Class: DecisionAgent::Dmn::Feel::Functions::Base

Inherits:

Object

• Object
• DecisionAgent::Dmn::Feel::Functions::Base

Defined in:

lib/decision_agent/dmn/feel/functions.rb

Overview

Base class for all functions

Direct Known Subclasses

Abs, All, Any, Append, Ceiling, Contains, Count, DateFunction, DistinctValues, DurationFunction, EndsWith, Even, Floor, IndexOf, LowerCase, Max, Mean, Min, Modulo, Not, Odd, Replace, Reverse, Round, Sqrt, StartsWith, StringLength, Substring, SubstringAfter, SubstringBefore, Sum, TimeFunction, UpperCase

Class Method Summary

• .call(args, context = {}) ⇒ Object

  Execute function with arguments and context Returns either a value or a ConditionEvaluator condition structure.

• .register(*names) ⇒ Object

  Register function with one or more names.

• .validate_arg_count(args, expected) ⇒ Object

  Validate argument count.

Class Method Details

.call(args, context = {}) ⇒ Object

Execute function with arguments and context Returns either a value or a ConditionEvaluator condition structure

Raises:

• (NotImplementedError)

# File 'lib/decision_agent/dmn/feel/functions.rb', line 27

def call(args, context = {})
  raise NotImplementedError, "Subclasses must implement call"
end

.register(*names) ⇒ Object

Register function with one or more names

# File 'lib/decision_agent/dmn/feel/functions.rb', line 21

def register(*names)
  names.each { |name| REGISTRY[name.to_s] = self }
end

.validate_arg_count(args, expected) ⇒ Object

Validate argument count

Raises:

• (FeelFunctionError)

# File 'lib/decision_agent/dmn/feel/functions.rb', line 32

def validate_arg_count(args, expected)
  actual = args.length
  valid = if expected.is_a?(Range)
            expected.cover?(actual)
          else
            actual == expected
          end

  return if valid

  raise FeelFunctionError, "Wrong number of arguments for #{name} (got #{actual}, expected #{expected})"
end