tk.wurst_client.hooks.injector.ClassHookInjector.java Source code

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Here is the source code for tk.wurst_client.hooks.injector.ClassHookInjector.java

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/*
 * Copyright  2015 | Alexander01998 | All rights reserved.
 * 
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
package tk.wurst_client.hooks.injector;

import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.FieldVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;

import tk.wurst_client.hooks.reader.data.ClassData;

public class ClassHookInjector extends ClassVisitor {
    private int api;
    private String className;
    private ClassData classData;

    public ClassHookInjector(int api, ClassVisitor cv, ClassData classData) {
        super(api, cv);
        this.api = api;
        this.classData = classData;
    }

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

    @Override
    public FieldVisitor visitField(int access, String name, String desc, String signature, Object value) {
        access = access & ~Opcodes.ACC_PRIVATE & ~Opcodes.ACC_PROTECTED | Opcodes.ACC_PUBLIC;
        return super.visitField(access, name, desc, signature, value);
    }

    @Override
    public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
        access = access & ~Opcodes.ACC_PRIVATE & ~Opcodes.ACC_PROTECTED | Opcodes.ACC_PUBLIC;
        MethodVisitor mv = super.visitMethod(access, name, desc, signature, exceptions);
        if (classData.hasHooks() && classData.getMethod(name + desc).hasHooks())
            return new MethodHookInjector(api, mv, classData.getMethod(name + desc), className, name + desc);
        else
            return mv;
    }
}