Questions tagged [encapsulation]
Encapsulation is the principle of bundling software elements in a way to hide implementation details and to expose only a known interface.
211 questions
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Design pattern for exposing different parts of interface to different entities
In a certain program I would like to have three objects, say, a, b, and c, with c being a shared private member (sub-object) of a and b. The data between the three objects shall only go this way:
a &...
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Bypass the need for a service layer with SQL Server views (for Read Only)
A service interface allows a service layer to support backwards compatibility. As long as the different versions of the API are still supported, then changes can be added to the newer versions of the ...
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Confused on how abstraction and encapsulation is helpful
Using assimp I've created a function to load 3D models and it does everything I need and I don't plan to use another library or write something custom, however, I am curious how techniques such as ...
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How might encapsulated source be broken into into multiple files?
I have a project where there is a primary, high-level, opaque struct with many functions that operate on it. Maybe I am simulating a CPU.
How might the corresponding source code be organized?
One way ...
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Handling parents events from child component, in a props down events up approach
This question is language/framework agnostic. EDIT: The comments and answers have highlighted how different languages approach events differently, which made me realize this question isn't really ...
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How encapsulating what varies can help us?
I have a question about encapsulation and I read these two topic (this & this) but I got more confused.
I've been reading Head First Object-Oriented Analysis and Design book and I'm trying to ...
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MVVM: How and should I expose view models' models to other view models?
Many times while writing MVVM apps in C# I've come across this sort of problem where I need to expose the model in a view model so that I can get it in another view model and do something with it.
...
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Is it okay to have misleading struct and function names for the sake of encapsulation?
I'm writing this library in which the user can provide custom code defining the algorithm used for finding an optimal solution. In the papers that I have read, the targeted user thinks in terms of ...
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Where to determine different behaviour for a child class with feature flags
Let's say that I have a Parent class and a Child class, Parent relies on Child to perform, say, some network request:
class Parent {
...
public init(){
const child = new Child();
const ...
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How is my class breaking encapsulation?
I was submitting this code in Java to an AI tool that checks for OOPS modeling and it says that this class is breaking encapsulation, although it did not gave any reason why.
The objective is to store ...
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Lambdas vs scope blocks for encapsulation in c++
When working with functions that run a few short "procedures" in sequence that are not used anywhere else and it makes sense to keep it all inline, in a single function, a large part of the ...
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If encapsulation and abstraction is so important, why do we care about how things work "under the hood"
As I am learning OOP principles, I know that it is always good practice to hide the inner workings of classes so that the end user can't access or break them. I understand why this is important. The ...
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Recommended way of hiding implementation details?
I have a single *.h file. This file contains a single (more to come) function declaration.
Now the implementation of that file is very complex.
the corresponding *.cpp contains several function ...
user315117
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answers
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Add specific behavior inside classes
I'm learning to make games with OOP and there's something I don't understand. What I can see is that the more I add methods to a class, the less it becomes reusable and flexible. For example, if we ...
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How far can one debug a low-level API in closed-source environments?
Assume a low-level API is provided without source code (e.g. DirectX).
The API provides a virtualization of hardware resources (GPU, CPU, audio card, etc.), which enables the user to call hardware-...
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Are there any legitimate use cases for protected visibility?
Protected visibility in languages like C++, Java or PHP is a strange beast: it makes fields and methods accessible in subclasses, but not in code completely outside the class.
It strikes me as ...
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How do you achieve encapsulation while "separating view and business logic"?
I've been trying to get a better understanding of OOP (I'm not the biggest fan of it, but I still want to understand it).
One of the core principles of OOP is encapsulation - you're supposed to ...
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Is this dependency propogation an anti-pattern, and how do I remove it?
Module A contains a gap buffer for manipulating text and some associated methods. Relevant to this question is the dependency on a Module B, used for syntax highlighting of text.
Module A also ...
user361757
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How to test functionality that requires a certain internal state?
I'm struggling to test functionality in a class where the class has to be in a certain state for the functionality to work, but the class cannot be put directly into a given state by design, to ...
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Restructuring a “processing slip” like object used in many steps
I have worked on a library which processed data through multiple steps. It was written in R, a dynamic programming language where one could just add fields to existing “objects”, which were just ...
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Guidelines for using extensions in Swift
The other day, I came across this question on StackOverflow. In short, the user who asked the question wanted to extend a class from a third-party library to implement the Codable protocol, but ...
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What design pattern / class / interface should I use for encapsulating a program? [closed]
I am building a chess - related application, and I want to use a pre-compiled program called Stockfish as my chess engine. I am wondering what is the best practice to encapsulate the usage of the ...
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Where to put files (interfaces) that link two independent assemblies: Authentication and Main Program
I'm having an issue with dependencies in a C# app that I'm creating.
I have an assembly for my authentication process, and a separate assembly for starting up the main program once authentication is ...
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Does encapsulation in OOP happen at run time or compile time?
Encapsulation is the hiding of an implementation in OOP the way I understand it. I searched on Google and I was thinking of trying to write a program to test, but my tests would only happen at run ...
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How name public method that relays to abstract methods of its children (c#)
I've run into the following situation multiple times, and in every case have struggled with the naming.
I want a class to force its children to implement a method, but I want the parent class to be ...
