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Java > Open Source Codes > com > vladium > jcd > cls > attribute > ExceptionHandlerTable


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: ExceptionHandlerTable.java,v 1.1.1.1 2004/05/09 16:57:47 vlad_r Exp $
8  */
9 package com.vladium.jcd.cls.attribute;
10
11 import java.io.IOException JavaDoc;
12 import java.util.ArrayList JavaDoc;
13 import java.util.List JavaDoc;
14
15 import com.vladium.jcd.lib.UDataOutputStream;
16
17 // ----------------------------------------------------------------------------
18 /**
19  * @author (C) 2001, Vlad Roubtsov
20  */
21 final class ExceptionHandlerTable implements IExceptionHandlerTable
22 {
23     // public: ................................................................
24
25     // ACCESSORS:
26
27     public Exception_info get (final int offset)
28     {
29         return (Exception_info) m_exceptions.get (offset);
30     }
31     
32     public int size ()
33     {
34         return m_exceptions.size ();
35     }
36     
37     public long length ()
38     {
39         return 2 + (m_exceptions.size () << 3); // use size() if class becomes non-final
40 }
41         
42     // Cloneable:
43
44     /**
45      * Performs a deep copy.
46      */
47     public Object JavaDoc clone ()
48     {
49         try
50         {
51             final ExceptionHandlerTable _clone = (ExceptionHandlerTable) super.clone ();
52             
53             // deep clone:
54 final int exceptions_count = m_exceptions.size (); // use size() if class becomes non-final
55 _clone.m_exceptions = new ArrayList JavaDoc (exceptions_count);
56             for (int e = 0; e < exceptions_count; ++ e)
57             {
58                 _clone.m_exceptions.add (((Exception_info) m_exceptions.get (e)).clone ());
59             }
60             
61             return _clone;
62         }
63         catch (CloneNotSupportedException JavaDoc e)
64         {
65             throw new InternalError JavaDoc (e.toString ());
66         }
67     }
68     
69     // IClassFormatOutput:
70
71     public void writeInClassFormat (final UDataOutputStream out) throws IOException JavaDoc
72     {
73         int exception_table_length = m_exceptions.size (); // use size() if class becomes non-final
74 out.writeU2 (exception_table_length);
75         
76         for (int i = 0; i < exception_table_length; i++)
77         {
78             get (i).writeInClassFormat (out);
79         }
80     }
81
82
83     // MUTATORS:
84
85     public int add (final Exception_info exception)
86     {
87         final int newoffset = m_exceptions.size (); // use size() if class becomes non-final
88 m_exceptions.add (exception);
89         
90         return newoffset;
91     }
92     
93     public Exception_info set (final int offset, final Exception_info exception)
94     {
95         return (Exception_info) m_exceptions.set (offset, exception);
96     }
97     
98     // protected: .............................................................
99
100     // package: ...............................................................
101
102
103     ExceptionHandlerTable (final int capacity)
104     {
105         m_exceptions = capacity < 0 ? new ArrayList JavaDoc () : new ArrayList JavaDoc (capacity);
106     }
107
108     // private: ...............................................................
109
110
111     private List JavaDoc/* Exception_info */ m_exceptions;
112     
113 } // end of class
114 // ----------------------------------------------------------------------------
115
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