the wrong class * @throws IllegalArgumentException (runtime) if the input is invalid * @throws FunctorException (runtime) if any other error occurs */ public void execute(Object input); }