serialization

问题 why we can't Serialize objects into Random Access file ? and on the other hand we can serialize objects into sequential access file ? ""C# does not provide a means to obtain an object’s size at runtime. This means that, if we serialize the class, we cannot guarantee a fixed-length record size "" (from the book that i read in). so we cannot read the the random access file because we don't know every object size in the file so how we could do seeking ?????? 回答1: Any object marked with the

问题 I implemented a Client and Server model that uses Socket with thread When I want to pass only a string from Client to the Server, it works. But I want to pass an object and it throws this error: "Attempting to deserialize an empty stream" Here is the code: Client: ASCIIEncoding asen = new ASCIIEncoding(); MemoryStream memoryStream = new MemoryStream(); BinaryFormatter binaryFormatter = new BinaryFormatter(); Command command = new Command("meuLogin", "minhaSenha"); binaryFormatter.Serialize

问题 I had a Route object and I saw that I can't serialize it. So I said I'll debug and try to serialize the objects from it, separately. This is my function: public JSONObject getRouteJson(Next_Step step) { JSONObject route = new JSONObject(); try { ObjectMapper mapper = new ObjectMapper(); mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false); RouteNonRealm r = new RouteNonRealm(step.getRoute()); String string = mapper.writeValueAsString(r.getDuration()); route.put("duration", string

问题 How can I serialize a tree (implemented in Java using the DefaultMutableTreeNode class) to JSON (for transferring via RESTful method to an iOS client)? I tried: String jsonString = (new Gson()).toJson(topNode); // topNode is DefaultMutableTreeNode at the root It crashed with StackOverflowError . 回答1: Swing's DefaultMutableTreeNode class is a tree-like data structure which contains instances of this same type both as children and as parent . That's why Gson's default serializer ran into

问题 This post https://stackoverflow.com/a/1708614/5333340 gives a solution on how to validate an xml during deserialization. It also says that similar code can be written for serialization, but I was not able to figure it out. Can someone give a hint? I want to do the validation during serialization, so that, if the validation fails at some point, the serialization stops immediately. Based on the linked answer my deserialization code, where validation takes place, looks like this: private static

问题 This post https://stackoverflow.com/a/1708614/5333340 gives a solution on how to validate an xml during deserialization. It also says that similar code can be written for serialization, but I was not able to figure it out. Can someone give a hint? I want to do the validation during serialization, so that, if the validation fails at some point, the serialization stops immediately. Based on the linked answer my deserialization code, where validation takes place, looks like this: private static

问题 I want to read lots of data(single column nvarchar(max)) from SQL Server 2005 and deserialize it to an object. We are currently using the following, but this is not fast enough is there a better/efficient way to do it? using(MemoryStream stream = Encoding.UTF8.GetBytes((string)cmd.ExecuteScalar())) { XmlTextReader xmlReader; DataContractSerializer deserializer; deserializer = new DataContractSerializer(typeToDeserialize); xmlReader = new XmlTextReader(stream); return deserializer.ReadObject

问题 My use case is I am training machine learners in python to find which model is most performant. But once I have finished choosing a model, I need to recapitulate that model in C for the shippable product. What we have been planning to do is pick apart the model in python, save all its parameters to a file, and load these in to a different model with the same structure in C. But this strikes me as unnecessarily complex if there is actually a way to save a trained model as some kind of black

问题 My use case is I am training machine learners in python to find which model is most performant. But once I have finished choosing a model, I need to recapitulate that model in C for the shippable product. What we have been planning to do is pick apart the model in python, save all its parameters to a file, and load these in to a different model with the same structure in C. But this strikes me as unnecessarily complex if there is actually a way to save a trained model as some kind of black

问题 I'm using jQuery and CodeIgniter to do this. Ok so basically I have a register form which asks the user for a username, password, and email. Once the form is submitted, jQuery would serialize the form and give it to a process page, echo the value out in the controller, and then the javascript would alert the post values in the original view. So far it isn't working. Nothing is being alerted. Here's my code: (The controller) register.php: <?php if (!defined('BASEPATH')) exit('No direct script