private WeaveResult WeaveProperty(PropertyDefinition prop, TypeDefinition type, Dictionary<string, Tuple<MethodReference, MethodReference>> methodTable)
{
var columnName = prop.Name;
var mapToAttribute = prop.CustomAttributes.FirstOrDefault(a => a.AttributeType.Name == "MapToAttribute");
if (mapToAttribute != null)
{
columnName = (string)mapToAttribute.ConstructorArguments[0].Value;
}
var backingField = prop.GetBackingField();
var isIndexed = prop.CustomAttributes.Any(a => a.AttributeType.Name == "IndexedAttribute");
if (isIndexed && (!_indexableTypes.Contains(prop.PropertyType.FullName)))
{
return WeaveResult.Error($"{type.Name}.{prop.Name} is marked as [Indexed] which is only allowed on integral types as well as string, bool and DateTimeOffset, not on {prop.PropertyType.FullName}.");
}
var isPrimaryKey = prop.IsPrimaryKey();
if (isPrimaryKey && (!_primaryKeyTypes.Contains(prop.PropertyType.FullName)))
{
return WeaveResult.Error($"{type.Name}.{prop.Name} is marked as [PrimaryKey] which is only allowed on integral and string types, not on {prop.PropertyType.FullName}.");
}
var isRequired = prop.IsRequired();
if (isRequired &&
!prop.IsNullable() &&
prop.PropertyType.FullName != StringTypeName &&
prop.PropertyType.FullName != ByteArrayTypeName)
{
return WeaveResult.Error($"{type.Name}.{prop.Name} is marked as [Required] which is only allowed on strings or nullable scalar types, not on {prop.PropertyType.FullName}.");
}
if (!prop.IsAutomatic())
{
if (prop.PropertyType.Resolve().BaseType.IsSameAs(_references.RealmObject))
{
return WeaveResult.Warning($"{type.Name}.{columnName} is not an automatic property but its type is a RealmObject which normally indicates a relationship.");
}
return WeaveResult.Skipped();
}
if (_typeTable.ContainsKey(prop.PropertyType.FullName))
{
// If the property is automatic but doesn't have a setter, we should still ignore it.
if (prop.SetMethod == null)
{
return WeaveResult.Skipped();
}
var typeId = prop.PropertyType.FullName + (isPrimaryKey ? " unique" : string.Empty);
Tuple<MethodReference, MethodReference> realmAccessors;
if (!methodTable.TryGetValue(typeId, out realmAccessors))
{
var getter = new MethodReference("Get" + _typeTable[prop.PropertyType.FullName] + "Value", prop.PropertyType, _references.RealmObject)
{
HasThis = true,
Parameters = { new ParameterDefinition(ModuleDefinition.TypeSystem.String) }
};
var setter = new MethodReference("Set" + _typeTable[prop.PropertyType.FullName] + "Value" + (isPrimaryKey ? "Unique" : string.Empty), ModuleDefinition.TypeSystem.Void, _references.RealmObject)
{
HasThis = true,
Parameters =
{
new ParameterDefinition(ModuleDefinition.TypeSystem.String),
new ParameterDefinition(prop.PropertyType)
}
};
methodTable[typeId] = realmAccessors = Tuple.Create(getter, setter);
}
ReplaceGetter(prop, columnName, realmAccessors.Item1);
ReplaceSetter(prop, backingField, columnName, realmAccessors.Item2);
}
else if (prop.IsIList())
{
var elementType = ((GenericInstanceType)prop.PropertyType).GenericArguments.Single();
if (!elementType.Resolve().BaseType.IsSameAs(_references.RealmObject))
{
return WeaveResult.Warning($"SKIPPING {type.Name}.{columnName} because it is an IList but its generic type is not a RealmObject subclass, so will not persist.");
}
if (prop.SetMethod != null)
{
return WeaveResult.Error($"{type.Name}.{columnName} has a setter but its type is a IList which only supports getters.");
}
