private void SerializeList(JsonWriter writer, IEnumerable values, JsonArrayContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)
{
IWrappedCollection wrappedCollection = values as IWrappedCollection;
object underlyingList = wrappedCollection != null ? wrappedCollection.UnderlyingCollection : values;
OnSerializing(writer, contract, underlyingList);
_serializeStack.Add(underlyingList);
bool hasWrittenMetadataObject = WriteStartArray(writer, underlyingList, contract, member, collectionContract, containerProperty);
writer.WriteStartArray();
int initialDepth = writer.Top;
int index = 0;
// note that an error in the IEnumerable won't be caught
foreach (object value in values)
{
try
{
JsonContract valueContract = contract.FinalItemContract ?? GetContractSafe(value);
if (ShouldWriteReference(value, null, valueContract, contract, member))
{
WriteReference(writer, value);
}
else
{
if (CheckForCircularReference(writer, value, null, valueContract, contract, member))
{
SerializeValue(writer, value, valueContract, null, contract, member);
}
}
}
catch (Exception ex)
{
if (IsErrorHandled(underlyingList, contract, index, null, writer.ContainerPath, ex))
HandleError(writer, initialDepth);
else
throw;
}
finally
{
index++;
}
}
writer.WriteEndArray();
if (hasWrittenMetadataObject)
writer.WriteEndObject();
_serializeStack.RemoveAt(_serializeStack.Count - 1);
OnSerialized(writer, contract, underlyingList);
}
private void SerializeMultidimensionalArray(JsonWriter writer, Array values, JsonArrayContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)
{
OnSerializing(writer, contract, values);
_serializeStack.Add(values);
bool hasWrittenMetadataObject = WriteStartArray(writer, values, contract, member, collectionContract, containerProperty);
SerializeMultidimensionalArray(writer, values, contract, member, writer.Top, new int[0]);
if (hasWrittenMetadataObject)
writer.WriteEndObject();
_serializeStack.RemoveAt(_serializeStack.Count - 1);
OnSerialized(writer, contract, values);
}
private bool ReadMetadataProperties(JsonReader reader, ref Type objectType, ref JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, object existingValue, out object newValue, out string id)
{
id = null;
newValue = null;
if (reader.TokenType == JsonToken.PropertyName)
{
string propertyName = reader.Value.ToString();
if (propertyName.Length > 0 && propertyName[0] == '$')
{
// read metadata properties
// $type, $id, $ref, etc
bool metadataProperty;
do
{
propertyName = reader.Value.ToString();
if (string.Equals(propertyName, JsonTypeReflector.RefPropertyName, StringComparison.Ordinal))
{
CheckedRead(reader);
if (reader.TokenType != JsonToken.String && reader.TokenType != JsonToken.Null)
throw JsonSerializationException.Create(reader, "JSON reference {0} property must have a string or null value.".FormatWith(CultureInfo.InvariantCulture, JsonTypeReflector.RefPropertyName));
string reference = (reader.Value != null) ? reader.Value.ToString() : null;
CheckedRead(reader);
if (reference != null)
{
if (reader.TokenType == JsonToken.PropertyName)
throw JsonSerializationException.Create(reader, "Additional content found in JSON reference object. A JSON reference object should only have a {0} property.".FormatWith(CultureInfo.InvariantCulture, JsonTypeReflector.RefPropertyName));
newValue = Serializer.GetReferenceResolver().ResolveReference(this, reference);
//if (TraceWriter != null && TraceWriter.LevelFilter >= TraceLevel.Info)
// TraceWriter.Trace(TraceLevel.Info, JsonPosition.FormatMessage(reader as IJsonLineInfo, reader.Path, "Resolved object reference '{0}' to {1}.".FormatWith(CultureInfo.InvariantCulture, reference, newValue.GetType())), null);
return true;
}
else
{
metadataProperty = true;
}
}
else if (string.Equals(propertyName, JsonTypeReflector.TypePropertyName, StringComparison.Ordinal))
{
CheckedRead(reader);
string qualifiedTypeName = reader.Value.ToString();
ResolveTypeName(reader, ref objectType, ref contract, member, containerContract, containerMember, qualifiedTypeName);
CheckedRead(reader);
metadataProperty = true;
}
else if (string.Equals(propertyName, JsonTypeReflector.IdPropertyName, StringComparison.Ordinal))
{
CheckedRead(reader);
id = (reader.Value != null) ? reader.Value.ToString() : null;
CheckedRead(reader);
metadataProperty = true;
}
else if (string.Equals(propertyName, JsonTypeReflector.ArrayValuesPropertyName, StringComparison.Ordinal))
{
CheckedRead(reader);
object list = CreateList(reader, objectType, contract, member, existingValue, id);
CheckedRead(reader);
newValue = list;
