Questions tagged [abstract-factory]
The abstract-factory tag has no usage guidance.
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Abstract Factory for methods/constructor with different arguments
I have the following classes in my system (python):
class Metric(ABC):
def compute(self): -> float
class Visualization(ABC)
def visualize(self)
class FirstMetric(Metric)
def __init__(...
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3
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312
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How to use abstract factory on interacting widgets
Context
In many GUI frameworks, it is very common that widgets are placed in a container to arrange them visually in a window. For example, in Gtkmm, a window with a label and a button (side by side) ...
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Designing a proof mechanism
DataModel contains a Proof that contains all the information of its integrity along with the method with which the Proof should be verified.
In this case I designed a JWS type of proof that can be ...
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118
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Is my analogy of an Abstract Factory valid?
After working through several tutorials and reading various responses on this site, I believe the Abstract Factory pattern would work well for a current project. I am seeking the opinions of those ...
- 231
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Overkill to apply abstract factory pattern for a single object creation?
I need to vary the object creation at (*).
public class Parser { // Problem code
public List<FileOption> methodA() {
// Does something ...
fileOptions....
3
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1
answer
630
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Cross-cutting concerns and dependency injection
I've got a web application with an architecture somewhat like a front-controller MVC design. I get HTTP requests, route them, run them through a filter layer, dispatch them to my domain classes which ...
- 175
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239
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General question on Pairing of Abstract Factory with Bridge
I am trying to get myself familiarized with the design patterns and I am reading through this line on the relationships between different patterns. I cannot get my head around this one though,
You ...
- 19
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5
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Factories and static methods
So almost every post I read about oop by purists, they keep stressing about how using static methods is anti pattern and breaks the testability of the code.
On the other hand every time I look for ...
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Can this simple Bank example be considered as a valid Abstract Factory?
For teaching purposes, I'm trying to replicate in a more faithful way from this conceptual UML (from wikipedia):
In a "so-so" real world example, in my case, families of Loans and Insurances:
So, ...
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445
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Abstract Factory: Can Client Class have an aggregation with the Factory?
After searching for some Abstract Factory examples using modern programming languages, I have some dillemas about the sensu lato of conceptual UML schema of Abstract, more specificly about the Client (...
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What's the benefits to use an abstract factory when using interfaces is already suffice?
I get the idea of the factory pattern, but I feel that it is really not necessary to use this pattern.
For example, below is some code I saw (C#) that use factory method:
public interface IAnimal
{
...
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How to get a decoupled design without injecting repositories inside entities
I am facing the following situation:
I have to develop a system that has to calculate the price of a car so i need to calculate the prices of all the Pieces that make up the car and then total them.
...
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What does related or dependent mean here?
In Elements of Reusable Object Oriented software by Erich Gamma and friends, the intent for Abstract Factory Pattern says:
Provide an interface for creating families of related or dependent objects ...
- 232
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561
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What is abstract about the Abstract Factory?
I've been always wondering why the Abstract Factory Pattern is actually called abstract? I don't understand what is abstract about it?
It somehow does not fit in the image of abstract classes that I ...
- 2,496
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Best design pattern/approach for a Factory which needs multiple types of input
I want to develop a Factory of INotifications.
public interface INotification
{
string Text { get; }
string UserId { get; }
NotificationType NotificationType { get; }
}
The problem is, ...
- 612
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461
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Abstract Factory configuration differences
is a simple abstract factory. I know abstract factory is for selecting a product family. But my question is, can we still use this pattern if ConcreteFactory1 needs to createProductC() but ...
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How to avoid the static_cast/dynamic_cast in `Abstract Factory` design pattern?
We are using Abstract Factory design pattern in our project, as the project became complex, most of the time the concrete class functionality need to separate to multiple class.
As the following code ...
- 1,047
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354
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Convenience vs Decoupling/Composition
Let's say I have a small CD burning library written in Python, with a CD class and a Burner interface + implementation classes:
# Module cd.py
class CD:
def __init__(self):
self.folders = []
...
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641
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Abstract factory design pattern
I need help with an abstract factory pattern design.I have and calculation engine which calculates for different channels like captive, captiveTemplate or Headquarter and in the future different ...
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In which way does the factory pattern decouple classes dependency?
I understand that the main code uses the factory to return an abstract pointer of the object desired, but it doesn't change the heritability of classes.
Can you explain in which context does the ...
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C# - How can I ensure a member is invoked without needing to call it and rely on the { get; }
I'm using reflection as a way of implementing a factory pattern:
Type type = GetProviderType(vendor);
ConstructorInfo constructorInfo = type.GetConstructor(new Type[] { typeof(...
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206
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How to keep IDs in sync when using Factory?
abstract class Product
{
public abstract Product createProduct();
...
}
class OneProduct extends Product
{
...
static
{
ProductFactory.instance().registerProduct("ID1", new OneProduct(...
- 1,713
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2
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Can a single Factory be used to create similar in purpose, but different in focus objects?
I am concerned about whether or not I am using FactoryMethod correctly.
Background:
I am refactoring legacy code and I have identified a pattern: there is a God Object that is created in memory,...
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Abstract Factories Nesting and DI - Is this acceptable?
I am still trying to get some experience with DI. Let me illustrate my situation and you can give me advice on whether I am using DI and Abstract Factory correctly.
I need to create IModels at ...
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Merits of DI, Abstract Factory implementation review
I'm writing a brand new system and trying to stay true to the SOLID principles, specifically Interfacing and Dependency Injection. We are sticking closely to the Microsoft stack so we are using C# ...
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Pattern to use (if any) to co-ordinate loosely coupled classes with strong interdependencies
I have a collection of cooperative classes whose behaviors are interdependent upon one another. But I wish to keep them loosely coupled, so I've created appropriate interfaces.
I want to determine an ...
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347
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Making more than one instance of factory that is supposed to be singleton
However, there are some classes that should have only one instance.
Sometimes they are factories, which you can use to create the other objects in the system.
If more than one factory exist, ...
- 1,713
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2
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342
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Is there a Factory Pattern distinct from Abstract Factory and Factory Method?
During a recent phone screen I was asked to describe the "Factory Pattern". I asked if the screener meant "Factory Method" or "Abstract Factory". He said, "No, just the Factory Pattern".
I don't know ...
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Should Uncle Bob's example be refactored to an AbstractFactory or a SimpleFactory?
In the book "Clean Code" Robert Martin makes a statement regarding the following code:
public Money calculatePay(Employee e) throws InvalidEmployeeType { switch (e.type) {
case COMMISSIONED:
...
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