marshalling

问题 I have a Java class annotated with @XmlRootElement . This Java class has a long property ( private long id ) that I want to return to a JavaScript-client. I create the JSON as follows: MyEntity myInstance = new MyEntity("Benny Neugebauer", 2517564202727464120); StringWriter writer = new StringWriter(); JSONConfiguration config = JSONConfiguration.natural().build(); Class[] types = {MyEntity.class}; JSONJAXBContext context = new JSONJAXBContext(config, types); JSONMarshaller marshaller =

问题 I have some active record models which have a "published_on" attribute. When I attempt to cache models with a published_on date prior to 1/1/1900, I get an error such as: Marshalling error for key 'popular_products': year too big to marshal: 1300 UTC You are trying to cache a Ruby object which cannot be serialized to memcached. I can reproduce a similar error with ruby: irb(main)> Marshal.dump( Time.parse("1/1/1900") ) ArgumentError: year too big to marshal: 1899 UTC What's the right approach

问题 Consider the following struct to be sent over TCP to an unmanaged dll [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)] public struct FooMessage { [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 42)] public string foo; //More fields... } Using the following function (credit to Cheeso): public byte[] RawSerialize( T item ) { int rawSize = Marshal.SizeOf( typeof(T) ); IntPtr buffer = Marshal.AllocHGlobal( rawSize ); Marshal.StructureToPtr( item, buffer, false ); byte[]

问题 I am working on an enterprise application development. the entire application is developed in c++, except the UI, which is developed in c#, now its time to hookup the UI with c++ code. After detailed study i choose PInvoke in order to do so. All is successful, the only case where i stuck is that how can i pass collection to C++ code. e.g: C# Side Code List<string> lst = new List<string>(); lst.Add("1"); lst.Add("2"); lst.Add("3"); lst.Add("4"); C++ Side Code std::vector<std::string> vStr; Now

问题 I am working on an enterprise application development. the entire application is developed in c++, except the UI, which is developed in c#, now its time to hookup the UI with c++ code. After detailed study i choose PInvoke in order to do so. All is successful, the only case where i stuck is that how can i pass collection to C++ code. e.g: C# Side Code List<string> lst = new List<string>(); lst.Add("1"); lst.Add("2"); lst.Add("3"); lst.Add("4"); C++ Side Code std::vector<std::string> vStr; Now

问题 Here is my C# server method: public void Exec(out int status, string output) { status = 3; Console.WriteLine("Exec({0}, ...)", status); output = string.Format("Hello from .NET {0}", DateTime.Now); Console.WriteLine("Exec(..., {0})", output); } My C++ client is setting up and calling this method. This works fine, but the status and output variables don't appear to be chaining. It's as though they're being passed by value instead of by reference. Here's my client code: InitCLR(); LONG index = 0

问题 I am wanting to update an array that was created inside C#, and then pass a pointer to that array over to C++ and let C++ populate the indexes, to be used back in C#. Right now I am Using a Marshal.Copy() to accomplish this task, but I would like to avoid the potentially unnecessary copy, and call back to c++ to release the array. Is this even possible? These array are floats and ints, for geometric mesh data. My current usage (working and not what I want to use) C# IntPtr intptr=new IntPtr()

问题 I am using flask_restplus to create a documented API. The marshal decorator controls what data actually gets rendered in your response, but I am having trouble rendering the data. I have the following code: kpis_model = api.model('kpis', { 'cpl_actual': fields.Integer(description='costo por lead total del mes actual'), 'cpl_anterior': fields.Integer(description='costo por lead total del mes anterior'), 'cpl_diferencia': fields.Integer(description='diferencia de cpl_actual y cpl_anterior') })

问题 The following is a bit of C++ that is verified working: typedef struct { PVOID buffer; UINT32 length; } DATA_BUFFER; typedef struct { DATA_BUFFER TxBuf [1]; DATA_BUFFER RxBuf [1]; } JVM_COMM_BUFFER; UINT32 SendAndRecv( IN JHI_HANDLE handle, IN CHAR* AppId, INOUT JVM_COMM_BUFFER* pComm ); The following is my attempt to port that to C#: [StructLayout(LayoutKind.Sequential)] public struct DATA_BUFFER { public byte[] buffer; public uint length; } [StructLayout(LayoutKind.Sequential)] public

问题 I have a working wrapper class for Dallmeier camera devices, It contains a callback method to receive the current YUV image. See details C# wrapper for array of three pointers. I have a button on my form that gets the YUV Image. The callback returns 'yuvData' which is an array of three pointers to Y, U, and V part of image. I then copy the three pointers into thier own pointer and then copy them into a byte array. The yuvCallback continues to run until I disconnect the camera. Am I using