class SoftLayer::ObjectMaskTokenizer

This class is an implementation detail of the ObjectMaskParser

It takes an Object Mask String and breaks it down into ObjectMaskToken instances.

Constants

ObjectMask_Token_Specs

Public Class Methods

new(mask_string) click to toggle source

# File lib/softlayer/ObjectMaskTokenizer.rb, line 28
def initialize(mask_string)
  @mask_string = mask_string.clone
  @scanner = StringScanner.new(@mask_string)
  @current_token = nil
end

Public Instance Methods

current_token() click to toggle source

# File lib/softlayer/ObjectMaskTokenizer.rb, line 38
def current_token
  @current_token = next_token if !@current_token
  @current_token
end

more_tokens?() click to toggle source

# File lib/softlayer/ObjectMaskTokenizer.rb, line 34
def more_tokens?
  return @current_token == nil || !@current_token.end_of_string?
end

next_token() click to toggle source

# File lib/softlayer/ObjectMaskTokenizer.rb, line 43
def next_token
  # if we're at the end of the string, we keep returning the
  # EOS token
  if more_tokens? then

    if !@scanner.eos?
      # skip whitespace
      @scanner.skip(/\s+/)

      # search through the token specs to find which (if any) matches
      token_spec = ObjectMask_Token_Specs.find() do |token_spec|
        @scanner.check(token_spec[0])
      end

      # if a good token spec was found, set the current token to the one found
      if token_spec
        @current_token = ObjectMaskToken.new(token_spec.last, @scanner.scan(token_spec[0]))
      else
        @current_token = ObjectMaskToken.new(:invalid_token, @scanner.rest)
        @scanner.terminate
      end
    else
      @current_token = ObjectMaskToken.new(:eos)
    end
  end

  @current_token
end