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
26package com.sun.tools.classfile;
27
28import java.io.IOException;
29
30import 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 */
40public 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}
78