interface

问题 I have a set of classes as follows: a Command, which Executes and stores a Result; a Response, which is created as in order to return the Result in a serialized form (plus extra metadata which I've left out). The Response.Result must be of type object, as it is used for a bunch of different commands, each of which can have a Result of any type at all. The Command is generic, and I'd like it to accept an interface rather than concrete type, but when I do, the serialized response contains the

问题 This question already has answers here : Typescript typings, generics and abstract classes (2 answers) Closed 2 years ago . This is somewhat the transformation of a question I posted somewhere else yesterday. My objective is not to get a working result but to have a better understanding of the kind of design I can obtain while returning the correct types. This by using here a minimalist example, so please don't tell me it's useless or does nothing. Code sample (Try it in Typescript playground

问题 I'm having trouble using reflection in Go to fetch data from a cache dynamically into various statically declared struct types: func FetchFromCacheOrSomewhereElse(cacheKey string, returnType reflect.Type) (out interface {}, err error) { fetchFromCache := reflect.New(returnType).Interface(); _, err=memcache.Gob.Get(*context, cacheKey, &fetchFromCache); if (err==nil) { out=reflect.ValueOf(fetchFromCache).Elem().Interface(); } else if (err==memcache.ErrCacheMiss) { /* Fetch data manually... */ }

问题 We have to share our code base with a partner for developing, but we don't want to reveal the implementation of some services. Say we have an interface FooService and its implementation FooServiceImpl . public interface FooService { void doSomething(); } @Service public class FooServiceImpl implements FooService { @Override public String doSomething(); { ... } } Many other classes autowire this service in and call doSomething(). For example: @Service public class BarServiceImpl implements

问题 First, sorry for the vaque title, but I don't know a good title for my question. In my application I use criteria. The criteria can be seen as controls. I have textboxes, but also radio buttons and check boxes. I use interfaces to achieve this: ICriteria is the base interface where all criteria classes inherits from. TextType inherits from ICriteria. RadioType also inherits from ICriteria. But, RadioType must have choices. Both, TextType and RadioType do have some properties which are the

问题 I have a problem with dynamically loaded assemblys and casting it to interface. Where is my mistake? Main app (load plugins): namespace Console_IFce_Test { class Program { static void Main(string[] args) { Console.WriteLine("Press any key to find IPlugin library..."); Console.ReadKey(); string[] files = Directory.GetFiles(Directory.GetCurrentDirectory(), "*.dll"); Console.WriteLine("Loading assembly: {0}", Path.GetFileName(files[0])); Assembly asm = Assembly.LoadFrom(files[0]); //Trying this,

问题 I have an Object[] in Java and want to convert it to IProject[], which is a Java interface (org.eclipse.core.resources.IProject), in order to write a plugin for eclipse. Is this possible? Regards 回答1: You can't convert the array itself - arrays know the type of their slots, so you can't just cast an instance of Object[] to an expression of type IProject[] , even if the array happens to contain only instances of IProject (unless you happen to have a variable of type Object[] which actually

问题 i have a method: procedure Frob(Sender: TObject); that i want to call when i click a menu item. The method comes to me though an interface: animal: IAnimal; IAnimal = interface procedure Frob(Sender: TObject); end; The question revolves around what to assign to the OnClick event handler of a menu item (i.e. control): var animal: IAnimal; ... begin ... menuItem := TMenuItem.Create(FileMenu) menuItem.Caption := 'Click me!'; menuItem.OnClick := <-------- what to do ... end; The obvious choice,

问题 Okay, to reproduce, here is what you need public interface IWorkbookSet { IWorkbooks Workbooks { get; } } public interface IWorkbooks : IEnumerable { IWorkbook this[int index] { get; } IWorkbook this[string name] { get; } int Count { get; } } public interface IWorkbook { IWorksheets Worksheets { get; } } public interface IWorksheets : IEnumerable { IWorksheet this[int index] { get; } IWorksheet this[string name] { get; } int Count { get; } IWorksheet Add(); IWorksheet AddAfter(IWorksheet

问题 I'm implementing an architecture when i have a container of heterogeneous objects which may have or not some common methods-attribute. I need to cycle through them and apply some functions, update some members, and call some methods over the various interfaces. I've come up to what i believe a "standard" architecture, based on inheritance: #include <vector> #include <memory> #include <iostream> using namespace std; struct Base { virtual ~Base() {} }; struct PositionInterface { int x = 0; int