Example usage for org.objectweb.asm MethodVisitor visitParameter

Introduction

In this page you can find the example usage for org.objectweb.asm MethodVisitor visitParameter.

Prototype

public void visitParameter(final String name, final int access) 

Source Link

Document

Visits a parameter of this method.

Usage

From source file:com.gmail.socraticphoenix.nebula.event.wrappers.BytecodeEventListenerGeneration.java

License:Open Source License

public static String listener(EventListener eventListener, Class eventClass, Object listener, Method method,
        ClassVisitor visitor) {/*from w w  w.j  av  a 2s . c om*/
    Type listenerType = Type.getType(listener.getClass());
    Type eventType = Type.getType(eventClass);
    String internalImplName = listenerType.getInternalName() + "$listener$" + method.getName() + "$"
            + BytecodeEventListenerGeneration.index++;

    visitor.visit(V1_8, ACC_PUBLIC | ACC_SYNTHETIC | ACC_FINAL, internalImplName, null,
            BytecodeEventListenerGeneration.objectType.getInternalName(),
            new String[] { BytecodeEventListenerGeneration.eventWrapperType.getInternalName() });
    visitor.visitField(ACC_PRIVATE | ACC_FINAL, "listener", listenerType.getDescriptor(), null, null)
            .visitEnd();

    MethodVisitor constructor = visitor.visitMethod(ACC_PUBLIC, "<init>",
            Type.getMethodDescriptor(Type.VOID_TYPE, listenerType), null, null);
    constructor.visitParameter("listener", ACC_FINAL);
    constructor.visitCode();
    constructor.visitVarInsn(ALOAD, 0);
    constructor.visitMethodInsn(INVOKESPECIAL, BytecodeEventListenerGeneration.objectType.getInternalName(),
            "<init>", Type.getMethodDescriptor(Type.VOID_TYPE), false);
    constructor.visitVarInsn(ALOAD, 0);
    constructor.visitVarInsn(ALOAD, 1);
    constructor.visitFieldInsn(PUTFIELD, internalImplName, "listener", listenerType.getDescriptor());
    constructor.visitInsn(RETURN);
    constructor.visitMaxs(0, 0);
    constructor.visitEnd();

    MethodVisitor priority = visitor.visitMethod(ACC_PUBLIC | ACC_FINAL, "priority",
            BytecodeEventListenerGeneration.priorityMethod.getDescriptor(), null, null);
    priority.visitCode();
    priority.visitLdcInsn(eventListener.value());
    priority.visitInsn(IRETURN);
    priority.visitMaxs(0, 0);
    priority.visitEnd();

    MethodVisitor getListener = visitor.visitMethod(ACC_PUBLIC | ACC_FINAL, "listener",
            BytecodeEventListenerGeneration.listenerMethod.getDescriptor(), null, null);
    getListener.visitVarInsn(ALOAD, 0);
    getListener.visitFieldInsn(GETFIELD, internalImplName, "listener", listenerType.getDescriptor());
    getListener.visitInsn(ARETURN);
    getListener.visitMaxs(0, 0);
    getListener.visitEnd();

    MethodVisitor event = visitor.visitMethod(ACC_PUBLIC | ACC_FINAL, "mainEvent",
            BytecodeEventListenerGeneration.mainEventMethod.getDescriptor(), null, null);
    event.visitCode();
    event.visitLdcInsn(eventType);
    event.visitInsn(ARETURN);
    event.visitMaxs(0, 0);
    event.visitEnd();

    return internalImplName;
}

---

From source file:com.gmail.socraticphoenix.occurence.wrappers.BytecodeEventListenerGeneration.java

