Example usage for org.objectweb.asm.tree ClassNode ClassNode

Introduction

In this page you can find the example usage for org.objectweb.asm.tree ClassNode ClassNode.

Prototype

public ClassNode() 

Source Link

Document

Constructs a new ClassNode .

Usage

From source file:com.lion328.thaifixes.coremod.patcher.GuiChatBytecodePatcher.java

License:Open Source License

@Override
public byte[] patchClass(byte[] source) {
    if (ThaiFixesConfiguration.getFontStyle() != ThaiFixesFontStyle.MCPX)
        return source;

    ClassReader classReader = new ClassReader(source);
    ClassNode classNode = new ClassNode();
    classReader.accept(classNode, 0);//  w ww .  j  av  a  2 s  .  c om

    for (MethodNode method : classNode.methods) {
        boolean drawScreenFlag;
        if ((drawScreenFlag = (method.name.equals(CLASSMAP.getMethod("drawScreen"))
                && method.desc.equals("(IIF)V")))
                || (method.name.equals(CLASSMAP.getMethod("initGui")) && method.desc.equals("()V"))) {
            for (int i = 0; i < method.instructions.size(); i++) {
                if ((method.instructions.get(i).getOpcode() == Opcodes.BIPUSH)
                        && (method.instructions.get(i + 1).getOpcode() == Opcodes.ISUB)) {
                    IntInsnNode node = (IntInsnNode) method.instructions.get(i);
                    if (node.operand == (drawScreenFlag ? 14 : 12))
                        method.instructions.set(node,
                                new VarInsnNode(Opcodes.BIPUSH,
                                        (drawScreenFlag ? ThaiFixesFontRenderer.MCPX_CHATBLOCK_HEIGHT + 2
                                                : ThaiFixesFontRenderer.MCPX_CHATBLOCK_TEXT_YPOS + 2)));
                }
            }
        }
    }

    ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    classNode.accept(writer);
    return writer.toByteArray();
}

---

From source file:com.lion328.thaifixes.coremod.patcher.GuiNewChatBytecodePatcher.java

License:Open Source License

@Override
public byte[] patchClass(byte[] source) {
    if (ThaiFixesConfiguration.getFontStyle() != ThaiFixesFontStyle.MCPX)
        return source;

    ClassReader classReader = new ClassReader(source);
    ClassNode classNode = new ClassNode();
    classReader.accept(classNode, 0);/*from  w  ww.  ja v  a  2 s .c o  m*/

    for (MethodNode method : classNode.methods) {
        if (method.name.equals(CLASSMAP.getMethod("drawChat")) && method.desc.equals("(I)V")) {
            AbstractInsnNode currentNode = null;
            for (int i = 0; i < method.instructions.size(); i++) {
                currentNode = method.instructions.get(i);
                if (currentNode.getOpcode() == Opcodes.BIPUSH) {
                    if (method.instructions.get(i + 1).getOpcode() == Opcodes.IMUL)
                        method.instructions.set(currentNode,
                                new VarInsnNode(Opcodes.BIPUSH, ThaiFixesFontRenderer.MCPX_CHATBLOCK_HEIGHT));
                    else if (method.instructions.get(i + 1).getOpcode() == Opcodes.ISUB
                            && method.instructions.get(i - 1).getOpcode() == Opcodes.ILOAD) {
                        IntInsnNode node = (IntInsnNode) currentNode;
                        if (node.operand == 9)
                            method.instructions.set(currentNode, new VarInsnNode(Opcodes.BIPUSH,
                                    ThaiFixesFontRenderer.MCPX_CHATBLOCK_HEIGHT));
                        else if (node.operand == 8)
                            method.instructions.set(currentNode, new VarInsnNode(Opcodes.BIPUSH,
                                    ThaiFixesFontRenderer.MCPX_CHATBLOCK_TEXT_YPOS));
                    }
                }
            }
        } else if (method.name.equals(CLASSMAP.getMethod("func_146236_a"))
                && method.desc.equals("(II)L" + ClassMap.getClassMap("net.minecraft.util.IChatComponent")
                        .getClassInfo().getProductionClassName().replace('.', '/') + ";")) {
            for (int i = 0; i < method.instructions.size(); i++) {
                if (method.instructions.get(i).getOpcode() == Opcodes.GETFIELD) {
                    FieldInsnNode node = (FieldInsnNode) method.instructions.get(i);
                    if (node.owner.equals(ClassMap.getClassMap("net.minecraft.client.gui.FontRenderer")
                            .getClassInfo().getProductionClassName().replace('.', '/'))
                            && node.name.equals(ClassMap.getClassMap("net.minecraft.client.gui.FontRenderer")
                                    .getField("FONT_HEIGHT"))) {
                        method.instructions.set(node,
                                new VarInsnNode(Opcodes.BIPUSH, ThaiFixesFontRenderer.MCPX_CHATBLOCK_HEIGHT));
                        method.instructions.remove(method.instructions.get(i - 1)); // GETFIELD Minecraft.mc
                        method.instructions.remove(method.instructions.get(i - 2)); // GETFIELD GuiNewChat.mc
                        method.instructions.remove(method.instructions.get(i - 3)); // ALOAD 0
                    }
                }
            }
        }
    }

    ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    classNode.accept(writer);
    return writer.toByteArray();
}

---

From source file:com.lion328.xenonlauncher.patcher.StringReplaceFilePatcher.java

License:Open Source License

@Override
public byte[] patchFile(String name, byte[] original) {
    if (!name.endsWith(".class")) {
        return original;
    }/*from  w ww  . jav  a 2 s. c  o  m*/

    ClassReader reader = new ClassReader(original);
    ClassNode node = new ClassNode();
    reader.accept(node, 0);

    List fields = node.fields;
    FieldNode field;
    for (Object obj : fields) {
        if (!(obj instanceof FieldNode)) {
            continue;
        }

        field = (FieldNode) obj;

        if (field.value instanceof String) {
            field.value = ((String) field.value).replace(find, replace);
        }
    }

    List methods = node.methods;
    MethodNode method;
    for (Object obj : methods) {
        if (!(obj instanceof MethodNode)) {
            continue;
        }

        method = (MethodNode) obj;

        InsnList insns = method.instructions;

        for (int i = 0; i < insns.size(); i++) {
            AbstractInsnNode insn = insns.get(i);

            if (!(insn instanceof LdcInsnNode)) {
                continue;
            }

            LdcInsnNode ldc = (LdcInsnNode) insn;

            if (!(ldc.cst instanceof String)) {
                continue;
            }

            ldc.cst = ((String) ldc.cst).replace(find, replace);
        }
    }

    ClassWriter writer = new ClassWriter(0);
    node.accept(writer);

    return writer.toByteArray();
}

---

From source file:com.mebigfatguy.junitflood.generator.simple.SimpleGenerator.java

License:Apache License

private ClassNode parseClass(ClassPathItem item) throws IOException {
    try (InputStream is = item.getInputStream()) {
        ClassReader cr = new ClassReader(is);
        ClassNode node = new ClassNode();
        cr.accept(node, ClassReader.SKIP_CODE);
        return node;
    }/*from w ww . j  a va 2s .  c om*/
}

---

From source file:com.microsoft.Malmo.OverclockingClassTransformer.java

License:Open Source License

private static byte[] transform(byte[] serverClass, boolean isObfuscated, transformType type) {
    System.out.println("MALMO: Attempting to transform MinecraftServer");
    try {/*w  w  w.jav  a 2s  .  c  o m*/
        ClassNode cnode = new ClassNode();
        ClassReader creader = new ClassReader(serverClass);
        creader.accept(cnode, 0);

        switch (type) {
        case SERVER:
            overclockServer(cnode, isObfuscated);
            break;
        case RENDERER:
            overclockRenderer(cnode, isObfuscated);
            break;
        }

        ClassWriter cwriter = new ClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
        cnode.accept(cwriter);
        return cwriter.toByteArray();
    } catch (Exception e) {
        System.out.println("MALMO FAILED to transform MinecraftServer - overclocking not available!");
    }
    return serverClass;
}

