class ExecutionPoint

  attr_reader :backtrace

  def self.current
    new(caller)
  end

  def initialize(backtrace)
    @backtrace = backtrace
  end

  def first_relevant_line_of_backtrace
    @backtrace && (@backtrace.reject { |l| /\Aorg\/jruby\//.match(l) }.first || 'unknown:0')
  end

  def file_name
    /\A(.*?):\d+/.match(first_relevant_line_of_backtrace)[1]
  end

  def line_number
    Integer(/\A.*?:(\d+)/.match(first_relevant_line_of_backtrace)[1])
  end

  def ==(other)
    return false unless other.is_a?(ExecutionPoint)
    (file_name == other.file_name) and (line_number == other.line_number)
  end

  def to_s
    "file: #{file_name}; line: #{line_number}"
  end

  def inspect
    to_s
  end

end
