serialization

问题 I'm a student currently dabbling in a .Net n-tier app that uses Nhibernate+WCF+WPF. One of the things that is done quite terribly is object graph serialisation, In fact it isn't done at all, currently associations are ignored and we are using DTOs everywhere. As far as I can tell one method to proceed is to predefine which objects and collections should be loaded and serialised to go across the wire, thus being able to present some associations to the client, however this seems limited,

问题 Im using Flink (latest via git) to stream from kafka to cassandra. To ease unit testing Im adding dependency injection via Dagger. The ObjectGraph seems to be setting itself up properly but the 'inner objects' are being flagged as 'not serializable' by Flink. If I include these objects directly they work - so what's the difference? Class in question implements MapFunction and @Inject a module for cassandra and one for reading config files. Is there a way to build this so I can use late

问题 I'm having some issues trying to serialize/deserialize a complex object graph using protobuf-net. I'm working on a legacy application and we're using .Net Remoting to connect a GUI client to a C# service. We are seeing poor performance with overseas users due to the serialized size of our object graphs using the default BinaryFormatter , which is exacerbated by the limited bandwidth in-between the client and server (1Mbit/s). As a quick win, I thought I'd put together a proof of concept to

问题 When I instantiate an object from a class, an object is saved in the java heap. When I save the object by serializing it and I later deserialize the object, do I understand correctly that the object will now have a new heap address but will still be the EXACT SAME instance of the class. 回答1: The answer to your question cannot be just a yes or no. To analyze the concept is required. I will suggest you to take a pencil and paper and do it yourself keeping the below points in mind. All java

问题 I have an Item class. There's an itemType field inside of that class which is of type ItemType. roughly, something like this. class Item { int id; ItemType itemType; } class ItemType { String name; int somethingElse; } When I am serializing an object of type Item using Jackson ObjectMapper , it serializes the object ItemType as a sub-object. Which is expected, but not what I want. { "id": 4, "itemType": { "name": "Coupon", "somethingElse": 1 } } What I would like to do is to show the itemType

问题 Let's look at the code, generated by F# for simple function: let map_add valueToAdd xs = xs |> Seq.map (fun x -> x + valueToAdd) The generated code for lambda expression (instance of F# functional value) will looks like this: [Serializable] internal class map_add@3 : FSharpFunc<int, int> { public int valueToAdd; internal map_add@3(int valueToAdd) { this.valueToAdd = valueToAdd; } public override int Invoke(int x) { return (x + this.valueToAdd); } } And look at nearly the same C# code: using

问题 Let's look at the code, generated by F# for simple function: let map_add valueToAdd xs = xs |> Seq.map (fun x -> x + valueToAdd) The generated code for lambda expression (instance of F# functional value) will looks like this: [Serializable] internal class map_add@3 : FSharpFunc<int, int> { public int valueToAdd; internal map_add@3(int valueToAdd) { this.valueToAdd = valueToAdd; } public override int Invoke(int x) { return (x + this.valueToAdd); } } And look at nearly the same C# code: using

问题 I have structure like this: public interface A { public void method(); } public class B : A { } public class C : A { } List<A> list; List contains objects of type B and C they also have some fields that I would like to keep, can I now serialize it, deserialize back and get the proper object instances? Preferably to XML EDIT: Is there any simple way to serialize this list that contains interfaces, and then deserialize it back to B and C instances? 回答1: You may try using DataContractSerializer:

问题 In my app I have to download JSON data from numerous web services. The data classes I use are fairly complex ones (lots of properties, quite deep inheritance tree, etc.). I intend to do caching, using a single db table, where I'd store the downloaded JSON data in a VARCHAR column (along with other meta-data containing columns). JSON serialization is being done with the Gson library. It seems quite convenient to just dump the instances into JSON, and parse them again later when I need them. No

问题 In my app I have to download JSON data from numerous web services. The data classes I use are fairly complex ones (lots of properties, quite deep inheritance tree, etc.). I intend to do caching, using a single db table, where I'd store the downloaded JSON data in a VARCHAR column (along with other meta-data containing columns). JSON serialization is being done with the Gson library. It seems quite convenient to just dump the instances into JSON, and parse them again later when I need them. No