ParameterizedRunnable


1   /*******************************************************************************
2    * Copyright (c) 2004, 2005 IBM Corporation and others.
3    * All rights reserved. This program and the accompanying materials
4    * are made available under the terms of the Eclipse Public License v1.0
5    * which accompanies this distribution, and is available at
6    * http://www.eclipse.org/legal/epl-v10.html
7    * 
8    * Contributors:
9    *     IBM Corporation - initial API and implementation
10   *******************************************************************************/
11  package org.eclipse.osgi.service.runnable;
12  
13  /**
14   * Like a {@link java.lang.Runnable}, an object which captures a block of code which can 
15   * be passed around and executed.  Unlike standard runnables, paramaterized 
16   * runnables allow an arbitrary {@link java.lang.Object} to be passed in when the 
17   * block is evaluated.
18   * <p>
19   * Clients may implement this interface.
20   * </p>
21   * @since 3.0
22   */
23  public interface ParameterizedRunnable {
24  
25      /**
26       * Executes the block of code encapsulated by this runnable in the context of
27       * the given object and returns the result.  The result may be <code>null</code>.
28       * 
29       * @param context the context for evaluating the runnable
30       * @return the result of evaluating the runnable in the given context
31       * @throws Exception if there is a problem running this runnable
32       */
33      public Object   run(Object   context) throws Exception  ;
34  }
35

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