net.fabricmc.loader.transformer.PublicAccessTransformer.java Source code

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Here is the source code for net.fabricmc.loader.transformer.PublicAccessTransformer.java

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/*
 * Copyright 2016 FabricMC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package net.fabricmc.loader.transformer;

import net.minecraft.launchwrapper.IClassTransformer;
import org.objectweb.asm.*;
import org.objectweb.asm.tree.ClassNode;
import org.objectweb.asm.tree.FieldNode;
import org.objectweb.asm.tree.MethodNode;

public class PublicAccessTransformer implements IClassTransformer {
    static class AccessClassVisitor extends ClassVisitor {
        public AccessClassVisitor(int api, ClassVisitor classVisitor) {
            super(api, classVisitor);
        }

        @Override
        public void visit(final int version, final int access, final String name, final String signature,
                final String superName, final String[] interfaces) {
            super.visit(version, (access & (~0x7)) | Opcodes.ACC_PUBLIC, name, signature, superName, interfaces);
        }

        @Override
        public void visitInnerClass(final String name, final String outerName, final String innerName,
                final int access) {
            super.visitInnerClass(name, outerName, innerName, (access & (~0x7)) | Opcodes.ACC_PUBLIC);
        }

        @Override
        public FieldVisitor visitField(final int access, final String name, final String descriptor,
                final String signature, final Object value) {
            return super.visitField((access & (~0x7)) | Opcodes.ACC_PUBLIC, name, descriptor, signature, value);
        }

        @Override
        public MethodVisitor visitMethod(final int access, final String name, final String descriptor,
                final String signature, final String[] exceptions) {
            return super.visitMethod((access & (~0x7)) | Opcodes.ACC_PUBLIC, name, descriptor, signature,
                    exceptions);
        }
    }

    @Override
    public byte[] transform(String name, String transformedName, byte[] bytes) {
        if (!name.startsWith("net.minecraft") && name.contains(".")) {
            return bytes;
        }
        ClassReader classReader = new ClassReader(bytes);
        ClassWriter classWriter = new ClassWriter(0);
        classReader.accept(new AccessClassVisitor(Opcodes.ASM6, classWriter), 0);
        return classWriter.toByteArray();
    }
}