You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: hash_parser.rb
    path of file: ./repos/search_cop/lib/search_cop
    
    the code of the file until where you have to start completion: class SearchCop::HashParser
  attr_reader :query_info

  def initialize(query_info)
    @query_info = query_info
  end

 
    
  def parse(hash, query_options = {})
    default_operator = SearchCop::Helpers.sanitize_default_operator(query_options)

    res = hash.collect do |key, value|
      case key
      when :and
        value.collect { |val| parse val }.inject(:and)
      when :or
        value.collect { |val| parse val }.inject(:or)
      when :not
        parse(value).not
      when :query
        SearchCop::Parser.parse(value, query_info)
      else
        parse_attribute(key, value)
      end
    end