I have many html forms referring to many persistence classes. All the html forms are generated by one single class HTMLForm by passing in the respective HTMLFields instances: public class HTMLForm<T>{ HTMLForm(HTMLFields[] f, Class<T> classt){ this.stupidSunWontAllowTnewInstance = classt; // ... whatever GWT jazz .... } public...
Hi all, I have a generic class, says : MyClass<T> Inside a method of this class, I would like to test the type of T, for example : void MyMethod() { if (T == String) ... if (T == int) ... } how can I do that ? Thanks for your help ...
Assume following: public class MyFunkyTable : DbObject { // this class will be generated } public class MyFunkyDomainObject : DomainObject { // this class will be custom-made } public class MyFunkyMapper : Mapper<MyFunkyTable, MyFunkyDomainObject> { // this will be custom mapping code due to wired abstraction and ... "supe...
How can I find a generic overloaded method? For example, Queryable's public static IQueryable<TResult> Select<TSource , TResult> ( this IQueryable<TSource> source , Expression<Func<TSource , int , TResult>> selector ); I've looked for existing solutions, and they're either not generic enough (are based on the method's parameters count...
I have a list of integer values (List) and would like to generate a string of comma delimited values. That is all items in the list output to a single comma delimted list. My thoughts... 1. pass the list to a method. 2. Use stringbuilder to iterate the list and append commas 3. Test the last character and if it's a comma, delete it. Wh...
Excuse me if this is a dupe, but I couldn't seem to get the right combo of keywords to filter down the various type constraint and generics questions out there (as there are a lot). I have two interfaces--let's call them IOnline and IOffline. They're closely related in that they describe nearly identical contracts, but one of the key...
Trying to learn some f# and I've run into a couple of hangups. Here's the code: #light module HtmlModule type HtmlString(text:string) = override x.ToString() = text type HtmlAttribute(key:string, value:string) = inherit HtmlString(key + "=\"" + value + "\""); type HtmlElement(tag: string, ?contents:list<'a> when 'a :> HtmlSt...
The following doesn't compile: public void MyMethod<T>(T value) { if (value == default(T)) { // do stuff } } Error: Operator '==' cannot be applied to operands of type 'T' and 'T' I can't use value == null because T may be a struct. I can't use value.Equals(default(T)) because value may be null. What is the proper...
Possible Duplicate: How to cast generic List types in java? When this is feasible Number number = new Integer(""); Why not this ? List<Number> list = new LinkedList<Integer>(); ...
Hi, I'm trying to create java to xsd for a java type that looks like this. public class MainRequest<E extends AParentType<Person>> extends EObject { private Transaction tran; private E e; private String email; } public class SubRequest extends MainRequest<AChildType> { } where AChildType extends AParentType. when i try to create a s...
Hey everyone! I am studying Data Structures in java and I am having difficulty with using generics in Binary Search Trees. For our assignment we are to implement a Binary Search Tree using nodes that contain a parent, left and right node as well as a data value. The data value in our case takes the form of a Pair object. This is what i...
The main problem of this question is when we pass T into some function and use it to cast some object like the following statement. void SomeFunction<T> (object model) { (SomeClass<T>)model; } Everything works fine. But I want to cast model object to generic class object that is parent of T or grand parent of T depend on what is n...
I am working on an ASP.Net MVC website and I am stuck on a getting my C# code using generics to play nice with my views. I have a Controller that passes a Model to a View (so far so good). The Model is of type IDescribedEnumerable<T> with some constraints on T, among those is the constraint that T inherits from an interface (IDescribedM...
Coming from OO (C#, Java, Scala) I value very highly the principles of both code reuse and type-safety. Type arguments in the above languages do the job and enable generic data structures which are both type-safe and don't 'waste' code. As I get stuck into C, I'm aware that I have to make a compromise and I'd like it to be the right one...
Is it possible to get the type of a generic parameter? An example: public final class voodoo { public static chill(List<?> aListWithTypeSpiderMan) { // Here I'd like to get the Class-Object 'SpiderMan' Class typeOfTheList = ???; } public static void main(String... args) { chill(new List<SpiderMan>(...
As you all know creating a web service with generic methods is not possible. You have to design the message. But I had the idea of creating a wrapper around WCF using Reflection. public class WcfRepository<T> : IWcfRepository<T> where T : class { public IList<T> GetList() { Type wcfService = typeof ...
UPDATE: Didn't give a great example. Hopefully it's better now. Is there a better way than this: (typeof(TRepository) == typeof(UserClass)) Here's the use in writing: public static IBaseRepository<TClass> GetRepository<TClass>() where TClass : IDataEntity { IBaseRepository<TClass> repository = null; if (typeof(TClass) == type...
I have the following classes: public abstract class Item { //... } public class Customer : Item { //... } public class Address : Item { //... } I want to be able to create exact clones using a custom reflection class like this: Customer customer = new Customer(); ItemReflector irCustomer = new ItemReflector(custom...
Having the following simple class structure: class A{} class B extends A{} class C extends B{} I'm creating an ArrayList to keep objects of the earlier created classes: List<? extends A> list1 = new ArrayList<A>(); List<? extends B> list2 = new ArrayList<B>(); List<? extends C> list3 = new ArrayList<C>(); List<? super A> list...
Is it possible to create an extension method on the DataContext, not on the table in the datacontext but directly on the dataContext to get dynamicly a table. ex: DataContext dc = new DataContext(); var test = from a in dc.myExtensionMethod(args) select a; ps: I Already know dc.GetTAble and dc.GetTable<T> ...