/// <summary>
/// Deserializes the specified json string.
/// </summary>
/// <param name="json">The json.</param>
/// <param name="currentReadIndex">Index of the current read.</param>
/// <param name="context">The context.</param>
/// <returns></returns>
public override object Deserialize(string json, ref int currentReadIndex, SerializationContext context)
{
// check if value is null
int expectedSepIndex = currentReadIndex + keyLength;
if (json[expectedSepIndex] == 'n' &&
json[expectedSepIndex + 1] == 'u' &&
json[expectedSepIndex + 2] == 'l' &&
json[expectedSepIndex + 3] == 'l')
{
currentReadIndex = expectedSepIndex + 4;
return(null);
}
if (json[expectedSepIndex + 1] == Structure.CharQuotationMark &&
json[expectedSepIndex + 2] == '#' &&
json[expectedSepIndex + 3] == 't' &&
json[expectedSepIndex + 4] == 'y' &&
json[expectedSepIndex + 5] == 'p' &&
json[expectedSepIndex + 6] == 'e'
)
{
return(DeserializeSpecialType(json, ref currentReadIndex, context, expectedSepIndex));
}
if (isObject)
{
Type objectTargetType = null;
if (unknownTypeResolver != null)
{
context.Key = this.key;
context.ValueStartIndex = currentReadIndex;
context.ArrayIndex = null;
context.JsonString = json;
if (type.IsInterface)
{
context.InterfaceType = this.type;
}
objectTargetType = unknownTypeResolver(context);
if (context.InterfaceType != null)
{
context.InterfaceType = null;
}
}
if (objectTargetType == null)
{
objectTargetType = Structure.GetDefaultType(json, expectedSepIndex);
if (objectTargetType == null)
{
throw new InvalidOperationException("Can't determine target type for JSON key: \"" + context.Key + "\"");
}
}
IJsonTypeStructure currentObjectStructure;
if (!typeSerializerCache.TryGetValue(objectTargetType, out currentObjectStructure))
{
currentObjectStructure = Structure.DetermineStructure(objectTargetType, this.key, context, this.isArrayItem);
typeSerializerCache[objectTargetType] = currentObjectStructure;
}
return(currentObjectStructure.Deserialize(json, ref currentReadIndex, context));
}
else
{
if (json[currentReadIndex] != Structure.CharLeftBrace &&
!isArrayItem)
{
if (json[currentReadIndex] == Structure.CharComma)
{
currentReadIndex += 1;
}
expectedSepIndex = currentReadIndex + keyLength - 1;
if (json[expectedSepIndex] == Structure.CharColon)
{
currentReadIndex = expectedSepIndex + 1;
}
else
{
throw new Exception("Unexpected JSON data!");
}
}
if (this.concreteTargetType == null)
{
// try get static target type
if (type.IsInterface || type.IsAbstract)
{
context.InterfaceType = type;
context.Key = key;
Type itemTypeResolved = unknownTypeResolver(context);
if (itemTypeResolved != null)
{
concreteTargetType = itemTypeResolved;
}
context.InterfaceType = null;
}
else
{
concreteTargetType = type;
}
}
// create target object
object target;
try
{
target = TypeService.CreateInstance(this.concreteTargetType);
}
catch (Exception ex)
{
throw new Exception("Can't create object instance for \"" + this.concreteTargetType + "\" - \"" + type + "\"!", ex);
}
object oldParentObj = context.ParentObject;
context.ParentObject = target;
// jump over opening brace
currentReadIndex += 1;
for (int propIndex = 0; propIndex < objectStructure.Length; propIndex++)
{
IJsonTypeStructure structure = objectStructure[propIndex];
var setPropertyAccessor = setAccessorByPropertyIndex[propIndex];
// check out of order json
int expectedKeyStartIndex = currentReadIndex + 1;
int actualKeyIndex = json.IndexOf(structure.Key, expectedKeyStartIndex);
if (actualKeyIndex != expectedKeyStartIndex ||