return true;
}
else
{
metadataProperty = false;
}
} while (metadataProperty && reader.TokenType == JsonToken.PropertyName);
}
}
return false;
}
private void SerializeDictionary(JsonWriter writer, IDictionary values, JsonDictionaryContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)
{
IWrappedDictionary wrappedDictionary = values as IWrappedDictionary;
object underlyingDictionary = wrappedDictionary != null ? wrappedDictionary.UnderlyingDictionary : values;
OnSerializing(writer, contract, underlyingDictionary);
_serializeStack.Add(underlyingDictionary);
WriteObjectStart(writer, underlyingDictionary, contract, member, collectionContract, containerProperty);
if (contract.ItemContract == null)
contract.ItemContract = Serializer._contractResolver.ResolveContract(contract.DictionaryValueType ?? typeof(object));
if (contract.KeyContract == null)
contract.KeyContract = Serializer._contractResolver.ResolveContract(contract.DictionaryKeyType ?? typeof(object));
int initialDepth = writer.Top;
foreach (DictionaryEntry entry in values)
{
bool escape;
string propertyName = GetPropertyName(writer, entry.Key, contract.KeyContract, out escape);
propertyName = (contract.PropertyNameResolver != null)
? contract.PropertyNameResolver(propertyName)
: propertyName;
try
{
object value = entry.Value;
JsonContract valueContract = contract.FinalItemContract ?? GetContractSafe(value);
if (ShouldWriteReference(value, null, valueContract, contract, member))
{
writer.WritePropertyName(propertyName, escape);
WriteReference(writer, value);
}
else
{
if (!CheckForCircularReference(writer, value, null, valueContract, contract, member))
continue;
writer.WritePropertyName(propertyName, escape);
SerializeValue(writer, value, valueContract, null, contract, member);
}
}
catch (Exception ex)
{
if (IsErrorHandled(underlyingDictionary, contract, propertyName, null, writer.ContainerPath, ex))
HandleError(writer, initialDepth);
else
throw;
}
}
writer.WriteEndObject();
_serializeStack.RemoveAt(_serializeStack.Count - 1);
OnSerialized(writer, contract, underlyingDictionary);
}
private bool ShouldWriteType(TypeNameHandling typeNameHandlingFlag, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)
{
TypeNameHandling resolvedTypeNameHandling =
((member != null) ? member.TypeNameHandling : null)
?? ((containerProperty != null) ? containerProperty.ItemTypeNameHandling : null)
?? ((containerContract != null) ? containerContract.ItemTypeNameHandling : null)
?? Serializer._typeNameHandling;
if (HasFlag(resolvedTypeNameHandling, typeNameHandlingFlag))
return true;
// instance type and the property's type's contract default type are different (no need to put the type in JSON because the type will be created by default)
if (HasFlag(resolvedTypeNameHandling, TypeNameHandling.Auto))
{
if (member != null)
{
if (contract.UnderlyingType != member.PropertyContract.CreatedType)
return true;
}
else if (containerContract != null)
{
if (containerContract.ItemContract == null || contract.UnderlyingType != containerContract.ItemContract.CreatedType)
return true;
}
else if (_rootContract != null && _serializeStack.Count == _rootLevel)
{
if (contract.UnderlyingType != _rootContract.CreatedType)
return true;
}
}
return false;
}
private bool WriteStartArray(JsonWriter writer, object values, JsonArrayContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)
{
bool isReference = ResolveIsReference(contract, member, containerContract, containerProperty) ?? HasFlag(Serializer._preserveReferencesHandling, PreserveReferencesHandling.Arrays);
// don't make readonly fields the referenced value because they can't be deserialized to
isReference = (isReference && (member == null || member.Writable));
bool includeTypeDetails = ShouldWriteType(TypeNameHandling.Arrays, contract, member, containerContract, containerProperty);
bool writeMetadataObject = isReference || includeTypeDetails;
if (writeMetadataObject)
{
writer.WriteStartObject();
if (isReference)
{
WriteReferenceIdProperty(writer, contract.UnderlyingType, values);
}
if (includeTypeDetails)
{
WriteTypeProperty(writer, values.GetType());
}
writer.WritePropertyName(JsonTypeReflector.ArrayValuesPropertyName, false);
}
if (contract.ItemContract == null)
contract.ItemContract = Serializer._contractResolver.ResolveContract(contract.CollectionItemType ?? typeof(object));
return writeMetadataObject;
}
private object CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, object existingValue)
{
if (contract != null && contract.ContractType == JsonContractType.Linq)
