private static bool setOneField(Doc doc, Schema.FieldDef def, object fv, bool fromUI, DocReadOptions options)
{
var fieldCustomHandler = JsonHandlerAttribute.TryFind(def.MemberInfo);
var converted = cast(fv, def.Type, fromUI, options, fieldCustomHandler);
if (converted != null)
{
doc.SetFieldValue(def, converted);
return(true);
}
return(false);
}//setOneField
}//setOneField
//Returns non null on success; may return null for collection sub-element in which case null=null and does not indicate failure
private static object cast(object v, Type toType, bool fromUI, DocReadOptions options, JsonHandlerAttribute fieldCustomHandler = null)
{
//See #264 - the collection inability to cast has no amorphous data so it MUST throw
//used only for collections inner calls
if (v == null)
{
return(null);
}
var customHandler = fieldCustomHandler ?? JsonHandlerAttribute.TryFind(toType);
if (customHandler != null)
{
var castResult = customHandler.TypeCastOnRead(v, toType, fromUI, options);
if (castResult.Outcome >= JsonHandlerAttribute.TypeCastOutcome.ChangedTargetType)
{
toType = castResult.ToType;
}
if (castResult.Outcome == JsonHandlerAttribute.TypeCastOutcome.ChangedSourceValue)
{
v = castResult.Value;
}
else if (castResult.Outcome == JsonHandlerAttribute.TypeCastOutcome.HandledCast)
{
return(castResult.Value);
}
}
//object goes as is
if (toType == typeof(object))
{
return(v);
}
//IJSONDataObject
if (toType == typeof(IJsonDataObject))
{
if (v is IJsonDataObject)
{
return(v); //goes as is
}
if (v is string s) //string containing embedded JSON
{
var jo = s.JsonToDataObject();
return(jo);
}
}
//IJSONDataMap
if (toType == typeof(JsonDataMap))
{
if (v is JsonDataMap)
{
return(v); //goes as is
}
if (v is string s) //string containing embedded JSON
{
var jo = s.JsonToDataObject() as JsonDataMap;
return(jo);
}
}
//IJSONDataArray
if (toType == typeof(JsonDataArray))
{
if (v is JsonDataArray)
{
return(v); //goes as is
}
if (v is string s) //string containing embedded JSON
{
var jo = s.JsonToDataObject() as JsonDataArray;
return(jo);
}
}
var nntp = toType;
if (nntp.IsGenericType && nntp.GetGenericTypeDefinition() == typeof(Nullable <>))
{
nntp = toType.GetGenericArguments()[0];
}
//20191217 DKh
if (nntp == typeof(DateTime))
{
if (options.LocalDates)
{
var d = v.AsDateTime(System.Globalization.DateTimeStyles.AssumeLocal);
return(d);
}
else //UTC (the default)
{
var d = v.AsDateTime(System.Globalization.DateTimeStyles.AssumeUniversal | System.Globalization.DateTimeStyles.AdjustToUniversal);
return(d);
}
}
//20191217 DKh
//Custom JSON Readable (including config)
if (typeof(IJsonReadable).IsAssignableFrom(nntp) || typeof(IConfigSectionNode).IsAssignableFrom(nntp))
{
var toAllocate = nntp;
//Configuration requires special handling because nodes do not exist as independent entities and there
//is master/detail relationship between them
if (toAllocate == typeof(Configuration) ||
toAllocate == typeof(ConfigSectionNode) ||
toAllocate == typeof(IConfigSectionNode))
{
toAllocate = typeof(MemoryConfiguration);
}
if (toAllocate.IsAbstract)
{
throw new JSONDeserializationException(StringConsts.JSON_DESERIALIZATION_ABSTRACT_TYPE_ERROR.Args(toAllocate.Name, nameof(JsonHandlerAttribute)));
}
var newval = SerializationUtils.MakeNewObjectInstance(toAllocate) as IJsonReadable;
var got = newval.ReadAsJson(v, fromUI, options);//this may re-allocate the result based of newval
if (!got.match)
{
return(null);
}
if (typeof(IConfigSectionNode).IsAssignableFrom(nntp))
{
return((got.self as Configuration)?.Root);
}
return(got.self);
}
//byte[] direct assignment w/o copies
if (nntp == typeof(byte[]) && v is byte[] passed)
{
return(passed);
}
//field def = []
if (toType.IsArray)
{
var fvseq = v as IEnumerable;
if (fvseq == null)
{
return(null); //can not set non enumerable into array
}
var arr = fvseq.Cast <object>().Select(e => cast(e, toType.GetElementType(), fromUI, options, fieldCustomHandler)).ToArray();
var newval = Array.CreateInstance(toType.GetElementType(), arr.Length);
for (var i = 0; i < newval.Length; i++)
{
newval.SetValue(arr[i], i);
}
return(newval);
}
//field def = List<t>
if (toType.IsGenericType && toType.GetGenericTypeDefinition() == typeof(List <>))
{
var fvseq = v as IEnumerable;
if (fvseq == null)
{
return(false); //can not set non enumerable into List<t>
}
var arr = fvseq.Cast <object>().Select(e => cast(e, toType.GetGenericArguments()[0], fromUI, options, fieldCustomHandler)).ToArray();
var newval = SerializationUtils.MakeNewObjectInstance(toType) as IList;
for (var i = 0; i < arr.Length; i++)
{
newval.Add(arr[i]);
}
return(newval);
}
//last resort
try
{
return(StringValueConversion.AsType(v.ToString(), toType, false));
}
catch
{
return(null);//the value could not be converted, and is going to go into amorphous bag if it is enabled
}
}
private static void toDoc(Doc doc, DocReadOptions options, JsonDataMap jsonMap, ref string field, bool fromUI)
{
var amorph = doc as IAmorphousData;
var schema = doc.Schema;
foreach (var mfld in jsonMap)
{
field = mfld.Key;
var fv = mfld.Value;
//Multi-targeting for deserialization to TypedDoc from JSON
Schema.FieldDef def;
if (options.BindBy == DocReadOptions.By.CodeName)
{
def = schema[field];
}
else
{
def = schema.TryFindFieldByTargetedBackendName(options.TargetName, field);//what about case sensitive json name?
}
//No such field exists in a typed doc, try to put in amorphous data
if (def == null)
{
if (amorph != null)
{
if (amorph.AmorphousDataEnabled)
{
amorph.AmorphousData[mfld.Key] = fv;
}
}
continue;
}
if (fromUI && def.NonUI)
{
continue; //skip NonUI fields
}
//weed out NULLS here
if (fv == null)
{
doc.SetFieldValue(def, null);
continue;
}
//fv is NEVER NULL here
var wasset = setOneField(doc, def, fv, fromUI, options); //<------------------- field assignment
//try to put in amorphous data if could not be set in a field
if (!wasset && amorph != null)
{
if (amorph.AmorphousDataEnabled)
{
amorph.AmorphousData[mfld.Key] = fv;
}
}
}//foreach field in jsonMap
//process FORM
var form = doc as Form;
if (form != null)
{
form.FormMode = jsonMap[Form.JSON_MODE_PROPERTY].AsEnum <FormMode>(FormMode.Unspecified);
form.CSRFToken = jsonMap[Form.JSON_CSRF_PROPERTY].AsString();
var roundtrip = jsonMap[Form.JSON_ROUNDTRIP_PROPERTY].AsString();
if (roundtrip.IsNotNullOrWhiteSpace())
{
form.SetRoundtripBagFromJSONString(roundtrip);
}
}
if (amorph != null && amorph.AmorphousDataEnabled)
{
amorph.AfterLoad(options.TargetName ?? "json");
}
}
