Module: HQMF1::Utilities

Includes:
HQMF::Conversion::Utilities
Included in:
Attribute, Comparison, DataCriteria, Document, Expression, Observation, PopulationCriteria, Precondition, Range, Restriction, Value
Defined in:
lib/hqmf-parser/1.0/utilities.rb

Instance Method Summary collapse

Methods included from HQMF::Conversion::Utilities

#build_hash, #check_equality, #json_array, #openstruct_to_json

Instance Method Details

#attr_val(xpath) ⇒ Object

Utility function to handle optional attributes

Parameters:

  • xpath —

    an XPath that identifies an XML attribute

Returns:

  • the value of the attribute or nil if the attribute is missing



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# File 'lib/hqmf-parser/1.0/utilities.rb', line 9

def attr_val(xpath)
  attr = @entry.at_xpath(xpath)
  if attr
    attr.value
  else
    nil
  end
end

#clean_json(json) ⇒ Object 



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# File 'lib/hqmf-parser/1.0/utilities.rb', line 18

def clean_json(json)
  json.reject!{|k,v| v.nil? || (v.respond_to?(:empty?) && v.empty?)}
end

#clean_json_recursive(json) ⇒ Object 



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# File 'lib/hqmf-parser/1.0/utilities.rb', line 22

def clean_json_recursive(json)
  json.each do |k,v|
    if v.is_a? Hash
      clean_json_recursive(v)
      clean_json(v)
    elsif v.is_a? Array
      v.each do |e|
        if e.is_a? Hash
          clean_json_recursive(e)
          clean_json(e)
        end
      end
    end
    
  end
  clean_json(json)
end