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, containerContract, containerMember, 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, reader.Value, CultureInfo.InvariantCulture, contract, objectType);
case JsonToken.String:
string s = (string)reader.Value;
// convert empty string to null automatically for nullable types
if (string.IsNullOrEmpty(s) && objectType != null && objectType != typeof(string) && objectType != typeof(object) && contract != null && contract.IsNullable)
return null;
// string that needs to be returned as a byte array should be base 64 decoded
if (objectType == typeof(byte[]))
return Convert.FromBase64String(s);
return EnsureType(reader, s, CultureInfo.InvariantCulture, contract, objectType);
case JsonToken.StartConstructor:
string constructorName = reader.Value.ToString();
return EnsureType(reader, constructorName, CultureInfo.InvariantCulture, contract, objectType);
case JsonToken.Null:
case JsonToken.Undefined:
return EnsureType(reader, reader.Value, CultureInfo.InvariantCulture, contract, objectType);
case JsonToken.Raw:
return new JRaw((string)reader.Value);
case JsonToken.Comment:
// ignore
break;
default:
throw JsonSerializationException.Create(reader, "Unexpected token while deserializing object: " + reader.TokenType);
}
} while (reader.Read());
throw JsonSerializationException.Create(reader, "Unexpected end when deserializing object.");
}
private void SerializeValue(JsonWriter writer, object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)
{
if (value == null)
{
writer.WriteNull();
return;
}
JsonConverter converter =
((member != null) ? member.Converter : null) ??
((containerProperty != null) ? containerProperty.ItemConverter : null) ??
((containerContract != null) ? containerContract.ItemConverter : null) ??
valueContract.Converter ??
Serializer.GetMatchingConverter(valueContract.UnderlyingType) ??
valueContract.InternalConverter;
if (converter != null && converter.CanWrite)
{
SerializeConvertable(writer, converter, value, valueContract, containerContract, containerProperty);
return;
}
switch (valueContract.ContractType)
{
case JsonContractType.Object:
SerializeObject(writer, value, (JsonObjectContract)valueContract, member, containerContract, containerProperty);
break;
case JsonContractType.Array:
JsonArrayContract arrayContract = (JsonArrayContract)valueContract;
if (!arrayContract.IsMultidimensionalArray)
SerializeList(writer, (IEnumerable)value, arrayContract, member, containerContract, containerProperty);
else
SerializeMultidimensionalArray(writer, (Array)value, arrayContract, member, containerContract, containerProperty);
break;
case JsonContractType.Primitive:
SerializePrimitive(writer, value, (JsonPrimitiveContract)valueContract, member, containerContract, containerProperty);
break;
case JsonContractType.String:
SerializeString(writer, value, (JsonStringContract)valueContract);
break;
case JsonContractType.Dictionary:
JsonDictionaryContract dictionaryContract = (JsonDictionaryContract)valueContract;
SerializeDictionary(writer, (value is IDictionary) ? (IDictionary)value : dictionaryContract.CreateWrapper(value), dictionaryContract, member, containerContract, containerProperty);
break;
case JsonContractType.Dynamic:
SerializeDynamic(writer, (IDynamicMetaObjectProvider)value, (JsonDynamicContract)valueContract, member, containerContract, containerProperty);
break;
case JsonContractType.Linq:
((JToken)value).WriteTo(writer, Serializer.Converters.ToArray());
break;
}
}
private bool CalculatePropertyDetails(JsonProperty property, ref JsonConverter propertyConverter, JsonContainerContract containerContract, JsonProperty containerProperty, JsonReader reader, object target, out bool useExistingValue, out object currentValue, out JsonContract propertyContract, out bool gottenCurrentValue)
{
currentValue = null;
useExistingValue = false;
propertyContract = null;
gottenCurrentValue = false;
if (property.Ignored)
return true;
JsonToken tokenType = reader.TokenType;
if (property.PropertyContract == null)
property.PropertyContract = GetContractSafe(property.PropertyType);
ObjectCreationHandling objectCreationHandling =
property.ObjectCreationHandling.GetValueOrDefault(Serializer._objectCreationHandling);
if ((objectCreationHandling != ObjectCreationHandling.Replace)
&& (tokenType == JsonToken.StartArray || tokenType == JsonToken.StartObject)
&& property.Readable)
{
currentValue = property.ValueProvider.GetValue(target);
gottenCurrentValue = true;
if (currentValue != null)
{
propertyContract = GetContractSafe(currentValue.GetType());
