Class: OCRunner::ParseMachine

Inherits:
Object
  • Object
show all
Includes:
Oniguruma
Defined in:
lib/ocrunner/parse_machine.rb

Direct Known Subclasses

OutputProcessor

Class Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Class Attribute Details

.events ⇒ Object

Returns the value of attribute events.



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# File 'lib/ocrunner/parse_machine.rb', line 9

def events
  @events
end

.states ⇒ Object

Returns the value of attribute states.



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# File 'lib/ocrunner/parse_machine.rb', line 9

def states
  @states
end

Class Method Details

.default_state(default_state) ⇒ Object 



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# File 'lib/ocrunner/parse_machine.rb', line 29

def default_state(default_state)
  @states ||= {}
  @states[default_state] ||= {}
  @states[default_state][:default] = true
end

.event(name, options = {}, &block) ⇒ Object 



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# File 'lib/ocrunner/parse_machine.rb', line 15

def event(name, options={}, &block)
  @events ||= []
  @events << @next_event.merge(
    :name => name,
    :options => options,
    :callback => block
  )
  @next_event = nil
end

.match(regex) ⇒ Object 



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# File 'lib/ocrunner/parse_machine.rb', line 10

def match(regex)
  @next_event ||= {}
  @next_event[:regexes] ||= []
  @next_event[:regexes] << regex
end

.state(name, transitions = {}) ⇒ Object 



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# File 'lib/ocrunner/parse_machine.rb', line 24

def state(name, transitions={})
  @states ||= {}
  @states[name] ||= {}
  @states[name][:transitions] = transitions
end

Instance Method Details

#default_state ⇒ Object 



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# File 'lib/ocrunner/parse_machine.rb', line 41

def default_state
  self.class.states.each_pair do |state_name, state_definition|
    return state_name if state_definition[:default] == true
  end
end

#event(name) ⇒ Object 



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# File 'lib/ocrunner/parse_machine.rb', line 47

def event(name)
  self.class.events.find do |event|
    event[:name] == name
  end
end

#initialize_state ⇒ Object 



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# File 'lib/ocrunner/parse_machine.rb', line 36

def initialize_state
  @state = default_state
  raise "Default state not defined" if @state.nil?
end

#process_input(line) ⇒ Object 



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# File 'lib/ocrunner/parse_machine.rb', line 53

def process_input(line)
  self.class.events.each do |event|
    if self.class.states[@state][:transitions].has_key?(event[:name])
      event[:regexes].each do |regex|
        if regex.is_a?(String)
          regex = ORegexp.new(regex) 
        end
        if (match = regex.match(line))
          args = [line] + match[1..-1]
          self.instance_exec(*args, &event[:callback]) if event[:callback]
          @state = self.class.states[@state][:transitions][event[:name]]
          return
        end
      end
    end
  end
end