1 /*
2  * Copyright (c) 2007, 2008, Oracle and/or its affiliates. All rights reserved.
3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * This code is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License version 2 only, as
7  * published by the Free Software Foundation.  Oracle designates this
8  * particular file as subject to the "Classpath" exception as provided
9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22  * or visit www.oracle.com if you need additional information or have any
23  * questions.
24  */
25 
26 package com.sun.tools.classfile;
27 
28 import java.io.IOException;
29 
30 /**
31  * See JVMS, section 4.8.13.
32  *
33  *  <p><b>This is NOT part of any supported API.
34  *  If you write code that depends on this, you do so at your own risk.
35  *  This code and its internal interfaces are subject to change or
36  *  deletion without notice.</b>
37  */
38 public class LocalVariableTable_attribute extends Attribute {
LocalVariableTable_attribute(ClassReader cr, int name_index, int length)39     LocalVariableTable_attribute(ClassReader cr, int name_index, int length) throws IOException {
40         super(name_index, length);
41         local_variable_table_length = cr.readUnsignedShort();
42         local_variable_table = new Entry[local_variable_table_length];
43         for (int i = 0; i < local_variable_table_length; i++)
44             local_variable_table[i] = new Entry(cr);
45     }
46 
LocalVariableTable_attribute(ConstantPool constant_pool, Entry[] local_variable_table)47     public LocalVariableTable_attribute(ConstantPool constant_pool, Entry[] local_variable_table)
48             throws ConstantPoolException {
49         this(constant_pool.getUTF8Index(Attribute.LocalVariableTable), local_variable_table);
50     }
51 
LocalVariableTable_attribute(int name_index, Entry[] local_variable_table)52     public LocalVariableTable_attribute(int name_index, Entry[] local_variable_table) {
53         super(name_index, 2 + local_variable_table.length * Entry.length());
54         this.local_variable_table_length = local_variable_table.length;
55         this.local_variable_table = local_variable_table;
56     }
57 
accept(Visitor<R, D> visitor, D data)58     public <R, D> R accept(Visitor<R, D> visitor, D data) {
59         return visitor.visitLocalVariableTable(this, data);
60     }
61 
62     public final int local_variable_table_length;
63     public final Entry[] local_variable_table;
64 
65     public static class Entry {
Entry(ClassReader cr)66         Entry(ClassReader cr) throws IOException {
67             start_pc = cr.readUnsignedShort();
68             length = cr.readUnsignedShort();
69             name_index = cr.readUnsignedShort();
70             descriptor_index = cr.readUnsignedShort();
71             index = cr.readUnsignedShort();
72         }
73 
length()74         public static int length() {
75             return 10;
76         }
77 
78         public final int start_pc;
79         public final int length;
80         public final int name_index;
81         public final int descriptor_index;
82         public final int index;
83     }
84 }
85