Class: DMN::Rule

Inherits:
Object
  • Object
show all
Defined in:
lib/dmn/rule.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(id:, input_entries:, output_entries:, description: nil) ⇒ Rule

Returns a new instance of Rule.



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# File 'lib/dmn/rule.rb', line 13

def initialize(id:, input_entries:, output_entries:, description: nil)
  @id = id
  @input_entries = input_entries
  @output_entries = output_entries
  @description = description
end

Instance Attribute Details

#description ⇒ Object

Returns the value of attribute description.



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# File 'lib/dmn/rule.rb', line 5

def description
  @description
end

#id ⇒ Object

Returns the value of attribute id.



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# File 'lib/dmn/rule.rb', line 5

def id
  @id
end

#input_entries ⇒ Object

Returns the value of attribute input_entries.



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# File 'lib/dmn/rule.rb', line 5

def input_entries
  @input_entries
end

#output_entries ⇒ Object

Returns the value of attribute output_entries.



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# File 'lib/dmn/rule.rb', line 5

def output_entries
  @output_entries
end

Class Method Details

.from_json(json) ⇒ Object 



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# File 'lib/dmn/rule.rb', line 7

def self.from_json(json)
  input_entries = Array.wrap(json[:input_entry]).map { |input_entry| FEEL::UnaryTests.from_json(input_entry) }
  output_entries = Array.wrap(json[:output_entry]).map { |output_entry| FEEL::LiteralExpression.from_json(output_entry) }
  Rule.new(id: json[:id], input_entries: input_entries, output_entries: output_entries, description: json[:description])
end

Instance Method Details

#as_json ⇒ Object 



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# File 'lib/dmn/rule.rb', line 28

def as_json
  {
    id: id,
    input_entries: input_entries.map(&:as_json),
    output_entries: output_entries.map(&:as_json),
    description: description,
  }
end

#evaluate(input_values = [], variables = {}) ⇒ Object 



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# File 'lib/dmn/rule.rb', line 20

def evaluate(input_values = [], variables = {})
  [].tap do |test_results|
    input_entries.each_with_index do |input_entry, index|
      test_results.push input_entry.test(input_values[index], variables)
    end
  end
end

#output_value(outputs, variables) ⇒ Object 



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# File 'lib/dmn/rule.rb', line 37

def output_value(outputs, variables)
  HashWithIndifferentAccess.new.tap do |ov|
    output_entries.each_with_index do |output_entry, index|
      if output_entry.valid?
        val = output_entry.evaluate(variables)
        nested_hash_value(ov, outputs[index].name, val)
      end
    end
  end
end