useExistingValue = (!propertyContract.IsReadOnlyOrFixedSize && !propertyContract.UnderlyingType.IsValueType());
}
}
if (!property.Writable && !useExistingValue)
return true;
// 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 && tokenType == JsonToken.Null)
return true;
// 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)
&& !HasFlag(property.DefaultValueHandling.GetValueOrDefault(Serializer._defaultValueHandling), DefaultValueHandling.Populate)
&& JsonTokenUtils.IsPrimitiveToken(tokenType)
&& MiscellaneousUtils.ValueEquals(reader.Value, property.GetResolvedDefaultValue()))
return true;
if (currentValue == null)
{
propertyContract = property.PropertyContract;
}
else
{
propertyContract = GetContractSafe(currentValue.GetType());
if (propertyContract != property.PropertyContract)
propertyConverter = GetConverter(propertyContract, property.MemberConverter, containerContract, containerProperty);
}
return false;
}
private object CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, object existingValue)
{
string id;
Type resolvedObjectType = objectType;
if (Serializer.MetadataPropertyHandling == MetadataPropertyHandling.Ignore)
{
// don't look for metadata properties
CheckedRead(reader);
id = null;
}
else if (Serializer.MetadataPropertyHandling == MetadataPropertyHandling.ReadAhead)
{
var tokenReader = reader as JTokenReader;
if (tokenReader == null)
{
JToken t = JToken.ReadFrom(reader);
tokenReader = (JTokenReader)t.CreateReader();
tokenReader.Culture = reader.Culture;
tokenReader.DateFormatString = reader.DateFormatString;
tokenReader.DateParseHandling = reader.DateParseHandling;
tokenReader.DateTimeZoneHandling = reader.DateTimeZoneHandling;
tokenReader.FloatParseHandling = reader.FloatParseHandling;
tokenReader.SupportMultipleContent = reader.SupportMultipleContent;
// start
CheckedRead(tokenReader);
reader = tokenReader;
}
object newValue;
if (ReadMetadataPropertiesToken(tokenReader, ref resolvedObjectType, ref contract, member, containerContract, containerMember, existingValue, out newValue, out id))
return newValue;
}
else
{
CheckedRead(reader);
object newValue;
if (ReadMetadataProperties(reader, ref resolvedObjectType, ref contract, member, containerContract, containerMember, existingValue, out newValue, out id))
return newValue;
}
if (HasNoDefinedType(contract))
return CreateJObject(reader);
switch (contract.ContractType)
{
case JsonContractType.Object:
{
bool createdFromNonDefaultCreator = false;
JsonObjectContract objectContract = (JsonObjectContract)contract;
object targetObject;
// check that if type name handling is being used that the existing value is compatible with the specified type
if (existingValue != null && (resolvedObjectType == objectType || resolvedObjectType.IsAssignableFrom(existingValue.GetType())))
targetObject = existingValue;
else
targetObject = CreateNewObject(reader, objectContract, member, containerMember, id, out createdFromNonDefaultCreator);
// don't populate if read from non-default creator because the object has already been read
if (createdFromNonDefaultCreator)
return targetObject;
return PopulateObject(targetObject, reader, objectContract, member, id);
}
case JsonContractType.Primitive:
{
JsonPrimitiveContract primitiveContract = (JsonPrimitiveContract)contract;
// if the content is inside $value then read past it
if (Serializer.MetadataPropertyHandling != MetadataPropertyHandling.Ignore
&& reader.TokenType == JsonToken.PropertyName
&& string.Equals(reader.Value.ToString(), JsonTypeReflector.ValuePropertyName, StringComparison.Ordinal))
{
CheckedRead(reader);
// the token should not be an object because the $type value could have been included in the object
// without needing the $value property
if (reader.TokenType == JsonToken.StartObject)
throw JsonSerializationException.Create(reader, "Unexpected token when deserializing primitive value: " + reader.TokenType);
object value = CreateValueInternal(reader, resolvedObjectType, primitiveContract, member, null, null, existingValue);
CheckedRead(reader);
return value;
}
break;
}
case JsonContractType.Dictionary:
{
JsonDictionaryContract dictionaryContract = (JsonDictionaryContract)contract;
object targetDictionary;
if (existingValue == null)
{
bool createdFromNonDefaultCreator;
IDictionary dictionary = CreateNewDictionary(reader, dictionaryContract, out createdFromNonDefaultCreator);
if (createdFromNonDefaultCreator)
{
if (id != null)
throw JsonSerializationException.Create(reader, "Cannot preserve reference to readonly dictionary, or dictionary created from a non-default constructor: {0}.".FormatWith(CultureInfo.InvariantCulture, contract.UnderlyingType));
