Thanks guys for your answers. Chris Dail – I tried your approach, and it didn’t really do what I wanted. JAXB was still ignoring my null values, in spite of defining a default value for my fields. I did stumble across the answer after somebody in the Jersey forums pointed me to documentation section 2.2.12.8 … Read more
So if I want to pass a list to my callback function through WinApi I use GCHandle // object to IntPtr (before calling WinApi): List<string> list1 = new List<string>(); GCHandle handle1 = GCHandle.Alloc(list1); IntPtr parameter = (IntPtr) handle1; // call WinAPi and pass the parameter here // then free the handle when not needed: handle1.Free(); … Read more
There are times when you cannot define a struct in advance but still require numbers to pass through the marshal-unmarshal process unchanged. In that case you can use the UseNumber method on json.Decoder, which causes all numbers to unmarshal as json.Number (which is just the original string representation of the number). This can also useful … Read more
There is cleaner syntax if you’re using a recent version of .net #include “stdafx.h” #include <string> #include <msclr\marshal_cppstd.h> using namespace System; int main(array<System::String ^> ^args) { System::String^ managedString = “test”; msclr::interop::marshal_context context; std::string standardString = context.marshal_as<std::string>(managedString); return 0; } This also gives you better clean-up in the face of exceptions. There is an msdn article … Read more
Don’t unmarshall a custom class (i.e. one provided by your application and not by the Android framework) with the framework class loader that is used when you give null as the ClassLoader argument. Use the application class loader: parcel.readList(myclassList, getClass().getClassLoader()); Whenever a Parcel.read*() method also has a ClassLoader as an argument (e.g. Parcel.readList(List outVal, ClassLoader … Read more
This is handled by adding ,string to your tag as follows: type tySurvey struct { Id int64 `json:”id,string,omitempty”` Name string `json:”name,omitempty”` } This can be found about halfway through the documentation for Marshal. Please note that you cannot decode the empty string by specifying omitempty as it is only used when encoding.
You must always use the Marshal.GetLastWin32Error. The main problem is the garbage collector. If it runs between the call of SetVolumeLabel and the call of GetLastError then you will receive the wrong value, because the GC has surely overwritten the last result. Therefore you always need to specify the SetLastError=true in the DllImport-Attribute: [DllImport(“kernel32.dll”, SetLastError=true)] … Read more
Take a look at GWT’s Overlay Types. I think this is by far the easiest way to work with JSON in GWT. Here’s a modified code example from the linked article: public class Customer extends JavaScriptObject { public final native String getFirstName() /*-{ return this.first_name; }-*/; public final native void setFirstName(String value) /*-{ this.first_name = … Read more
Because this was not answered in “answer” but in comment I will post an answer: As @Max-Gontar pointed you should use LocationType.class.getClassLoader() to get the correct ClassLoader and get rid of ClassNotFound exception, i.e.: in.readParceleable(LocationType.class.getClassLoader());
It’s a little old thread, but I recently made excessive performance tests with marshaling in C#. I need to unmarshal lots of data from a serial port over many days. It was important to me to have no memory leaks (because the smallest leak will get significant after a couple of million calls) and I … Read more