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 import com.sun.tools.classfile.ConstantPool.*;
31 
32 /**
33  * See JVMS, section 4.8.6.
34  *
35  *  <p><b>This is NOT part of any supported API.
36  *  If you write code that depends on this, you do so at your own risk.
37  *  This code and its internal interfaces are subject to change or
38  *  deletion without notice.</b>
39  */
40 public class InnerClasses_attribute extends Attribute {
InnerClasses_attribute(ClassReader cr, int name_index, int length)41     InnerClasses_attribute(ClassReader cr, int name_index, int length) throws IOException {
42         super(name_index, length);
43         number_of_classes = cr.readUnsignedShort();
44         classes = new Info[number_of_classes];
45         for (int i = 0; i < number_of_classes; i++)
46             classes[i] = new Info(cr);
47     }
48 
InnerClasses_attribute(ConstantPool constant_pool, Info[] classes)49     public InnerClasses_attribute(ConstantPool constant_pool, Info[] classes)
50             throws ConstantPoolException {
51         this(constant_pool.getUTF8Index(Attribute.InnerClasses), classes);
52     }
53 
InnerClasses_attribute(int name_index, Info[] classes)54     public InnerClasses_attribute(int name_index, Info[] classes) {
55         super(name_index, 2 + Info.length() * classes.length);
56         this.number_of_classes = classes.length;
57         this.classes = classes;
58     }
59 
accept(Visitor<R, D> visitor, D data)60     public <R, D> R accept(Visitor<R, D> visitor, D data) {
61         return visitor.visitInnerClasses(this, data);
62     }
63 
64     public final int number_of_classes;
65     public final Info[] classes;
66 
67     public static class Info {
Info(ClassReader cr)68         Info(ClassReader cr) throws IOException {
69             inner_class_info_index = cr.readUnsignedShort();
70             outer_class_info_index = cr.readUnsignedShort();
71             inner_name_index = cr.readUnsignedShort();
72             inner_class_access_flags = new AccessFlags(cr.readUnsignedShort());
73         }
74 
Info(int inner_class_info_index, int outer_class_info_index, int inner_name_index, AccessFlags inner_class_access_flags)75         public Info(int inner_class_info_index, int outer_class_info_index, int inner_name_index, AccessFlags inner_class_access_flags) {
76             this.inner_class_info_index = inner_class_info_index;
77             this.outer_class_info_index = outer_class_info_index;
78             this.inner_name_index = inner_name_index;
79             this.inner_class_access_flags = inner_class_access_flags;
80         }
81 
getInnerClassInfo(ConstantPool constant_pool)82         public CONSTANT_Class_info getInnerClassInfo(ConstantPool constant_pool) throws ConstantPoolException {
83             if (inner_class_info_index == 0)
84                 return null;
85             return constant_pool.getClassInfo(inner_class_info_index);
86         }
87 
getOuterClassInfo(ConstantPool constant_pool)88         public CONSTANT_Class_info getOuterClassInfo(ConstantPool constant_pool) throws ConstantPoolException {
89             if (outer_class_info_index == 0)
90                 return null;
91             return constant_pool.getClassInfo(outer_class_info_index);
92         }
93 
getInnerName(ConstantPool constant_pool)94         public String getInnerName(ConstantPool constant_pool) throws ConstantPoolException {
95             if (inner_name_index == 0)
96                 return null;
97             return constant_pool.getUTF8Value(inner_name_index);
98         }
99 
length()100         public static int length() {
101             return 8;
102         }
103 
104         public final int inner_class_info_index;
105         public final int outer_class_info_index;
106         public final int inner_name_index;
107         public final AccessFlags inner_class_access_flags;
108     }
109 }
110