if (contract.OnSerializingCallbacks.Count > 0)
throw JsonSerializationException.Create(reader, "Cannot call OnSerializing on readonly dictionary, or dictionary created from a non-default constructor: {0}.".FormatWith(CultureInfo.InvariantCulture, contract.UnderlyingType));
if (contract.OnErrorCallbacks.Count > 0)
throw JsonSerializationException.Create(reader, "Cannot call OnError on readonly list, or dictionary created from a non-default constructor: {0}.".FormatWith(CultureInfo.InvariantCulture, contract.UnderlyingType));
if (!dictionaryContract.HasParametrizedCreator)
throw JsonSerializationException.Create(reader, "Cannot deserialize readonly or fixed size dictionary: {0}.".FormatWith(CultureInfo.InvariantCulture, contract.UnderlyingType));
}
PopulateDictionary(dictionary, reader, dictionaryContract, member, id);
if (createdFromNonDefaultCreator)
{
return dictionaryContract.ParametrizedCreator(dictionary);
}
else if (dictionary is IWrappedDictionary)
{
return ((IWrappedDictionary)dictionary).UnderlyingDictionary;
}
targetDictionary = dictionary;
}
else
{
targetDictionary = PopulateDictionary(dictionaryContract.ShouldCreateWrapper ? dictionaryContract.CreateWrapper(existingValue) : (IDictionary)existingValue, reader, dictionaryContract, member, id);
}
return targetDictionary;
}
case JsonContractType.Dynamic:
JsonDynamicContract dynamicContract = (JsonDynamicContract)contract;
return CreateDynamic(reader, dynamicContract, member, id);
}
string message = @"Cannot deserialize the current JSON object (e.g. {{""name"":""value""}}) into type '{0}' because the type requires a {1} to deserialize correctly." + Environment.NewLine +
@"To fix this error either change the JSON to a {1} or change the deserialized type so that it is a normal .NET type (e.g. not a primitive type like integer, not a collection type like an array or List<T>) that can be deserialized from a JSON object. JsonObjectAttribute can also be added to the type to force it to deserialize from a JSON object." + Environment.NewLine;
message = message.FormatWith(CultureInfo.InvariantCulture, resolvedObjectType, GetExpectedDescription(contract));
throw JsonSerializationException.Create(reader, message);
}
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)
{
property.SetIsSpecified(target, true);
}
return true;
}
// the value wasn't set be JSON was populated onto the existing value
return useExistingValue;
}
private void ResolveTypeName(JsonReader reader, ref Type objectType, ref JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, string qualifiedTypeName)
{
TypeNameHandling resolvedTypeNameHandling =
((member != null) ? member.TypeNameHandling : null)
?? ((containerContract != null) ? containerContract.ItemTypeNameHandling : null)
?? ((containerMember != null) ? containerMember.ItemTypeNameHandling : null)
?? Serializer._typeNameHandling;
if (resolvedTypeNameHandling != 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 JsonSerializationException.Create(reader, "Error resolving type specified in JSON '{0}'.".FormatWith(CultureInfo.InvariantCulture, qualifiedTypeName), ex);
}
if (specifiedType == null)
throw JsonSerializationException.Create(reader, "Type specified in JSON '{0}' was not resolved.".FormatWith(CultureInfo.InvariantCulture, qualifiedTypeName));
if (objectType != null
&& !objectType.IsAssignableFrom(specifiedType))
throw JsonSerializationException.Create(reader, "Type specified in JSON '{0}' is not compatible with '{1}'.".FormatWith(CultureInfo.InvariantCulture, specifiedType.AssemblyQualifiedName, objectType.AssemblyQualifiedName));
objectType = specifiedType;
contract = GetContractSafe(specifiedType);
}
}
private bool ReadMetadataPropertiesToken(JTokenReader reader, ref Type objectType, ref JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, object existingValue, out object newValue, out string id)
{
id = null;
newValue = null;
if (reader.TokenType == JsonToken.StartObject)
{
JObject current = (JObject)reader.CurrentToken;
JToken refToken = current[JsonTypeReflector.RefPropertyName];
if (refToken != null)
{
if (refToken.Type != JTokenType.String && refToken.Type != JTokenType.Null)
throw JsonSerializationException.Create(refToken, refToken.Path, "JSON reference {0} property must have a string or null value.".FormatWith(CultureInfo.InvariantCulture, JsonTypeReflector.RefPropertyName), null);
JToken property = refToken.Parent;
JToken additionalContent = null;
