protected bool IsErrorHandled(object currentObject, JsonContract contract, object keyValue, Exception ex)
{
ErrorContext errorContext = GetErrorContext(currentObject, keyValue, ex);
contract.InvokeOnError(currentObject, Serializer.Context, errorContext);
if (!errorContext.Handled)
Serializer.OnError(new ErrorEventArgs(currentObject, errorContext));
return errorContext.Handled;
}
private JsonArrayContract EnsureArrayContract(Type objectType, JsonContract contract)
{
if (contract == null)
throw new JsonSerializationException("Could not resolve type '{0}' to a JsonContract.".FormatWith(CultureInfo.InvariantCulture, objectType));
JsonArrayContract arrayContract = contract as JsonArrayContract;
if (arrayContract == null)
throw new JsonSerializationException("Cannot deserialize JSON array into type '{0}'.".FormatWith(CultureInfo.InvariantCulture, objectType));
return arrayContract;
}
private object CreateValueNonProperty(JsonReader reader, Type objectType, JsonContract contract)
{
JsonConverter converter = GetConverter(contract, null);
if (converter != null && converter.CanRead)
return converter.ReadJson(reader, objectType, null, GetInternalSerializer());
return CreateValueInternal(reader, objectType, contract, null, null);
}
private object CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, object existingValue)
{
if (contract is JsonLinqContract)
return CreateJToken(reader, contract);
do
{
switch (reader.TokenType)
{
// populate a typed object or generic dictionary/array
// depending upon whether an objectType was supplied
case JsonToken.StartObject:
return CreateObject(reader, objectType, contract, member, existingValue);
case JsonToken.StartArray:
return CreateList(reader, objectType, contract, member, existingValue, null);
case JsonToken.Integer:
case JsonToken.Float:
case JsonToken.Boolean:
case JsonToken.Date:
case JsonToken.Bytes:
return EnsureType(reader.Value, objectType);
case JsonToken.String:
// convert empty string to null automatically for nullable types
if (string.IsNullOrEmpty((string)reader.Value) &&
objectType != null &&
ReflectionUtils.IsNullableType(objectType))
return null;
// string that needs to be returned as a byte array should be base 64 decoded
if (objectType == typeof(byte[]))
return Convert.FromBase64String((string)reader.Value);
return EnsureType(reader.Value, objectType);
case JsonToken.StartConstructor:
case JsonToken.EndConstructor:
string constructorName = reader.Value.ToString();
return constructorName;
case JsonToken.Null:
case JsonToken.Undefined:
if (objectType == typeof (DBNull))
return DBNull.Value;
return EnsureType(reader.Value, objectType);
case JsonToken.Raw:
return new JRaw((string)reader.Value);
case JsonToken.Comment:
// ignore
break;
default:
throw new JsonSerializationException("Unexpected token while deserializing object: " + reader.TokenType);
}
} while (reader.Read());
throw new JsonSerializationException("Unexpected end when deserializing object.");
}
private object CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, object existingValue)
{
CheckedRead(reader);
string id = null;
if (reader.TokenType == JsonToken.PropertyName)
{
bool specialProperty;
do
{
string propertyName = reader.Value.ToString();
if (string.Equals(propertyName, JsonTypeReflector.RefPropertyName, StringComparison.Ordinal))
{
CheckedRead(reader);
if (reader.TokenType != JsonToken.String)
throw new JsonSerializationException("JSON reference {0} property must have a string value.".FormatWith(CultureInfo.InvariantCulture, JsonTypeReflector.RefPropertyName));
string reference = reader.Value.ToString();
CheckedRead(reader);
if (reader.TokenType == JsonToken.PropertyName)
throw new JsonSerializationException("Additional content found in JSON reference object. A JSON reference object should only have a {0} property.".FormatWith(CultureInfo.InvariantCulture, JsonTypeReflector.RefPropertyName));
