Object-oriented design is the process of planning a system of interacting objects for the purpose of solving a software problem.

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Multiple instance of the same class?

I have a class named "Category" to handle all the operations and data about my categories. Now, my class is created however I need to find a way to build an object for each of the categories in my ...
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2answers
143 views

two repositories with kind of different behavior serving same object

I have a simple object like this public class Book { public List Chapters { get; private set; } public TableOfContent BookTOC { get; set; } public string Identifier { ...
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1answer
88 views

Message Mapper Design Considerations

Long question context, skip to tl;dr for the meat of it. I am designing an integration between two web applications, and have come to the conclusion that a message pattern would be an appropriate ...
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1answer
258 views

How should one model an ExchangeService object (in ews-java-api) for sharing MS Exchange connections?

I am creating an application which uses ews-java-api to connect to an MS Exchange server. Once the connection is authenticated, the api dictates use of ExchangeService object for searching mailboxes, ...
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1answer
40 views

What kind of data structure should be used to store components in an electrical schematic program?

Is there a specific data structure, object oriented programming methodology, and/or approach for achieving what programs like LT Spice, Altium Designer, and Cadence Virtuoso use to manage ...
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1answer
64 views

How to use link tables in backend code?

This is more of an open ended question regarding design best practice. Say I have two classes; one is a Vehicle, and the other is an InformationSource (for maintenance/repair information). An ...
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1answer
93 views

How to store state data when the data is related to another entity?

In order to increase the parallel-ability of my objects, I try to make them read-only and include only data that naturally belong to the entity. I have class Object { ... }; class Processor { ...
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1answer
358 views

How to better isolate JOGL or LWJGL3 dependency from game clients?

I'm currently working on a project to develop a relatively small framework with the goal of supporting game development efforts for students in a course. The scope of this project is an OpenGL-based ...
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1answer
209 views

Creating Set Subclasses or Allowing Outside Configuration

I have a TriggerCaller and a TriggerAction class. The Caller "calls" the do() method on the action, which is set with the TriggerCallers setAction() method. The rest of the program should deal with ...
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1answer
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Is there an official name for the “one object disease” anti-pattern (iterative single object operations on databases, services etc.)?

It is caused by the naive programming paradigm: focus on just a single object, do something with it, and if you have to work with many objects, you loop, iterate and traverse, repeating the operation ...
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1answer
131 views

Design suggestion required to create an Export plugin

I am trying to create Export Module for our application, this seems to me a bit complex so I am posting it here to get some guide lines. In our database we have a list of Products, which can be ...
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1answer
273 views

Base Class, with method that returns Derived Class. design flaw?

I'm writing a Math equation solver in python (for fun). The first design that came to my mind: Expression: base class for every item in an equation (maybe bad name). BinaryExpression extends ...
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116 views

Finite state machine menu design

I'm creating a FSM in python (it's a step sequencer and sample pad based on a Raspberry Pi 2). Right now there are two states and the third is the Menu. This is handled by a class System which ...
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0answers
84 views

Updating an entity via a service layer

What's the best way to update an entity using a service layer? Performing a single, atomic action I can understand like BlogService.Publish(blogID) but what about editing multiple values which map to ...
2
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0answers
63 views

What are the benefits of an input/output component design?

For the company I work at, all of our projects, including a new one started last year, are written in C89. We write for vxWorks (a real time embedded operation system). Our software runs ...
2
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0answers
46 views

Mocking third party web service

I am working on a project to create a wrapper library which will be used to interact with a web service provided by the client's IT team. The reason for this library is that we interact with this ...
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0answers
75 views

Confused about how to 'design' my (leaflet.js) map application; OOP

I asked another question recently regarding constructors calling constructors in order to organise my code properly but the answers really ended up giving me more questions than answers (which is good ...
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0answers
398 views

Assembler vs Entity Translator and Entities vs DTO

I was hoping that someone could explain the exact difference between an Assembler and Entity Translator. Martin Fowler describes the Assembler as a sort of Mapper(?) which converts DTOs into Domain ...
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0answers
67 views

Sharing POJO between different handlers

I am trying to automate Business Process which can be characterized as a pipeline with distinct stages. Pipeline can be perceived as A->B->C, where A,B,C are distinct Business Steps that ...
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0answers
71 views

How to authentication user in REST API (domain driven design)

I am using REST API as a presentation layer of a DDD project. In order to secure API calls I am using token based security. ...
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0answers
55 views

Storing reference to a model obtained using DataMapper to be able to call save on it

When using the DataMapper pattern, which involves modeling classes containing business logic and knowing absolutely nothing about persistence, caching,... I usually want the models to represent ...
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0answers
40 views

Proper program design for submitting a form

I have been stuck wondering what the best solution to the problem below: I am developing a form like GUI with quite a few places for input. Currently, I am storing each UI element in an ArrayList ...
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0answers
354 views

How should Object Model wrapper classes behave when underlying objects are deleted?

I'm currently building an object model library for use in a project. It wraps our internal concepts - Servers, Folders, Items - in an object hierarchy (IFolder, IItem, etc), and we have several ...
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119 views

DAO Design with Child Objects

If I have objects that represent a hierarchy of relationships. For example: Person   Spouse     Spouse Contact     Spouse Address ...
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21 views

How to design MVC in JavaFX with respect to performance of the non-gui task

I'm working on a huge application and we got some serious troubles regarding the performance of the software. I don't want to bother you with too many details, so in short: in one JVM runs the GUI ...
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42 views

How to save the differences between objects which are the result of random changes?

I keep a state object of the following form: class State { int num1, num2; List<String> strings; MyObject myObject; // A class I wrote // etc. } The state changes many times ...
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53 views

Test Utility in Spring: Singleton or Static

I'm working on Test Utility in a spring project, this utility contains a methods to convert an object to JSON object and vice versa..etc and I'm confused if it's better to make the methods as ...
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0answers
38 views

Graphing Objects without invoking Domain Logic

I'm unsure of how to go about implementing a certain aspect of my objects. Given a model class that represents an object, with business functionality based on various events, how can we graph the ...
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0answers
105 views

Option<T> functional type implementation and scenarios

Have you ever being implementing Option<T> functional type? It is discussed here: https://app.pluralsight.com/library/courses/tactical-design-patterns-dot-net-control-flow/table-of-contents ...
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99 views

Generic Type Parameters where one is itself Generic with a Type Parameter of the Other

I have a couple of classes with the following pattern that I am uncomfortable with. Is this the only way to do this, or are their other design patterns that would be more reliable. public class ...
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0answers
118 views

EF “Code First” and Object/Relational Impedance

I'm trying to learn more about the current orthodoxy with respect to ASP.NET MVC application design, and I stumbled upon something that confuses me, relating to the choice among database design ...
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133 views

How do I model this Shipping Routes scenario?

Trying to begin coding this solution. I have a scenario as follows below: A shipping operator has a network of routes to various ports, the routes are specified explicitly below Buenos ...
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0answers
106 views

Class design for an app that reads data from Active Directory

I am hoping someone can help me regarding design and architecture for an application. The application is basically a service written in C#. The purpose of this service is mainly to read data from ...
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248 views

What is a good way to structure my UI classes?

So, I have a program which has a swing GUI. (Java - duh!) I really, really don't think the way I'm structuring my classes now is good, so I am reorganizing from the ground up to follow best practices. ...
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111 views

Reporting Logic vs Domain Logic

Should the reporting logic to extract domain data in a certain format reside in domain objects or separate reporting objects? The reporting logic needs to: select entities/data which match selection ...