private static object ReadValue(Type instType, JsonReader reader)
{
reader.Read();
if (reader.Token == JsonToken.ArrayEnd)
{
return(null);
}
Type underlyingType = Nullable.GetUnderlyingType(instType);
Type valueType = underlyingType ?? instType;
if (reader.Token == JsonToken.Null)
{
#if JSON_WINRT || (UNITY_METRO && !UNITY_EDITOR)
/* IsClass is made a getter here as a comparability
* patch for WinRT build targets, see Platform.cs */
if (instType.IsClass() || underlyingType != null)
{
#else
if (instType.IsClass || underlyingType != null)
{
#endif
return(null);
}
throw new JsonException(string.Format("Can't assign null to an instance of type {0}", instType));
}
if (reader.Token == JsonToken.Real ||
reader.Token == JsonToken.Natural ||
reader.Token == JsonToken.String ||
reader.Token == JsonToken.Boolean)
{
Type jsonType = reader.Value.GetType();
if (valueType.IsAssignableFrom(jsonType))
{
return(reader.Value);
}
// Try to find a custom or base importer
ImporterFunc importer = GetImporter(jsonType, valueType);
if (importer != null)
{
return(importer(reader.Value));
}
// Maybe it's an enum
#if JSON_WINRT || (UNITY_METRO && !UNITY_EDITOR)
/* IsClass is made a getter here as a comparability
* patch for WinRT build targets, see Platform.cs */
if (valueType.IsEnum())
{
#else
if (valueType.IsEnum)
{
#endif
return(Enum.ToObject(valueType, reader.Value));
}
// Try using an implicit conversion operator
MethodInfo convOp = GetConvOp(valueType, jsonType);
if (convOp != null)
{
return(convOp.Invoke(null, new object[] { reader.Value }));
}
// No luck
throw new JsonException(string.Format("Can't assign value '{0}' (type {1}) to type {2}", reader.Value, jsonType, instType));
}
object instance = null;
if (reader.Token == JsonToken.ArrayStart)
{
// If there's a custom importer that fits, use it
ImporterFunc importer = GetImporter(typeof(JsonData), instType);
if (importer != null)
{
instType = typeof(JsonData);
}
AddArrayMetadata(instType);
ArrayMetadata tdata = arrayMetadata[instType];
if (!tdata.IsArray && !tdata.IsList)
{
throw new JsonException(string.Format("Type {0} can't act as an array", instType));
}
IList list;
Type elemType;
if (!tdata.IsArray)
{
list = (IList)CreateInstance(instType);
elemType = tdata.ElementType;
}
else
{
//list = new ArrayList();
list = new List <object>();
elemType = instType.GetElementType();
}
while (true)
{
object item = ReadValue(elemType, reader);
if (item == null && reader.Token == JsonToken.ArrayEnd)
{
break;
}
list.Add(item);
}
if (tdata.IsArray)
{
int n = list.Count;
instance = Array.CreateInstance(elemType, n);
for (int i = 0; i < n; i++)
{
((Array)instance).SetValue(list[i], i);
}
}
else
{
instance = list;
}
if (importer != null)
{
instance = importer(instance);
}
}
else if (reader.Token == JsonToken.ObjectStart)
{
bool done = false;
string property = null;
reader.Read();
if (reader.Token == JsonToken.ObjectEnd)
{
done = true;
}
else
{
property = (string)reader.Value;
if (reader.TypeHinting && property == reader.HintTypeName)
{
valueType = reader.ReadType();
reader.Read();
property = (string)reader.Value;
//reader.Read();
//string typeName = (string)reader.Value;
//reader.Read();
//if ((string)reader.Value == reader.HintValueName)
//{
// valueType = Type.GetType(typeName);
// object value = ReadValue(valueType, reader);
// reader.Read();
// if (reader.Token != JsonToken.ObjectEnd)
// {
// throw new JsonException(string.Format("Invalid type hinting object, has too many properties: {0}...", reader.Token));
// }
// return value;
//}
//else
//{
// throw new JsonException(string.Format("Expected \"{0}\" property for type hinting but instead got \"{1}\"", reader.HintValueName, reader.Value));
//}
}
}
// If there's a custom importer that fits, use to create a JsonData type instead.
// Once the object is deserialzied, it will be invoked to create the actual converted object.
