IdentifiableContainerBase


1   /*
2    * @(#)IdentifiableContainerBase.java   1.7 03/12/19
3    *
4    * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
5    * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
6    */
7   
8   package com.sun.corba.se.spi.ior;
9   
10  import java.util.List  ;
11  import java.util.ArrayList  ;
12  import java.util.Iterator  ;
13  
14  import com.sun.corba.se.impl.ior.FreezableList ;
15  
16  import com.sun.corba.se.spi.ior.TaggedComponent ;
17  import com.sun.corba.se.spi.ior.Identifiable ;
18  
19  /** Convenience class for defining objects that contain lists of Identifiables.
20   * Mainly implements iteratorById.  Also note that the constructor creates the
21   * list, which here is always an ArrayList, as this is much more efficient overall
22   * for short lists.
23   * @author  Ken Cavanaugh
24   */
25  public class IdentifiableContainerBase extends FreezableList
26  {
27      /** Create this class with an empty list of identifiables.
28       * The current implementation uses an ArrayList.
29       */
30      public IdentifiableContainerBase() 
31      {
32      super( new ArrayList  () ) ;
33      }
34      
35      /** Return an iterator which iterates over all contained Identifiables
36       * with type given by id.
37       */
38      public Iterator   iteratorById( final int id) 
39      {
40      return new Iterator  () {
41          Iterator   iter = IdentifiableContainerBase.this.iterator() ;
42          Object   current = advance() ;
43  
44          private Object   advance()
45          {
46          while (iter.hasNext()) {
47              Identifiable ide = (Identifiable)(iter.next()) ;
48              if (ide.getId() == id)
49              return ide ;
50          }
51  
52          return null ;
53          }
54  
55          public boolean hasNext() 
56          {
57          return current != null ;
58          }
59  
60          public Object   next()
61          {
62          Object   result = current ;
63          current = advance() ;
64          return result ;
65          }
66  
67          public void remove()
68          {
69          iter.remove() ;
70          }
71      } ;
72      }
73  }
74
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags