public void Serialize(JsonWriter jsonWriter, object value, Type objectType)
{
if (jsonWriter == null)
throw new ArgumentNullException("jsonWriter");
_rootContract = (objectType != null) ? Serializer._contractResolver.ResolveContract(objectType) : null;
_rootLevel = _serializeStack.Count + 1;
JsonContract contract = GetContractSafe(value, objectType);
try
{
SerializeValue(jsonWriter, value, contract, null, null, null);
}
catch (Exception ex)
{
if (IsErrorHandled(null, contract, null, null, jsonWriter.Path, ex))
{
HandleError(jsonWriter, 0);
}
else
{
// clear context in case serializer is being used inside a converter
// if the converter wraps the error then not clearing the context will cause this error:
// "Current error context error is different to requested error."
ClearErrorContext();
throw;
}
}
finally
{
// clear root contract to ensure that if level was > 1 then it won't
// accidently be used for non root values
_rootContract = null;
}
}
private JsonArrayContract EnsureArrayContract(JsonReader reader, Type objectType, JsonContract contract)
{
if (contract == null)
throw JsonSerializationException.Create(reader, "Could not resolve type '{0}' to a JsonContract.".FormatWith(CultureInfo.InvariantCulture, objectType));
JsonArrayContract arrayContract = contract as JsonArrayContract;
if (arrayContract == null)
{
string message = @"Cannot deserialize the current JSON array (e.g. [1,2,3]) 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 to an array or a type that implements a collection interface (e.g. ICollection, IList) like List<T> that can be deserialized from a JSON array. JsonArrayAttribute can also be added to the type to force it to deserialize from a JSON array." + Environment.NewLine;
message = message.FormatWith(CultureInfo.InvariantCulture, objectType, GetExpectedDescription(contract));
throw JsonSerializationException.Create(reader, message);
}
return arrayContract;
}
private bool HasNoDefinedType(JsonContract contract)
{
return (contract == null || contract.UnderlyingType == typeof(object) || contract.ContractType == JsonContractType.Linq
#if !(NET35 || NET20 || PORTABLE40)
|| contract.UnderlyingType == typeof(IDynamicMetaObjectProvider)
#endif
);
}
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 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 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, property.PropertyType);
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 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? 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 ThrowUnexpectedEndException(JsonReader reader, JsonContract contract, object currentObject, string message)
{
try
{
throw JsonSerializationException.Create(reader, message);
}
catch (Exception ex)
{
if (IsErrorHandled(currentObject, contract, null, reader as IJsonLineInfo, reader.Path, ex))
HandleError(reader, false, 0);
else
throw;
}
}
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 (TraceWriter != null && TraceWriter.LevelFilter >= TraceLevel.Verbose)
TraceWriter.Trace(TraceLevel.Verbose, JsonPosition.FormatMessage(reader as IJsonLineInfo, reader.Path, "Resolved type '{0}' to {1}.".FormatWith(CultureInfo.InvariantCulture, qualifiedTypeName, specifiedType)), null);
if (objectType != null
#if !(NET35 || NET20 || PORTABLE40)
&& objectType != typeof(IDynamicMetaObjectProvider)
#endif
&& !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 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 bool ReadForType(JsonReader reader, JsonContract contract, bool hasConverter)
{
// don't read properties with converters as a specific value
// the value might be a string which will then get converted which will error if read as date for example
if (hasConverter)
return reader.Read();
ReadType t = (contract != null) ? contract.InternalReadType : ReadType.Read;
switch (t)
{
case ReadType.Read:
do
{
if (!reader.Read())
return false;
} while (reader.TokenType == JsonToken.Comment);
return true;
case ReadType.ReadAsInt32:
reader.ReadAsInt32();
break;
case ReadType.ReadAsDecimal:
reader.ReadAsDecimal();
break;
case ReadType.ReadAsBytes:
reader.ReadAsBytes();
break;
case ReadType.ReadAsString:
reader.ReadAsString();
break;
case ReadType.ReadAsDateTime:
reader.ReadAsDateTime();
break;
#if !NET20
case ReadType.ReadAsDateTimeOffset:
reader.ReadAsDateTimeOffset();
break;
#endif
default:
throw new ArgumentOutOfRangeException();
}
