overriding

I have this situation that when AbstractMethod method is invoked from ImplementClass I want to enforce that MustBeCalled method in the AbstractClass is invoked. I’ve never come across this situation before. Thank you! public abstract class AbstractClass { public abstract void AbstractMethod(); public void MustBeCalled() { //this must be called when AbstractMethod is invoked } } public class ImplementClass : AbstractClass { public override void AbstractMethod() { //when called, base.MustBeCalled() must be called. //how can i enforce this? } } An option would be to have the Abstract class do the

I'm trying to invoke the RegisterType method in the Unity container. RegisterType has a total of 16 overrides (some of those are parameters some are types). I'm trying to perform the equivalent of: Container.RegisterType<IMyDataProvider, MockData.MockProvider>("MockData", new ContainerControlledLifetimeManager()) Using GetMethod() was a total failure, so I ended up doing this ugly thing: MethodInfo registerTypeGeneric = Container.GetType().GetMethods(BindingFlags.Public | BindingFlags.Instance). Where(p => p.ToString() == "Microsoft.Practices.Unity.IUnityContainer RegisterType[TFrom,TTo]

In times before C++11 when a virtual function was overriden in a derived class, it was recommended to add the virtual keyword also to the derived class function to make the intention clear. Nowadays such a function is marked "override" which kind of includes the notion that there must be a virtual base function. Therefore I am now preferring to omit the virtual: class Derived: public Base { public: void Overriden() override; // Instead of: virtual void Overriden() override; }; However this leads to an IntelliSense error in MSVC 2012: the 'override' modifier requires a virtual function

In practice, the toString method should return a String representation of the object. In one project, I found some classes that override the toString method allowing return null. Like: @Override public String toString() { ....... return null; } For me, this practice is a violation to the principal propose of toString method that should return a String representation of the object. The API documentation for Object.toString() says: public String toString() Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The

As per the rule, while overriding a method in subclass, parameters cannot be changed and have to be the same as in the super class. What if we pass subclass of parameter while overriding method ? Will it be called as overloading or overriding? Based on my query I have written some code below. I was expecting the output as "Dog eats Flesh Food" but to my surprise the output is "Animal eats Flesh Food" Will appreciate if someone can explain how does Animal method gets called when the object assigned is of type Dog ? class Food { public String toString(){ return "Normal Food"; } } class Flesh

class GrandParent { public virtual void Foo() { ... } } class Parent : GrandParent { public override void Foo() { base.Foo(); //Do additional work } } class Child : Parent { public override void Foo() { //How to skip Parent.Foo and just get to the GrandParent.Foo base? //Do additional work } } As the code above shows, how can I have the Child.Foo() make a call into GrandParent.Foo() instead of going into Parent.Foo()? base.Foo() takes me to the Parent class first. Your design is wrong if you need this. Instead, put the per-class logic in DoFoo and don't call base.DoFoo when you don't need to.

Is there anyway to override a method at run time? Even if it requires dynamically creating a subclass from that instance? With plain Java, no. With ByteBuddy (preferred), asm , cglib or aspectj , yes. In plain Java, the thing to do in a situation like that is to create an interface-based proxy that handles the method invocation and delegates to the original object (or not). You could create an anonymous class that overrides the method and uses the strategy pattern to decide what to do. If you are looking for dynamic compilation from code, you can follow these instructions I think it not