if (property.Next != null)
additionalContent = property.Next;
else if (property.Previous != null)
additionalContent = property.Previous;
string reference = (string)refToken;
if (reference != null)
{
if (additionalContent != null)
throw JsonSerializationException.Create(additionalContent, additionalContent.Path, "Additional content found in JSON reference object. A JSON reference object should only have a {0} property.".FormatWith(CultureInfo.InvariantCulture, JsonTypeReflector.RefPropertyName), null);
newValue = Serializer.GetReferenceResolver().ResolveReference(this, reference);
//if (TraceWriter != null && TraceWriter.LevelFilter >= TraceLevel.Info)
// TraceWriter.Trace(TraceLevel.Info, JsonPosition.FormatMessage(reader as IJsonLineInfo, reader.Path, "Resolved object reference '{0}' to {1}.".FormatWith(CultureInfo.InvariantCulture, reference, newValue.GetType())), null);
reader.Skip();
return true;
}
}
JToken typeToken = current[JsonTypeReflector.TypePropertyName];
if (typeToken != null)
{
string qualifiedTypeName = (string)typeToken;
JsonReader typeTokenReader = typeToken.CreateReader();
CheckedRead(typeTokenReader);
ResolveTypeName(typeTokenReader, ref objectType, ref contract, member, containerContract, containerMember, qualifiedTypeName);
JToken valueToken = current[JsonTypeReflector.ValuePropertyName];
if (valueToken != null)
{
while (true)
{
CheckedRead(reader);
if (reader.TokenType == JsonToken.PropertyName)
{
if ((string)reader.Value == JsonTypeReflector.ValuePropertyName)
return false;
}
CheckedRead(reader);
reader.Skip();
}
}
}
JToken idToken = current[JsonTypeReflector.IdPropertyName];
if (idToken != null)
{
id = (string)idToken;
}
JToken valuesToken = current[JsonTypeReflector.ArrayValuesPropertyName];
if (valuesToken != null)
{
JsonReader listReader = valuesToken.CreateReader();
CheckedRead(listReader);
newValue = CreateList(listReader, objectType, contract, member, existingValue, id);
reader.Skip();
return true;
}
}
CheckedRead(reader);
return false;
}
private void SerializeObject(JsonWriter writer, object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)
{
OnSerializing(writer, contract, value);
_serializeStack.Add(value);
WriteObjectStart(writer, value, contract, member, collectionContract, containerProperty);
int initialDepth = writer.Top;
for (int index = 0; index < contract.Properties.Count; index++)
{
JsonProperty property = contract.Properties[index];
try
{
object memberValue;
JsonContract memberContract;
if (!CalculatePropertyValues(writer, value, contract, member, property, out memberContract, out memberValue))
continue;
property.WritePropertyName(writer);
SerializeValue(writer, memberValue, memberContract, property, contract, member);
}
catch (Exception ex)
{
if (IsErrorHandled(value, contract, property.PropertyName, null, writer.ContainerPath, ex))
HandleError(writer, initialDepth);
else
throw;
}
}
if (contract.ExtensionDataGetter != null)
{
IEnumerable<KeyValuePair<object, object>> extensionData = contract.ExtensionDataGetter(value);
if (extensionData != null)
{
foreach (KeyValuePair<object, object> e in extensionData)
{
JsonContract keyContract = GetContractSafe(e.Key);
JsonContract valueContract = GetContractSafe(e.Value);
bool escape;
string propertyName = GetPropertyName(writer, e.Key, keyContract, out escape);
if (ShouldWriteReference(e.Value, null, valueContract, contract, member))
{
writer.WritePropertyName(propertyName);
WriteReference(writer, e.Value);
}
else
{
if (!CheckForCircularReference(writer, e.Value, null, valueContract, contract, member))
continue;
writer.WritePropertyName(propertyName);
SerializeValue(writer, e.Value, valueContract, null, contract, member);
}
}
}
}
writer.WriteEndObject();
_serializeStack.RemoveAt(_serializeStack.Count - 1);
OnSerialized(writer, contract, value);
}
private bool CalculatePropertyValues(JsonWriter writer, object value, JsonContainerContract contract, JsonProperty member, JsonProperty property, out JsonContract memberContract, out object memberValue)
{
if (!property.Ignored && property.Readable && ShouldSerialize(writer, property, value) && IsSpecified(writer, property, value))
{
if (property.PropertyContract == null)
property.PropertyContract = Serializer._contractResolver.ResolveContract(property.PropertyType);
memberValue = property.ValueProvider.GetValue(value);
memberContract = (property.PropertyContract.IsSealed) ? property.PropertyContract : GetContractSafe(memberValue);
if (ShouldWriteProperty(memberValue, property))
{
if (ShouldWriteReference(memberValue, property, memberContract, contract, member))