License:Open Source License

public static String listener(EventListener eventListener, Class eventClass, Object listener, Method method,
        ClassVisitor visitor) {/*from   ww  w  .j  a  va 2 s.  c o  m*/
    Type listenerType = Type.getType(listener.getClass());
    Type eventType = Type.getType(eventClass);
    String internalImplName = listenerType.getInternalName() + "$listener$" + method.getName() + "$"
            + BytecodeEventListenerGeneration.index++;
    String simpleName = listener.getClass().getName() + "#" + method.getName() + "("
            + Stream.of(method.getParameters()).map(p -> p.getType().getSimpleName())
                    .reduce((a, b) -> a + ", " + b).orElse("")
            + ")";

    visitor.visit(V1_8, ACC_PUBLIC | ACC_SYNTHETIC | ACC_FINAL, internalImplName, null,
            BytecodeEventListenerGeneration.objectType.getInternalName(),
            new String[] { BytecodeEventListenerGeneration.eventWrapperType.getInternalName() });
    visitor.visitField(ACC_PRIVATE | ACC_FINAL, "listener", listenerType.getDescriptor(), null, null)
            .visitEnd();

    MethodVisitor constructor = visitor.visitMethod(ACC_PUBLIC, "<init>",
            Type.getMethodDescriptor(Type.VOID_TYPE, Type.getType(Object.class)), null, null);
    constructor.visitParameter("listener", ACC_FINAL);
    constructor.visitCode();
    constructor.visitVarInsn(ALOAD, 0);
    constructor.visitMethodInsn(INVOKESPECIAL, BytecodeEventListenerGeneration.objectType.getInternalName(),
            "<init>", Type.getMethodDescriptor(Type.VOID_TYPE), false);
    constructor.visitVarInsn(ALOAD, 0);
    constructor.visitVarInsn(ALOAD, 1);
    constructor.visitTypeInsn(CHECKCAST, listenerType.getInternalName());
    constructor.visitFieldInsn(PUTFIELD, internalImplName, "listener", listenerType.getDescriptor());
    constructor.visitInsn(RETURN);
    constructor.visitMaxs(0, 0);
    constructor.visitEnd();

    MethodVisitor name = visitor.visitMethod(ACC_PUBLIC, "name",
            Type.getMethodDescriptor(Type.getType(String.class)), null, null);
    name.visitLdcInsn(simpleName);
    name.visitInsn(ARETURN);
    name.visitMaxs(0, 0);
    name.visitEnd();

    MethodVisitor priority = visitor.visitMethod(ACC_PUBLIC | ACC_FINAL, "priority",
            BytecodeEventListenerGeneration.priorityMethod.getDescriptor(), null, null);
    priority.visitCode();
    priority.visitLdcInsn(eventListener.value());
    priority.visitInsn(IRETURN);
    priority.visitMaxs(0, 0);
    priority.visitEnd();

    MethodVisitor getListener = visitor.visitMethod(ACC_PUBLIC | ACC_FINAL, "listener",
            BytecodeEventListenerGeneration.listenerMethod.getDescriptor(), null, null);
    getListener.visitVarInsn(ALOAD, 0);
    getListener.visitFieldInsn(GETFIELD, internalImplName, "listener", listenerType.getDescriptor());
    getListener.visitInsn(ARETURN);
    getListener.visitMaxs(0, 0);
    getListener.visitEnd();

    MethodVisitor event = visitor.visitMethod(ACC_PUBLIC | ACC_FINAL, "mainEvent",
            BytecodeEventListenerGeneration.mainEventMethod.getDescriptor(), null, null);
    event.visitCode();
    event.visitLdcInsn(eventType);
    event.visitInsn(ARETURN);
    event.visitMaxs(0, 0);
    event.visitEnd();

    return internalImplName;
}

---

From source file:com.google.devtools.build.android.desugar.Bug62060793TestDataGenerator.java

License:Open Source License

private static byte[] createClass() {
    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    MethodVisitor mv;
    cw.visit(V1_8, ACC_PUBLIC | ACC_SUPER, CLASS_NAME, null, "java/lang/Object", null);

    cw.visitInnerClass(INTERFACE_TYPE_NAME, CLASS_NAME, "Interface",
            ACC_PUBLIC | ACC_STATIC | ACC_ABSTRACT | ACC_INTERFACE);

    cw.visitInnerClass("java/lang/invoke/MethodHandles$Lookup", "java/lang/invoke/MethodHandles", "Lookup",
            ACC_PUBLIC | ACC_FINAL | ACC_STATIC);