ImporterFunc importer = GetImporter(typeof(JsonData), valueType);
if (importer != null)
{
valueType = typeof(JsonData);
}
ObjectMetadata tdata = AddObjectMetadata(valueType);
instance = CreateInstance(valueType);
bool firstRun = true;
while (!done)
{
if (firstRun)
{
firstRun = false;
}
else
{
reader.Read();
if (reader.Token == JsonToken.ObjectEnd)
{
break;
}
property = (string)reader.Value;
}
PropertyMetadata pdata;
if (tdata.Properties.TryGetValue(property, out pdata))
{
// Don't deserialize a field or property that has a JsonIgnore attribute with deserialization usage.
if (pdata.Ignore)
{
ReadSkip(reader);
continue;
}
if (pdata.IsField)
{
((FieldInfo)pdata.Info).SetValue(instance, ReadValue(pdata.Type, reader));
}
else
{
PropertyInfo pinfo = (PropertyInfo)pdata.Info;
if (pinfo.CanWrite)
{
pinfo.SetValue(instance, ReadValue(pdata.Type, reader), null);
}
else
{
ReadValue(pdata.Type, reader);
}
}
}
else
{
if (!tdata.IsDictionary)
{
if (!reader.SkipNonMembers)
{
throw new JsonException(string.Format("The type {0} doesn't have the property '{1}'", instType, property));
}
else
{
ReadSkip(reader);
continue;
}
}
((IDictionary)instance).Add(property, ReadValue(tdata.ElementType, reader));
}
}
if (importer != null)
{
instance = importer(instance);
}
}
return(instance);
}
private static void WriteValue(object obj, JsonWriter writer, bool privateWriter, int depth)
{
if (depth > maxNestingDepth)
{
throw new JsonException(string.Format("Max allowed object depth reached while trying to export from type {0}", obj.GetType()));
}
if (obj == null)
{
writer.Write(null);
return;
}
if (obj is IJsonWrapper)
{
if (privateWriter)
{
writer.TextWriter.Write(((IJsonWrapper)obj).ToJson());
}
else
{
((IJsonWrapper)obj).ToJson(writer);
}
return;
}
if (obj is string)
{
writer.Write((string)obj);
return;
}
if (obj is double)
{
writer.Write((double)obj);
return;
}
if (obj is long)
{
writer.Write((long)obj);
return;
}
if (obj is bool)
{
writer.Write((bool)obj);
return;
}
if (obj is Array)
{
writer.WriteArrayStart();
Array arr = (Array)obj;
Type elemType = arr.GetType().GetElementType();
foreach (object elem in arr)
{
// if the collection contains polymorphic elements, we need to include type information for deserialization
//if (writer.TypeHinting && elem != null & elem.GetType() != elemType) {
// writer.WriteObjectStart();
// writer.WritePropertyName(writer.HintTypeName);
// writer.Write(elem.GetType().FullName);
// writer.WritePropertyName(writer.HintValueName);
// WriteValue(elem, writer, privateWriter, depth + 1);
// writer.WriteObjectEnd();
//} else {
WriteValue(elem, writer, privateWriter, depth + 1);
//}
}
writer.WriteArrayEnd();
return;
}
if (obj is IList)
{
writer.WriteArrayStart();
IList list = (IList)obj;
// collection might be non-generic type like Arraylist
Type elemType = typeof(object);
if (list.GetType().GetGenericArguments().Length > 0)
{
// collection is a generic type like List<T>
elemType = list.GetType().GetGenericArguments()[0];
}
foreach (object elem in list)
{
// if the collection contains polymorphic elements, we need to include type information for deserialization
//if (writer.TypeHinting && elem != null && elem.GetType() != elemType) {
// writer.WriteObjectStart();
// writer.WritePropertyName(writer.HintTypeName);
// writer.Write(elem.GetType().AssemblyQualifiedName);
// writer.WritePropertyName(writer.HintValueName);
// WriteValue(elem, writer, privateWriter, depth + 1);
// writer.WriteObjectEnd();
//} else {
WriteValue(elem, writer, privateWriter, depth + 1);
//}
}
writer.WriteArrayEnd();
return;
}
if (obj is IDictionary)
{
writer.WriteObjectStart();
IDictionary dict = (IDictionary)obj;
// collection might be non-generic type like Hashtable
Type elemType = typeof(object);