return Serializer.ReferenceResolver.ResolveReference(reference);
}
else if (string.Equals(propertyName, JsonTypeReflector.TypePropertyName, StringComparison.Ordinal))
{
CheckedRead(reader);
string qualifiedTypeName = reader.Value.ToString();
CheckedRead(reader);
if ((((member != null) ? member.TypeNameHandling : null) ?? Serializer.TypeNameHandling) != TypeNameHandling.None)
{
string typeName;
string assemblyName;
ReflectionUtils.SplitFullyQualifiedTypeName(qualifiedTypeName, out typeName, out assemblyName);
Type specifiedType;
try
{
specifiedType = Serializer.Binder.BindToType(assemblyName, typeName);
}
catch (Exception ex)
{
throw new JsonSerializationException("Error resolving type specified in JSON '{0}'.".FormatWith(CultureInfo.InvariantCulture, qualifiedTypeName), ex);
}
if (specifiedType == null)
throw new JsonSerializationException("Type specified in JSON '{0}' was not resolved.".FormatWith(CultureInfo.InvariantCulture, qualifiedTypeName));
if (objectType != null && !objectType.IsAssignableFrom(specifiedType))
throw new JsonSerializationException("Type specified in JSON '{0}' is not compatible with '{1}'.".FormatWith(CultureInfo.InvariantCulture, specifiedType.AssemblyQualifiedName, objectType.AssemblyQualifiedName));
objectType = specifiedType;
contract = GetContractSafe(specifiedType);
}
specialProperty = true;
}
else if (string.Equals(propertyName, JsonTypeReflector.IdPropertyName, StringComparison.Ordinal))
{
CheckedRead(reader);
id = reader.Value.ToString();
CheckedRead(reader);
specialProperty = true;
}
else if (string.Equals(propertyName, JsonTypeReflector.ArrayValuesPropertyName, StringComparison.Ordinal))
{
CheckedRead(reader);
object list = CreateList(reader, objectType, contract, member, existingValue, id);
CheckedRead(reader);
return list;
}
else
{
specialProperty = false;
}
} while (specialProperty
&& reader.TokenType == JsonToken.PropertyName);
}
if (!HasDefinedType(objectType))
return CreateJObject(reader);
if (contract == null)
throw new JsonSerializationException("Could not resolve type '{0}' to a JsonContract.".FormatWith(CultureInfo.InvariantCulture, objectType));
JsonDictionaryContract dictionaryContract = contract as JsonDictionaryContract;
if (dictionaryContract != null)
{
if (existingValue == null)
return CreateAndPopulateDictionary(reader, dictionaryContract, id);
return PopulateDictionary(dictionaryContract.CreateWrapper(existingValue), reader, dictionaryContract, id);
}
JsonObjectContract objectContract = contract as JsonObjectContract;
if (objectContract != null)
{
if (existingValue == null)
return CreateAndPopulateObject(reader, objectContract, id);
return PopulateObject(existingValue, reader, objectContract, id);
}
#if !SILVERLIGHT && !PocketPC
JsonISerializableContract serializableContract = contract as JsonISerializableContract;
if (serializableContract != null)
{
return CreateISerializable(reader, serializableContract, id);
}
#endif
throw new JsonSerializationException("Cannot deserialize JSON object into type '{0}'.".FormatWith(CultureInfo.InvariantCulture, objectType));
}
private object CreateList(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, object existingValue, string reference)
{
object value;
if (HasDefinedType(objectType))
{
JsonArrayContract arrayContract = EnsureArrayContract(objectType, contract);
if (existingValue == null)
value = CreateAndPopulateList(reader, reference, arrayContract);
else
value = PopulateList(arrayContract.CreateWrapper(existingValue), reader, reference, arrayContract);
}
else
{
value = CreateJToken(reader, contract);
}
return value;
}
private JToken CreateJToken(JsonReader reader, JsonContract contract)
{
ValidationUtils.ArgumentNotNull(reader, "reader");
if (contract != null && contract.UnderlyingType == typeof(JRaw))
{
return JRaw.Create(reader);
}
else
{
JToken token;
using (JTokenWriter writer = new JTokenWriter())
{
writer.WriteToken(reader);
token = writer.Token;
}
return token;
}