    {/*from   w ww  .  j av a2  s . c om*/
        mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
        mv.visitInsn(RETURN);
        mv.visitEnd();
    }
    {
        mv = cw.visitMethod(ACC_PRIVATE | ACC_STATIC, "method", "(Ljava/lang/String;)Ljava/lang/String;", null,
                null);
        mv.visitParameter("str", 0);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitInsn(ARETURN);
        mv.visitEnd();
    }
    {
        mv = cw.visitMethod(ACC_PRIVATE | ACC_STATIC, "method",
                "(ZCBFDJISLjava/lang/Object;[Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/String;", null,
                null);
        mv.visitParameter("bool", 0);
        mv.visitParameter("c", 0);
        mv.visitParameter("b", 0);
        mv.visitParameter("f", 0);
        mv.visitParameter("d", 0);
        mv.visitParameter("l", 0);
        mv.visitParameter("i", 0);
        mv.visitParameter("s", 0);
        mv.visitParameter("o", 0);
        mv.visitParameter("array", 0);
        mv.visitParameter("str", 0);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 10);
        mv.visitMethodInsn(INVOKESTATIC, "java/lang/String", "valueOf",
                "(Ljava/lang/Object;)Ljava/lang/String;", false);
        mv.visitVarInsn(ASTORE, 13);
        mv.visitVarInsn(ALOAD, 11);
        Label l0 = new Label();
        mv.visitJumpInsn(IFNONNULL, l0);
        mv.visitInsn(ICONST_1);
        Label l1 = new Label();
        mv.visitJumpInsn(GOTO, l1);
        mv.visitLabel(l0);
        mv.visitFrame(Opcodes.F_APPEND, 1, new Object[] { "java/lang/String" }, 0, null);
        mv.visitInsn(ICONST_0);
        mv.visitLabel(l1);
        mv.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] { Opcodes.INTEGER });
        mv.visitVarInsn(ISTORE, 14);
        mv.visitIntInsn(BIPUSH, 91);
        mv.visitVarInsn(ALOAD, 12);
        mv.visitMethodInsn(INVOKESTATIC, "java/lang/String", "valueOf",
                "(Ljava/lang/Object;)Ljava/lang/String;", false);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "length", "()I", false);
        mv.visitInsn(IADD);
        mv.visitVarInsn(ALOAD, 13);
        mv.visitMethodInsn(INVOKESTATIC, "java/lang/String", "valueOf",
                "(Ljava/lang/Object;)Ljava/lang/String;", false);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "length", "()I", false);
        mv.visitInsn(IADD);
        mv.visitTypeInsn(NEW, "java/lang/StringBuilder");
        mv.visitInsn(DUP_X1);
        mv.visitInsn(SWAP);
        mv.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "(I)V", false);
        mv.visitVarInsn(ALOAD, 12);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
                "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
        mv.visitVarInsn(ILOAD, 0);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Z)Ljava/lang/StringBuilder;",
                false);
        mv.visitVarInsn(ILOAD, 1);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(C)Ljava/lang/StringBuilder;",
                false);
        mv.visitVarInsn(ILOAD, 2);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(I)Ljava/lang/StringBuilder;",
                false);
        mv.visitVarInsn(FLOAD, 3);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(F)Ljava/lang/StringBuilder;",
                false);
        mv.visitVarInsn(DLOAD, 4);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(D)Ljava/lang/StringBuilder;",
                false);
        mv.visitVarInsn(LLOAD, 6);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(J)Ljava/lang/StringBuilder;",
                false);
        mv.visitVarInsn(ILOAD, 8);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(I)Ljava/lang/StringBuilder;",
                false);
        mv.visitVarInsn(ILOAD, 9);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(I)Ljava/lang/StringBuilder;",
                false);
        mv.visitVarInsn(ALOAD, 13);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
                "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
        mv.visitVarInsn(ILOAD, 14);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Z)Ljava/lang/StringBuilder;",
                false);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;", false);
        mv.visitInsn(ARETURN);
        mv.visitEnd();
    }
    {
        mv = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "lambdaWithConstantArguments",
                "()L" + INTERFACE_TYPE_NAME + ";", null, null);
        mv.visitCode();
        mv.visitInsn(ICONST_0);
        mv.visitInsn(ICONST_1);
        mv.visitInsn(ICONST_2);
        mv.visitInsn(FCONST_0);
        mv.visitInsn(DCONST_0);
        mv.visitInsn(LCONST_0);
        mv.visitInsn(ICONST_4);
        mv.visitIntInsn(SIPUSH, 9);
        mv.visitInsn(ACONST_NULL);
        mv.visitInsn(ACONST_NULL);
        mv.visitInvokeDynamicInsn("call",
                "(ZCBFDJISLjava/lang/Object;[Ljava/lang/Object;)L" + INTERFACE_TYPE_NAME + ";",
                new Handle(Opcodes.H_INVOKESTATIC, "java/lang/invoke/LambdaMetafactory", "metafactory",
                        "(Ljava/lang/invoke/MethodHandles$Lookup;"
                                + "Ljava/lang/String;Ljava/lang/invoke/MethodType;"
                                + "Ljava/lang/invoke/MethodType;" + "Ljava/lang/invoke/MethodHandle;"
                                + "Ljava/lang/invoke/MethodType;" + ")Ljava/lang/invoke/CallSite;",
                        false),
                new Object[] { Type.getType("(Ljava/lang/String;)Ljava/lang/String;"),
                        new Handle(Opcodes.H_INVOKESTATIC, CLASS_NAME, "method",
                                "(ZCBFDJISLjava/lang/Object;[Ljava/lang/Object;Ljava/lang/String;"
                                        + ")Ljava/lang/String;",
                                false),
                        Type.getType("(Ljava/lang/String;)Ljava/lang/String;") });
        mv.visitInsn(ARETURN);
        mv.visitEnd();
    }