json[structure.Key.Length + actualKeyIndex] != Structure.CharQuotationMark) // Recognize key with the same begin string but different ending
{
// out of order key recognized
int keyEndIndex = json.IndexOf(Structure.CharQuotationMark, expectedKeyStartIndex);
int?keyStructureIndex = null;
StructureComplexOutOfOrder cachedOutOfOrderStruct = null;
string actualKey = null;
if (keyEndIndex != -1) // ignore if end of json is reached
{
actualKey = json.Substring(expectedKeyStartIndex, keyEndIndex - expectedKeyStartIndex);
// check if out of order structure is already cached
if (outOfOrderStructures != null)
{
for (int indexCachedOutOfOrder = 0; indexCachedOutOfOrder < outOfOrderStructures.Count; indexCachedOutOfOrder++)
{
var cachedItem = outOfOrderStructures[indexCachedOutOfOrder];
if (cachedItem.ObjectStructure[propIndex].Key == actualKey)
{
cachedOutOfOrderStruct = cachedItem;
break;
}
}
}
if (cachedOutOfOrderStruct == null)
{
// find out of order key
keyStructureIndex = FindOutOfOrderKey(objectStructure, actualKey);
}
}
if (cachedOutOfOrderStruct != null)
{
structure = cachedOutOfOrderStruct.ObjectStructure[propIndex];
setPropertyAccessor = cachedOutOfOrderStruct.SetAccessorByPropertyIndex[propIndex];
}
else if (keyStructureIndex.HasValue)
{
lock (syncObj)
{
// create or move out of order structure
if (outOfOrderStructures == null)
{
outOfOrderStructures = new List <StructureComplexOutOfOrder>();
}
// try reuse existing out of order array
StructureComplexOutOfOrder currentOutOfOrderStruct;
var existing = outOfOrderStructures.Where(ooo => ooo.MaxTargetIndex < propIndex).FirstOrDefault();
IJsonTypeStructure[] sourceStructure = objectStructure;
Func <object, object>[] sourceGetAccessorByPropertyIndex = getAccessorByPropertyIndex;
Action <object, object>[] sourceSetAccessorByPropertyIndex = setAccessorByPropertyIndex;
// create new cloned out of order strucutre
if (existing == null)
{
currentOutOfOrderStruct = new StructureComplexOutOfOrder()
{
ObjectStructure = (IJsonTypeStructure[])sourceStructure.Clone(),
GetAccessorByPropertyIndex = (Func <object, object>[])sourceGetAccessorByPropertyIndex.Clone(),
SetAccessorByPropertyIndex = (Action <object, object>[])sourceSetAccessorByPropertyIndex.Clone()
};
}
else
{
currentOutOfOrderStruct = existing;
sourceStructure = existing.ObjectStructure;
structure = sourceStructure[propIndex];
sourceGetAccessorByPropertyIndex = existing.GetAccessorByPropertyIndex;
sourceSetAccessorByPropertyIndex = existing.SetAccessorByPropertyIndex;
// search in chached object structure again
keyStructureIndex = FindOutOfOrderKey(sourceStructure, actualKey);
}
// switch object structure to received json order
IJsonTypeStructure foundOutOfOrderStructure = sourceStructure[keyStructureIndex.Value];
currentOutOfOrderStruct.ObjectStructure[propIndex] = foundOutOfOrderStructure;
currentOutOfOrderStruct.ObjectStructure[keyStructureIndex.Value] = structure;
structure = foundOutOfOrderStructure;
currentOutOfOrderStruct.MaxTargetIndex = propIndex;
// switch value setter
var currentAccessor = sourceGetAccessorByPropertyIndex[propIndex];
var foundOutOfOrderAccessor = sourceGetAccessorByPropertyIndex[keyStructureIndex.Value];
currentOutOfOrderStruct.GetAccessorByPropertyIndex[propIndex] = foundOutOfOrderAccessor;
currentOutOfOrderStruct.GetAccessorByPropertyIndex[keyStructureIndex.Value] = currentAccessor;
var currentAccessorSet = sourceSetAccessorByPropertyIndex[propIndex];
var foundOutOfOrderAccessorSet = sourceSetAccessorByPropertyIndex[keyStructureIndex.Value];
