private void SetPropertyValue(JsonProperty property, JsonReader reader, object target)
{
if (property.Ignored)
{
reader.Skip();
return;
}
object currentValue = null;
bool useExistingValue = false;
bool gottenCurrentValue = false;
ObjectCreationHandling objectCreationHandling =
property.ObjectCreationHandling.GetValueOrDefault(Serializer.ObjectCreationHandling);
if ((objectCreationHandling == ObjectCreationHandling.Auto || objectCreationHandling == ObjectCreationHandling.Reuse)
&& (reader.TokenType == JsonToken.StartArray || reader.TokenType == JsonToken.StartObject)
&& property.Readable)
{
currentValue = property.ValueProvider.GetValue(target);
gottenCurrentValue = true;
useExistingValue = (currentValue != null
&& !property.PropertyType.IsArray
&& !ReflectionUtils.InheritsGenericDefinition(property.PropertyType, typeof(ReadOnlyCollection<>))
&& !property.PropertyType.IsValueType);
}
if (!property.Writable && !useExistingValue)
{
reader.Skip();
return;
}
// test tokentype here because null might not be convertable to some types, e.g. ignoring null when applied to DateTime
if (property.NullValueHandling.GetValueOrDefault(Serializer.NullValueHandling) == NullValueHandling.Ignore && reader.TokenType == JsonToken.Null)
{
reader.Skip();
return;
}
// test tokentype here because default value might not be convertable to actual type, e.g. default of "" for DateTime
if (HasFlag(property.DefaultValueHandling.GetValueOrDefault(Serializer.DefaultValueHandling), DefaultValueHandling.Ignore)
&& JsonReader.IsPrimitiveToken(reader.TokenType)
&& MiscellaneousUtils.ValueEquals(reader.Value, property.DefaultValue))
{
reader.Skip();
return;
}
object existingValue = (useExistingValue) ? currentValue : null;
object value = CreateValueProperty(reader, property, target, gottenCurrentValue, existingValue);
// always set the value if useExistingValue is false,
// otherwise also set it if CreateValue returns a new value compared to the currentValue
// this could happen because of a JsonConverter against the type
if ((!useExistingValue || value != currentValue)
&& ShouldSetPropertyValue(property, value))
{
property.ValueProvider.SetValue(target, value);
if (property.SetIsSpecified != null)
property.SetIsSpecified(target, true);
}
}
private bool SetPropertyValue(JsonProperty property, JsonConverter propertyConverter, JsonContainerContract containerContract, JsonProperty containerProperty, JsonReader reader, object target)
{
object currentValue;
bool useExistingValue;
JsonContract propertyContract;
bool gottenCurrentValue;
if (CalculatePropertyDetails(property, ref propertyConverter, containerContract, containerProperty, reader, target, out useExistingValue, out currentValue, out propertyContract, out gottenCurrentValue))
return false;
object value;
if (propertyConverter != null && propertyConverter.CanRead)
{
if (!gottenCurrentValue && target != null && property.Readable)
currentValue = property.ValueProvider.GetValue(target);
value = DeserializeConvertable(propertyConverter, reader, property.PropertyType, currentValue);
}
else
{
value = CreateValueInternal(reader, property.PropertyType, propertyContract, property, containerContract, containerProperty, (useExistingValue) ? currentValue : null);
}
// always set the value if useExistingValue is false,
// otherwise also set it if CreateValue returns a new value compared to the currentValue
// this could happen because of a JsonConverter against the type
if ((!useExistingValue || value != currentValue)
&& ShouldSetPropertyValue(property, value))
{
property.ValueProvider.SetValue(target, value);
if (property.SetIsSpecified != null)
{
if (TraceWriter != null && TraceWriter.LevelFilter >= TraceLevel.Verbose)
TraceWriter.Trace(TraceLevel.Verbose, JsonPosition.FormatMessage(reader as IJsonLineInfo, reader.Path, "IsSpecified for property '{0}' on {1} set to true.".FormatWith(CultureInfo.InvariantCulture, property.PropertyName, property.DeclaringType)), null);
property.SetIsSpecified(target, true);
}
return true;
}
// the value wasn't set be JSON was populated onto the existing value
return useExistingValue;
}