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 * Licensed to the Apache Software Foundation (ASF) under one or more
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 * The ASF licenses this file to You 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
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 *      http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.commons.collections4;

/**
 * Defines a functor interface implemented by classes that do something.
 * 

* A Closure represents a block of code which is executed from * inside some block, function or iteration. It operates an input object. *

* Standard implementations of common closures are provided by * {@link ClosureUtils}. These include method invocation and for/while loops. * * @param the type that the closure acts on * @since 1.0 * @version $Id: Closure.java 1543261 2013-11-19 00:47:34Z ggregory $ */ 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 */ void execute(T input); }





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