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      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