}
private void SerializeConvertable(JsonWriter writer, JsonConverter converter, object value, JsonContract contract)
{
if (ShouldWriteReference(value, null, contract))
{
WriteReference(writer, value);
}
else
{
if (!CheckForCircularReference(value, null, contract))
return;
SerializeStack.Add(value);
converter.WriteJson(writer, value, GetInternalSerializer());
SerializeStack.RemoveAt(SerializeStack.Count - 1);
}
}
//private bool ShouldWriteTypeProperty(JsonProperty member, JsonContract contract, TypeNameHandling typeFlag)
//{
// if (HasFlag(((member != null) ? member.TypeNameHandling : null) ?? Serializer.TypeNameHandling, typeFlag))
// return true;
// if ((((member != null) ? member.TypeNameHandling : null) ?? Serializer.TypeNameHandling) == TypeNameHandling.Auto)
// || (member != null
// && (member.TypeNameHandling ?? Serializer.TypeNameHandling) == TypeNameHandling.Auto
// && contract.UnderlyingType != member.PropertyType)
// )
//}
private bool ShouldWriteType(TypeNameHandling typeNameHandlingFlag, JsonContract contract, JsonProperty member, JsonContract collectionValueContract)
{
if (HasFlag(((member != null) ? member.TypeNameHandling : null) ?? Serializer.TypeNameHandling, typeNameHandlingFlag))
return true;
if (member != null)
{
if ((member.TypeNameHandling ?? Serializer.TypeNameHandling) == TypeNameHandling.Auto && contract.UnderlyingType != member.PropertyType)
return true;
}
else if (collectionValueContract != null)
{
if (Serializer.TypeNameHandling == TypeNameHandling.Auto && contract.UnderlyingType != collectionValueContract.UnderlyingType)
return true;
}
return false;
}
private bool ShouldWriteReference(object value, JsonProperty property, JsonContract contract)
{
if (value == null)
return false;
if (contract is JsonPrimitiveContract)
return false;
bool? isReference = null;
// value could be coming from a dictionary or array and not have a property
if (property != null)
isReference = property.IsReference;
if (isReference == null)
isReference = contract.IsReference;
if (isReference == null)
{
if (contract is JsonArrayContract)
isReference = HasFlag(Serializer.PreserveReferencesHandling, PreserveReferencesHandling.Arrays);
else
isReference = HasFlag(Serializer.PreserveReferencesHandling, PreserveReferencesHandling.Objects);
}
if (!isReference.Value)
return false;
return Serializer.ReferenceResolver.IsReferenced(value);
}
private void SerializeValue(JsonWriter writer, object value, JsonContract valueContract, JsonProperty member, JsonContract collectionValueContract)
{
JsonConverter converter = (member != null) ? member.Converter : null;
if (value == null)
{
writer.WriteNull();
return;
}
if ((converter != null
|| ((converter = valueContract.Converter) != null)
|| ((converter = Serializer.GetMatchingConverter(valueContract.UnderlyingType)) != null)
|| ((converter = valueContract.InternalConverter) != null))
&& converter.CanWrite)
{
SerializeConvertable(writer, converter, value, valueContract);
}
else if (valueContract is JsonPrimitiveContract)
{
writer.WriteValue(value);
}
else if (valueContract is JsonStringContract)
{
SerializeString(writer, value, (JsonStringContract) valueContract);
}
else if (valueContract is JsonObjectContract)
{
SerializeObject(writer, value, (JsonObjectContract)valueContract, member, collectionValueContract);
}
else if (valueContract is JsonDictionaryContract)
{
JsonDictionaryContract dictionaryContract = (JsonDictionaryContract) valueContract;
SerializeDictionary(writer, dictionaryContract.CreateWrapper(value), dictionaryContract, member, collectionValueContract);
}
else if (valueContract is JsonArrayContract)
{
if (value is IList)
{
SerializeList(writer, (IList)value, (JsonArrayContract)valueContract, member, collectionValueContract);
}
else if (value is IEnumerable)
{
SerializeList(writer, ((IEnumerable)value).Cast<object>().ToList(), (JsonArrayContract)valueContract, member, collectionValueContract);
}
