src/share/classes/com/sun/tools/classfile/StackMap_attribute.java

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1 /*
2 * Copyright 2007 Sun Microsystems, Inc. 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. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 package com.sun.tools.classfile;
27
28 import java.io.IOException;
29
30 /**
31 * <p><b>This is NOT part of any API supported by Sun Microsystems. If
32 * you write code that depends on this, you do so at your own risk.
33 * This code and its internal interfaces are subject to change or
34 * deletion without notice.</b>
35 */
36 public class StackMap_attribute extends Attribute {
37 StackMap_attribute(ClassReader cr, int name_index, int length)
38 throws IOException, StackMapTable_attribute.InvalidStackMap {
39 super(name_index, length);
40 number_of_entries = cr.readUnsignedShort();
41 entries = new stack_map_frame[number_of_entries];
42 for (int i = 0; i < number_of_entries; i++)
43 entries[i] = new stack_map_frame(cr);
44 }
45
46 public StackMap_attribute(ConstantPool constant_pool, stack_map_frame[] entries)
47 throws ConstantPoolException {
48 this(constant_pool.getUTF8Index(Attribute.StackMap), entries);
49 }
50
51 public StackMap_attribute(int name_index, stack_map_frame[] entries) {
52 super(name_index, StackMapTable_attribute.length(entries));
53 this.number_of_entries = entries.length;
54 this.entries = entries;
55 }
56
57 public <R, D> R accept(Visitor<R, D> visitor, D data) {
58 return visitor.visitStackMap(this, data);
59 }
60
61 public final int number_of_entries;
62 public final stack_map_frame entries[];
63
64 public static class stack_map_frame extends StackMapTable_attribute.full_frame {
65 stack_map_frame(ClassReader cr)
66 throws IOException, StackMapTable_attribute.InvalidStackMap {
67 super(255, cr);
68 }
69 }
70 }

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