A methodology that enables a system to be modeled as a set of objects that can be controlled and manipulated in a modular manner

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Building a calculator using MVC

I've been programming in Java for about 6 months, and I thought a good and challenging test of my skills would be to build a GUI calculator. I have very recently heard about this MVC idea, and I ...
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2answers
703 views

Search and Replace in MVC

What would be a good MVC/OOP/GRASP/SOLID structure for a search/replace functionality. Methods: search/searchNext/replace/replaceAll. I'm interested only in the PHP arhitecture and how a professional ...
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2answers
175 views

Bad Practice using Auto Generated Classes for Data Access

I've seen this before but haven't found concrete reasons. When you add Entities to your EF model, EF auto generates classes for these entities. In terms of DataAccess, why is it preferred to not ...
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2answers
460 views

Object inheritance and method parameters/return types - Please check my logic

I'm preparing for a test and doing practice questions, this one in particular I am unsure I did correctly: We are given a very simple UML diagram to demonstrate inheritance: I hope this is clear, it ...
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1answer
162 views

DataMapper for a MMO game plugin to send packets

I am working on an plugin for some game-server. The information about the plugin is not really necessary. Few points you might find helpful to answer to this question: The server The server is ...
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1answer
169 views

Interface hierarchy design for separate domains

There are businesses and people. People could be liked and businesses could be commented on: class Like class Comment class Person implements iLikeTarget class Business implements iCommentTarget ...
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1answer
122 views

Should I use composition or inheritance for sharing configuration items?

I'm working on a fairly new project where I'd like to share some config items used by a JavaScript plugin. Specifically, the project is using jQuery dataTables and I want to find a good way of sharing ...
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1answer
174 views

Best OOP pattern to use for creating a commandline SQL API for a proprietary json based company datastore

We need to create a SQL commandline tool for querying a proprietary json based datastore. I'll be using java. Any suggestions on the primary OOP design pattern I should use for building this API? ...
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1answer
221 views

From a DDD perspective is a report generating service a domain service or an infrastructure service?

Let assume we have the following service whose responsibility is to generate Excel reports: class ExcelReportService{ public String generateReport(String fileFormatFilePath, ResultSet data){ ...
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1answer
92 views

Cleanest choice for symmetric operations

I have a need to do some processing from a format A to a format B and from B to A. The job in one direction is very similar to its counterpart. Both formats are represented with an interface Msg. In ...
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1answer
332 views

Emulation of MMU accessing the contents of the registers

I'm having a play around with emulating a simple old CPU. I've set the structure up, so far anyway, as follows: The device is the main and creates an instance of the CPU. The CPU then creates ...
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0answers
116 views

How to handle a memory consuming member variable

Suppose multiple objects of the same class should do something which takes a memory consuming resource. Which of the following approaches is recommended to define and use the resource by the objects? ...
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0answers
57 views

Advantages and drawbacks of different ways using Either-types

I am writing software for compiling programs. Therefore have a Compiler that compiles a given sourcecode. It then returns a CompileResult that is similiar to an Either type (it is actually internally ...
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0answers
110 views

The inheritance argument of zope.interface (providedby vs isinstance)

What limitations does inheritance of an interface through an abstract base class present that are addressed by zope.interface? In the following talk given in 2010 by Jeff Rush about interfaces, at ...
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0answers
148 views

ActiveX, OLE, COM explanation or informative links

I've been programming a lot with C# on Visual Studio and many minor/other languages, but I'm having a really hard time to get the grasp of ActiveX, OLE, COM interfaces. All I got is that they're like ...
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0answers
53 views

Extend, wrap, or both to add generics to a class that should have had them?

So I'm using a C# framework that has a great example of where generics would be useful, except they weren't used. For simplicity's sake, we will say it was a list (I know C# has its own list), but ...
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0answers
104 views

JS closures - Passing a function to a child, how should the shared object be accessed

I have a design and am wondering what the appropriate way to access variables is. I'll demonstrate with this example since I can't seem to describe it better than the title. Term is an object ...
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0answers
63 views

Dealing with class optional dependencies

I am wondering how are you guys handling an optional class properties. Let's say I have a product that can bud doesn't have to have a color property. Is that really the best way of doing that? Should ...
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0answers
91 views

Do serialization functions belong in a model or a controller?

I'm developing an application where: Models keep data as a multi-dimensional array, which are saved as-is to a MongoDB database. The model is used to provide methods to manipulate the data, and ...
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0answers
92 views

Is this considered an implementation of the Template Method design pattern?

Please consider a StringBank class. This class holds a list of Strings and can return them to the client. It's code (irrelevant stuff omitted): abstract class StringBank{ List<String> ...
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71 views

Dealing with several custom getters

I have a data structure with data units containing different types of data. I've wrapped the data in "Field" objects so that each field is able to independently parse user input in a desired way. ...
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29 views

Adding new Interface & Replacing Method with Interface Type

Let's say that I have 2 classes: Foo and Bar. `Foo` { List<Bar> bars String bippy() int boop() } `Bar` { int biz() String baz() } Observe that Foo's fields include a List<Bar>. ...
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163 views

Evaluating local storage for data persistence for small, stand-alone applications

TL;DR - I have a standalone application that will remain relatively small. I'm trying to evaluate between using XML files or a lightweight database for local storage of data that needs to be ...
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84 views

The finer points of HMVC

I'm new to HMVC and whilst tutorials are great about dealing with the overall details of keeping modules separate and only letting controllers communicate, they aren't so great at explaining the ...
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26 views

How to deal with multiple output modes of multiple types?

Note: The business domain being a bit complicated to explain, I replaced the names of actual classes by more illustrative examples. I'm writing an application in which the business layer returns a ...
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64 views

Why use subtyped functions?

Say you have arguments A1 >: A2 (contra-variant), and return types B1 <: B2 (covariant). The corresponding functions are such that: A1 => B1 <: A2 => B2 Sometimes, this makes sense to me - ...
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Modelling network and persistent entity representations

I have an app where I need to synchronize some entities (simply download latest versions of entities from server to client). Entity has bunch of text properties and bunch of resource links (referenced ...
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29 views

Class/Object with different sets of configurations, singletons etc (PHP)

I want to produce maintainable code for configuring one or multiple classes differently depending whether in a production or development environment. For example, making a Paypal class/object that ...
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507 views

How to design socks proxy server (OOP)

I'm working on a socks server application written in C#. But I don't really know how to design this in a nice way. I got this for Socks V4 and V4A: I'm not sure if it clears things up, but I think ...
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128 views

OO design for client-server/RPC/n-tier data transfer (specifically SignalR)

I'm using SignalR to implement a client/server system, but I guess this question could apply to other tiered/client-server/RPC systems. If you aren't familiar with SignalR, you basically create a ...
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65 views

using internal or external iterators over graph edges

I've written some code to manipulate sparse graphs for school work I'm doing, and I have an operation which requires me to loop over all the edges of a graph. The interface I need to implement is some ...