    cw.visitEnd();

    return cw.toByteArray();
}

---

From source file:com.google.devtools.build.android.desugar.Bug62060793TestDataGenerator.java

License:Open Source License

private static byte[] createInterface() {
    ClassWriter cw = new ClassWriter(0);
    MethodVisitor mv;

    cw.visit(V1_8, ACC_PUBLIC | ACC_ABSTRACT | ACC_INTERFACE, INTERFACE_TYPE_NAME, null, "java/lang/Object",
            null);//from w  w w .  j a v  a  2s.c o  m

    cw.visitInnerClass(INTERFACE_TYPE_NAME, CLASS_NAME, "Interface",
            ACC_PUBLIC | ACC_STATIC | ACC_ABSTRACT | ACC_INTERFACE);

    {
        mv = cw.visitMethod(ACC_PUBLIC | ACC_ABSTRACT, "call", "(Ljava/lang/String;)Ljava/lang/String;", null,
                null);
        mv.visitParameter("input", 0);
        mv.visitEnd();
    }
    cw.visitEnd();

    return cw.toByteArray();

}

---

From source file:org.codehaus.groovy.classgen.AsmClassGenerator.java

License:Apache License

@Override
protected void visitConstructorOrMethod(final MethodNode node, final boolean isConstructor) {
    controller.resetLineNumber();//  www.ja  v  a 2s.  co  m
    Parameter[] parameters = node.getParameters();
    String methodType = BytecodeHelper.getMethodDescriptor(node.getReturnType(), parameters);
    String signature = BytecodeHelper.getGenericsMethodSignature(node);
    int modifiers = node.getModifiers();
    if (isVargs(node.getParameters()))
        modifiers |= ACC_VARARGS;
    MethodVisitor mv = classVisitor.visitMethod(modifiers, node.getName(), methodType, signature,
            buildExceptions(node.getExceptions()));
    controller.setMethodVisitor(mv);

    visitAnnotations(node, mv);
    for (int i = 0, n = parameters.length; i < n; i += 1) {
        visitParameterAnnotations(parameters[i], i, mv);
    }

