Class: HQMF2::SourceDataCriteriaHelper

Inherits:
Object
  • Object
show all
Defined in:
lib/hqmf-parser/2.0/source_data_criteria_helper.rb

Overview

Generates the Source Data Criteria from the entries in the HQMF

Class Method Summary collapse

Class Method Details

.already_stripped?(dc) ⇒ Boolean

determins if a data criteria has any non-SDC fields set (i.e., those fields need to be stripped)

Returns:

  • (Boolean) 


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# File 'lib/hqmf-parser/2.0/source_data_criteria_helper.rb', line 39

def self.already_stripped?(dc)
  dc.field_values.blank? && dc.temporal_references.blank? && dc.subset_operators.blank? && dc.value.blank? && dc.negation.blank? && dc.negation_code_list_id.blank?
end

.as_source_data_criteria(entry, data_criteria_references = {}, occurrences_map = {}) ⇒ Object

Creates a data criteria based on an entry xml, removes any unnecessary elements (for the source),

and adds a data criteria reference if none exist



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# File 'lib/hqmf-parser/2.0/source_data_criteria_helper.rb', line 45

def self.as_source_data_criteria(entry, data_criteria_references = {}, occurrences_map = {})
  dc = DataCriteria.new(entry, data_criteria_references, occurrences_map)
  dc.original_id = dc.id
  unless dc.definition == 'derived' # && dc.temporal_references.blank? && dc.subset_operators.blank? && dc.value.blank? && dc.field_values.blank?
    # add "_source" to the id to differentiate from the non-source
    dc.id = "#{dc.id}_source"
  end
  dc = SourceDataCriteriaHelper.strip_non_sc_elements(dc)
  # add it as a reference
  if dc && (data_criteria_references[dc.id].nil? || data_criteria_references[dc.id].code_list_id.nil?)
    data_criteria_references[dc.original_id] = dc
  end

  dc
end

.find_existing_source_data_criteria(list, candidate) ⇒ Object

Check if there is an existing entry in the source data criteria list that matches the candidate passed in this is used to prevent adding duplicate source data criteria entries when one already exists



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# File 'lib/hqmf-parser/2.0/source_data_criteria_helper.rb', line 63

def self.find_existing_source_data_criteria(list, candidate)
  list.each do |sdc|
    # check if we have an exact match on an existing SDC
    return sdc if SourceDataCriteriaHelper.identifier(sdc) == SourceDataCriteriaHelper.identifier(candidate)
    # we have another existing copy of the specific occurrence (identified via the constant and occurrence lettering), use that rather than duplicating... there will not be an
    # exact match for variables since a new child will have been generated
    return sdc if !sdc.specific_occurrence_const.nil? && sdc.specific_occurrence_const == candidate.specific_occurrence_const && sdc.specific_occurrence == candidate.specific_occurrence
  end
  nil
end

.get_source_data_criteria_list(full_criteria_list, data_criteria_references = {}, occurrences_map = {}) ⇒ Object

Given a list of criteria obtained from the XML, generate most of the source data criteria (since no explicit sources are given). After generating the source data criteria, filter the list to not include repeated, unnecessary sources, but maintain and return map of those that have been removed to those that they were replaced with.



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# File 'lib/hqmf-parser/2.0/source_data_criteria_helper.rb', line 78

def self.get_source_data_criteria_list(full_criteria_list, data_criteria_references = {}, occurrences_map = {})
  # currently, this will erase the sources if the ids are the same, but will not correct references later on
  source_data_criteria = full_criteria_list.map do |entry|
    SourceDataCriteriaHelper.as_source_data_criteria(entry, data_criteria_references, occurrences_map)
  end

  collapsed_source_data_criteria_map = {}
  uniq_source_data_criteria = {}
  source_data_criteria.each do |sdc|
    identifier = SourceDataCriteriaHelper.identifier(sdc)
    if uniq_source_data_criteria.key? identifier
      collapsed_source_data_criteria_map[sdc.original_id] = uniq_source_data_criteria[identifier].id
    else
      uniq_source_data_criteria[identifier] = sdc
    end
  end
  unique = uniq_source_data_criteria.values.reject { |dc| SourceDataCriteriaHelper.should_reject?(dc) }

  # we need an empty data criteria in source that acts as the target for the specific occurrence
  # the data criteria that we are duplicating will eventually get turned into a specific occurrence
  occurrences = unique.select {|dc| occurrences_map[dc.id] && dc.definition != 'derived' }
  occurrences.each do |occurrence|
    # do not create a nonspecific SDC for variables
    unless occurrence.variable
      dc = SourceDataCriteriaHelper.as_source_data_criteria(occurrence.entry)
      dc.id = "#{dc.id}_nonSpecific"
      dc.instance_variable_set(:@source_data_criteria, dc.id)
      unique << dc unless SourceDataCriteriaHelper.find_existing_source_data_criteria(unique, dc)
    end
  end

  [unique, collapsed_source_data_criteria_map]
end

.identifier(criteria) ⇒ Object

Generates an identifier based on the leftover elements included in the source data criteria.



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# File 'lib/hqmf-parser/2.0/source_data_criteria_helper.rb', line 5

def self.identifier(criteria)
  sha256 = ''
  sha256 << "#{criteria.code_list_id}:"
  sha256 << "#{criteria.definition}:"
  sha256 << "#{criteria.status}:"
  sha256 << "#{criteria.specific_occurrence}:"
  sha256 << "#{criteria.specific_occurrence_const}:"
  sha256 << "#{criteria.variable}:"
  sha256 << (criteria.children_criteria.nil? ? '<nil>:' : "#{criteria.children_criteria.sort.join(',')}:")

  Digest::SHA256.hexdigest sha256
end

.should_reject?(dc) ⇒ Boolean

Rejects any derived elements as they should never be used as source.

Returns:

  • (Boolean) 


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# File 'lib/hqmf-parser/2.0/source_data_criteria_helper.rb', line 19

def self.should_reject?(dc)
  dc.definition == 'derived'
end

.strip_non_sc_elements(dc) ⇒ Object

Removes unnecessary elements from a data criteria to create a source data criteria



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# File 'lib/hqmf-parser/2.0/source_data_criteria_helper.rb', line 24

def self.strip_non_sc_elements(dc)
  if [HQMF::DataCriteria::SATISFIES_ANY, HQMF::DataCriteria::SATISFIES_ALL].include? dc.definition
    dc.instance_variable_set(:@definition, 'derived')
  end
  dc.instance_variable_set(:@source_data_criteria, dc.id)
  dc.instance_variable_set(:@field_values, {})
  dc.instance_variable_set(:@temporal_references, [])
  dc.instance_variable_set(:@subset_operators, [])
  dc.instance_variable_set(:@value, nil)
  dc.instance_variable_set(:@negation, false)
  dc.instance_variable_set(:@negation_code_list_id, nil)
  dc
end