currentOutOfOrderStruct.SetAccessorByPropertyIndex[propIndex] = foundOutOfOrderAccessorSet;
currentOutOfOrderStruct.SetAccessorByPropertyIndex[keyStructureIndex.Value] = currentAccessorSet;
setPropertyAccessor = foundOutOfOrderAccessorSet;
if (existing == null)
{
outOfOrderStructures.Add(currentOutOfOrderStruct);
}
}
}
else
{
if (context.Serializer.IsMissingFieldDataAllowed)
{
if (SkipJsonElement(json, ref currentReadIndex))
{
propIndex--; // re-read current structure
}
continue; // ignore missing field
}
else
{
throw new KeyNotFoundException(string.Format("The key: \"{0}\" is not present in the object structure! JSON: \"{1}\"; Target Type: \"{2}\"", actualKey, json, this.type.AssemblyQualifiedName));
}
}
}
object value = structure.Deserialize(json, ref currentReadIndex, context);
if (value != null)
{
setPropertyAccessor(target, value);
}
if (json[currentReadIndex] == Structure.CharRightBrace)
{
// end reached
currentReadIndex++;
break;
}
currentReadIndex++;
}
if (json[currentReadIndex - 1] != Structure.CharRightBrace)
{
if (context.Serializer.IsMissingFieldDataAllowed)
{
// json object contains more data than expected from the type structure
// skip futher object data
SkipJsonObject(json, ref currentReadIndex);
}
else
{
throw new InvalidOperationException(string.Format("The json object contains more data than expected in target type! JSON: \"{0}\"; Key: \"{1}\"; Target Type: \"{2}\"", json, this.key, this.type.AssemblyQualifiedName));
}
}
context.ParentObject = oldParentObj;
return(target);
}
}
private object DeserializeArrayItem(string json, ref int currentReadIndex, int arrayItemIndex, SerializationContext context)
{
if (json[currentReadIndex] == 'n' &&
json[currentReadIndex + 1] == 'u' &&
json[currentReadIndex + 2] == 'l' &&
json[currentReadIndex + 3] == 'l')
{
currentReadIndex = currentReadIndex + 4;
return(null);
}
//Type objectTargetType = null;
if (json[currentReadIndex + 2] == '#' &&
json[currentReadIndex + 3] == 't' &&
json[currentReadIndex + 4] == 'y' &&
json[currentReadIndex + 5] == 'p' &&
json[currentReadIndex + 6] == 'e'
)
{
return(DeserializeSpecialType(json, ref currentReadIndex, context, currentReadIndex));
}
object itemValue;
if (this.isObject)
{
// determine target type during deserialization
Type type = null;
if (unknownTypeResolver != null)
{
context.Key = this.key;
context.ValueStartIndex = currentReadIndex;
context.ArrayIndex = arrayItemIndex;
context.JsonString = json;
type = unknownTypeResolver(context);
context.ArrayIndex = null;
}
if (type == null || type.Equals(typeof(object)))
{
type = Structure.GetDefaultType(json, currentReadIndex);
if (type == null)
{
int readCount = Math.Min(json.Length - currentReadIndex, 25);
string jsonPart = json.Substring(currentReadIndex, readCount);
throw new InvalidOperationException(string.Format("Unable to get the target type for array object index {0}; Key: {1}; JSON part: \"{2}\"", arrayItemIndex, this.key, jsonPart));
}
}
IJsonTypeStructure currentObjectStructure;
if (!typeSerializerCache.TryGetValue(type, out currentObjectStructure))
{
currentObjectStructure = Structure.DetermineStructure(type, GetNestedArrayKey(this.key, arrayItemIndex), context, true);
typeSerializerCache[type] = currentObjectStructure;
}
itemValue = currentObjectStructure.Deserialize(json, ref currentReadIndex, context);
}
else
{
if (itemDeSerializer == null)
{
itemDeSerializer = Structure.DetermineStructure(itemType, key, context, true);
}
// fixed array target type
itemValue = itemDeSerializer.Deserialize(json, ref currentReadIndex, context);
}
return(itemValue);
}