cvs commit: jakarta-commons/collections/src/java/org/apache/commons/collections Unmodifiable.java

[sc...@apache.org]

scolebourne    2003/11/02 09:05:50

  Added:       collections/src/java/org/apache/commons/collections
                        Unmodifiable.java
  Log:
  Marker interface for unmodifiable collections/maps/iterators/pairs
  
  Revision  Changes    Path
  1.1                  jakarta-commons/collections/src/java/org/apache/commons/collections/Unmodifiable.java
  
  Index: Unmodifiable.java
  ===================================================================
  /*
   * $Header: /home/cvs/jakarta-commons/collections/src/java/org/apache/commons/collections/Unmodifiable.java,v 1.1 2003/11/02 17:05:50 scolebourne Exp $
   * ====================================================================
   *
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2001-2003 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
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   *
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  package org.apache.commons.collections;
  
  /**
   * Marker interface for collections, maps and iterators that are unmodifiable.
   * <p>
   * This interface enables testing such as:
   * <pre>
   * if (coll instanceof Unmodifiable) {
   *   coll = new ArrayList(coll);
   * }
   * // now we know coll is modifiable
   * </pre>
   * Of course all this only works if you use the Unmodifiable classes defined
   * in this library. If you use the JDK unmodifiable class via java util Collections
   * then the interface won't be there.
   *  
   * @since Commons Collections 3.0
   * @version $Revision: 1.1 $ $Date: 2003/11/02 17:05:50 $
   *
   * @author Stephen Colebourne
   */
  public interface Unmodifiable {
      // marker interface
  }
  
  
  

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