if (dict.GetType().GetGenericArguments().Length > 1)
{
// collection is a generic type like Dictionary<T, V>
elemType = dict.GetType().GetGenericArguments()[1];
}
foreach (DictionaryEntry entry in dict)
{
writer.WritePropertyName((string)entry.Key);
// if the collection contains polymorphic elements, we need to include type information for deserialization
//if (writer.TypeHinting && entry.Value != null && entry.Value.GetType() != elemType) {
// writer.WriteObjectStart();
// writer.WritePropertyName(writer.HintTypeName);
// writer.Write(entry.Value.GetType().AssemblyQualifiedName);
// writer.WritePropertyName(writer.HintValueName);
// WriteValue(entry.Value, writer, privateWriter, depth + 1);
// writer.WriteObjectEnd();
//} else {
WriteValue(entry.Value, writer, privateWriter, depth + 1);
//}
}
writer.WriteObjectEnd();
return;
}
Type objType = obj.GetType();
// Try a base or custom importer if one exists
ExporterFunc exporter = GetExporter(objType);
if (exporter != null)
{
exporter(obj, writer);
return;
}
// Last option, let's see if it's an enum
if (obj is Enum)
{
Type enumType = Enum.GetUnderlyingType(objType);
if (enumType == typeof(long))
{
writer.Write((long)obj);
}
else
{
ExporterFunc enumConverter = GetExporter(enumType);
if (enumConverter != null)
{
enumConverter(obj, writer);
}
}
return;
}
// Okay, it looks like the input should be exported as an object
ObjectMetadata tdata = AddObjectMetadata(objType);
writer.WriteObjectStart();
//在Json的第一个字段前插入类型标识
if (writer.TypeHinting)
{
writer.WriteType(objType);
}
foreach (string property in tdata.Properties.Keys)
{
PropertyMetadata pdata = tdata.Properties[property];
// Don't serialize soft aliases (which get added to ObjectMetadata.Properties twice).
if (pdata.Alias != null && property != pdata.Info.Name && tdata.Properties.ContainsKey(pdata.Info.Name))
{
continue;
}
// Don't serialize a field or property with the JsonIgnore attribute with serialization usage
if (pdata.Ignore)
{
continue;
}
if (pdata.IsField)
{
FieldInfo info = (FieldInfo)pdata.Info;
if (pdata.Alias != null)
{
writer.WritePropertyName(pdata.Alias);
}
else
{
writer.WritePropertyName(info.Name);
}
object value = info.GetValue(obj);
//if (writer.TypeHinting && value != null && info.FieldType != value.GetType()) {
// // the object stored in the field might be a different type that what was declared, need type hinting
// writer.WriteObjectStart();
// writer.WritePropertyName(writer.HintTypeName);
// writer.Write(value.GetType().AssemblyQualifiedName);
// writer.WritePropertyName(writer.HintValueName);
// WriteValue(value, writer, privateWriter, depth + 1);
// writer.WriteObjectEnd();
//} else {
WriteValue(value, writer, privateWriter, depth + 1);
//}
}
//暂时去除类属性的序列化操作,因为静态数据里面带有不需要序列化的属性
//else {
// PropertyInfo info = (PropertyInfo)pdata.Info;
// if (info.CanRead) {
// if (pdata.Alias != null) {
// writer.WritePropertyName(pdata.Alias);
// } else {
// writer.WritePropertyName(info.Name);
// }
// object value = info.GetValue(obj, null);
// //if (writer.TypeHinting && value != null && info.PropertyType != value.GetType()) {
// // // the object stored in the property might be a different type that what was declared, need type hinting
// // writer.WriteObjectStart();
// // writer.WritePropertyName(writer.HintTypeName);
// // writer.Write(value.GetType().AssemblyQualifiedName);
// // writer.WritePropertyName(writer.HintValueName);
// // WriteValue(value, writer, privateWriter, depth + 1);
// // writer.WriteObjectEnd();
// //} else {
// WriteValue(value, writer, privateWriter, depth + 1);
// //}
// }
//}
}
writer.WriteObjectEnd();
}
private static ObjectMetadata AddObjectMetadata(Type type)
{
if (objectMetadata.ContainsKey(type))
{
return(objectMetadata[type]);
