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Frameworks

A software cframework is an abstraction in which common code providing generic functionality can be selectively overridden or specialized by user code providing specific functionality. Frameworks are a special case of software libraries in that they are reusable abstractions of code wrapped in a well-defined Application programming interface (API), yet they contain some key distinguishing features that separate them from normal libraries.

Software frameworks have these distinguishing features that separate them from libraries or normal user applications:

1. inversion of control – In a framework, unlike in libraries or normal user applications, the overall program’s flow of control is not dictated by the caller, but by the framework.

2.  default behavior – A framework has a default behavior. This default behavior must actually be some useful behavior and not a series of no-ops.

3.  extensibility – A framework can be extended by the user usually by selective overriding or specialized by user code providing specific functionality.

4.  non-modifiable framework code – The framework code, in general, is not allowed to be modified. Users can extend the framework, but not modify its code.

The designers of software frameworks aim to facilitate software development by allowing designers and programmers to devote their time to meeting software requirements rather than dealing with the more standard low-level details of providing a working system, thereby reducing overall development time.

 

Application Frameworks

An application framework or application development framework consists of a software framework used by software developers to implement the standard structure of an application for a specific development environment (such as an operating system or a web application).

Application frameworks became popular with the rise of graphical user interfaces (GUIs), since these tended to promote a standard structure for applications. Programmers find it much simpler to create automatic GUI creation tools when using a standard framework, since this defines the underlying code structure of the application in advance.

Developers usually use object-oriented programming techniques to implement frameworks such that the unique parts of an application can simply inherit from pre-existing classes in the framework.