atyagi/specifier

A library to help implement the specification design pattern

Specifier

, _(*1)

Provides a basic set of classes to utilize the specification design pattern., _(*2)

Usage

The included tests provide common usage of the classes., _(*3)

Basic Usage

Upon creating your specification classes, simply extend the AbstractSpecification class and implement the isSatisfiedBy method., _(*4)

Any specifications that you create are flexible enough to take in any arguments in the constructor, such as repositories or services., _(*5)

In addition, an isNotSatisfiedBy method is provided to provide a logical not if needed., _(*6)

Composite Usage

When you need to chain multiple specifications on the same object, you can leverage the AbstractSpecification chain methods plus and either., _(*7)

For example:, _(*8)

(new CustomerIsPremium())
    ->either(new CustomerRegisteredBeforeLastWeek())
    ->isSatisfiedBy($customer);

or, _(*9)

(new CustomerIsPremium())
    ->plus(new CustomerRegisteredBeforeLastWeek())
    ->isSatisfiedBy($customer);