delegation

I need to create a base class that implements several interfaces with lots of methods, example below. Is there an easier way to delegate these method calls without having to create a horde of duplicate methods? public class MultipleInterfaces implements InterFaceOne, InterFaceTwo { private InterFaceOne if1; private InterFaceTwo if2; public MultipleInterfaces() { if1 = new ImplementingClassOne(); if2 = new ImplementingClassTwo(); } @Override public void classOneMethodOne { if1.methodOne(); } @Override public void classOneMethodTwo { if1.methodTwo(); } /** Etc. */ @Override public void

I am facing a continuing problem distinguishing delegation, composition and aggregation from each other, and identifying the cases where it's the best to use one over the other. I have consulted a Java OO Analysis and Design book, but my confusion still remains. The main explanation is this: Delegation : When my object uses another object's functionality as is without changing it. Composition : My object consists of other objects which in turn cannot exist after my object is destroyed-garbage collected. Aggregation : My object consists of other objects which can live even after my object is

I'm using the LogonUser win32 api: token = LogonUser(...) WindowsIdentity newId = new WindowsIdentity(token); WindowsImpersonationContext impersonatedUser = newId.Impersonate(); However when calling a WCF service after this I'm not able to use the impersonated identity. I think this is because impersonatedUser.ImpersonationLevel equals Impersonation. Is this the reason? Is a level of ImpersonationLevel.Identification what I need? How to get such a level? I don't know if this will work for WCF. But we use it in our production web app for impersonation to read and write files to the file system.

I have a Java web application which do SPNEGO authentication of clients in a Windows Active Directory environment. To authenticate the user we use code from the good old SPNEGO SourceForge project. String encodedAuthToken = (String) credentials; LOG.debug("Encoded auth token: " + encodedAuthToken); byte[] authToken = B64Code.decode(encodedAuthToken); GSSManager manager = GSSManager.getInstance(); try { Oid krb5Oid = new Oid("1.3.6.1.5.5.2"); GSSName gssName = manager.createName(_targetName, null); GSSCredential serverCreds = manager.createCredential(gssName, GSSCredential.INDEFINITE_LIFETIME,

I need to access a network resource on which only a given Domain Account has access. I am using the LogonUser call, but get a "User does not have required priviliege" exception, as the web application is running with the asp.net account and it does not have adequate permissions to make this call. Is there a way to get around it? Changing the identity or permissions of the ASP.Net account is not an option as this is a production machine with many projects running. Is there a better way to achieve this? Using Asp.Net 2.0, Forms Authentication. Kind Regards. Just calling LogonUser is not enough.

I was looking through the source to SensorManager in Android and found that when you register a SensorEventListener the SensorManager passes control of the listener to a ListenerDelegate . I only bring this up as an example. I read the Wikipedia article on delegate programming but I am still not sure of its purpose. Why would one use a 'delegate'? How does it help the control flow of a program? What are the disadvantages of using (or not) one? Is it most practical for use with listeners? Edit: ListenerDelegate is on line 487 and the methods in question are around line 1054. Bozho Delegation is

Could someone please explain when would I want to use delegation instead of inheritance? When you want to "copy"/Expose the base class' API, you use inheritance. When you only want to "copy" functionality, use delegation. One example of this: You want to create a Stack out of a List. Stack only has pop, push and peek. You shouldn't use inheritance given that you don't want push_back, push_front, removeAt, et al.-kind of functionality in a Stack. They have nothing to do with each other. Delegation is a behavior. Inheritance is a model technique. Inheritance is for modeling "is-a". A computer

Is it possible to use my personal website/blog to login to sites that use openid , and delegating to my Google account? OK, I searched this question on SO but no good answer. After spent some time I figured out how to do it. I'm going to answer this myself as a way to share it. tjrobinson Now it is possible delegate OpenID to your Google account (not Google Apps) . No, this is not using the demo OpenID provider using App Engine. This is your REAL Google account! First you need to enable your Google Profiles . Try to view your profile and edit it, there should be an option to set your Profile

From Apple's own website: "At the heart of Swift's design are two incredibly powerful ideas: protocol-oriented programming and first class value semantics." Can someone please elaborate what exactly is protocol oriented programming, and what added value does it bring? I have read this and watched the Protocol-Oriented Programming in Swift video , but coming from an Objective-C background still haven't understood it. I kindly ask for a very plain English answer along with code snippets & technical details about how it's different from Objective-C. Just one of the confusions I have is using