LocalVariableTable_attribute.java revision 2942:08092deced3f 
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
26package com.sun.tools.classfile;
27
28import 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 */
38public class LocalVariableTable_attribute extends Attribute {
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
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
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
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 {
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
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