var concreteListConstructor = _references.System_Collections_Generic_ListOfT_Constructor.MakeHostInstanceGeneric(elementType);
// weaves list getter which also sets backing to List<T>, forcing it to accept us setting it post-init
var backingDef = backingField as FieldDefinition;
if (backingDef != null)
{
backingDef.Attributes &= ~FieldAttributes.InitOnly; // without a set; auto property has this flag we must clear
}
ReplaceListGetter(prop, backingField, columnName,
new GenericInstanceMethod(_references.RealmObject_GetListValue) { GenericArguments = { elementType } },
concreteListConstructor);
}
else if (prop.PropertyType.Resolve().BaseType.IsSameAs(_references.RealmObject))
{
// with casting in the _realmObject methods, should just work
ReplaceGetter(prop, columnName,
new GenericInstanceMethod(_references.RealmObject_GetObjectValue) { GenericArguments = { prop.PropertyType } });
ReplaceSetter(prop, backingField, columnName,
new GenericInstanceMethod(_references.RealmObject_SetObjectValue) { GenericArguments = { prop.PropertyType } });
}
else if (prop.IsIQueryable())
{
var backlinkAttribute = prop.CustomAttributes.FirstOrDefault(a => a.AttributeType.Name == "BacklinkAttribute");
if (backlinkAttribute == null)
{
return WeaveResult.Skipped();
}
if (prop.SetMethod != null)
{
return WeaveResult.Error("Backlink properties must be read-only.");
}
var elementType = ((GenericInstanceType)prop.PropertyType).GenericArguments.Single();
var inversePropertyName = (string)backlinkAttribute.ConstructorArguments[0].Value;
var inverseProperty = elementType.Resolve().Properties.SingleOrDefault(p => p.Name == inversePropertyName);
if (inverseProperty == null || (!inverseProperty.PropertyType.IsSameAs(type) && !inverseProperty.IsIList(type)))
{
return WeaveResult.Error($"The property '{elementType.Name}.{inversePropertyName}' does not constitute a link to '{type.Name}' as described by '{type.Name}.{prop.Name}'.");
}
var backingDef = backingField as FieldDefinition;
if (backingDef != null)
{
backingDef.Attributes &= ~FieldAttributes.InitOnly; // without a set; auto property has this flag we must clear
}
ReplaceBacklinksGetter(prop, backingField, columnName, elementType);
}
else if (prop.SetMethod == null)
{
return WeaveResult.Skipped();
}
else if (prop.PropertyType.FullName == "System.DateTime")
{
return WeaveResult.Error($"Class '{type.Name}' field '{prop.Name}' is a DateTime which is not supported - use DateTimeOffset instead.");
}
else if (prop.PropertyType.FullName == "System.Nullable`1<System.DateTime>")
{
return WeaveResult.Error($"Class '{type.Name}' field '{prop.Name}' is a DateTime? which is not supported - use DateTimeOffset? instead.");
}
else
{
return WeaveResult.Error($"Class '{type.Name}' field '{columnName}' is a '{prop.PropertyType}' which is not yet supported.");
}
var preserveAttribute = new CustomAttribute(_references.PreserveAttribute_Constructor);
prop.CustomAttributes.Add(preserveAttribute);
var wovenPropertyAttribute = new CustomAttribute(_references.WovenPropertyAttribute_Constructor);
prop.CustomAttributes.Add(wovenPropertyAttribute);
Debug.WriteLine(string.Empty);
var primaryKeyMsg = isPrimaryKey ? "[PrimaryKey]" : string.Empty;
var indexedMsg = isIndexed ? "[Indexed]" : string.Empty;
LogDebug($"Woven {type.Name}.{prop.Name} as a {prop.PropertyType.FullName} {primaryKeyMsg} {indexedMsg}.");
return WeaveResult.Success(prop, backingField, isPrimaryKey);
}