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 {
  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 
  49     public InnerClasses_attribute(ConstantPool constant_pool, Info[] classes)
  50             throws ConstantPoolException {
  51         this(constant_pool.getUTF8Index(Attribute.InnerClasses), classes);
  52     }
  53 
  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 
  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 {
  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 
  75         public CONSTANT_Class_info getInnerClassInfo(ConstantPool constant_pool) throws ConstantPoolException {
  76             if (inner_class_info_index == 0)
  77                 return null;
  78             return constant_pool.getClassInfo(inner_class_info_index);
  79         }
  80 
  81         public CONSTANT_Class_info getOuterClassInfo(ConstantPool constant_pool) throws ConstantPoolException {
  82             if (outer_class_info_index == 0)
  83                 return null;
  84             return constant_pool.getClassInfo(outer_class_info_index);
  85         }
  86 
  87         public String getInnerName(ConstantPool constant_pool) throws ConstantPoolException {
  88             if (inner_name_index == 0)
  89                 return null;
  90             return constant_pool.getUTF8Value(inner_name_index);
  91         }
  92 
  93         public static int length() {
  94             return 8;
  95         }
  96 
  97         public final int inner_class_info_index;
  98         public final int outer_class_info_index;
  99         public final int inner_name_index;
 100         public final AccessFlags inner_class_access_flags;
 101     }
 102 }