private void SetMappingValue(JsonMemberMapping memberMapping, JsonReader reader, object target)
{
if (memberMapping.Ignored)
{
reader.Skip();
return;
}
// get the member's underlying type
Type memberType = ReflectionUtils.GetMemberUnderlyingType(memberMapping.Member);
object currentValue = null;
bool useExistingValue = false;
if ((_objectCreationHandling == ObjectCreationHandling.Auto || _objectCreationHandling == ObjectCreationHandling.Reuse)
&& (reader.TokenType == JsonToken.StartArray || reader.TokenType == JsonToken.StartObject))
{
currentValue = ReflectionUtils.GetMemberValue(memberMapping.Member, target);
useExistingValue = (currentValue != null && !memberType.IsArray && !ReflectionUtils.InheritsGenericDefinition(memberType, typeof(ReadOnlyCollection<>)));
}
if (!memberMapping.Writable && !useExistingValue)
{
reader.Skip();
return;
}
object value = CreateObject(reader, memberType, (useExistingValue) ? currentValue : null, JsonTypeReflector.GetConverter(memberMapping.Member, memberType));
if (!useExistingValue && ShouldSetMappingValue(memberMapping, value))
ReflectionUtils.SetMemberValue(memberMapping.Member, target, value);
}
private object CreateObjectFromNonDefaultConstructor(Type objectType, JsonReader reader)
{
// object should have a single constructor
ConstructorInfo c = objectType.GetConstructors(BindingFlags.Public | BindingFlags.Instance).SingleOrDefault();
if (c == null)
throw new JsonSerializationException("Could not find a public constructor for type {0}.".FormatWith(CultureInfo.InvariantCulture, objectType));
// create a dictionary to put retrieved values into
JsonMemberMappingCollection memberMappings = GetMemberMappings(objectType);
IDictionary<JsonMemberMapping, object> mappingValues = memberMappings.ToDictionary(kv => kv, kv => (object)null);
bool exit = false;
while (!exit && reader.Read())
{
switch (reader.TokenType)
{
case JsonToken.PropertyName:
string memberName = reader.Value.ToString();
if (!reader.Read())
throw new JsonSerializationException("Unexpected end when setting {0}'s value.".FormatWith(CultureInfo.InvariantCulture, memberName));
JsonMemberMapping memberMapping;
// attempt exact case match first
// then try match ignoring case
if (memberMappings.TryGetClosestMatchMapping(memberName, out memberMapping))
{
if (!memberMapping.Ignored)
{
Type memberType = ReflectionUtils.GetMemberUnderlyingType(memberMapping.Member);
mappingValues[memberMapping] = CreateObject(reader, memberType, null, memberMapping.MemberConverter);
}
}
else
{
if (_missingMemberHandling == MissingMemberHandling.Error)
throw new JsonSerializationException("Could not find member '{0}' on object of type '{1}'".FormatWith(CultureInfo.InvariantCulture, memberName, objectType.Name));
reader.Skip();
}
break;
case JsonToken.EndObject:
exit = true;
break;
default:
throw new JsonSerializationException("Unexpected token when deserializing object: " + reader.TokenType);
}
}
IDictionary<ParameterInfo, object> constructorParameters = c.GetParameters().ToDictionary(p => p, p => (object)null);
IDictionary<JsonMemberMapping, object> remainingMappingValues = new Dictionary<JsonMemberMapping, object>();
foreach (KeyValuePair<JsonMemberMapping, object> mappingValue in mappingValues)
{
ParameterInfo matchingConstructorParameter = constructorParameters.ForgivingCaseSensitiveFind(kv => kv.Key.Name, mappingValue.Key.MappingName).Key;
if (matchingConstructorParameter != null)
constructorParameters[matchingConstructorParameter] = mappingValue.Value;
else
remainingMappingValues.Add(mappingValue);
}
object createdObject = ReflectionUtils.CreateInstance(objectType, constructorParameters.Values.ToArray());
// go through unused values and set the newly created object's properties
foreach (KeyValuePair<JsonMemberMapping, object> remainingMappingValue in remainingMappingValues)
{
if (ShouldSetMappingValue(remainingMappingValue.Key, remainingMappingValue.Value))
ReflectionUtils.SetMemberValue(remainingMappingValue.Key.Member, createdObject, remainingMappingValue.Value);
}
return createdObject;
}
private void SetObjectMember(JsonReader reader, object target, Type targetType, string memberName)
{
JsonMemberMappingCollection memberMappings = GetMemberMappings(targetType);
JsonMemberMapping memberMapping;
// attempt exact case match first
// then try match ignoring case
if (memberMappings.TryGetClosestMatchMapping(memberName, out memberMapping))
{
SetMappingValue(memberMapping, reader, target);
}
else
{
if (_missingMemberHandling == MissingMemberHandling.Error)
throw new JsonSerializationException("Could not find member '{0}' on object of type '{1}'".FormatWith(CultureInfo.InvariantCulture, memberName, targetType.Name));
reader.Skip();
}
}
