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Gson can handle collections, generic types, and nested classes (including inner classes, which cannot be done by default). When deserializing, Gson navigates the type tree of the object being deserialized, which means that it ignores extra fields present in the JSON input.
In software engineering, dependency injection is a programming technique in which an object or function receives other objects or functions that it requires, as opposed to creating them internally. Dependency injection aims to separate the concerns of constructing objects and using them, leading to loosely coupled programs.
Dependency injection is a design pattern whose core principle is to separate behavior from dependency resolution. Guice allows implementation classes to be bound programmatically to an interface , then injected into constructors, methods or fields using an @Inject annotation.
(Dependency injection is an example of the separate, specific idea of "inverting control over the implementations of dependencies" popularised by Java frameworks.) [4] Inversion of control is sometimes referred to as the "Hollywood Principle: Don't call us, we'll call you". [1]
HK2 (Hundred-Kilobyte Kernel) is a light-weight and dynamic dependency injection framework and is a part of the GlassFish Application Server. HK2 complies with JSR 330 (Dependency Injection for Java). It has useful utilities for marking classes as services and interfaces as contracts. [1] Some of the features of HK2 DI Kernel are Custom scopes
Ivy then resolves and downloads resources from an artifact repository: either a private repository or one publicly available on the Internet. To some degree, it competes with Apache Maven, which also manages dependencies. However, Maven is a complete build tool, whereas Ivy focuses purely on managing transitive dependencies.
In object-oriented design, the dependency inversion principle is a specific methodology for loosely coupled software modules.When following this principle, the conventional dependency relationships established from high-level, policy-setting modules to low-level, dependency modules are reversed, thus rendering high-level modules independent of the low-level module implementation details.
Circular dependencies can cause many unwanted effects in software programs. Most problematic from a software design point of view is the tight coupling of the mutually dependent modules which reduces or makes impossible the separate re-use of a single module.