Ok I have a generic interface public IConfigurationValidator<T> { void Validate(); } a class that implements it: public class SMTPServerValidator : IConfigurationValidator<string> { public void Validate(string value) { if (string.IsNullOrEmpty(value)) { throw new Exceptio...
I'm not sure what I'm wanting to do is even a good idea, but here's the problem anyway: I have MyClass which I want to implement two different types of the generic IEnumerable class, e.g. public class MyClass : IEnumerable<KeyValuePair<string, string>>, IEnumerable<KeyValuePair<MyEnum, string>> Now, the problem...
I'm working on a CRUD testing class because I got tired of duplicating the same test patterns when validating my NHibernate mappings. I've refactored the code and have reached the point where everything is working the way I envisioned it with one glaring irritation. Everything is based on strings which are used by reflection methods t...
Hi Why can I not cast a List<ObjBase> as List<Obj>? Why does the following not work: internal class ObjBase { } internal class Obj : ObjBase { } internal class ObjManager { internal List<Obj> returnStuff() { return getSomeStuff() as List<Obj>; } private List<ObjBase> getSomeStuff() { ...
Hi All, I'm trying to figure a way to create a generic class for number types only, for doing some calculations. Is there a common interface for all number types (int, double, float...) that I'm missing??? If not, what will be the best way to create such a class? UPDATE: The main thing I'm trying to achieve is checking who is the bi...
The following method generates a warning, but it looks safe to me. I'm sure the problem is with me: public <S extends CharSequence> S foo(S s) { return (S) new StringBuilder(s); } It looks like this will always return the argument s. Can anyone show an example that would cause this method to throw an exception? Edit: I'm not p...
Yesterday I attempted to create an array of objects, belonging to a non-static inner class of a generic class. It seems that there is no nice way of doing so. First attempt: public class Wibble<T>{ public static void main(String...args){ new Wibble<String>(); } public Wibble(){ Bar...
Got this idea from this previous question. http://stackoverflow.com/questions/529085/java-how-to-generic-array-creation Anyway, my code is like this: public class Slice<E> { private E[] data; public Slice(Class<E> elementType, int size) { //@SuppresWarnings({"unchecked"}) data = (E[])Array.newInstance(elementType...
I would like to do something like the below public interface IFormatter<TData, TFormat> { TFormat Format(TData data); } public abstract class BaseFormatter<TData> : IFormatter<TData, XElement> { public abstract XElement Format(TData data); } However, when I do the above I get an error about "The type or method has 2 generic p...
I have a set-up similar to WPF's DependencyProperty and DependencyObject system. My properties however are generic. A BucketProperty has a static GlobalIndex (defined in BucketPropertyBase) which tracks all BucketProperties. A Bucket can have many BucketProperties of any type. A Bucket saves and gets the actual values of these BucketProp...
Hi all, I want to check if a generic variable is of a certain type but don't want to check the generic part. Let's say I have a variable of List<int> and another of List<double>. I just want to check if it is of type List<> if(variable is List) {} And not if (variable is List<int> || variable is List<double>) {} is this possible...
Hi, When doing some not really fancy things with Java, I came over an error with generics that I was not able to understand why it doesn't work. The code is: package test; import java.util.*; public class TestClass { public static class A extends C{} public static class B extends C{} public static class C{} public static class ...
Since generics are only checked during compile time with Java 5, can they avoid ClassCastExceptions in all situations? ...
Possible Duplicate: Upcasting and generic lists Ok, I want to send a List<CardHolder> as an IEnumerable<ICardHolder> where CardHolder : ICardHolder. However, the compiler errors: Error 4 Argument '1': cannot convert from 'System.Collections.Generic.List' to 'System.Collections.Generic.IEnumerable' This seems strange to me...
Hi, I am trying to make an extension method that will shuffle the contents of a generic list collection regardless of its type however im not sure what to put in between the <..> as the parameter. do i put object? or Type? I would like to be able to use this on any List collection i have. Thanks! public static void Shuffle(this List<??...
If I want a method that returns the default value of a given type and the method is generic I can return a default value like so: public static T GetDefaultValue() { return default(T); } Can I do something similar in case I have the type only as a System.Type object? public static object GetDefaultValue(Type type) { //??? } ...
Can I pass a method with an out parameter as a Func? public IList<Foo> FindForBar(string bar, out int count) { } // somewhere else public IList<T> Find(Func<string, int, List<T>> listFunction) { } Func needs a type so out won't compile there, and calling listFunction requires an int and won't allow an out in. Is there a way to do th...
I'm designing a reporting engine for my project. The project will have several reports, each of which can be expressed as a Linq query; some will have parameters, while others won't. Now in order to meet my clients' requirements, I need to return the results of the queries in XML format, so that they can apply an XSL transform to make ...
I'm writing a system that has a set of protocol buffers (using protobuf-net), I want to define something like this in an abstract class they all inherit off: public byte[] GetBytes() however, the protocol buffer serealiser requires a type argument, is there some efficient way to get the type of the inheriting class? Example: public ...
What is Type<Type> type; called (opposed to) Type type; You know, where you put the angle brackets around the type? I use this a lot, but don't know the name - it's bugging me. It's very hard to search for - Google ignores the <> characters. (note: this is Java) ...