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How to separate public and private headers when internal data structures are private?
When developing a shared library in C, it is common to separate the "public" headers from the "private" headers. The public headers contain all the functions and types that are ...
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How does one choose where to place logic which converts data between two formats/representations?
Suppose I have two "modules", A, and B (I'm choosing not to use classes, because you generally can't create an instance of a module, which makes this question simpler). These modules contain ...
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Could a getState() method in a Caretaker violates Memento Pattern?
I have looked at several examples for implementations of Momento on the web. I wonder if it is correct to retrieve the status of Originator, since this is much more accurate, up-to-date and reliable?
...
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Are multiple dynamic dispatch methods possible?
C++ only supports single dynamic dispatch methods. Indeed, the following program:
#include <iostream>
struct Shape {
virtual void overlap(Shape* y) { std::cout << "Shape, Shape\n&...
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Encapsulation violation
I was going through a question and here the answer says that Encapsulation is being violated
class car
{
int speed;
public : int* getSpeed()
{
return &speed;
}
};
int ...
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Use debug-functionality without breaking architecture
note: This is of couse about software-architecture/design-principles, but as no architecture is completely detached from its language, please note that the language i am using is C++.
I am using an ...
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Modular programming with C: Separate device logic from communication protocol logic
I have no experience with C (only C++ and higher level languages). Right now I have tried and failed to find general guidelines on how to write good C code in a way that allows to separate the ...
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Should I use a class with only static members to encapsulate my program?
So I'm writing a network simulator in C++ as part of a university project. Right now, I have a class structure that looks something like:
//includes type aliases
#include "GlobalTypes.h"
//main body ...
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Pros and cons of different implementations wrt encapsulation
I have an application. It needs to send emails. We've all been there, done that, got the t-shirt.
I've got an IEmailMessage interface:
public interface IEmailMessage
{
string From { get; }
...
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State Machine: what object is responsible for state transfer?
I would like to create a state machine.
Each State would have its run method, and, according to some logic would then set a next state.
Option 1:
If each state is responsible for determining a next ...
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Open closed principle: code duplication and encapsulation
In another question on this site, asking to clarify the open closed principle, @Kate Gregory answered this.
I'm interested in this part specifically:
Imagine you wrote an Invoice class that works ...
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Splitting class responsibilities without exposing private data
I'm struggling to find good ways to split up classes without exposing private data. Most articles I read about SRP seem to ignore how the new classes that take on the separated responsibilities access ...
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Do you need to think about encapsulation if you can ensure immutability?
Encapsulation
In object-oriented programming (OOP), encapsulation refers to the
bundling of data with the methods that operate on that data, or the
restricting of direct access to some of an ...
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How does encapsulation actually work?
I made the following diagram to show a typical separation of concerns as typically taught -
Here ClassA indirectly uses ClassB via the ISomeInterface, of course ensuring it doesn't know ClassB exists, ...
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Separating data and behavior in Java
I am in the process of refining my code to adhere more to my current understanding of the Single Responsibility Principle (SRP). Originally, I had a class called Animal that had a set of methods and ...
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Is there anything wrong with writing getter/setter methods in C#? [duplicate]
I am a Java dev for almost all of my programming (at least in the workplace) but I do some Unity for fun on the side. I have used C# properties many times and they are convenient to still provide ...
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Clean Code: Avoiding "Order Matters" without passing member variables to private methods?
I am trying to implement some of the principles laid out in Clean Code by Robert C. Martin.
I had a class that was heavily suffering from the ordering problem. I have solved most of this by ...
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Can renaming a method preserve encapsulation?
I was reading this page, about when getters/setters are justified, and the OP gave the following code sample:
class Fridge
{
int cheese;
void set_cheese(int _cheese) { cheese = _cheese; }
...
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C# Static & Constructor Logic [closed]
I learn C# and try to understand the logic between static and Constructor right now. One thing I need ask you about an example which I will give at below. (please ignore the quality of code or how ...
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Sharing #define's between higher and lower layer. Where should shared types go? [closed]
Let's say I have a stacked 2 layer app (High Layer (HL) and Low Layer (LL)) that is implemented in C.
HL defines a few #defines.
HL calls a LL function with a parameter that takes values of the #...
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Can encapsulation/information hiding cause problems in error identifying/locating?
I understand the principles behind opaque data types, encapsulation, information hiding, etc. in theory: preventing alteration to parts of a program can prevent people from accidentally messing it up, ...
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methods that has only behavior and not manage class state, is that violation of encapsulation
This is a simple scenario in an office with employees and their manager.
In this scenario, both managers and employees have a name attribute.
Only the manager can change his own name
Only the ...
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What's the purpose of explicit encapsulation?
Assume you have a library in which every function is public. Sooner or later developers who use your library will come up with a stable pattern of usage. In that terms external information of how ...
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Should a class provide public mutators for all its private fields?
I work on refactoring an Java application based on a CAST audit. One of the criterion says that
To respect OO encapsulation concepts, private fields should always be
accessed through accessors
So ...
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The ID of an object is null at start. Does that make the object state invalid and violate encapsulation?
This question is related to How should an `Employee` class be designed?
In the above question, to uniquely identify an employee, each Employee object has an id field as shown below
class Employee
{
...
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