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 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, CultureInfo.InvariantCulture, 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, CultureInfo.InvariantCulture, 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, CultureInfo.InvariantCulture, 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 && reader.TokenType != JsonToken.Null)
throw new JsonSerializationException("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 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(this, reference);
}
else
{
specialProperty = true;
}
}
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 != null) ? reader.Value.ToString() : null;
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);
}
JsonPrimitiveContract primitiveContract = contract as JsonPrimitiveContract;
if (primitiveContract != null)
{
// if the content is inside $value then read past it
if (reader.TokenType == JsonToken.PropertyName && string.Equals(reader.Value.ToString(), JsonTypeReflector.ValuePropertyName, StringComparison.Ordinal))
{
CheckedRead(reader);
object value = CreateValueInternal(reader, objectType, primitiveContract, member, existingValue);
CheckedRead(reader);
return value;
}
}
#if !SILVERLIGHT && !PocketPC
JsonISerializableContract serializableContract = contract as JsonISerializableContract;
if (serializableContract != null)
{
return CreateISerializable(reader, serializableContract, id);
}
#endif
#if !(NET35 || NET20 || WINDOWS_PHONE)
JsonDynamicContract dynamicContract = contract as JsonDynamicContract;
if (dynamicContract != null)
{
return CreateDynamic(reader, dynamicContract, id);
}
#endif
throw new JsonSerializationException("Cannot deserialize JSON object into type '{0}'.".FormatWith(CultureInfo.InvariantCulture, objectType));
}
private void SetPropertyPresence(JsonReader reader, JsonProperty property, Dictionary<JsonProperty, PropertyPresence> requiredProperties)
{
if (property != null)
{
requiredProperties[property] = (reader.TokenType == JsonToken.Null || reader.TokenType == JsonToken.Undefined)
? PropertyPresence.Null
: PropertyPresence.Value;
}
}
private object CreateValueProperty(JsonReader reader, JsonProperty property, object target, bool gottenCurrentValue, object currentValue)
{
JsonContract contract = GetContractSafe(property.PropertyType, currentValue);
Type objectType = property.PropertyType;
JsonConverter converter = GetConverter(contract, property.MemberConverter);
if (converter != null && converter.CanRead)
{
if (!gottenCurrentValue && target != null && property.Readable)
currentValue = property.ValueProvider.GetValue(target);
return converter.ReadJson(reader, objectType, currentValue, GetInternalSerializer());
}
return CreateValueInternal(reader, objectType, contract, property, currentValue);
}
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(this, value);
}
private void SerializePrimitive(JsonWriter writer, object value, JsonPrimitiveContract contract, JsonProperty member, JsonContract collectionValueContract)
{
if (contract.UnderlyingType == typeof (byte[]))
{
bool includeTypeDetails = ShouldWriteType(TypeNameHandling.Objects, contract, member, collectionValueContract);
if (includeTypeDetails)
{
writer.WriteStartObject();
WriteTypeProperty(writer, contract.CreatedType);
writer.WritePropertyName(JsonTypeReflector.ValuePropertyName);
writer.WriteValue(value);
writer.WriteEndObject();
return;
}
}
writer.WriteValue(value);
}
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(this, 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);
propertyName = (contract.PropertyNameResolver != null)
? contract.PropertyNameResolver(propertyName)
: propertyName;
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 bool ShouldSerialize(JsonProperty property, object target)
{
if (property.ShouldSerialize == null)
return true;
return property.ShouldSerialize(target);
}
private void SerializeISerializable(JsonWriter writer, ISerializable value, JsonISerializableContract contract, JsonProperty member, JsonContract collectionValueContract)
{
contract.InvokeOnSerializing(value, Serializer.Context);
SerializeStack.Add(value);
writer.WriteStartObject();
if (ShouldWriteType(TypeNameHandling.Objects, contract, member, collectionValueContract))
{
WriteTypeProperty(writer, contract.UnderlyingType);
}
SerializationInfo serializationInfo = new SerializationInfo(contract.UnderlyingType, new FormatterConverter());
value.GetObjectData(serializationInfo, Serializer.Context);
foreach (SerializationEntry serializationEntry in serializationInfo)
{
writer.WritePropertyName(serializationEntry.Name);
SerializeValue(writer, serializationEntry.Value, GetContractSafe(serializationEntry.Value), null, null);
}
writer.WriteEndObject();
SerializeStack.RemoveAt(SerializeStack.Count - 1);
contract.InvokeOnSerialized(value, Serializer.Context);
}
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
// instance and property type are different
&& contract.UnderlyingType != member.PropertyType)
{
JsonContract memberTypeContract = Serializer.ContractResolver.ResolveContract(member.PropertyType);
// 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 (contract.UnderlyingType != memberTypeContract.CreatedType)
return true;
}
}
else if (collectionValueContract != null)
{
if (Serializer.TypeNameHandling == TypeNameHandling.Auto && contract.UnderlyingType != collectionValueContract.UnderlyingType)
