Koryphe is an extensible functions library for filtering, aggregating and transforming data
based on the Java Function API. It provides:

• Context adapted functions.
• Function composition.
• Functions with multiple inputs/outputs.
• JSON serialisation.
• Library of re-usable functions.

Koryphe allows any Java 11 Function, BinaryOperator or Predicate to be adapted and applied to the values contained within a complex object such as a Tuple.

Functions (or BinaryOperators or Predicates) can be combined and applied together in a single composite function. This is particularly powerful when combined with context adapted functions, allowing composite functions to be built from a library of simple functions and applied to complex objects.

Koryphe can combine inputs and outputs into tuples, providing type-safe interfaces for functions that apply to and/or return more than one value.

Functions, including composites, can be JSON serialised, allowing them to be used across distributed applications.

Koryphe provides a number of useful Functions, BinaryOperators and Predicates for building simple applications.

Koryphe is licensed under the Apache 2.0 License and is covered by Crown Copyright.

We welcome contributions to the project. Detailed information on our ways of working can be found here. In brief:

• Sign the GCHQ Contributor Licence Agreement;
• Push your changes to a fork;
• Submit a pull request.