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 import com.sun.tools.classfile.ConstantPool.CONSTANT_Package_info;
  31 
  32 /**
  33  * See JVMS, section 4.8.15.
  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 ModulePackages_attribute extends Attribute {
  41     ModulePackages_attribute(ClassReader cr, int name_index, int length)
  42             throws IOException {
  43         super(name_index, length);
  44         packages_count = cr.readUnsignedShort();
  45         packages_index = new int[packages_count];
  46         for (int i = 0; i < packages_count; i++)
  47             packages_index[i] = cr.readUnsignedShort();
  48     }
  49 
  50     public ModulePackages_attribute(ConstantPool constant_pool,
  51                               int[] packages_index)
  52             throws ConstantPoolException {
  53         this(constant_pool.getUTF8Index(Attribute.ModulePackages),
  54              packages_index);
  55     }
  56 
  57     public ModulePackages_attribute(int name_index,
  58                               int[] packages_index) {
  59         super(name_index, 2 + packages_index.length * 2);
  60         this.packages_count = packages_index.length;
  61         this.packages_index = packages_index;
  62     }
  63 
  64     public String getPackage(int index, ConstantPool constant_pool) throws ConstantPoolException {
  65         int package_index = packages_index[index];
  66         CONSTANT_Package_info info = constant_pool.getPackageInfo(package_index);
  67         return info.getName();
  68     }
  69 
  70     @Override
  71     public <R, D> R accept(Visitor<R, D> visitor, D data) {
  72         return visitor.visitModulePackages(this, data);
  73     }
  74 
  75     public final int packages_count;
  76     public final int[] packages_index;
  77 }