/*

 * Copyright (c) 2007, 2008, 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 java.io.IOException;

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

/**

 * See JVMS, section 4.8.6.

 *

 *  <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 InnerClasses_attribute extends Attribute {

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

        super(name_index, length);

        number_of_classes = cr.readUnsignedShort();

        classes = new Info[number_of_classes];

        for (int i = 0; i < number_of_classes; i++)

            classes[i] = new Info(cr);

    }

    public InnerClasses_attribute(ConstantPool constant_pool, Info[] classes)

            throws ConstantPoolException {

        this(constant_pool.getUTF8Index(Attribute.InnerClasses), classes);

    }

    public InnerClasses_attribute(int name_index, Info[] classes) {

        super(name_index, 2 + Info.length() * classes.length);

        this.number_of_classes = classes.length;

        this.classes = classes;

    }

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

        return visitor.visitInnerClasses(this, data);

    }

    public final int number_of_classes;

    public final Info[] classes;

    public static class Info {

        Info(ClassReader cr) throws IOException {

            inner_class_info_index = cr.readUnsignedShort();

            outer_class_info_index = cr.readUnsignedShort();

            inner_name_index = cr.readUnsignedShort();

            inner_class_access_flags = new AccessFlags(cr.readUnsignedShort());

        }

        public Info(int inner_class_info_index, int outer_class_info_index, int inner_name_index, AccessFlags inner_class_access_flags) {

            this.inner_class_info_index = inner_class_info_index;

            this.outer_class_info_index = outer_class_info_index;

            this.inner_name_index = inner_name_index;

            this.inner_class_access_flags = inner_class_access_flags;

        }

        public CONSTANT_Class_info getInnerClassInfo(ConstantPool constant_pool) throws ConstantPoolException {

            if (inner_class_info_index == 0)

                return null;

            return constant_pool.getClassInfo(inner_class_info_index);

        }

        public CONSTANT_Class_info getOuterClassInfo(ConstantPool constant_pool) throws ConstantPoolException {

            if (outer_class_info_index == 0)

                return null;

            return constant_pool.getClassInfo(outer_class_info_index);

        }

        public String getInnerName(ConstantPool constant_pool) throws ConstantPoolException {

            if (inner_name_index == 0)

                return null;

            return constant_pool.getUTF8Value(inner_name_index);

        }

        public static int length() {

            return 8;

        }

        public final int inner_class_info_index;

        public final int outer_class_info_index;

        public final int inner_name_index;

        public final AccessFlags inner_class_access_flags;

    }

}