Class: QDM::DataElement

Inherits:
Object
  • Object
show all
Includes:
Mongoid::Document
Defined in:
app/models/qdm/basetypes/data_element.rb

Overview

Represents QDM datatype (parent class of all generated QDM datatype models)

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ DataElement

Returns a new instance of DataElement.



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# File 'app/models/qdm/basetypes/data_element.rb', line 19

def initialize(options = {})
  # class is reserved word. changed to clazz
  if options['class']
    options['clazz'] = options['class']
    options.delete('class')
  end
  super(options)
  # default id to the mongo ObjectId for this DataElement if it isnt already defined
  self.id = _id.to_s unless id?
end

Class Method Details

.demongoize(object) ⇒ Object

Get the object as it was stored in the database, and instantiate this custom class from it.



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# File 'app/models/qdm/basetypes/data_element.rb', line 155

def demongoize(object)
  return nil unless object

  object = object.symbolize_keys
  if object.is_a?(Hash)
    data_element = QDM.const_get(object[:_type])
    data_element.attribute_names.each do |field|
      data_element.send(field + '=', object[field.to_sym])
    end
    data_element
  else object
  end
end

.mongoize(object) ⇒ Object

Takes any possible object and converts it to how it would be stored in the database.



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# File 'app/models/qdm/basetypes/data_element.rb', line 171

def mongoize(object)
  case object
  when nil then nil
  when QDM::DataElement then object.mongoize
  when Hash
    object = object.symbolize_keys
    data_element = QDM.const_get(object[:_type])
    data_element.attribute_names.each do |field|
      data_element.send(field + '=', object[field.to_sym])
    end
    data_element.mongoize
  else object
  end
end

Instance Method Details

#code_system_pairs ⇒ Object

Returns all of the codes on this datatype in a way that is typical to the CQL execution engine.



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# File 'app/models/qdm/basetypes/data_element.rb', line 37

def code_system_pairs
  codes.collect do |code|
    { code: code.code, system: code.system }
  end
end

#codes ⇒ Object

Helper method that returns the codes on this data element as QDM::Code objects.



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# File 'app/models/qdm/basetypes/data_element.rb', line 45

def codes
  dataElementCodes.collect { |code| QDM::Code.demongoize(code) }
end

#get(attribute) ⇒ Object

Returns the attribute requested on the datatype.



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# File 'app/models/qdm/basetypes/data_element.rb', line 31

def get(attribute)
  send(attribute) if has_attribute?(attribute)
end

#mongoize ⇒ Object 



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# File 'app/models/qdm/basetypes/data_element.rb', line 49

def mongoize
  json_representation = {}
  attribute_names.each do |field|
    json_representation[field] = send(field).mongoize
  end
  json_representation
end

#shift_dates(seconds) ⇒ Object

Shift all fields that deal with dates by the given value. Given value should be in seconds. Positive values shift forward, negative values shift backwards.



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# File 'app/models/qdm/basetypes/data_element.rb', line 65

def shift_dates(seconds)
  fields.keys.each do |field|
    send(field + '=', (send(field).to_time + seconds.seconds).to_datetime) if send(field).is_a? DateTime
    send(field + '=', (send(field).to_time + seconds.seconds).to_datetime) if send(field).is_a? Time
    send(field + '=', send(field).shift_dates(seconds)) if (send(field).is_a? Interval) || (send(field).is_a? DataElement)

    # Special case for facility locations
    if field == 'facilityLocations'
      send(field).each do |facility_location|
        shift_facility_location_dates(facility_location, seconds)
      end
    elsif field == 'facilityLocation'
      facility_location = send(field)
      unless facility_location.nil?
        # Guessing something changed in mongoid such that facility_location gets typed to an Object
        # but this method (I think) expects a Hash.
        shift_facility_location_dates(facility_location.attributes, seconds)
        send(field + '=', facility_location)
      end
    end
  end
end

#shift_facility_location_dates(facility_location, seconds) ⇒ Object 



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# File 'app/models/qdm/basetypes/data_element.rb', line 88

def shift_facility_location_dates(facility_location, seconds)
  facility_location['locationPeriod'][:low] = (facility_location['locationPeriod'][:low].to_time + seconds).to_datetime
  facility_location['locationPeriod'][:high] = (facility_location['locationPeriod'][:high].to_time + seconds).to_datetime
end

#shift_facility_location_years(facility_location, year_shift) ⇒ Object 



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# File 'app/models/qdm/basetypes/data_element.rb', line 147

def shift_facility_location_years(facility_location, year_shift)
  facility_location.locationPeriod = facility_location.locationPeriod.shift_years(year_shift)
end

#shift_years(year_shift) ⇒ Object

The necessary reason for this function is to avoid a problem when shifting past a year that is a leap year. February 29th dates are handled by moving back to the 28th in non leap years



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# File 'app/models/qdm/basetypes/data_element.rb', line 96

def shift_years(year_shift)
  fields.keys.each do |field|
    if send(field).is_a?(QDM::Date) || send(field).is_a?(DateTime)
      # Do not shift Time values. They are stored as DateTimes with year 0.
      next if send(field).year.zero?
      raise RangeError, 'Year was shifted after 9999 or before 0001' if send(field).year + year_shift > 9999 || send(field).year + year_shift < 1

      if send(field).month == 2 && send(field).day == 29 && !::Date.leap?(year_shift + send(field).year)
        if send(field).is_a?(QDM::Date)
          shifted_date = send(field)
          shifted_date.year = shifted_date.year + year_shift
          shifted_date.day = 28
          send(field + '=', shifted_date)
        else
          send(field + '=', send(field).change(year: year_shift + send(field).year, day: 28))
        end
      elsif send(field).is_a?(QDM::Date)
        shifted_date = send(field)
        shifted_date.year = shifted_date.year + year_shift
        send(field + '=', shifted_date)
      else
        send(field + '=', send(field).change(year: year_shift + send(field).year))
      end
    end

    if send(field).is_a? FacilityLocation
      facility_location = send(field)
      unless facility_location.nil?
        shift_facility_location_years(facility_location, year_shift)
        send(field + '=', facility_location)
      end
    end

    if field == 'facilityLocations'
      facilityLocations = send(field)
      unless facilityLocations.nil?
        shiftedFacilityLocations = []
        facilityLocations.each do |location|
          # Need to convert to a QDM::FacilityLocation because it is being passed in as a Hash
          facilityLocation = QDM::FacilityLocation.new(location)
          shift_facility_location_years(facilityLocation, year_shift)
          shiftedFacilityLocations << facilityLocation
        end
        send(field + '=', shiftedFacilityLocations)
      end
    end

    send(field + '=', send(field).shift_years(year_shift)) if (send(field).is_a? Interval) || (send(field).is_a? DataElement)
  end
end

#to_json(options = nil) ⇒ Object

Include ‘_type’ in any JSON output. This is necessary for deserialization.



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# File 'app/models/qdm/basetypes/data_element.rb', line 58

def to_json(options = nil)
  serializable_hash(methods: :_type).to_json(options)
end