static Method getFromNativeMethod(FromNativeType fromNativeType, AsmClassLoader classLoader) {
FromNativeConverter fromNativeConverter = fromNativeType.getFromNativeConverter();
if (fromNativeConverter == null) {
return null;
}
try {
Class<? extends FromNativeConverter> fromNativeConverterClass =
fromNativeConverter.getClass();
if (Modifier.isPublic(fromNativeConverterClass.getModifiers())) {
for (Method method : fromNativeConverterClass.getMethods()) {
if (!method.getName().equals("fromNative")) continue;
Class[] methodParameterTypes = method.getParameterTypes();
Class javaType =
fromNativeType.getDeclaredType().isPrimitive()
? boxedType(fromNativeType.getDeclaredType())
: fromNativeType.getDeclaredType();
if (javaType.isAssignableFrom(method.getReturnType())
&& methodParameterTypes.length == 2
&& methodParameterTypes[0].isAssignableFrom(fromNativeConverter.nativeType())
&& methodParameterTypes[1] == FromNativeContext.class
&& methodIsAccessible(method)
&& classIsVisible(classLoader, method.getDeclaringClass())) {
return method;
}
}
}
Method method =
fromNativeConverterClass.getMethod("fromNative", Object.class, FromNativeContext.class);
return methodIsAccessible(method) && classIsVisible(classLoader, method.getDeclaringClass())
? method
: FromNativeConverter.class.getDeclaredMethod(
"fromNative", Object.class, FromNativeContext.class);
} catch (NoSuchMethodException nsme) {
try {
return FromNativeConverter.class.getDeclaredMethod(
"fromNative", Object.class, FromNativeContext.class);
} catch (NoSuchMethodException nsme2) {
throw new RuntimeException(
"internal error. " + FromNativeConverter.class + " has no fromNative() method");
}
}
}
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);
}
}