/*

  * 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.scaffold.util;

 /**

  * Simple interface to describe public methods on a

  * business logic object.

  *

  * @author Ted Husted

  * @version $Revision: 155464 $ $Date: 2005-02-26 13:26:54 +0000 (Sat, 26 Feb 2005) $

  */

 public interface Executable {

 // ------------------------------------------------------- Public Methods

     /**

      * Perform business logic for this bean, often by passing default

      * values to the <code>Object execute(Object)</code> signature.

      * If there is no default, it is recommended that a subclass throw

      * an UnsupportedOperationException instead.

      * @exception Throws Exception on any error. A subclass of

      * ChainedException is recommended.

      */

     public Object execute() throws Exception;

     /**

      * Perform business logic for this, by retrieving any settings from

      * the parameter object, and return a result object.

      * @exception Throws Exception on any error. A subclass of

      * ChainedException is recommended.

      */

     public Object execute(Object parameters) throws Exception;

 }