factory-pattern Questions

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Consider the following simple factory example: public class MyFactory : IMyFactory { public MyObject CreateObject() { return new MyObject(); } } In this example, MyObject implements the IDis...
Quarta asked 18/12, 2014 at 6:16

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I am using ASP.NET Core, I know that such Logging mechanism is already provided by the framework, but using this to illustrate my problem. I am using kind of Factory pattern to build the Logger cl...

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I have 1 interface: public interface ISummary { int EventId {get; set;} } And many concrete classes that implement this interface: public class EmployeeSummary : ISummary { public int EventId...
Sankaran asked 21/9, 2016 at 15:31

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Suppose I write some plotting program. This program depends on a module that can draw graphics primitives. But that graphics module could be anything that supports the used operations. It could be ...
Darondarooge asked 30/7, 2016 at 7:34

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This is related to creating and destroying objects from the book 'Effective Java' by Joshua Bloch Item 1: Consider static factory methods instead of constructors This method translates a boolean ...
Garrulous asked 25/7, 2016 at 7:16

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I have this wcf method Profile GetProfileInfo(string profileType, string profileName) and a business rule: if profileType is "A" read from database. if profileType is "B" read from xml file. ...
Eternity asked 30/1, 2010 at 17:26

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I am trying to figure out how to write a generic factory in XE2. Lets say I have this: type TObjectTypes = (otLogger, otEmail); type TLoggerTypes = (lFile, lConsole, lDatabase); type TEmailTy...
Adp asked 20/3, 2016 at 7:16

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I have a factory method which returns implementation of an interface. The thing is - implementations have different constructor parameters. My question is - how to pass parameters through factory ...
Arliearliene asked 11/1, 2016 at 16:26

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I am reading Hodges book "More Coding in Delphi", section on Factory Pattern. Trying to learn stuff. Broke down my code into small unit. I use ReportMemoryLeaksOnShutDown := True; and fallowing cod...
Grafting asked 9/1, 2016 at 13:33

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Maybe this is a simple question, because I'm still new to C++. I would like to use some kind of factory to encapsulate the logging in my application. The idea is that only the factory knews which c...
Refluent asked 21/12, 2015 at 13:59

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Imagine I have a big CLI application with many different commands (think, for example image-magick). I wanted to organize this application into modules and etc. So, there would be a master click....

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I'm looking for a simple example of how to implement a factory class, but without the use of a Switch or an If-Then statement. All the examples I can find use one. For example, how could one modify...
Fania asked 23/11, 2015 at 18:40

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I'm trying to create a bot for Telegram messenger while trying to learn OOP. I'm really lost on how to approach the problem. I have a Message entity, with all the getters and setters, this I think ...
Forfend asked 16/11, 2015 at 15:43

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I have implemented a factory in my project and it was recently suggested that I use attributes on my classes so the factory can determine which class to instantiate and pass back. I am new to the w...
Wristwatch asked 8/12, 2010 at 12:47

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I am familiar with these patterns but still don't know how to handle following situation: public class CarFactory { public CarFactory(Dep1,Dep2,Dep3,Dep4,Dep5,Dep6) { } public ICar CreateCar(...

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In my application a few layers. In this topic will focus on Domain and Infrastructure layers. I have repository interface ClientRepositoryInterface in Domain layer. And I have implementation of th...

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This pattern uses an abstract factory, and then an implementation of the factory. I am sure there is a standard naming convention for these two classes, but I don't know what it is. For example: ...
Spreader asked 7/7, 2015 at 8:5

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I have a factory object ChallengeManager to generate instances of a Challenge object for a game I'm building. There are many challenges. The constructors for each Challenge class derivation are dif...
Decibel asked 27/4, 2015 at 23:5

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I understand that one of the main advantages of the Factory Method over Simple Factory is that it doesn't violate the Open-Closed SOLID Principle. That is, the former doesn't require modifying the ...

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I have an abstract class template <class T> struct A { /* virtual methods */ }; and several concrete derived classes with various constructors // The constructor of B takes 1 input templa...
Cahoon asked 31/1, 2015 at 21:8

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After ~10 months of procedural PHP, I'm now trying to wrap my head around basic OOP principles and design patterns. This is a hobby, and I haven't nearly as much time as I'd like to pursue it, so p...
Demineralize asked 18/1, 2011 at 1:58

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I have used the standard factory pattern method before to create instances of classes (implementing a specific interface) using a Factory class, which has a "create" method, that returns the right ...
Chilopod asked 10/1, 2015 at 0:47

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I just read Factory Method. I understand that it provides a way to delegate the instantiation to sub-classes. But I couldn't understand the possible uses in a real-world scenario. Can anyone give ...
Scrivener asked 5/3, 2010 at 10:51

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I have read the factory design pattern recently, in that he had mentioned one of the problem in normal approach is *Need to use the new keyword in client classes. So by using factory we have ach...
Overtop asked 22/12, 2014 at 7:24

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Should a factory be responsible for finding models as well as creating them? for example: If i had a product model, should its factory have methods such as: $product = $productFactory->findBy...
Cutthroat asked 7/12, 2014 at 23:30

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