    // add parameter names to the MethodVisitor (jdk8+ only)
    if (getCompileUnit().getConfig().getParameters()) {
        for (Parameter parameter : parameters) {
            // TODO: handle ACC_SYNTHETIC for enum method parameters?
            mv.visitParameter(parameter.getName(), 0);
        }
    }

    if (controller.getClassNode().isAnnotationDefinition() && !node.isStaticConstructor()) {
        visitAnnotationDefault(node, mv);
    } else if (!node.isAbstract()) {
        Statement code = node.getCode();
        mv.visitCode();
        // fast path for getter/setters etc.
        if (code instanceof BytecodeSequence && ((BytecodeSequence) code).getInstructions().size() == 1
                && ((BytecodeSequence) code).getInstructions().get(0) instanceof BytecodeInstruction) {
            ((BytecodeInstruction) ((BytecodeSequence) code).getInstructions().get(0)).visit(mv);
        } else {
            visitStdMethod(node, isConstructor, parameters, code);
        }
        try {
            mv.visitMaxs(0, 0);
        } catch (Exception e) {
            Writer writer = null;
            if (mv instanceof TraceMethodVisitor) {
                TraceMethodVisitor tracer = (TraceMethodVisitor) mv;
                writer = new StringBuilderWriter();
                PrintWriter p = new PrintWriter(writer);
                tracer.p.print(p);
                p.flush();
            }
            StringBuilder message = new StringBuilder(64);
            message.append("ASM reporting processing error for ");
            message.append(controller.getClassNode().toString()).append("#").append(node.getName());
            message.append(" with signature ").append(node.getTypeDescriptor());
            message.append(" in ").append(sourceFile).append(":").append(node.getLineNumber());
            if (writer != null) {
                message.append("\nLast known generated bytecode in last generated method or constructor:\n");
                message.append(writer);
            }
            throw new GroovyRuntimeException(message.toString(), e);
        }
    }
    mv.visitEnd();
}

---

From source file:org.eclipse.golo.compiler.JavaBytecodeStructGenerator.java

License:Open Source License

private void makeAllArgsConstructor(ClassWriter classWriter, Struct struct, String owner) {
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, "<init>", allArgsConstructorSignature(struct),
            null, null);/*from ww  w . ja  v a2  s.  c  om*/
    for (Member member : struct.getMembers()) {
        visitor.visitParameter(member.getName(), ACC_FINAL);
    }
    visitor.visitCode();
    visitor.visitVarInsn(ALOAD, 0);
    visitor.visitMethodInsn(INVOKESPECIAL, "gololang/GoloStruct", "<init>", "()V", false);
    int arg = 1;
    for (Member member : struct.getMembers()) {
        visitor.visitVarInsn(ALOAD, 0);
        visitor.visitVarInsn(ALOAD, arg);
        visitor.visitFieldInsn(PUTFIELD, owner, member.getName(), "Ljava/lang/Object;");
        arg++;
    }
    initMembersField(struct, owner, visitor);
    visitor.visitVarInsn(ALOAD, 0);
    visitor.visitInsn(ICONST_0);
    visitor.visitFieldInsn(PUTFIELD, owner, $_frozen, "Z");
    visitor.visitInsn(RETURN);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

---

From source file:org.eclipse.golo.compiler.JavaBytecodeStructGenerator.java

License:Open Source License

private void makeImmutableFactory(ClassWriter classWriter, Struct struct) {
    String constructorDesc = allArgsConstructorSignature(struct);
    String desc = constructorDesc.substring(0, constructorDesc.length() - 1);
    String classType = struct.getPackageAndClass().toJVMType();
    desc = desc + "L" + classType + ";";
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC | ACC_STATIC, IMMUTABLE_FACTORY_METHOD, desc,
            null, null);/*from  w  w w  .j  a  v  a  2 s  .co  m*/
    for (Member member : struct.getMembers()) {
        visitor.visitParameter(member.getName(), ACC_FINAL);
    }
    visitor.visitCode();
    visitor.visitTypeInsn(NEW, classType);
    visitor.visitInsn(DUP);
    for (int i = 0; i < struct.getMembers().size(); i++) {
        visitor.visitVarInsn(ALOAD, i);
    }
    visitor.visitMethodInsn(INVOKESPECIAL, classType, "<init>", constructorDesc, false);
    visitor.visitInsn(DUP);
    visitor.visitInsn(ICONST_1);
    visitor.visitFieldInsn(PUTFIELD, classType, $_frozen, "Z");
    visitor.visitInsn(ARETURN);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