return (reader.TokenType != JsonToken.None);
}
private void OnDeserializing(JsonReader reader, JsonContract contract, object value)
{
if (TraceWriter != null && TraceWriter.LevelFilter >= TraceLevel.Info)
TraceWriter.Trace(TraceLevel.Info, JsonPosition.FormatMessage(reader as IJsonLineInfo, reader.Path, "Started deserializing {0}".FormatWith(CultureInfo.InvariantCulture, contract.UnderlyingType)), null);
contract.InvokeOnDeserializing(value, Serializer._context);
}
private object EnsureType(JsonReader reader, object value, CultureInfo culture, JsonContract contract, Type targetType)
{
if (targetType == null)
return value;
Type valueType = ReflectionUtils.GetObjectType(value);
// type of value and type of target don't match
// attempt to convert value's type to target's type
if (valueType != targetType)
{
if (value == null && contract.IsNullable)
return null;
try
{
if (contract.IsConvertable)
{
JsonPrimitiveContract primitiveContract = (JsonPrimitiveContract)contract;
if (contract.IsEnum)
{
if (value is string)
return Enum.Parse(contract.NonNullableUnderlyingType, value.ToString(), true);
if (ConvertUtils.IsInteger(primitiveContract.TypeCode))
return Enum.ToObject(contract.NonNullableUnderlyingType, value);
}
#if !(PORTABLE || PORTABLE40 || NET35 || NET20)
if (value is BigInteger)
return ConvertUtils.FromBigInteger((BigInteger)value, targetType);
#endif
// this won't work when converting to a custom IConvertible
return Convert.ChangeType(value, contract.NonNullableUnderlyingType, culture);
}
return ConvertUtils.ConvertOrCast(value, culture, contract.NonNullableUnderlyingType);
}
catch (Exception ex)
{
throw JsonSerializationException.Create(reader, "Error converting value {0} to type '{1}'.".FormatWith(CultureInfo.InvariantCulture, MiscellaneousUtils.FormatValueForPrint(value), targetType), ex);
}
}
return value;
}
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;
#if !(NET35 || NET20 || PORTABLE40)
case JsonContractType.Dynamic:
SerializeDynamic(writer, (IDynamicMetaObjectProvider)value, (JsonDynamicContract)valueContract, member, containerContract, containerProperty);
break;
#endif
#if !(NETFX_CORE || PORTABLE40 || PORTABLE)
case JsonContractType.Serializable:
SerializeISerializable(writer, (ISerializable)value, (JsonISerializableContract)valueContract, member, containerContract, containerProperty);
break;
#endif
case JsonContractType.Linq:
((JToken)value).WriteTo(writer, Serializer.Converters.ToArray());
break;
}
}
internal string GetExpectedDescription(JsonContract contract)
{
switch (contract.ContractType)
{
case JsonContractType.Object:
case JsonContractType.Dictionary:
#if !(NETFX_CORE || PORTABLE || PORTABLE40)
case JsonContractType.Serializable:
#endif
#if !(NET35 || NET20 || PORTABLE40)
case JsonContractType.Dynamic:
#endif
return @"JSON object (e.g. {""name"":""value""})";
case JsonContractType.Array:
return @"JSON array (e.g. [1,2,3])";
case JsonContractType.Primitive:
return @"JSON primitive value (e.g. string, number, boolean, null)";
case JsonContractType.String:
return @"JSON string value";
default:
throw new ArgumentOutOfRangeException();
}
}
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 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 void OnSerialized(JsonWriter writer, JsonContract contract, object value)
{
if (TraceWriter != null && TraceWriter.LevelFilter >= TraceLevel.Info)
TraceWriter.Trace(TraceLevel.Info, JsonPosition.FormatMessage(null, writer.Path, "Finished serializing {0}".FormatWith(CultureInfo.InvariantCulture, contract.UnderlyingType)), null);
contract.InvokeOnSerialized(value, Serializer._context);
}
private JToken CreateJToken(JsonReader reader, JsonContract contract)
{
ValidationUtils.ArgumentNotNull(reader, "reader");
if (contract != null)
{
if (contract.UnderlyingType == typeof(JRaw))
return JRaw.Create(reader);
if (reader.TokenType == JsonToken.Null
&& !(contract.UnderlyingType == typeof(JValue) || contract.UnderlyingType == typeof(JToken)))
return null;
}
JToken token;
using (JTokenWriter writer = new JTokenWriter())
{
writer.WriteToken(reader);
token = writer.Token;
}
return token;
}
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);
if (isReference)
{
WriteReferenceIdProperty(writer, contract.UnderlyingType, value);
}
if (ShouldWriteType(TypeNameHandling.Objects, contract, member, collectionContract, containerProperty))
{
WriteTypeProperty(writer, contract.UnderlyingType);
