Class: Graphite::TargetParser

Inherits:
Object
  • Object
show all
Defined in:
lib/graphite/target_parser.rb

Defined Under Namespace

Classes: TargetParserError

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(data = nil) ⇒ TargetParser

Returns a new instance of TargetParser.



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# File 'lib/graphite/target_parser.rb', line 15

def initialize(data=nil)
  @data = data
  @parser = TargetGrammerParser.new
end

Instance Attribute Details

#data ⇒ Object

Returns the value of attribute data.



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# File 'lib/graphite/target_parser.rb', line 14

def data
  @data
end

#parser ⇒ Object (readonly)

Returns the value of attribute parser.



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# File 'lib/graphite/target_parser.rb', line 13

def parser
  @parser
end

#tree ⇒ Object (readonly)

Returns the value of attribute tree.



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# File 'lib/graphite/target_parser.rb', line 13

def tree
  @tree
end

Class Method Details

.grammer ⇒ Object 



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# File 'lib/graphite/target_parser.rb', line 43

def self.grammer
  File.expand_path("../target_grammer.treetop",__FILE__)
end

.parse(data) ⇒ Object 



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# File 'lib/graphite/target_parser.rb', line 32

def self.parse(data)
  inst = self.new(data)
  inst.parse
  inst
end

Instance Method Details

#error ⇒ Object 



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# File 'lib/graphite/target_parser.rb', line 40

def error
  { message: @parser.failure_reason, line: @parser.failure_line, column: @parser.failure_column }
end

#error? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphite/target_parser.rb', line 37

def error?
  @tree.nil?
end

#parse(data = nil) ⇒ Object 



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# File 'lib/graphite/target_parser.rb', line 19

def parse(data=nil)
  if data.present?
    @data = data
  end
  @tree = @parser.parse(@data)
end

#parse!(data = nil) ⇒ Object 



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# File 'lib/graphite/target_parser.rb', line 25

def parse!(data=nil)
  self.parse(data)
  if error?
    raise TargetParserError.new(error)
  end
  @tree
end