return true;
}
return false;
}
private void SerializeList(JsonWriter writer, IWrappedCollection values, JsonArrayContract contract, JsonProperty member, JsonContract collectionValueContract)
{
contract.InvokeOnSerializing(values.UnderlyingCollection, Serializer.Context);
SerializeStack.Add(values.UnderlyingCollection);
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(this, values.UnderlyingCollection));
}
if (includeTypeDetails)
{
WriteTypeProperty(writer, values.UnderlyingCollection.GetType());
}
writer.WritePropertyName(JsonTypeReflector.ArrayValuesPropertyName);
}
JsonContract childValuesContract = Serializer.ContractResolver.ResolveContract(contract.CollectionItemType ?? typeof(object));
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 = GetContractSafe(value);
if (ShouldWriteReference(value, null, valueContract))
{
WriteReference(writer, value);
}
else
{
if (CheckForCircularReference(value, null, contract))
{
SerializeValue(writer, value, valueContract, null, childValuesContract);
}
}
}
catch (Exception ex)
{
if (IsErrorHandled(values.UnderlyingCollection, contract, index, ex))
HandleError(writer, initialDepth);
else
throw;
}
finally
{
index++;
}
}
writer.WriteEndArray();
if (isReference || includeTypeDetails)
{
writer.WriteEndObject();
}
SerializeStack.RemoveAt(SerializeStack.Count - 1);
contract.InvokeOnSerialized(values.UnderlyingCollection, Serializer.Context);
}
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(this, 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) && IsSpecified(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 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 (HasFlag(property.DefaultValueHandling.GetValueOrDefault(Serializer.DefaultValueHandling), DefaultValueHandling.Ignore)
&& MiscellaneousUtils.ValueEquals(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 void SetPropertyValue(JsonProperty property, JsonReader reader, object target)
{
if (property.Ignored)
{
reader.Skip();
return;
}
object currentValue = null;
bool useExistingValue = false;
bool gottenCurrentValue = false;
ObjectCreationHandling objectCreationHandling =
property.ObjectCreationHandling.GetValueOrDefault(Serializer.ObjectCreationHandling);
if ((objectCreationHandling == ObjectCreationHandling.Auto || objectCreationHandling == ObjectCreationHandling.Reuse)
&& (reader.TokenType == JsonToken.StartArray || reader.TokenType == JsonToken.StartObject)
&& property.Readable)
{
currentValue = property.ValueProvider.GetValue(target);
gottenCurrentValue = true;
useExistingValue = (currentValue != null
&& !property.PropertyType.IsArray
&& !ReflectionUtils.InheritsGenericDefinition(property.PropertyType, typeof (ReadOnlyCollection<>))
&& !property.PropertyType.IsValueType);
}
if (!property.Writable && !useExistingValue)
{
reader.Skip();
return;
}
// test tokentype here because null might not be convertable to some types, e.g. ignoring null when applied to DateTime
if (property.NullValueHandling.GetValueOrDefault(Serializer.NullValueHandling) == NullValueHandling.Ignore && reader.TokenType == JsonToken.Null)
{
reader.Skip();
return;
}
// test tokentype here because default value might not be convertable to actual type, e.g. default of "" for DateTime
if (HasFlag(property.DefaultValueHandling.GetValueOrDefault(Serializer.DefaultValueHandling), DefaultValueHandling.Ignore)
&& JsonReader.IsPrimitiveToken(reader.TokenType)
&& MiscellaneousUtils.ValueEquals(reader.Value, property.DefaultValue))
{
reader.Skip();
return;
}
object existingValue = (useExistingValue) ? currentValue : null;
object value = CreateValueProperty(reader, property, target, gottenCurrentValue, existingValue);
// always set the value if useExistingValue is false,
// otherwise also set it if CreateValue returns a new value compared to the currentValue
// this could happen because of a JsonConverter against the type
if ((!useExistingValue || value != currentValue)
&& ShouldSetPropertyValue(property, value))
{
property.ValueProvider.SetValue(target, value);
if (property.SetIsSpecified != null)
property.SetIsSpecified(target, true);
}
}
private bool IsSpecified(JsonProperty property, object target)
{
if (property.GetIsSpecified == null)
return true;
return property.GetIsSpecified(target);
}
private bool ShouldSetPropertyValue(JsonProperty property, object value)
{
if (property.NullValueHandling.GetValueOrDefault(Serializer.NullValueHandling) == NullValueHandling.Ignore && value == null)
return false;
if (HasFlag(property.DefaultValueHandling.GetValueOrDefault(Serializer.DefaultValueHandling), DefaultValueHandling.Ignore)
&& MiscellaneousUtils.ValueEquals(value, property.DefaultValue))
return false;
if (!property.Writable)
return false;
return true;
}
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)
{
SerializePrimitive(writer, value, (JsonPrimitiveContract)valueContract, member, collectionValueContract);
}
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)
{
JsonArrayContract arrayContract = (JsonArrayContract)valueContract;
SerializeList(writer, arrayContract.CreateWrapper(value), arrayContract, member, collectionValueContract);
}
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, member, collectionValueContract);
}
#endif
#if !(NET35 || NET20 || WINDOWS_PHONE)
else if (valueContract is JsonDynamicContract)
{
SerializeDynamic(writer, (IDynamicMetaObjectProvider)value, (JsonDynamicContract)valueContract);
}
#endif
}