Creating composite functions prior to Java 8
Prior to Java 8 it was possible to affect this type of operation using a specialized library such as http://www.functionaljava.org/ or by creating a class and interface first. We will demonstrate the latter approach here.
The interface will permit two methods to be combined. To illustrate this approach, we will declare a class called Compose
. Within the class, we will declare a CompositionFunction
interface, containing a single call
method along with a compose
method. The compose
method returns an instance of the CompositionFunction
interface using two CompositionFunction
interface instances passed to it. The call
method does the actual work.
The first part of the Compose
class and the CompositionFunction ...
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