Class: MCollective::Matcher::Scanner

Inherits:
Object
  • Object
show all
Defined in:
lib/mcollective/matcher/scanner.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(arguments) ⇒ Scanner

Returns a new instance of Scanner.



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# File 'lib/mcollective/matcher/scanner.rb', line 6

def initialize(arguments)
  @token_index = 0
  @arguments = arguments.split("")
  @seperation_counter = 0
  @white_spaces = 0
end

Instance Attribute Details

#arguments ⇒ Object

Returns the value of attribute arguments.



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# File 'lib/mcollective/matcher/scanner.rb', line 4

def arguments
  @arguments
end

#token_index ⇒ Object

Returns the value of attribute token_index.



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# File 'lib/mcollective/matcher/scanner.rb', line 4

def token_index
  @token_index
end

Instance Method Details

#get_token ⇒ Object

Scans the input string and identifies single language tokens



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# File 'lib/mcollective/matcher/scanner.rb', line 14

def get_token
  if @token_index >= @arguments.size
    return nil
  end

  case @arguments[@token_index]
  when "("
    return "(", "("

  when ")"
    return ")", ")"

  when "n"
    if (@arguments[@token_index + 1] == "o") && (@arguments[@token_index + 2] == "t") && ((@arguments[@token_index + 3] == " ") || (@arguments[@token_index + 3] == "("))
      @token_index += 2
      return "not", "not"
    else
      gen_statement
    end

  when "!"
    return "not", "not"

  when "a"
    if (@arguments[@token_index + 1] == "n") && (@arguments[@token_index + 2] == "d") && ((@arguments[@token_index + 3] == " ") || (@arguments[@token_index + 3] == "("))
      @token_index += 2
      return "and", "and"
    else
      gen_statement
    end

  when "o"
    if (@arguments[@token_index + 1] == "r") && ((@arguments[@token_index + 2] == " ") || (@arguments[@token_index + 2] == "("))
      @token_index += 1
      return "or", "or"
    else
      gen_statement
    end

  when " "
    return " ", " "

  else
    gen_statement
  end
end