}
}
private object CreateList(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, object existingValue, string id)
{
object value;
if (HasNoDefinedType(contract))
return CreateJToken(reader, contract);
JsonArrayContract arrayContract = EnsureArrayContract(reader, objectType, contract);
if (existingValue == null)
{
bool createdFromNonDefaultCreator;
IList list = CreateNewList(reader, arrayContract, out createdFromNonDefaultCreator);
if (createdFromNonDefaultCreator)
{
if (id != null)
throw JsonSerializationException.Create(reader, "Cannot preserve reference to array or readonly list, or list 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 an array or readonly list, or list 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 an array or readonly list, or list created from a non-default constructor: {0}.".FormatWith(CultureInfo.InvariantCulture, contract.UnderlyingType));
if (!arrayContract.HasParametrizedCreator && !arrayContract.IsArray)
throw JsonSerializationException.Create(reader, "Cannot deserialize readonly or fixed size list: {0}.".FormatWith(CultureInfo.InvariantCulture, contract.UnderlyingType));
}
if (!arrayContract.IsMultidimensionalArray)
PopulateList(list, reader, arrayContract, member, id);
else
PopulateMultidimensionalArray(list, reader, arrayContract, member, id);
if (createdFromNonDefaultCreator)
{
if (arrayContract.IsMultidimensionalArray)
{
list = CollectionUtils.ToMultidimensionalArray(list, arrayContract.CollectionItemType, contract.CreatedType.GetArrayRank());
}
else if (arrayContract.IsArray)
{
Array a = Array.CreateInstance(arrayContract.CollectionItemType, list.Count);
list.CopyTo(a, 0);
list = a;
}
else
{
// call constructor that takes IEnumerable<T>
return arrayContract.ParametrizedCreator(list);
}
}
else if (list is IWrappedCollection)
{
return ((IWrappedCollection)list).UnderlyingCollection;
}
value = list;
}
else
{
if (!arrayContract.CanDeserialize)
throw JsonSerializationException.Create(reader, "Cannot populate list type {0}.".FormatWith(CultureInfo.InvariantCulture, contract.CreatedType));
value = PopulateList((arrayContract.ShouldCreateWrapper) ? arrayContract.CreateWrapper(existingValue) : (IList)existingValue, reader, arrayContract, member, id);
}
return value;
}
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;
}
#if !(NET35 || NET20 || PORTABLE40)
case JsonContractType.Dynamic:
JsonDynamicContract dynamicContract = (JsonDynamicContract)contract;
return CreateDynamic(reader, dynamicContract, member, id);
#endif
#if !(NETFX_CORE || PORTABLE40 || PORTABLE)
case JsonContractType.Serializable:
JsonISerializableContract serializableContract = (JsonISerializableContract)contract;
return CreateISerializable(reader, serializableContract, member, id);
#endif
}
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 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 != 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:
#if !(NETFX_CORE || PORTABLE40 || PORTABLE)
if (objectType == typeof(DBNull))
return DBNull.Value;
#endif
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 string GetPropertyName(JsonWriter writer, object name, JsonContract contract, out bool escape)
{
string propertyName;
if (contract.ContractType == JsonContractType.Primitive)
{
JsonPrimitiveContract primitiveContract = (JsonPrimitiveContract)contract;
if (primitiveContract.TypeCode == PrimitiveTypeCode.DateTime || primitiveContract.TypeCode == PrimitiveTypeCode.DateTimeNullable)
{
escape = false;
StringWriter sw = new StringWriter(CultureInfo.InvariantCulture);
DateTimeUtils.WriteDateTimeString(sw, (DateTime)name, writer.DateFormatHandling, writer.DateFormatString, writer.Culture);
return sw.ToString();
}
#if !NET20
else if (primitiveContract.TypeCode == PrimitiveTypeCode.DateTimeOffset || primitiveContract.TypeCode == PrimitiveTypeCode.DateTimeOffsetNullable)
{
escape = false;
StringWriter sw = new StringWriter(CultureInfo.InvariantCulture);
DateTimeUtils.WriteDateTimeOffsetString(sw, (DateTimeOffset)name, writer.DateFormatHandling, writer.DateFormatString, writer.Culture);
return sw.ToString();
}
#endif
else
{
escape = true;
return Convert.ToString(name, CultureInfo.InvariantCulture);
}
}
else if (TryConvertToString(name, name.GetType(), out propertyName))
{
escape = true;
return propertyName;
}
else
{
escape = true;
return name.ToString();
}
}
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;
}