InterfaceCollection


1   /* Copyright (C) 2003 Vladimir Roubtsov. All rights reserved.
2    * 
3    * This program and the accompanying materials are made available under
4    * the terms of the Common Public License v1.0 which accompanies this distribution,
5    * and is available at http://www.eclipse.org/legal/cpl-v10.html
6    * 
7    * $Id: InterfaceCollection.java,v 1.1.1.1 2004/05/09 16:57:46 vlad_r Exp $
8    */
9   package com.vladium.jcd.cls;
10  
11  import java.io.IOException  ;
12  
13  import com.vladium.jcd.lib.UDataOutputStream;
14  import com.vladium.util.IntVector;
15  
16  // ----------------------------------------------------------------------------
17  /**
18   * @author (C) 2001, Vlad Roubtsov
19   */
20  final class InterfaceCollection implements IInterfaceCollection
21  {
22      // public: ................................................................
23      
24      // ACCESSORS:
25  
26      public int get (final int offset)
27      {
28          return m_interfaces.get (offset);
29      }
30      
31      public int size ()
32      {
33          return m_interfaces.size ();
34      }
35      
36      // Cloneable:
37      
38      /**
39       * Performs a deep copy.
40       */
41      public Object   clone ()
42      {
43          try
44          {
45              final InterfaceCollection _clone = (InterfaceCollection) super.clone ();
46              
47              // deep clone:
48              _clone.m_interfaces = (IntVector) m_interfaces.clone ();
49              
50              return _clone;
51          }
52          catch (CloneNotSupportedException   e)
53          {
54              throw new InternalError   (e.toString ());
55          }        
56      }
57          
58      // IClassFormatOutput:
59      
60      public void writeInClassFormat (final UDataOutputStream out) throws IOException  
61      {
62          int _interfaces_count = m_interfaces.size (); // use size() if class becomes non-final
63          out.writeU2 (_interfaces_count);
64          
65          for (int i = 0; i < _interfaces_count; i++)
66          {
67              out.writeU2 (get (i));
68          }
69      }
70      
71      // Visitor:
72      
73      public void accept (final IClassDefVisitor visitor, final Object   ctx)
74      {
75          visitor.visit (this, ctx);
76      }
77      
78      
79      // MUTATORS:
80  
81      public int add (final int interface_index)
82      {
83          final int newoffset = m_interfaces.size (); // use size() if class becomes non-final
84          m_interfaces.add (interface_index);
85          
86          return newoffset;
87      }
88      
89      public int set (final int offset, final int interface_index)
90      {
91          return m_interfaces.set (offset, interface_index);
92      }
93      
94      // protected: .............................................................
95  
96      // package: ...............................................................
97  
98  
99      InterfaceCollection (final int capacity)
100     {
101         m_interfaces = capacity < 0 ? new IntVector () : new IntVector (capacity);
102     }
103 
104     // private: ...............................................................
105 
106     
107     private IntVector m_interfaces; // vector of constant pool indices
108     
109 } // end of class
110 // ----------------------------------------------------------------------------
111
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