Example #1
0
  static void emitFromNativeConversion(
      AsmBuilder builder,
      SkinnyMethodAdapter mv,
      FromNativeType fromNativeType,
      Class nativeClass) {
    // If there is a result converter, retrieve it and put on the stack
    FromNativeConverter fromNativeConverter = fromNativeType.getFromNativeConverter();
    if (fromNativeConverter != null) {
      convertPrimitive(
          mv,
          nativeClass,
          unboxedType(fromNativeConverter.nativeType()),
          fromNativeType.getNativeType());
      boxValue(builder, mv, fromNativeConverter.nativeType(), nativeClass);

      Method fromNativeMethod = getFromNativeMethod(fromNativeType, builder.getClassLoader());
      getfield(mv, builder, builder.getFromNativeConverterField(fromNativeConverter));
      mv.swap();
      if (fromNativeType.getFromNativeContext() != null) {
        getfield(
            mv, builder, builder.getFromNativeContextField(fromNativeType.getFromNativeContext()));
      } else {
        mv.aconst_null();
      }

      if (fromNativeMethod.getDeclaringClass().isInterface()) {
        mv.invokeinterface(
            fromNativeMethod.getDeclaringClass(),
            fromNativeMethod.getName(),
            fromNativeMethod.getReturnType(),
            fromNativeMethod.getParameterTypes());
      } else {
        mv.invokevirtual(
            fromNativeMethod.getDeclaringClass(),
            fromNativeMethod.getName(),
            fromNativeMethod.getReturnType(),
            fromNativeMethod.getParameterTypes());
      }

      if (fromNativeType.getDeclaredType().isPrimitive()) {
        // The actual return type is a primitive, but there was a converter for it - extract the
        // primitive value
        Class boxedType = getBoxedClass(fromNativeType.getDeclaredType());
        if (!boxedType.isAssignableFrom(fromNativeMethod.getReturnType()))
          mv.checkcast(p(boxedType));
        unboxNumber(
            mv, boxedType, fromNativeType.getDeclaredType(), fromNativeType.getNativeType());

      } else if (!fromNativeType
          .getDeclaredType()
          .isAssignableFrom(fromNativeMethod.getReturnType())) {
        mv.checkcast(p(fromNativeType.getDeclaredType()));
      }

    } else if (!fromNativeType.getDeclaredType().isPrimitive()) {
      Class unboxedType = unboxedType(fromNativeType.getDeclaredType());
      convertPrimitive(mv, nativeClass, unboxedType, fromNativeType.getNativeType());
      boxValue(builder, mv, fromNativeType.getDeclaredType(), unboxedType);
    }
  }
Example #2
0
  static void emitToNativeConversion(
      AsmBuilder builder, SkinnyMethodAdapter mv, ToNativeType toNativeType) {
    ToNativeConverter parameterConverter = toNativeType.getToNativeConverter();
    if (parameterConverter != null) {
      Method toNativeMethod = getToNativeMethod(toNativeType, builder.getClassLoader());

      if (toNativeType.getDeclaredType().isPrimitive()) {
        boxValue(
            builder,
            mv,
            getBoxedClass(toNativeType.getDeclaredType()),
            toNativeType.getDeclaredType());
      }
      if (!toNativeMethod.getParameterTypes()[0].isAssignableFrom(
          getBoxedClass(toNativeType.getDeclaredType()))) {
        mv.checkcast(toNativeMethod.getParameterTypes()[0]);
      }

      mv.aload(0);
      AsmBuilder.ObjectField toNativeConverterField =
          builder.getToNativeConverterField(parameterConverter);
      mv.getfield(
          builder.getClassNamePath(),
          toNativeConverterField.name,
          ci(toNativeConverterField.klass));
      if (!toNativeMethod.getDeclaringClass().equals(toNativeConverterField.klass)) {
        mv.checkcast(toNativeMethod.getDeclaringClass());
      }

      // Re-order so the value to be converted is on the top of the stack
      mv.swap();

      // load context parameter (if there is one)
      if (toNativeType.getToNativeContext() != null) {
        getfield(mv, builder, builder.getToNativeContextField(toNativeType.getToNativeContext()));
      } else {
        mv.aconst_null();
      }

      if (toNativeMethod.getDeclaringClass().isInterface()) {
        mv.invokeinterface(
            toNativeMethod.getDeclaringClass(),
            toNativeMethod.getName(),
            toNativeMethod.getReturnType(),
            toNativeMethod.getParameterTypes());
      } else {
        mv.invokevirtual(
            toNativeMethod.getDeclaringClass(),
            toNativeMethod.getName(),
            toNativeMethod.getReturnType(),
            toNativeMethod.getParameterTypes());
      }
      if (!parameterConverter.nativeType().isAssignableFrom(toNativeMethod.getReturnType())) {
        mv.checkcast(p(parameterConverter.nativeType()));
      }
    }
  }
Example #3
0
  static void boxValue(
      AsmBuilder builder, SkinnyMethodAdapter mv, Class boxedType, Class unboxedType) {
    if (boxedType == unboxedType || boxedType.isPrimitive()) {

    } else if (Boolean.class.isAssignableFrom(boxedType)) {
      narrow(mv, unboxedType, boolean.class);
      mv.invokestatic(Boolean.class, "valueOf", Boolean.class, boolean.class);

    } else if (Pointer.class.isAssignableFrom(boxedType)) {
      getfield(mv, builder, builder.getRuntimeField());
      mv.invokestatic(
          AsmRuntime.class, "pointerValue", Pointer.class, unboxedType, jnr.ffi.Runtime.class);

    } else if (Address.class == boxedType) {
      mv.invokestatic(boxedType, "valueOf", boxedType, unboxedType);

    } else if (Number.class.isAssignableFrom(boxedType) && boxedType(unboxedType) == boxedType) {
      mv.invokestatic(boxedType, "valueOf", boxedType, unboxedType);

    } else {
      throw new IllegalArgumentException(
          "cannot box value of type " + unboxedType + " to " + boxedType);
    }
  }
Example #4
0
 static void getfield(SkinnyMethodAdapter mv, AsmBuilder builder, AsmBuilder.ObjectField field) {
   mv.aload(0);
   mv.getfield(builder.getClassNamePath(), field.name, ci(field.klass));
 }