1 /*
   2  * Copyright (c) 2015, 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 4.8.15.
  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 ModulePackages_attribute extends Attribute {
  39     ModulePackages_attribute(ClassReader cr, int name_index, int length)
  40             throws IOException {
  41         super(name_index, length);
  42         packages_count = cr.readUnsignedShort();
  43         packages_index = new int[packages_count];
  44         for (int i = 0; i < packages_count; i++)
  45             packages_index[i] = cr.readUnsignedShort();
  46     }
  47 
  48     public ModulePackages_attribute(ConstantPool constant_pool,
  49                               int[] packages_index)
  50             throws ConstantPoolException {
  51         this(constant_pool.getUTF8Index(Attribute.ModulePackages),
  52              packages_index);
  53     }
  54 
  55     public ModulePackages_attribute(int name_index,
  56                               int[] packages_index) {
  57         super(name_index, 2 + packages_index.length * 2);
  58         this.packages_count = packages_index.length;
  59         this.packages_index = packages_index;
  60     }
  61 
  62     public String getPackage(int index, ConstantPool constant_pool) throws ConstantPoolException {
  63         int package_index = packages_index[index];
  64         return constant_pool.getUTF8Value(package_index);
  65     }
  66 
  67     @Override
  68     public <R, D> R accept(Visitor<R, D> visitor, D data) {
  69         return visitor.visitModulePackages(this, data);
  70     }
  71 
  72     public final int packages_count;
  73     public final int[] packages_index;
  74 }