else
{
throw new Exception(
"Cannot serialize '{0}' into a JSON array. Type does not implement IEnumerable.".FormatWith(
CultureInfo.InvariantCulture, value.GetType()));
}
}
else if (valueContract is JsonLinqContract)
{
((JToken)value).WriteTo(writer, (Serializer.Converters != null) ? Serializer.Converters.ToArray() : null);
}
#if !SILVERLIGHT && !PocketPC
else if (valueContract is JsonISerializableContract)
{
SerializeISerializable(writer, (ISerializable) value, (JsonISerializableContract) valueContract);
}
#endif
}
private void SerializeObject(JsonWriter writer, object value, JsonObjectContract contract, JsonProperty member, JsonContract collectionValueContract)
{
contract.InvokeOnSerializing(value, Serializer.Context);
SerializeStack.Add(value);
writer.WriteStartObject();
bool isReference = contract.IsReference ?? HasFlag(Serializer.PreserveReferencesHandling, PreserveReferencesHandling.Objects);
if (isReference)
{
writer.WritePropertyName(JsonTypeReflector.IdPropertyName);
writer.WriteValue(Serializer.ReferenceResolver.GetReference(value));
}
if (ShouldWriteType(TypeNameHandling.Objects, contract, member, collectionValueContract))
{
WriteTypeProperty(writer, contract.UnderlyingType);
}
int initialDepth = writer.Top;
foreach (JsonProperty property in contract.Properties)
{
try
{
if (!property.Ignored && property.Readable && ShouldSerialize(property, value))
{
object memberValue = property.ValueProvider.GetValue(value);
JsonContract memberContract = GetContractSafe(memberValue);
WriteMemberInfoProperty(writer, memberValue, property, memberContract);
}
}
catch (Exception ex)
{
if (IsErrorHandled(value, contract, property.PropertyName, ex))
HandleError(writer, initialDepth);
else
throw;
}
}
writer.WriteEndObject();
SerializeStack.RemoveAt(SerializeStack.Count - 1);
contract.InvokeOnSerialized(value, Serializer.Context);
}
private void SerializeList(JsonWriter writer, IList values, JsonArrayContract contract, JsonProperty member, JsonContract collectionValueContract)
{
contract.InvokeOnSerializing(values, Serializer.Context);
SerializeStack.Add(values);
bool isReference = contract.IsReference ?? HasFlag(Serializer.PreserveReferencesHandling, PreserveReferencesHandling.Arrays);
bool includeTypeDetails = ShouldWriteType(TypeNameHandling.Arrays, contract, member, collectionValueContract);
if (isReference || includeTypeDetails)
{
writer.WriteStartObject();
if (isReference)
{
writer.WritePropertyName(JsonTypeReflector.IdPropertyName);
writer.WriteValue(Serializer.ReferenceResolver.GetReference(values));
}
if (includeTypeDetails)
{
WriteTypeProperty(writer, values.GetType());
}
writer.WritePropertyName(JsonTypeReflector.ArrayValuesPropertyName);
}
JsonContract childValuesContract = Serializer.ContractResolver.ResolveContract(contract.CollectionItemType ?? typeof(object));
writer.WriteStartArray();
int initialDepth = writer.Top;
for (int i = 0; i < values.Count; i++)
{
try
{
object value = values[i];
JsonContract valueContract = GetContractSafe(value);
if (ShouldWriteReference(value, null, valueContract))
{
WriteReference(writer, value);
}
else
{
if (!CheckForCircularReference(value, null, contract))
continue;
SerializeValue(writer, value, valueContract, null, childValuesContract);
}
}
catch (Exception ex)
{
if (IsErrorHandled(values, contract, i, ex))
HandleError(writer, initialDepth);
else
throw;
}
}
writer.WriteEndArray();
if (isReference || includeTypeDetails)
{
writer.WriteEndObject();
}
SerializeStack.RemoveAt(SerializeStack.Count - 1);
contract.InvokeOnSerialized(values, Serializer.Context);
}
private void SerializeDictionary(JsonWriter writer, IWrappedDictionary values, JsonDictionaryContract contract, JsonProperty member, JsonContract collectionValueContract)
{
contract.InvokeOnSerializing(values.UnderlyingDictionary, Serializer.Context);
SerializeStack.Add(values.UnderlyingDictionary);
writer.WriteStartObject();
