1 /*

     2  * Copyright (c) 2018, 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 com.sun.tools.classfile.ConstantPool.CONSTANT_Class_info;

    29 

    30 import java.io.IOException;

    31 import java.util.stream.IntStream;

    32 

    33 /**

    34  *  <p><b>This is NOT part of any supported API.

    35  *  If you write code that depends on this, you do so at your own risk.

    36  *  This code and its internal interfaces are subject to change or

    37  *  deletion without notice.</b>

    38  */

    39 public class NestMembers_attribute extends Attribute {

    40     NestMembers_attribute(ClassReader cr, int name_index, int length) throws IOException {

    41         super(name_index, length);

    42         int len = cr.readUnsignedShort();

    43         members_indexes = new int[len];

    44         for (int i = 0 ; i < len ; i++) {

    45             members_indexes[i] = cr.readUnsignedShort();

    46         }

    47     }

    48 

    49     public NestMembers_attribute(int name_index, int[] members_indexes) {

    50         super(name_index, 2);

    51         this.members_indexes = members_indexes;

    52     }

    53 

    54     public CONSTANT_Class_info[] getChildren(ConstantPool constant_pool) throws ConstantPoolException {

    55         return IntStream.of(members_indexes)

    56                 .mapToObj(i -> {

    57                     try {

    58                         return constant_pool.getClassInfo(i);

    59                     } catch (ConstantPoolException ex) {

    60                         throw new AssertionError(ex);

    61                     }

    62                 }).toArray(CONSTANT_Class_info[]::new);

    63     }

    64 

    65     public <R, D> R accept(Visitor<R, D> visitor, D data) {

    66         return visitor.visitNestMembers(this, data);

    67     }

    68 

    69     public final int[] members_indexes;

    70 }