Inheritance

Inheritance allows a programmer of an object-oriented class hierarchy to share code: any subclass inherits all methods and variables of its super class. The subclass may overwrite the inherited methods or use them unmodified.

In Jag, linear operators inherit almost all their methods from a super class SepLinearOperator. A programmer usually only implements the operator-specific parts, such as

• the constructors, which cannot be inherited,
• the apply() method, which implements the forward and adjoint operation, and
• the toString() method, which returns a Java string representation of the object.

SepLinearOperator supplies methods to image the operator or to access the operators adjoint, its gradient, its Hessian, and more.