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ProGuard is a free shrinker, optimizer, obfuscator, and preverifier for Java bytecode

There is a newer version: 7.6.0

/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification
 *             of Java bytecode.
 *
 * Copyright (c) 2002-2020 Guardsquare NV
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program 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 for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.obfuscate.kotlin;

import proguard.classfile.Clazz;
import proguard.classfile.kotlin.*;
import proguard.classfile.kotlin.visitor.KotlinTypeVisitor;
import proguard.classfile.util.ClassUtil;

public class KotlinAliasReferenceFixer
implements KotlinTypeVisitor
{

    // Implementations for KotlinTypeVisitor.

    @Override
    public void visitAnyType(Clazz clazz, KotlinTypeMetadata kotlinTypeMetadata)
    {
        if (kotlinTypeMetadata.aliasName != null)
        {
            String newName;

            if (kotlinTypeMetadata.referencedTypeAlias.referencedDeclarationContainer.k == KotlinConstants.METADATA_KIND_CLASS)
            {
                // Type alias declared within a class.
                // Inner classes in Kotlin metadata have a '.' separator instead of the standard '$'.
                newName = ((KotlinClassKindMetadata)kotlinTypeMetadata.referencedTypeAlias.referencedDeclarationContainer).className + "." +
                          kotlinTypeMetadata.referencedTypeAlias.name;
            }
            else
            {
                // Top-level alias declaration.
                // Package is that of the file facade (which is a declaration container).
                newName =
                    ClassUtil.internalPackagePrefix(kotlinTypeMetadata.referencedTypeAlias.referencedDeclarationContainer.ownerClassName) +
                    kotlinTypeMetadata.referencedTypeAlias.name;
            }

            kotlinTypeMetadata.aliasName = newName;
        }
    }
}