static object Deserialize(object value, Type optionType)
{
if (optionType.IsValueType)
{
// check if we have a nullable, then returning null is ok
var isNullable = optionType.IsGenericType && optionType.GetGenericTypeDefinition() == typeof(Nullable <>);
if (value == null)
{
if (!isNullable)
{
throw new SerializationException();
}
}
else
{
if (isNullable && optionType.GenericTypeArguments [0] == value.GetType())
{
optionType = value.GetType();
}
}
}
if (optionType.IsEnum)
{
if (value != null && optionType.IsEnumDefined(value))
{
return(Enum.ToObject(optionType, value));
}
throw new SerializationException();
}
if (RoslynPreferences.TryGetSerializationMethods <object> (optionType, out var serializer, out var deserializer))
{
if (value is string serializedValue)
{
return(deserializer(serializedValue));
}
}
if (value != null && optionType != value.GetType())
{
// We got something back different than we expected, so fail to deserialize
throw new SerializationException();
}
return(value);
}
static object Deserialize(object value, Type optionType)
{
if (optionType.IsEnum && value != null && optionType.IsEnumDefined(value))
{
return(Enum.ToObject(optionType, value));
}
if (RoslynPreferences.TryGetSerializationMethods <object> (optionType, out var serializer, out var deserializer) && value is string serializedValue)
{
return(deserializer(serializedValue));
}
if (optionType == typeof(bool))
{
// TypeScript used to store some booleans as integers. We now handle them properly for legacy sync scenarios.
if (value is int intValue)
{
return(intValue != 0);
}
if (value is long longValue)
{
return(longValue != 0);
}
}
if (optionType == typeof(bool?))
{
// code uses object to hold onto any value which will use boxing on value types.
// see boxing on nullable types - https://msdn.microsoft.com/en-us/library/ms228597.aspx
if (!(value is bool) && value != null)
{
throw new SerializationException();
}
}
else if (value != null && optionType != value.GetType())
{
// We got something back different than we expected, so fail to deserialize
throw new SerializationException();
}
return(value);
}