private object CoerceType(Type targetType, IDictionary value, out Dictionary <string, MemberInfo> memberMap)
{
object newValue = this.InstantiateObject(targetType, out memberMap);
if (memberMap != null)
{
// copy any values into new object
foreach (object key in value.Keys)
{
MemberInfo memberInfo;
Type memberType = TypeCoercionUtility.GetMemberInfo(memberMap, key as String, out memberInfo);
this.SetMemberValue(newValue, memberType, memberInfo, value[key]);
}
}
return(newValue);
}
private void PopulateObject(ref object result, Type objectType, Dictionary <string, MemberInfo> memberMap, Type genericDictionaryType)
{
if (this.Source[this.index] != JsonReader.OperatorObjectStart)
{
throw new JsonDeserializationException(JsonReader.ErrorExpectedObject, this.index);
}
#if WINPHONE_8
IDictionary idict = result as IDictionary;
#else
IDictionary idict = result as IDictionary;
if (idict == null && objectType.GetInterface(JsonReader.TypeGenericIDictionary) != null)
{
throw new JsonDeserializationException(
String.Format(JsonReader.ErrorGenericIDictionary, objectType),
this.index);
}
#endif
JsonToken token;
do
{
Type memberType;
MemberInfo memberInfo;
// consume opening brace or delim
this.index++;
if (this.index >= this.SourceLength)
{
throw new JsonDeserializationException(JsonReader.ErrorUnterminatedObject, this.index);
}
// get next token
token = this.Tokenize(this.Settings.AllowUnquotedObjectKeys);
if (token == JsonToken.ObjectEnd)
{
break;
}
if (token != JsonToken.String && token != JsonToken.UnquotedName)
{
throw new JsonDeserializationException(JsonReader.ErrorExpectedPropertyName, this.index);
}
// parse object member value
string memberName = (token == JsonToken.String) ?
(String)this.ReadString(null) :
this.ReadUnquotedKey();
//
if (genericDictionaryType == null && memberMap != null)
{
// determine the type of the property/field
memberType = TypeCoercionUtility.GetMemberInfo(memberMap, memberName, out memberInfo);
}
else
{
memberType = genericDictionaryType;
memberInfo = null;
}
// get next token
token = this.Tokenize();
if (token != JsonToken.NameDelim)
{
throw new JsonDeserializationException(JsonReader.ErrorExpectedPropertyNameDelim, this.index);
}
// consume delim
this.index++;
if (this.index >= this.SourceLength)
{
throw new JsonDeserializationException(JsonReader.ErrorUnterminatedObject, this.index);
}
object value;
// Reference to previously deserialized value
if (Settings.HandleCyclicReferences && memberName == "@ref")
{
// parse object member value
int refId = (int)this.Read(typeof(int), false);
// Change result object to the one previously deserialized
result = previouslyDeserialized[refId];
// get next token
// this will probably be the end of the object
token = this.Tokenize();
continue;
}
else
{
// Normal serialized value
// parse object member value
value = this.Read(memberType, false);
}
if (idict != null)
{
if (objectType == null && this.Settings.IsTypeHintName(memberName))
{
result = this.Settings.Coercion.ProcessTypeHint(idict, value as string, out objectType, out memberMap);
}
else
{
idict[memberName] = value;
}
}
else
{
this.Settings.Coercion.SetMemberValue(result, memberType, memberInfo, value);
}
// get next token
token = this.Tokenize();
} while (token == JsonToken.ValueDelim);
if (token != JsonToken.ObjectEnd)
{
throw new JsonDeserializationException(JsonReader.ErrorUnterminatedObject, this.index);
}
// consume closing brace
this.index++;
//return result;
}
internal object CoerceType(Type targetType, object value)
{
bool isNullable = TypeCoercionUtility.IsNullable(targetType);
if (value == null)
{
if (!allowNullValueTypes &&
targetType.IsValueType &&
!isNullable)
{
throw new JsonTypeCoercionException(String.Format(TypeCoercionUtility.ErrorNullValueType, targetType.FullName));
}
return(value);
}
if (isNullable)
{
// nullable types have a real underlying struct
Type[] genericArgs = targetType.GetGenericArguments();
if (genericArgs.Length == 1)
{
targetType = genericArgs[0];
}
}
Type actualType = value.GetType();
if (targetType.IsAssignableFrom(actualType))
{
return(value);
}
if (targetType.IsEnum)
{
if (value is String)
{
if (!Enum.IsDefined(targetType, value))
{
// if isn't a defined value perhaps it is the JsonName
foreach (FieldInfo field in targetType.GetFields())
{
string jsonName = JsonNameAttribute.GetJsonName(field);
if (((string)value).Equals(jsonName))
{
value = field.Name;
break;
}
}
}
return(Enum.Parse(targetType, (string)value));
}
else
{
value = this.CoerceType(Enum.GetUnderlyingType(targetType), value);
return(Enum.ToObject(targetType, value));
}
}
if (value is IDictionary)
{
Dictionary <string, MemberInfo> memberMap;
return(this.CoerceType(targetType, (IDictionary)value, out memberMap));
}
if (typeof(IEnumerable).IsAssignableFrom(targetType) &&
typeof(IEnumerable).IsAssignableFrom(actualType))
{
return(this.CoerceList(targetType, actualType, (IEnumerable)value));
}
if (value is String)
{
if (targetType == typeof(DateTime))
{
DateTime date;
if (DateTime.TryParse(
(string)value,
DateTimeFormatInfo.InvariantInfo,
DateTimeStyles.RoundtripKind | DateTimeStyles.AllowWhiteSpaces | DateTimeStyles.NoCurrentDateDefault,
out date))
{
return(date);
}
}
else if (targetType == typeof(Guid))
{
// try-catch is pointless since will throw upon generic conversion
return(new Guid((string)value));
}
else if (targetType == typeof(Char))
{
if (((string)value).Length == 1)
{
return(((string)value)[0]);
}
}
else if (targetType == typeof(Uri))
{
Uri uri;
if (Uri.TryCreate((string)value, UriKind.RelativeOrAbsolute, out uri))
{
return(uri);
}
}
else if (targetType == typeof(Version))
{
// try-catch is pointless since will throw upon generic conversion
return(new Version((string)value));
}
}
else if (targetType == typeof(TimeSpan))
{
return(new TimeSpan((long)this.CoerceType(typeof(Int64), value)));
}
#if !WINPHONE_8
TypeConverter converter = TypeDescriptor.GetConverter(targetType);
if (converter.CanConvertFrom(actualType))
{
return(converter.ConvertFrom(value));
}
converter = TypeDescriptor.GetConverter(actualType);
if (converter.CanConvertTo(targetType))
{
return(converter.ConvertTo(value, targetType));
}
#endif
try
{
// fall back to basics
return(Convert.ChangeType(value, targetType));
}
catch (Exception ex)
{
throw new JsonTypeCoercionException(
String.Format("Error converting {0} to {1}", value.GetType().FullName, targetType.FullName), ex);
}
}