---

From source file:org.eclipse.golo.compiler.JavaBytecodeStructGenerator.java

License:Open Source License

private void makeNoArgsConstructor(ClassWriter classWriter, Struct struct) {
    String owner = struct.getPackageAndClass().toJVMType();
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
    for (Member member : struct.getMembers()) {
        visitor.visitParameter(member.getName(), ACC_FINAL);
    }/*from   w w  w .j  a v a  2  s . co m*/
    visitor.visitCode();
    visitor.visitVarInsn(ALOAD, 0);
    visitor.visitMethodInsn(INVOKESPECIAL, "gololang/GoloStruct", "<init>", "()V", false);
    visitor.visitVarInsn(ALOAD, 0);
    visitor.visitInsn(ICONST_0);
    visitor.visitFieldInsn(PUTFIELD, struct.getPackageAndClass().toJVMType(), $_frozen, "Z");
    initMembersField(struct, owner, visitor);
    visitor.visitInsn(RETURN);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

---

From source file:org.eclipse.golo.compiler.JavaBytecodeUnionGenerator.java

License:Open Source License

private void makeStaticFactory(ClassWriter cw, UnionValue value) {
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, value.getName(),
            argsSignature(value.getMembers().size()) + value.getUnion().getPackageAndClass().toJVMRef(), null,
            null);//  w  ww. j  a  va 2 s  .c om
    for (Member member : value.getMembers()) {
        mv.visitParameter(member.getName(), ACC_FINAL);
    }
    mv.visitCode();
    mv.visitTypeInsn(NEW, value.getPackageAndClass().toJVMType());
    mv.visitInsn(DUP);
    for (int i = 0; i < value.getMembers().size(); i++) {
        mv.visitVarInsn(ALOAD, i);
    }
    mv.visitMethodInsn(INVOKESPECIAL, value.getPackageAndClass().toJVMType(), "<init>",
            argsSignature(value.getMembers().size()) + "V", false);
    mv.visitInsn(ARETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

---

From source file:org.eclipse.golo.compiler.JavaBytecodeUnionGenerator.java

License:Open Source License

private void makeMatchlikeTestMethod(ClassWriter classWriter, UnionValue value, boolean result) {
    String methName = "is" + value.getName();
    MethodVisitor mv = classWriter.visitMethod(ACC_PUBLIC, methName, "()Z", null, null);
    mv.visitCode();/*from w  ww  .  j a va  2  s.co m*/
    mv.visitInsn(result ? ICONST_1 : ICONST_0);
    mv.visitInsn(IRETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();

    if (value.hasMembers()) {
        mv = classWriter.visitMethod(ACC_PUBLIC, methName, argsSignature(value.getMembers().size()) + "Z", null,
                null);
        for (Member member : value.getMembers()) {
            mv.visitParameter(member.getName(), ACC_FINAL);
        }
        mv.visitCode();
        if (!result) {
            mv.visitInsn(ICONST_0);
        } else {
            int i = 1;
            Label allEquals = new Label();
            Label notEqual = new Label();
            String target = value.getPackageAndClass().toJVMType();
            for (Member member : value.getMembers()) {
                mv.visitVarInsn(ALOAD, i);
                mv.visitVarInsn(ALOAD, 0);
                mv.visitFieldInsn(GETFIELD, target, member.getName(), "Ljava/lang/Object;");
                mv.visitMethodInsn(INVOKESTATIC, "java/util/Objects", "equals",
                        "(Ljava/lang/Object;Ljava/lang/Object;)Z", false);
                mv.visitJumpInsn(IFEQ, notEqual);
                i++;
            }
            mv.visitInsn(ICONST_1);
            mv.visitJumpInsn(GOTO, allEquals);
            mv.visitLabel(notEqual);
            mv.visitInsn(ICONST_0);
            mv.visitLabel(allEquals);
        }
        mv.visitInsn(IRETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }
}

---

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