Method: ContentData::ContentData#get_query

Defined in:
lib/content_data/content_data.rb

#get_query(variable, params) ⇒ Object

TODO simplify conditions This mehod is experimental and shouldn't be used nil is used to define +/- infinity for to/from method arguments from/to values are exlusive in condition’a calculations Need to take care about ‘==’ operation that is used for object’s comparison. In need of case user should define it’s own ‘==’ implemementation.



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# File 'lib/content_data/content_data.rb', line 448

def get_query(variable, params)
  raise RuntimeError.new 'This method is experimental and shouldn\'t be used'

  exact = params['exact'].nil? ? Array.new : params['exact']
  from = params['from']
  to = params ['to']
  is_inside = params['is_inside']

  unless ContentInstance.new.instance_variable_defined?("@#{attribute}")
    raise ArgumentError "#{variable} isn't a ContentInstance variable"
  end

  if (exact.nil? && from.nil? && to.nil?)
    raise ArgumentError 'At least one of the argiments {exact, from, to} must be defined'
  end

  if (!(from.nil? || to.nil?) && from.kind_of?(to.class))
    raise ArgumentError 'to and from arguments should be comparable one with another'
  end

  # FIXME add support for from/to for Strings
  if ((!from.nil? && !from.kind_of?(Numeric.new.class))\
        || (!to.nil? && to.kind_of?(Numeric.new.class)))
    raise ArgumentError 'from and to options supported only for numeric values'
  end

  if (!exact.empty? && (!from.nil? || !to.nil?))
    raise ArgumentError 'exact and from/to options are mutually exclusive'
  end

  result_index = ContentData.new
  instances.each_value do |instance|
    is_match = false
    var_value = instance.instance_variable_get("@#{variable}")

    if exact.include? var_value
      is_match = true
    elsif (from.nil? || var_value > from) && (to.nil? || var_value < to)
      is_match = true
    end

    if (is_match && is_inside) || (!is_match && !is_inside)
      checksum = instance.checksum
      result_index.add_content(contents[checksum]) unless result_index.content_exists(checksum)
      result_index.add_instance instance
    end
  end
  result_index
end