1 /*
   2  * Copyright (c) 2012, 2013, 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 MethodParameters_attribute extends Attribute {
  39 
  40     public final int method_parameter_table_length;
  41     public final Entry[] method_parameter_table;
  42 
  43     MethodParameters_attribute(ClassReader cr,
  44                               int name_index,
  45                               int length)
  46         throws IOException {
  47         super(name_index, length);
  48 
  49         method_parameter_table_length = cr.readUnsignedByte();
  50         method_parameter_table = new Entry[method_parameter_table_length];
  51         for (int i = 0; i < method_parameter_table_length; i++)
  52             method_parameter_table[i] = new Entry(cr);
  53     }
  54 
  55     public MethodParameters_attribute(ConstantPool constant_pool,
  56                                       Entry[] method_parameter_table)
  57         throws ConstantPoolException {
  58         this(constant_pool.getUTF8Index(Attribute.MethodParameters),
  59              method_parameter_table);
  60     }
  61 
  62     public MethodParameters_attribute(int name_index,
  63                                       Entry[] method_parameter_table) {
  64         super(name_index, 1 + method_parameter_table.length * Entry.length());
  65         this.method_parameter_table_length = method_parameter_table.length;
  66         this.method_parameter_table = method_parameter_table;
  67     }
  68 
  69     public <R, D> R accept(Visitor<R, D> visitor, D data) {
  70         return visitor.visitMethodParameters(this, data);
  71     }
  72 
  73     public static class Entry {
  74         Entry(ClassReader cr) throws IOException {
  75             name_index = cr.readUnsignedShort();
  76             flags = cr.readUnsignedShort();
  77         }
  78 
  79         public static int length() {
  80             return 6;
  81         }
  82 
  83         public final int name_index;
  84         public final int flags;
  85     }
  86 
  87 }