Implementing function library [Documentation]

Programmers Reference, IFunctionLibrary Interface

To implement a function library you need to write a class that implements the IFunctionLibrary interface. The implementation of the following methods must be provided:

calculate (String, Object [], INodeHelper)
getAvailableFunctions ()
getName () / IFunctionLibrary
getRequiredFactPatterns (String, Collection)
getTypeClass (String, Collection)
hasFunction (String, int)
toSQL (String, Collection, ISQLBuilderHelper)