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package org.apache.commons.collections;

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 invokation and for/while loops. 
Author:
James Strachan, Nicola Ken Barozzi, Stephen Colebourne
Since:
Commons Collections 1.0
Version:
$Revision: 646777 $ $Date: 2008-04-10 14:33:15 +0200 (Thu, 10 Apr 2008) $/**
 * 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: 646777 $ $Date: 2008-04-10 14:33:15 +0200 (Thu, 10 Apr 2008) $
 *
 * @author James Strachan
 * @author Nicola Ken Barozzi
 * @author Stephen Colebourne
 */
public interface Closure {

    
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
     */
    public void execute(Object input);

}