Examples with MethodVisitor org.objectweb.asm.MethodVisitor used on opensource projects

Example 1 with MethodVisitor

use of org.objectweb.asm.MethodVisitor in project groovy by apache.

the class DgmConverter method createInvokeMethod.

private static void createInvokeMethod(CachedMethod method, ClassWriter cw, Class returnType, String methodDescriptor) {
    MethodVisitor mv;
    mv = cw.visitMethod(ACC_PUBLIC, "invoke", "(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;", null, null);
    mv.visitCode();
    mv.visitVarInsn(ALOAD, 1);
    BytecodeHelper.doCast(mv, method.getParameterTypes()[0].getTheClass());
    loadParameters(method, 2, mv);
    mv.visitMethodInsn(INVOKESTATIC, BytecodeHelper.getClassInternalName(method.getDeclaringClass().getTheClass()), method.getName(), methodDescriptor, false);
    BytecodeHelper.box(mv, returnType);
    if (method.getReturnType() == void.class) {
        mv.visitInsn(ACONST_NULL);
    }
    mv.visitInsn(ARETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

Example 2 with MethodVisitor

use of org.objectweb.asm.MethodVisitor in project groovy by apache.

the class DgmConverter method createConstructor.

private static void createConstructor(ClassWriter cw) {
    MethodVisitor mv;
    mv = cw.visitMethod(ACC_PUBLIC, "<init>", "(Ljava/lang/String;Lorg/codehaus/groovy/reflection/CachedClass;Ljava/lang/Class;[Ljava/lang/Class;)V", null, null);
    mv.visitCode();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitVarInsn(ALOAD, 2);
    mv.visitVarInsn(ALOAD, 3);
    mv.visitVarInsn(ALOAD, 4);
    mv.visitMethodInsn(INVOKESPECIAL, "org/codehaus/groovy/reflection/GeneratedMetaMethod", "<init>", "(Ljava/lang/String;Lorg/codehaus/groovy/reflection/CachedClass;Ljava/lang/Class;[Ljava/lang/Class;)V", false);
    mv.visitInsn(RETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

Example 3 with MethodVisitor

use of org.objectweb.asm.MethodVisitor in project groovy by apache.

the class DgmConverter method createDoMethodInvokeMethod.

private static void createDoMethodInvokeMethod(CachedMethod method, ClassWriter cw, String className, Class returnType, String methodDescriptor) {
    MethodVisitor mv;
    mv = cw.visitMethod(ACC_PUBLIC + ACC_FINAL, "doMethodInvoke", "(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;", null, null);
    mv.visitCode();
    if (method.getParamsCount() == 2 && method.getParameterTypes()[0].isNumber && method.getParameterTypes()[1].isNumber) {
        mv.visitVarInsn(ALOAD, 1);
        BytecodeHelper.doCast(mv, method.getParameterTypes()[0].getTheClass());
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKEVIRTUAL, className, "getParameterTypes", "()[Lorg/codehaus/groovy/reflection/CachedClass;", false);
        mv.visitInsn(ICONST_0);
        mv.visitInsn(AALOAD);
        mv.visitVarInsn(ALOAD, 2);
        mv.visitInsn(ICONST_0);
        mv.visitInsn(AALOAD);
        mv.visitMethodInsn(INVOKEVIRTUAL, "org/codehaus/groovy/reflection/CachedClass", "coerceArgument", "(Ljava/lang/Object;)Ljava/lang/Object;", false);
        // cast argument to parameter class, inclusive unboxing
        // for methods with primitive types
        Class type = method.getParameterTypes()[1].getTheClass();
        BytecodeHelper.doCast(mv, type);
    } else {
        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(ALOAD, 2);
        mv.visitMethodInsn(INVOKEVIRTUAL, className, "coerceArgumentsToClasses", "([Ljava/lang/Object;)[Ljava/lang/Object;", false);
        mv.visitVarInsn(ASTORE, 2);
        mv.visitVarInsn(ALOAD, 1);
        BytecodeHelper.doCast(mv, method.getParameterTypes()[0].getTheClass());
        loadParameters(method, 2, mv);
    }
    mv.visitMethodInsn(INVOKESTATIC, BytecodeHelper.getClassInternalName(method.getDeclaringClass().getTheClass()), method.getName(), methodDescriptor, false);
    BytecodeHelper.box(mv, returnType);
    if (method.getReturnType() == void.class) {
        mv.visitInsn(ACONST_NULL);
    }
    mv.visitInsn(ARETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

Example 4 with MethodVisitor

use of org.objectweb.asm.MethodVisitor in project groovy by apache.

the class AsmClassGenerator method visitGStringExpression.

public void visitGStringExpression(GStringExpression expression) {
    MethodVisitor mv = controller.getMethodVisitor();
    mv.visitTypeInsn(NEW, "org/codehaus/groovy/runtime/GStringImpl");
    mv.visitInsn(DUP);
    int size = expression.getValues().size();
    BytecodeHelper.pushConstant(mv, size);
    mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
    for (int i = 0; i < size; i++) {
        mv.visitInsn(DUP);
        BytecodeHelper.pushConstant(mv, i);
        expression.getValue(i).visit(this);
        controller.getOperandStack().box();
        mv.visitInsn(AASTORE);
    }
    controller.getOperandStack().remove(size);
    List strings = expression.getStrings();
    size = strings.size();
    BytecodeHelper.pushConstant(mv, size);
    mv.visitTypeInsn(ANEWARRAY, "java/lang/String");
    for (int i = 0; i < size; i++) {
        mv.visitInsn(DUP);
        BytecodeHelper.pushConstant(mv, i);
        controller.getOperandStack().pushConstant((ConstantExpression) strings.get(i));
        controller.getOperandStack().box();
        mv.visitInsn(AASTORE);
    }
    controller.getOperandStack().remove(size);
    mv.visitMethodInsn(INVOKESPECIAL, "org/codehaus/groovy/runtime/GStringImpl", "<init>", "([Ljava/lang/Object;[Ljava/lang/String;)V", false);
    controller.getOperandStack().push(ClassHelper.GSTRING_TYPE);
}

Example 5 with MethodVisitor

use of org.objectweb.asm.MethodVisitor in project groovy by apache.

the class CompareIdentityExpression method visit.

@Override
public void visit(final GroovyCodeVisitor visitor) {
    if (visitor instanceof AsmClassGenerator) {
        AsmClassGenerator acg = (AsmClassGenerator) visitor;
        WriterController controller = acg.getController();
        controller.getTypeChooser().resolveType(leftExpression, controller.getClassNode());
        controller.getTypeChooser().resolveType(rightExpression, controller.getClassNode());
        MethodVisitor mv = controller.getMethodVisitor();
        leftExpression.visit(acg);
        controller.getOperandStack().box();
        rightExpression.visit(acg);
        controller.getOperandStack().box();
        Label l1 = new Label();
        mv.visitJumpInsn(IF_ACMPNE, l1);
        mv.visitInsn(ICONST_1);
        Label l2 = new Label();
        mv.visitJumpInsn(GOTO, l2);
        mv.visitLabel(l1);
        mv.visitInsn(ICONST_0);
        mv.visitLabel(l2);
        controller.getOperandStack().replace(ClassHelper.boolean_TYPE, 2);
    } else {
        super.visit(visitor);
    }
}