{
property.WritePropertyName(writer);
WriteReference(writer, memberValue);
return false;
}
if (!CheckForCircularReference(writer, memberValue, property, memberContract, contract, member))
return false;
if (memberValue == null)
{
JsonObjectContract objectContract = contract as JsonObjectContract;
Required resolvedRequired = property._required ?? ((objectContract != null) ? objectContract.ItemRequired : null) ?? Required.Default;
if (resolvedRequired == Required.Always)
throw JsonSerializationException.Create(null, writer.ContainerPath, "Cannot write a null value for property '{0}'. Property requires a value.".FormatWith(CultureInfo.InvariantCulture, property.PropertyName), null);
}
return true;
}
}
memberContract = null;
memberValue = null;
return false;
}
private void SerializePrimitive(JsonWriter writer, object value, JsonPrimitiveContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)
{
if (contract.TypeCode == PrimitiveTypeCode.Bytes)
{
// if type name handling is enabled then wrap the base64 byte string in an object with the type name
bool includeTypeDetails = ShouldWriteType(TypeNameHandling.Objects, contract, member, containerContract, containerProperty);
if (includeTypeDetails)
{
writer.WriteStartObject();
WriteTypeProperty(writer, contract.CreatedType);
writer.WritePropertyName(JsonTypeReflector.ValuePropertyName, false);
JsonWriter.WriteValue(writer, contract.TypeCode, value);
writer.WriteEndObject();
return;
}
}
JsonWriter.WriteValue(writer, contract.TypeCode, value);
}
private bool CheckForCircularReference(JsonWriter writer, object value, JsonProperty property, JsonContract contract, JsonContainerContract containerContract, JsonProperty containerProperty)
{
if (value == null || contract.ContractType == JsonContractType.Primitive || contract.ContractType == JsonContractType.String)
return true;
ReferenceLoopHandling? referenceLoopHandling = null;
if (property != null)
referenceLoopHandling = property.ReferenceLoopHandling;
if (referenceLoopHandling == null && containerProperty != null)
referenceLoopHandling = containerProperty.ItemReferenceLoopHandling;
if (referenceLoopHandling == null && containerContract != null)
referenceLoopHandling = containerContract.ItemReferenceLoopHandling;
if (_serializeStack.IndexOf(value) != -1)
{
string message = "Self referencing loop detected";
if (property != null)
message += " for property '{0}'".FormatWith(CultureInfo.InvariantCulture, property.PropertyName);
message += " with type '{0}'.".FormatWith(CultureInfo.InvariantCulture, value.GetType());
switch (referenceLoopHandling.GetValueOrDefault(Serializer._referenceLoopHandling))
{
case ReferenceLoopHandling.Error:
throw JsonSerializationException.Create(null, writer.ContainerPath, message, null);
case ReferenceLoopHandling.Ignore:
//if (TraceWriter != null && TraceWriter.LevelFilter >= TraceLevel.Verbose)
// TraceWriter.Trace(TraceLevel.Verbose, JsonPosition.FormatMessage(null, writer.Path, message + ". Skipping serializing self referenced value."), null);
return false;
case ReferenceLoopHandling.Serialize:
//if (TraceWriter != null && TraceWriter.LevelFilter >= TraceLevel.Verbose)
// TraceWriter.Trace(TraceLevel.Verbose, JsonPosition.FormatMessage(null, writer.Path, message + ". Serializing self referenced value."), null);
return true;
}
}
return true;
}
private bool ShouldWriteReference(object value, JsonProperty property, JsonContract valueContract, JsonContainerContract collectionContract, JsonProperty containerProperty)
{
if (value == null)
return false;
if (valueContract.ContractType == JsonContractType.Primitive || valueContract.ContractType == JsonContractType.String)
return false;
bool? isReference = ResolveIsReference(valueContract, property, collectionContract, containerProperty);
if (isReference == null)
{
if (valueContract.ContractType == JsonContractType.Array)
isReference = HasFlag(Serializer._preserveReferencesHandling, PreserveReferencesHandling.Arrays);
else
isReference = HasFlag(Serializer._preserveReferencesHandling, PreserveReferencesHandling.Objects);
}
if (!isReference.Value)
return false;
return Serializer.GetReferenceResolver().IsReferenced(this, value);
}
private bool? ResolveIsReference(JsonContract contract, JsonProperty property, JsonContainerContract collectionContract, JsonProperty containerProperty)
{
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 && containerProperty != null)
isReference = containerProperty.ItemIsReference;
if (isReference == null && collectionContract != null)
