I am using Microsoft's Unity for dependency injection and I want to do something like this: IDataContext context = _unityContainer.Resolve<IDataContext>(); var repositoryA = _unityContainer...

I have a Windows Form. It contains many controllers: Grids, buttons, and even a TreeView. Events are defined on most of them. For example, there are multiple independent events that query or comman...

Inversion of control is a value-proof technique which is used to modularize a system and decouple the components from each other. Low coupling is always an advantage: it simplifies automatic testi...

I'm using .NET Core constructor injection. In a code review from a colleague, he raised the question if I should check for null values on injected dependencies in controllers. Since the framework ...

I'm developing a Java Spring application. I have some fields in my application which are configured using a .yml config file. I would like to import those values using an @Value annotation on the f...

I have a class with lombok @RequiredArgsConstructor: @RequiredArgsConstructor @Service public class Test{ private final String str; private String str5; // more code } In non-spring boot we pro...

I have read about dependency injection. Then there comes Constructor Injection, Getter Injection Setter Injection Interface Injection How do they differ from Dependency Injection or all of the...

I am convinced to convert my Spring Java field injection [@Autowired] to constructor injection (among other reasons, to facilitate mock unit testing)... Is there a utility I can use to automatical...

I have a looked at similar questions on this board, but none of them answer my question. This sound strange, but is it possible to mock out a constructor call on the object you're mocking. Example...

I'm trying to figure out how to use Simple Injector, I've used it around the project with no problems registering simple services and their components. However, I wanted to use dependency injector...

I'm trying to use Spring to inject a SLF4J logger into a class like so: @Component public class Example { private final Logger logger; @Autowired public Example(final Logger logger) { this.l...

If I have a Spring configuration class (i.e. a class annotated with @Configuration) can I use constructor injection ? As it stands if I add one I get a no default constructor message, and if I add...

I have a base Class Base having dependecy Dep and default and Injection Constructor- Class Base : IBase { public IDep Dep { get; set; } public Base() { Console.WriteLine("Default Constructo...

According to this article, a Controller should have a constructor that gets the interface to be implemented passed in, a la: public class DuckbillsController : ApiController { IDuckbillRepository...

I have a component that dynamically loads another component using DynamicComponentLoader. However, the dynamic component needs to have a service injected. However, I'm unsure how to go about this. ...

I'm new to spring beans, so I don't get the use of ref in constructor-arg. Why not use value again like in this example here, Here is the content of TextEditor.java file: package com.tutorialspo...

I have the following class, which uses constructor injection: public class Service : IService { public Service(IRepository repository, IProvider provider) { ... } } For most methods in this cla...

I'm trying to figure out MEF's Constructor Injection attribute. I have no idea how I tell it to load the constructor's parameters. This is the property I'm trying to load [ImportMany(typeof(BUser...

When to use constructor injection in Spring? I heard that constructor injection is particularly useful when you absolutely must have an instance of the dependency class before your component...

When a view model is created you can populate the options (e.g. used in a dropdown list) into a setter property of the view model. The problem is that when that view model is later passed as a para...

Having trouble getting the value of a ConstructorArgument parameter passed to kernel.Get(). I want to use the parameter's value to determine which of two string values will be passed into the con...

I would like to be able to use ninject to inject all instances of a particular generic type into a class. For example I have a bunch of custom extractors of a format similar to: public interface ...

Problem I regularly find myself manually typing out code that looks like this: public class SomeClass { readonly ServiceA serviceA; readonly ServiceB serviceB; public SomeClass(ServiceA servi...

I'm having a problem with Spring and constructor injection. I want to create dynamically objects with a name (String) and special id (long). But when the spring.xml file is loaded an exception occu...

Suppose that my Foo class has the following: readonly IService service; public Foo(IService service) { if (service == null) throw new ArgumentNullException("service"); this.service = service...