Class: NagiosConfig::Parser

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

Constant Summary collapse

NEWLINE = 
"\n".freeze
EQUALS = 
"=".freeze
OPEN_BRACE = 
"{".freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(ignore_comments = false) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/nagios_config/parser.rb', line 15

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

Instance Attribute Details

#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

Instance Method Details

#<<(string) ⇒ Object 



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# File 'lib/nagios_config/parser.rb', line 64

def <<(string)
  @scanner << string
  @state = send(@state)
end

#parse(io) ⇒ Object 



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# File 'lib/nagios_config/parser.rb', line 22

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

#stream_parse(io) ⇒ Object 



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# File 'lib/nagios_config/parser.rb', line 57

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