private PopulateDelegateSignature EmitPopulateDelegate()
{
// TODO Serialization: validate mappings array count
var constructor =
typeof(DeserializedDefinition <>).MakeGenericType(Type).GetConstructor(new[] { Type, typeof(DeserializedFieldEntry[]) }) ??
throw new NullReferenceException();
var valueParam = Expression.Parameter(typeof(object), "value");
var valueParamCast = Expression.Convert(valueParam, Type);
var mappingParam = Expression.Parameter(typeof(DeserializedFieldEntry[]), "mapping");
var newExp = Expression.New(constructor, valueParamCast, mappingParam);
var createDefinitionDelegate = Expression.Lambda <CreateDefinitionDelegate>(newExp, valueParam, mappingParam).Compile();
DeserializationResult PopulateDelegate(
object target,
DeserializedFieldEntry[] deserializedFields,
object?[] defaultValues)
{
for (var i = 0; i < BaseFieldDefinitions.Length; i++)
{
var res = deserializedFields[i];
if (!res.Mapped)
{
continue;
}
var defValue = defaultValues[i];
if (Equals(res.Result?.RawValue, defValue))
{
continue;
}
FieldAssigners[i](ref target, res.Result?.RawValue);
}
return(createDefinitionDelegate(target, deserializedFields));
}
return(PopulateDelegate);
}
// TODO Serialization: add skipHook
private CopyDelegateSignature EmitCopyDelegate()
{
object CopyDelegate(
object source,
object target,
ISerializationManager manager,
ISerializationContext?context)
{
for (var i = 0; i < BaseFieldDefinitions.Length; i++)
{
var field = BaseFieldDefinitions[i];
var accessor = FieldAccessors[i];
var sourceValue = accessor(ref source);
var targetValue = accessor(ref target);
object?copy;
if (sourceValue != null &&
targetValue != null &&
TypeHelpers.SelectCommonType(sourceValue.GetType(), targetValue.GetType()) == null)
{
copy = manager.CreateCopy(sourceValue, context);
}
else
{
copy = field.Attribute.CustomTypeSerializer != null
? manager.CopyWithTypeSerializer(field.Attribute.CustomTypeSerializer, sourceValue,
targetValue,
context)
: manager.Copy(sourceValue, targetValue, context);
}
FieldAssigners[i](ref target, copy);
}
return(target);
}
return(CopyDelegate);
}
