/*

 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package com.sun.tools.classfile;

import com.sun.tools.classfile.ConstantPool.CONSTANT_Class_info;

import java.io.IOException;

import java.util.stream.IntStream;

/**

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

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

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

 *  deletion without notice.</b>

 */

public class NestMembers_attribute extends Attribute {

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

        super(name_index, length);

        int len = cr.readUnsignedShort();

        members_indexes = new int[len];

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

            members_indexes[i] = cr.readUnsignedShort();

        }

    }

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

        super(name_index, 2);

        this.members_indexes = members_indexes;

    }

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

        return IntStream.of(members_indexes)

                .mapToObj(i -> {

                    try {

                        return constant_pool.getClassInfo(i);

                    } catch (ConstantPoolException ex) {

                        throw new AssertionError(ex);

                    }

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

    }

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

        return visitor.visitNestMembers(this, data);

    }

    public final int[] members_indexes;

}