/// <summary>
/// Reads the JSON representation of the object.
/// </summary>
/// <param name="reader">The <see cref="JsonReader"/> to read from.</param>
/// <param name="objectType">Type of the object.</param>
/// <param name="existingValue">The existing value of object being read.</param>
/// <param name="serializer">The calling serializer.</param>
/// <returns>The object value.</returns>
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
if (reader.TokenType == JsonToken.Null)
{
return(null);
}
IEnumerable cases = (IEnumerable)FSharpUtils.GetUnionCases(null, objectType, null);
ReadAndAssertProperty(reader, CasePropertyName);
ReadAndAssert(reader);
string caseName = reader.Value.ToString();
object matchingCaseInfo = null;
foreach (object c in cases)
{
if ((string)FSharpUtils.GetUnionCaseInfoName(c) == caseName)
{
matchingCaseInfo = c;
break;
}
}
if (matchingCaseInfo == null)
{
throw new JsonSerializationException("No union type found with the name '{0}'.".FormatWith(CultureInfo.InvariantCulture, caseName));
}
ReadAndAssertProperty(reader, FieldsPropertyName);
// start array
ReadAndAssert(reader);
// first value
ReadAndAssert(reader);
PropertyInfo[] fieldProperties = (PropertyInfo[])FSharpUtils.GetUnionCaseInfoFields(matchingCaseInfo);
List <object> fieldValues = new List <object>();
foreach (PropertyInfo field in fieldProperties)
{
fieldValues.Add(serializer.Deserialize(reader, field.PropertyType));
ReadAndAssert(reader);
}
// end object
ReadAndAssert(reader);
return(FSharpUtils.MakeUnion(null, matchingCaseInfo, fieldValues.ToArray(), null));
}
/// <summary>
/// Reads the JSON representation of the object.
/// </summary>
/// <param name="reader">The <see cref="JsonReader"/> to read from.</param>
/// <param name="objectType">Type of the object.</param>
/// <param name="existingValue">The existing value of object being read.</param>
/// <param name="serializer">The calling serializer.</param>
/// <returns>The object value.</returns>
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
if (reader.TokenType == JsonToken.Null)
{
return(null);
}
object matchingCaseInfo = null;
string caseName = null;
JArray fields = null;
// start object
ReadAndAssert(reader);
while (reader.TokenType == JsonToken.PropertyName)
{
string propertyName = reader.Value.ToString();
if (string.Equals(propertyName, CasePropertyName, StringComparison.OrdinalIgnoreCase))
{
ReadAndAssert(reader);
IEnumerable cases = (IEnumerable)FSharpUtils.GetUnionCases(null, objectType, null);
caseName = reader.Value.ToString();
foreach (object c in cases)
{
if ((string)FSharpUtils.GetUnionCaseInfoName(c) == caseName)
{
matchingCaseInfo = c;
break;
}
}
if (matchingCaseInfo == null)
{
throw JsonSerializationException.Create(reader, "No union type found with the name '{0}'.".FormatWith(CultureInfo.InvariantCulture, caseName));
}
}
else if (string.Equals(propertyName, FieldsPropertyName, StringComparison.OrdinalIgnoreCase))
{
ReadAndAssert(reader);
if (reader.TokenType != JsonToken.StartArray)
{
throw JsonSerializationException.Create(reader, "Union fields must been an array.");
}
fields = (JArray)JToken.ReadFrom(reader);
}
else
{
throw JsonSerializationException.Create(reader, "Unexpected property '{0}' found when reading union.".FormatWith(CultureInfo.InvariantCulture, propertyName));
}
ReadAndAssert(reader);
}
if (matchingCaseInfo == null)
{
throw JsonSerializationException.Create(reader, "No '{0}' property with union name found.".FormatWith(CultureInfo.InvariantCulture, CasePropertyName));
}
if (fields == null)
{
throw JsonSerializationException.Create(reader, "No '{0}' property with union fields found.".FormatWith(CultureInfo.InvariantCulture, FieldsPropertyName));
}
PropertyInfo[] fieldProperties = (PropertyInfo[])FSharpUtils.GetUnionCaseInfoFields(matchingCaseInfo);
if (fieldProperties.Length != fields.Count)
{
throw JsonSerializationException.Create(reader, "The number of field values does not match the number of properties definied by union '{0}'.".FormatWith(CultureInfo.InvariantCulture, caseName));
}
object[] typedFieldValues = new object[fieldProperties.Length];
for (int i = 0; i < fields.Count; i++)
{
JToken t = fields[i];
PropertyInfo fieldProperty = fieldProperties[i];
typedFieldValues[i] = t.ToObject(fieldProperty.PropertyType);
}
return(FSharpUtils.MakeUnion(null, matchingCaseInfo, typedFieldValues, null));
}