private static IList<AnnotationAttribute> GetAttributes(Type annotationClass)
{
var props = new List<AnnotationAttribute>();
#if true
var clazzProperties = annotationClass.GetProperties(BindingFlags.Instance | BindingFlags.Public);
if (clazzProperties.Length == 0) {
return Collections.GetEmptyList<AnnotationAttribute>();
}
foreach (var clazzProperty in clazzProperties
.Where(c => c.DeclaringType != typeof(Attribute))
.Where(c => c.CanRead)) {
var annotationAttribute = new AnnotationAttribute(
clazzProperty.Name,
clazzProperty.PropertyType,
GetDefaultValue(clazzProperty));
props.Add(annotationAttribute);
}
#else
var methods = annotationClass.GetMethods();
if (methods.Length == 0) {
return Collections.GetEmptyList<AnnotationAttribute>();
}
for (var i = 0; i < methods.Length; i++) {
var method = methods[i];
if (method.ReturnType == typeof(void)) {
continue;
}
var parameters = method.GetParameters();
if (parameters.Length > 0) {
continue;
}
var methodName = method.Name;
if (methodName.Equals("GetType") ||
methodName.Equals("ToString") ||
methodName.Equals("AnnotationType") ||
methodName.Equals("GetHashCode")) {
continue;
}
props.Add(new AnnotationAttribute(method.Name, method.ReturnType, null)); // TBD: method.DefaultValue
}
#endif
props.Sort(
(
o1,
o2) => o1.Name.CompareTo(o2.Name));
return props;
}
private static object GetFinalValue(
Type annotationClass,
AnnotationAttribute annotationAttribute,
object value,
ImportServiceCompileTime importService)
{
if (value == null) {
if (annotationAttribute.DefaultValue == null) {
throw new AnnotationException(
"Annotation '" +
annotationClass.GetSimpleName() +
"' requires a value for attribute '" +
annotationAttribute.Name +
"'");
}
return annotationAttribute.DefaultValue;
}
// handle non-array
if (!annotationAttribute.AnnotationType.IsArray) {
// handle primitive value
if (!annotationAttribute.AnnotationType.IsAttribute()) {
// if expecting an enumeration type, allow string value
if (annotationAttribute.AnnotationType.IsEnum && (value is string valueString)) {
valueString = valueString.Trim();
var annotationType = annotationAttribute.AnnotationType;
try {
return Enum.Parse(annotationType, valueString, true);
}
catch (ArgumentException) {
throw new AnnotationException(
"Annotation '" +
annotationClass.FullName +
"' requires an enum-value '" +
annotationAttribute.AnnotationType.FullName +
"' for attribute '" +
annotationAttribute.Name +
"' but received '" +
value +
"' which is not one of the enum choices");
}
}
// cast as required
var caster = SimpleTypeCasterFactory.GetCaster(value.GetType(), annotationAttribute.AnnotationType);
var finalValue = caster.Cast(value);
if (finalValue == null) {
throw new AnnotationException(
"Annotation '" +
annotationClass.Name +
"' requires a " +
annotationAttribute.AnnotationType.Name +
"-typed value for attribute '" +
annotationAttribute.Name +
"' but received " +
"a " +
value.GetType().Name +
"-typed value");
}
return finalValue;
}
// nested annotation
if (!(value is AnnotationDesc)) {
throw new AnnotationException(
"Annotation '" +
annotationClass.GetSimpleName() +
"' requires a " +
annotationAttribute.AnnotationType.GetSimpleName() +
"-typed value for attribute '" +
annotationAttribute.Name +
"' but received " +
"a " +
value.GetType().GetSimpleName() +
"-typed value");
}
return CreateAttributeInstance((AnnotationDesc) value, importService);
}
if (!(value is Array valueAsArray)) {
throw new AnnotationException(
"Annotation '" +
annotationClass.GetSimpleName() +
"' requires a " +
annotationAttribute.AnnotationType.GetSimpleName() +
"-typed value for attribute '" +
annotationAttribute.Name +
"' but received " +
"a " +
value.GetType().GetSimpleName() +
"-typed value");
}
var componentType = annotationAttribute.AnnotationType.GetElementType();
var array = Array.CreateInstance(componentType, valueAsArray.Length);
for (var i = 0; i < valueAsArray.Length; i++) {
var arrayValue = valueAsArray.GetValue(i);
if (arrayValue == null) {
throw new AnnotationException(
"Annotation '" +
annotationClass.GetSimpleName() +
"' requires a " +
"non-null value for array elements for attribute '" +
annotationAttribute.Name +
"'");
}
object finalValue;
if (arrayValue is AnnotationDesc annotationDesc) {
var inner = CreateAttributeInstance(annotationDesc, importService);
if (!componentType.IsInstanceOfType(inner)) {
throw MakeArrayMismatchException(
annotationClass,
componentType,
annotationAttribute.Name,
inner.GetType());
}
finalValue = inner;
}
else {
var caster = SimpleTypeCasterFactory.GetCaster(
arrayValue.GetType(),
annotationAttribute.AnnotationType.GetElementType());
finalValue = caster.Cast(arrayValue);
if (finalValue == null) {
throw MakeArrayMismatchException(
annotationClass,
componentType,
annotationAttribute.Name,
arrayValue.GetType());
}
}
array.SetValue(finalValue, i);
}
return array;
}