---

From source file:com.mogujie.instantrun.IncrementalVisitor.java

License:Apache License

private static List<ClassNode> parseParents(ZipFile zipFile, final ClassNode classNode) throws IOException {
    List<ClassNode> parentNodes = new ArrayList<ClassNode>();
    String currentParentName = classNode.superName;

    while (currentParentName != null) {
        ZipEntry zipEntry = zipFile.getEntry(currentParentName + ".class");
        if (zipEntry != null) {
            InputStream parentFileClassReader = new BufferedInputStream(zipFile.getInputStream(zipEntry));
            ClassReader parentClassReader = new ClassReader(parentFileClassReader);
            ClassNode parentNode = new TransformAccessClassNode();
            parentClassReader.accept(parentNode, ClassReader.EXPAND_FRAMES);
            parentNodes.add(parentNode);
            currentParentName = parentNode.superName;
        } else {//  w ww  .ja  v  a 2 s .c  o  m
            // May need method information from outside of the current project. Thread local class reader
            // should be the one
            try {
                ClassReader parentClassReader = new ClassReader(Thread.currentThread().getContextClassLoader()
                        .getResourceAsStream(currentParentName + ".class"));
                ClassNode parentNode = new ClassNode();
                parentClassReader.accept(parentNode, ClassReader.EXPAND_FRAMES);
                parentNodes.add(parentNode);
                currentParentName = parentNode.superName;

            } catch (IOException e) {
                // Could not locate parent class. This is as far as we can go locating parents.
                return ImmutableList.of();
            }
        }
    }
    return parentNodes;
}

---

From source file:com.mtso.blazer.JavaUtil.java

License:Open Source License

public static String retrieveCanonicalNameFromClass(File classFile) throws FileNotFoundException, IOException {

    ClassNode classNode = new ClassNode();
    InputStream classFileInputStream = new FileInputStream(classFile);
    try {/* w w w . j  av  a2 s .  co  m*/
        ClassReader classReader = new ClassReader(classFileInputStream);
        classReader.accept((ClassVisitor) classNode, 0);
    } finally {
        classFileInputStream.close();
    }

    Type classType = Type.getObjectType(classNode.name);
    return classType.getClassName();
}

---

From source file:com.mtso.blazer.JavaUtil.java

License:Open Source License

public static ArrayList retrieveSignaturesFromClass(InputStream classFileIS, int signId) throws Exception {

    /*//www  . j  a  v  a  2 s.  c  om
     * Dynamic array containing multiple signatures arrays
     */
    ArrayList signatures = new ArrayList();

    Object[] signature = new Object[7];
    signature[0] = new Boolean(false); //used for signature selection

    ClassNode classNode = new ClassNode();
    InputStream classFileInputStream = classFileIS;
    try {
        ClassReader classReader = new ClassReader(classFileInputStream);
        classReader.accept((ClassVisitor) classNode, 0);
    } finally {
        classFileInputStream.close();
    }

    Type classType = Type.getObjectType(classNode.name);

    if ((classNode.access & Opcodes.ACC_PUBLIC) != 0) {

        if ((classNode.access & Opcodes.ACC_INTERFACE) != 0) {
            signature[2] = "Interface"; //interface
        } else {
            signature[2] = "Class"; //class
        }

        String name = classType.getClassName();
        name = name.substring(name.lastIndexOf('.') + 1); //packages are not required
        signature[3] = name.substring(0, 1).toLowerCase() + name.substring(1); //convert to javaCase
        @SuppressWarnings("unchecked")
        List<MethodNode> methodNodes = classNode.methods;

        for (MethodNode methodNode : methodNodes) {

            Type[] argumentTypes = Type.getArgumentTypes(methodNode.desc);

            if ((methodNode.access & Opcodes.ACC_PUBLIC) != 0) {

                signature[4] = methodNode.name;

                if (methodNode.visibleAnnotations != null) {

                    Iterator c = methodNode.visibleAnnotations.iterator();
                    while (c.hasNext()) {
                        AnnotationNode anode = (AnnotationNode) c.next();
                        String annotations = anode.desc;
                        annotations = annotations.substring(annotations.lastIndexOf('/') + 1,
                                annotations.lastIndexOf(';'));
                        signature[6] = "@".concat(annotations); //convert to standard format
                    }
                }

