MethodCollection


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: MethodCollection.java,v 1.1.1.1 2004/05/09 16:57:47 vlad_r Exp $
8    */
9   package com.vladium.jcd.cls;
10  
11  import java.io.IOException  ;
12  import java.util.ArrayList  ;
13  import java.util.List  ;
14  
15  import com.vladium.jcd.lib.UDataOutputStream;
16  import com.vladium.util.IntVector;
17  
18  // ----------------------------------------------------------------------------
19  /**
20   * @author (C) 2001, Vlad Roubtsov
21   */
22  final class MethodCollection implements IMethodCollection
23  {
24      // public: ................................................................
25  
26      // ACCESSORS:
27          
28      public Method_info get (final int offset)
29      {
30          return (Method_info) m_methods.get (offset);
31      }
32      
33      public int [] get (final ClassDef cls, final String   name)
34      {
35          if (cls == null) throw new IllegalArgumentException    ("null input: cls");
36          
37          // TODO: hash impl [not possible without having access to the parent ClassDef]
38          
39          final int count = m_methods.size (); // use size() if class becomes non-final
40          final IntVector result = new IntVector (count);
41  
42          for (int m = 0; m < count; ++ m)
43          {
44              final Method_info method = (Method_info) m_methods.get (m);
45              
46              if (method.getName (cls).equals (name))  
47                  result.add (m);
48          }
49          
50          return result.values (); // IntVector optimizes for the empty case 
51      }
52      
53      public int size ()
54      {
55          return m_methods.size ();
56      }
57      
58      // Cloneable:
59      
60      /**
61       * Performs a deep copy.
62       */
63      public Object   clone ()
64      {
65          try
66          {
67              final MethodCollection _clone = (MethodCollection) super.clone ();
68              
69              // deep clone:
70              final int methods_count = m_methods.size (); // use size() if class becomes non-final
71              _clone.m_methods = new ArrayList   (methods_count);
72              for (int m = 0; m < methods_count; ++ m)
73              {
74                  _clone.m_methods.add (((Method_info) m_methods.get (m)).clone ());
75              }
76              
77              return _clone;
78          }
79          catch (CloneNotSupportedException   e)
80          {
81              throw new InternalError   (e.toString ());
82          }        
83      }
84      
85      // IClassFormatOutput:
86      
87      public void writeInClassFormat (final UDataOutputStream out) throws IOException  
88      {
89          final int methods_count = m_methods.size (); // use size() if class becomes non-final
90          out.writeU2 (methods_count);
91          
92          for (int i = 0; i < methods_count; i++)
93          {
94              get (i).writeInClassFormat (out);
95          }
96      }
97      
98      // Visitor:
99      
100     public void accept (final IClassDefVisitor visitor, final Object   ctx)
101     {
102         visitor.visit (this, ctx);
103     }
104     
105 
106     // MUTATORS:
107 
108     public int add (final Method_info method)
109     {
110         final int newoffset = m_methods.size ();  // use size() if class becomes non-final
111         m_methods.add (method);
112         
113         return newoffset;
114     }
115     
116     public Method_info set (final int offset, final Method_info method)
117     {
118         return (Method_info) m_methods.set (offset, method);
119     }
120     
121     public Method_info remove (final int offset)
122     {
123         return (Method_info) m_methods.remove (offset);
124     }
125     
126     // protected: .............................................................
127 
128     // package: ...............................................................
129 
130 
131     MethodCollection (final int capacity)
132     {
133         m_methods = capacity < 0 ? new ArrayList   () : new ArrayList   (capacity);
134     }
135 
136     // private: ...............................................................
137 
138     
139     private List  /* Method_info */ m_methods; // method collection
140 
141 } // end of class
142 // ----------------------------------------------------------------------------
143 
144
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