bool isReference = contract.IsReference ?? HasFlag(Serializer.PreserveReferencesHandling, PreserveReferencesHandling.Objects);
if (isReference)
{
writer.WritePropertyName(JsonTypeReflector.IdPropertyName);
writer.WriteValue(Serializer.ReferenceResolver.GetReference(values.UnderlyingDictionary));
}
if (ShouldWriteType(TypeNameHandling.Objects, contract, member, collectionValueContract))
{
WriteTypeProperty(writer, values.UnderlyingDictionary.GetType());
}
JsonContract childValuesContract = Serializer.ContractResolver.ResolveContract(contract.DictionaryValueType ?? typeof(object));
int initialDepth = writer.Top;
// Mono Unity 3.0 fix
IDictionary d = values;
foreach (DictionaryEntry entry in d)
{
string propertyName = GetPropertyName(entry);
try
{
object value = entry.Value;
JsonContract valueContract = GetContractSafe(value);
if (ShouldWriteReference(value, null, valueContract))
{
writer.WritePropertyName(propertyName);
WriteReference(writer, value);
}
else
{
if (!CheckForCircularReference(value, null, contract))
continue;
writer.WritePropertyName(propertyName);
SerializeValue(writer, value, valueContract, null, childValuesContract);
}
}
catch (Exception ex)
{
if (IsErrorHandled(values.UnderlyingDictionary, contract, propertyName, ex))
HandleError(writer, initialDepth);
else
throw;
}
}
writer.WriteEndObject();
SerializeStack.RemoveAt(SerializeStack.Count - 1);
contract.InvokeOnSerialized(values.UnderlyingDictionary, Serializer.Context);
}
private JsonConverter GetConverter(JsonContract contract, JsonConverter memberConverter)
{
JsonConverter converter = null;
if (memberConverter != null)
{
// member attribute converter
converter = memberConverter;
}
else if (contract != null)
{
JsonConverter matchingConverter;
if (contract.Converter != null)
// class attribute converter
converter = contract.Converter;
else if ((matchingConverter = Serializer.GetMatchingConverter(contract.UnderlyingType)) != null)
// passed in converters
converter = matchingConverter;
else if (contract.InternalConverter != null)
// internally specified converter
converter = contract.InternalConverter;
}
return converter;
}
private void WriteMemberInfoProperty(JsonWriter writer, object memberValue, JsonProperty property, JsonContract contract)
{
string propertyName = property.PropertyName;
object defaultValue = property.DefaultValue;
if (property.NullValueHandling.GetValueOrDefault(Serializer.NullValueHandling) == NullValueHandling.Ignore &&
memberValue == null)
return;
if (property.DefaultValueHandling.GetValueOrDefault(Serializer.DefaultValueHandling) ==
DefaultValueHandling.Ignore && Equals(memberValue, defaultValue))
return;
if (ShouldWriteReference(memberValue, property, contract))
{
writer.WritePropertyName(propertyName);
WriteReference(writer, memberValue);
return;
}
if (!CheckForCircularReference(memberValue, property.ReferenceLoopHandling, contract))
return;
if (memberValue == null && property.Required == Required.Always)
throw new JsonSerializationException("Cannot write a null value for property '{0}'. Property requires a value.".FormatWith(CultureInfo.InvariantCulture, property.PropertyName));
writer.WritePropertyName(propertyName);
SerializeValue(writer, memberValue, contract, property, null);
}
private bool CheckForCircularReference(object value, ReferenceLoopHandling? referenceLoopHandling, JsonContract contract)
{
if (value == null || contract is JsonPrimitiveContract)
return true;
if (SerializeStack.IndexOf(value) != -1)
{
switch (referenceLoopHandling.GetValueOrDefault(Serializer.ReferenceLoopHandling))
{
case ReferenceLoopHandling.Error:
throw new JsonSerializationException("Self referencing loop");
case ReferenceLoopHandling.Ignore:
return false;
case ReferenceLoopHandling.Serialize:
return true;
default:
throw new InvalidOperationException("Unexpected ReferenceLoopHandling value: '{0}'".FormatWith(CultureInfo.InvariantCulture, Serializer.ReferenceLoopHandling));
}
}
return true;
}