}
ObjectMetadata data = new ObjectMetadata();
if (type.GetInterface("System.Collections.IDictionary") != null)
{
data.IsDictionary = true;
}
data.Properties = new Dictionary <string, PropertyMetadata>();
// Get all kinds of declared properties
BindingFlags pflags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;
foreach (PropertyInfo pinfo in type.GetProperties(pflags))
{
if (pinfo.Name == "Item")
{
ParameterInfo[] parameters = pinfo.GetIndexParameters();
if (parameters.Length != 1)
{
continue;
}
if (parameters[0].ParameterType == typeof(string))
{
data.ElementType = pinfo.PropertyType;
}
continue;
}
// Include properties automatically that have at least one public accessor
bool autoInclude =
(pinfo.GetGetMethod() != null && pinfo.GetGetMethod().IsPublic) ||
(pinfo.GetSetMethod() != null && pinfo.GetSetMethod().IsPublic);
// If neither accessor is public and we don't have a [JsonInclude] attribute, skip it
if (!autoInclude && pinfo.GetCustomAttributes(typeof(JsonInclude), true).Count() == 0)
{
continue;
}
PropertyMetadata pdata = new PropertyMetadata();
pdata.Info = pinfo;
pdata.Type = pinfo.PropertyType;
object[] ignoreAttrs = pinfo.GetCustomAttributes(typeof(JsonIgnore), true).ToArray();
if (ignoreAttrs.Length > 0)
{
pdata.Ignore = true;
}
object[] aliasAttrs = pinfo.GetCustomAttributes(typeof(JsonAlias), true).ToArray();
if (aliasAttrs.Length > 0)
{
JsonAlias aliasAttr = (JsonAlias)aliasAttrs[0];
if (aliasAttr.Alias == pinfo.Name)
{
throw new JsonException(string.Format("Alias name '{0}' must be different from the property it represents for type '{1}'", pinfo.Name, type));
}
if (data.Properties.ContainsKey(aliasAttr.Alias))
{
throw new JsonException(string.Format("'{0}' already contains the property or alias name '{1}'", type, aliasAttr.Alias));
}
pdata.Alias = aliasAttr.Alias;
if (aliasAttr.AcceptOriginal)
{
data.Properties.Add(pinfo.Name, pdata);
}
}
if (pdata.Alias != null)
{
data.Properties.Add(pdata.Alias, pdata);
}
else
{
if (data.Properties.ContainsKey(pinfo.Name))
{
throw new JsonException(string.Format("'{0}' already contains the property or alias name '{1}'", type, pinfo.Name));
}
data.Properties.Add(pinfo.Name, pdata);
}
}
// Get all kinds of declared fields
BindingFlags fflags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;
foreach (FieldInfo finfo in type.GetFields(fflags))
{
// If the field isn't public and doesn't have an [Include] attribute, skip it
if (!finfo.IsPublic && finfo.GetCustomAttributes(typeof(JsonInclude), true).Count() == 0)
{
continue;
}
PropertyMetadata pdata = new PropertyMetadata();
pdata.Info = finfo;
pdata.IsField = true;
pdata.Type = finfo.FieldType;
object[] ignoreAttrs = finfo.GetCustomAttributes(typeof(JsonIgnore), true).ToArray();
if (ignoreAttrs.Length > 0)
{
pdata.Ignore = true;
}
object[] aliasAttrs = finfo.GetCustomAttributes(typeof(JsonAlias), true).ToArray();
if (aliasAttrs.Length > 0)
{
JsonAlias aliasAttr = (JsonAlias)aliasAttrs[0];
if (aliasAttr.Alias == finfo.Name)
{
throw new JsonException(string.Format("Alias name '{0}' must be different from the field it represents for type '{1}'", finfo.Name, type));
}
if (data.Properties.ContainsKey(aliasAttr.Alias))
{
throw new JsonException(string.Format("'{0}' already contains the field or alias name '{1}'", type, aliasAttr.Alias));
}
pdata.Alias = aliasAttr.Alias;
if (aliasAttr.AcceptOriginal)
{
data.Properties.Add(finfo.Name, pdata);
}
}
if (pdata.Alias != null)
{
data.Properties.Add(pdata.Alias, pdata);
}
else
{
if (data.Properties.ContainsKey(finfo.Name))
{
throw new JsonException(string.Format("'{0}' already contains the field or alias name '{1}'", type, finfo.Name));
}
data.Properties.Add(finfo.Name, pdata);
}
}
objectMetadata.Add(type, data);
return(data);
}
