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 * (the "License"); you may not use this file except in compliance with
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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 ClosureUtils. These include method invocation and for/while loops. 
Type parameters:
<T> – the type that the closure acts on
Since:
1.0/**
 * 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 invocation and for/while loops.
 *
 * @param <T> the type that the closure acts on
 * @since 1.0
 */
public interface Closure<T> {

    
Performs an action on the specified input object.
Params:
input –  the input to execute on
Throws:
ClassCastException – (runtime) if the input is the wrong class
IllegalArgumentException – (runtime) if the input is invalid
FunctorException – (runtime) if any other error occurs/**
     * 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);

}