                StringBuilder pars = new StringBuilder();

                for (int i = 0; i < argumentTypes.length; i++) {

                    Type argumentType = argumentTypes[i];
                    if (i > 0) {
                        pars.append(", ");
                    }
                    pars.append(argumentType.getClassName());
                }

                signature[5] = pars.toString();

                /* list here all exceptions */
                if (!signature[4].equals("<init>")) {
                    signature[1] = new Integer(signId);
                    signatures.add(signature.clone());
                    signId++;
                }
                signature[5] = "";
            }
            signature[4] = "";
            signature[6] = "";
        }
    }
    return signatures;
}

---

From source file:com.navercorp.pinpoint.profiler.instrument.ASMAspectWeaverTest.java

License:Apache License

private Object getInstnace(final String originalName, final String aspectName) throws Exception {
    final ClassLoader defaultClassLoader = Thread.currentThread().getContextClassLoader();
    final ClassLoader classLoader = new ClassLoader() {
        @Override/*from   www.j  ava2 s  .c  o m*/
        public Class<?> loadClass(String name) throws ClassNotFoundException {
            if (name.equals(originalName)) {
                try {
                    final ClassReader cr = new ClassReader(
                            getClass().getResourceAsStream("/" + name.replace('.', '/') + ".class"));
                    final ClassNode classNode = new ClassNode();
                    cr.accept(classNode, 0);

                    final ASMClassNodeAdapter sourceClassNode = new ASMClassNodeAdapter(defaultClassLoader,
                            classNode);
                    final ASMClassNodeAdapter adviceClassNode = ASMClassNodeAdapter.get(defaultClassLoader,
                            aspectName.replace('.', '/'));

                    final ASMAspectWeaver aspectWeaver = new ASMAspectWeaver();
                    aspectWeaver.weaving(sourceClassNode, adviceClassNode);

                    final ClassWriter cw = new ClassWriter(0);
                    classNode.accept(cw);
                    final byte[] bytecode = cw.toByteArray();
                    CheckClassAdapter.verify(new ClassReader(bytecode), false, new PrintWriter(System.out));

                    return super.defineClass(name, bytecode, 0, bytecode.length);
                } catch (Exception ex) {
                    throw new ClassNotFoundException("Load error: " + ex.toString(), ex);
                }
            } else {
                return super.loadClass(name);
            }
        }
    };
    Class clazz = classLoader.loadClass(originalName);
    return clazz.newInstance();
}

---

From source file:com.navercorp.pinpoint.profiler.instrument.ASMClassNodeAdapter.java

License:Apache License

public static ASMClassNodeAdapter get(final ClassLoader classLoader, final String className,
        final boolean skipCode) {
    if (className == null) {
        throw new IllegalArgumentException("class name must not be null.");
    }//from   w  ww . j  a va  2  s  . c  o m

    ClassLoader aClassLoader = classLoader;
    if (aClassLoader == null) {
        // bootstrap class loader.
        aClassLoader = ClassLoader.getSystemClassLoader();
    }

    if (aClassLoader == null) {
        // not initialized system classloader.
        return null;
    }

    InputStream in = null;
    try {
        in = aClassLoader.getResourceAsStream(className + ".class");
        if (in != null) {
            final ClassReader classReader = new ClassReader(in);
            final ClassNode classNode = new ClassNode();
            if (skipCode) {
                classReader.accept(classNode, ClassReader.SKIP_CODE);
            } else {
                classReader.accept(classNode, 0);
            }

            return new ASMClassNodeAdapter(classLoader, classNode, skipCode);
        }
    } catch (IOException ignored) {
        // not found class.
    } finally {
        if (in != null) {
            try {
                in.close();
            } catch (IOException ignored) {
            }
        }
    }

    return null;
}

---

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