as3_annotation_parser.rb

# Used to parse ActionScript style annotations
# [Annotation(key="value",foo="bar")]
# Where Annotation is the name and key and foo are attribute names.
# Quick string matching, does not create an "Annotation Object"
# for now, though that would be an improvement.
class AS3AnnotationParser
  #Does the given annotation exist in the provided string?
  def self.has_annotation (contents, name)
    contents.match(/\[#{name}[^\]]?+\]/) != nil
  end

  #Get the annotation block
  def self.get_annotation (contents, name)
    contents.match(/\[#{name}[^\]]+\]/).to_s
  end

  #Parse out a value based on the given key
  #Annotation block passed in as a string
  def self.get_annotation_attribute (annotation, attr_name)
    attributes = annotation.scan(/(\w+)\s?\=\s?\"([^\"]+)\"/)
    attributes.each_with_index {|e, i|
      if e[0] === attr_name
        return e[1]
      end
    }
    return nil
  end
end