isReference = collectionContract.ItemIsReference;
if (isReference == null)
isReference = contract.IsReference;
return isReference;
}
private void WriteObjectStart(JsonWriter writer, object value, JsonContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)
{
writer.WriteStartObject();
bool isReference = ResolveIsReference(contract, member, collectionContract, containerProperty) ?? HasFlag(Serializer._preserveReferencesHandling, PreserveReferencesHandling.Objects);
// don't make readonly fields the referenced value because they can't be deserialized to
if (isReference && (member == null || member.Writable))
{
WriteReferenceIdProperty(writer, contract.UnderlyingType, value);
}
if (ShouldWriteType(TypeNameHandling.Objects, contract, member, collectionContract, containerProperty))
{
WriteTypeProperty(writer, contract.UnderlyingType);
}
}
private void SerializeConvertable(JsonWriter writer, JsonConverter converter, object value, JsonContract contract, JsonContainerContract collectionContract, JsonProperty containerProperty)
{
if (ShouldWriteReference(value, null, contract, collectionContract, containerProperty))
{
WriteReference(writer, value);
}
else
{
if (!CheckForCircularReference(writer, value, null, contract, collectionContract, containerProperty))
return;
_serializeStack.Add(value);
//if (TraceWriter != null && TraceWriter.LevelFilter >= TraceLevel.Info)
// TraceWriter.Trace(TraceLevel.Info, JsonPosition.FormatMessage(null, writer.Path, "Started serializing {0} with converter {1}.".FormatWith(CultureInfo.InvariantCulture, value.GetType(), converter.GetType())), null);
converter.WriteJson(writer, value, GetInternalSerializer());
//if (TraceWriter != null && TraceWriter.LevelFilter >= TraceLevel.Info)
// TraceWriter.Trace(TraceLevel.Info, JsonPosition.FormatMessage(null, writer.Path, "Finished serializing {0} with converter {1}.".FormatWith(CultureInfo.InvariantCulture, value.GetType(), converter.GetType())), null);
_serializeStack.RemoveAt(_serializeStack.Count - 1);
}
}
private void SerializeDynamic(JsonWriter writer, IDynamicMetaObjectProvider value, JsonDynamicContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)
{
OnSerializing(writer, contract, value);
_serializeStack.Add(value);
WriteObjectStart(writer, value, contract, member, collectionContract, containerProperty);
int initialDepth = writer.Top;
for (int index = 0; index < contract.Properties.Count; index++)
{
JsonProperty property = contract.Properties[index];
// only write non-dynamic properties that have an explicit attribute
if (property.HasMemberAttribute)
{
try
{
object memberValue;
JsonContract memberContract;
if (!CalculatePropertyValues(writer, value, contract, member, property, out memberContract, out memberValue))
continue;
property.WritePropertyName(writer);
SerializeValue(writer, memberValue, memberContract, property, contract, member);
}
catch (Exception ex)
{
if (IsErrorHandled(value, contract, property.PropertyName, null, writer.ContainerPath, ex))
HandleError(writer, initialDepth);
else
throw;
}
}
}
foreach (string memberName in value.GetDynamicMemberNames())
{
object memberValue;
if (contract.TryGetMember(value, memberName, out memberValue))
{
try
{
JsonContract valueContract = GetContractSafe(memberValue);
if (!ShouldWriteDynamicProperty(memberValue))
continue;
if (CheckForCircularReference(writer, memberValue, null, valueContract, contract, member))
{
string resolvedPropertyName = (contract.PropertyNameResolver != null)
? contract.PropertyNameResolver(memberName)
: memberName;
writer.WritePropertyName(resolvedPropertyName);
SerializeValue(writer, memberValue, valueContract, null, contract, member);
}
}
catch (Exception ex)
{
if (IsErrorHandled(value, contract, memberName, null, writer.ContainerPath, ex))
HandleError(writer, initialDepth);
else
throw;
}
}
}
writer.WriteEndObject();
_serializeStack.RemoveAt(_serializeStack.Count - 1);
OnSerialized(writer, contract, value);
}
private JsonConverter GetConverter(JsonContract contract, JsonConverter memberConverter, JsonContainerContract containerContract, JsonProperty containerProperty)
{
JsonConverter converter = null;
if (memberConverter != null)
{
// member attribute converter
converter = memberConverter;
}
else if (containerProperty != null && containerProperty.ItemConverter != null)
{
converter = containerProperty.ItemConverter;
}
else if (containerContract != null && containerContract.ItemConverter != null)
{
converter = containerContract.ItemConverter;
}
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;
}
