Class: NagiosConfig::Parser

Inherits:
Object
  • Object
show all
Includes:
Events::Emitter
Defined in:
lib/nagios_config/parser.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/nagios_config/parser.rb', line 11

def initialize
  @state = :body
  self.scanner = StringScanner.new("")
  self.value_buffer = ""
end

Instance Attribute Details

#in_define ⇒ Object

Returns the value of attribute in_define.



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# File 'lib/nagios_config/parser.rb', line 8

def in_define
  @in_define
end

#scanner ⇒ Object

Returns the value of attribute scanner.



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# File 'lib/nagios_config/parser.rb', line 8

def scanner
  @scanner
end

#state ⇒ Object

Returns the value of attribute state.



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# File 'lib/nagios_config/parser.rb', line 8

def state
  @state
end

#value_buffer ⇒ Object

Returns the value of attribute value_buffer.



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# File 'lib/nagios_config/parser.rb', line 8

def value_buffer
  @value_buffer
end

Instance Method Details

#<<(string) ⇒ Object 



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# File 'lib/nagios_config/parser.rb', line 60

def <<(string)
  scanner.string.replace(scanner.rest)
  scanner.reset
  scanner << string
  self.state = send(state)
end

#parse(io) ⇒ Object 



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# File 'lib/nagios_config/parser.rb', line 17

def parse(io)
  root = NagiosConfig::Config.new
  current_define = nil
  current_variable = nil
  on(:comment) do |comment|
    (current_define || root).add_node(NagiosConfig::Comment.new(comment))
  end
  on(:whitespace) do |whitespace|
    (current_define || root).add_node(NagiosConfig::Whitespace.new(whitespace))
  end
  on(:trailing_comment) do |comment|
    (current_define || root).nodes.last.add_node(NagiosConfig::TrailingComment.new(comment))
  end
  on(:name) do |name|
    current_variable = NagiosConfig::Variable.new
    current_variable.add_node(NagiosConfig::Name.new(name))
    (current_define || root).add_node(current_variable)
  end
  on(:value) do |value|
    current_variable.add_node(NagiosConfig::Value.new(value))
    current_variable = nil
  end
  on(:begin_define) do
    current_define = NagiosConfig::Define.new
    root.add_node(current_define)
  end
  on(:type) do |type|
    current_define.add_node(NagiosConfig::Type.new(type))
  end
  on(:finish_define) do
    current_define = nil
  end
  stream_parse(io)
  root
end

#stream_parse(io) ⇒ Object 



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# File 'lib/nagios_config/parser.rb', line 53

def stream_parse(io)
  io = StringIO.new(io) unless io.respond_to?(:read)
  until io.eof?
    self << io.read(1024)
  end
end