lazy load fhir packages

lib/fhir_models/bootstrap/common_definitions.rb

@@ -10,22 +10,30 @@ def self.included(base)
  module ClassMethods
  extend FHIR::Deprecate
 
+ def ig_resources
+ @ig_resource ||= @ig_loader.load
+ end
+
+ def cache
+ @cache ||= {}
+ end
+
+ # This method actually just sets up lazy loading to avoid having to load
+ # everything at start time.
  def load_igs(ig_file_name)
- ig_loader = FHIR::Generator::IGLoader.new(ig_file_name)
- @ig_resources = ig_loader.load
- @cache = {}
+ @ig_loader = FHIR::Generator::IGLoader.new(ig_file_name)
  end
 
  def find_structure_definition(structure_defs, target_name)
  return nil if target_name.nil?
- return @cache[target_name] if @cache[target_name]
+ return cache[target_name] if cache[target_name]
 
  definition = structure_defs.find do |sd|
  sd['id'] == target_name || sd['name'] == target_name || sd['url'] == target_name
  end
 
- @cache[target_name] = create_structure_definition(definition) if definition
- @cache[target_name]
+ cache[target_name] = create_structure_definition(definition) if definition
+ cache[target_name]
  end
 
  def create_structure_definition(definition)
@@ -39,12 +47,12 @@ def create_structure_definition(definition)
  # # ----------------------------------------------------------------
 
  def primitive_types
- @ig_resources.primitive_types
+ ig_resources.primitive_types
  end
  deprecate :get_primitive_types, :primitive_types
 
  def complex_types
- @ig_resources.complex_types
+ ig_resources.complex_types
  end
  deprecate :get_complex_types, :complex_types
 
@@ -58,7 +66,7 @@ def type_definition(type_name)
  # ----------------------------------------------------------------
 
  def resource_definitions
- @ig_resources.resource_definitions
+ ig_resources.resource_definitions
  end
  deprecate :get_resource_definitions, :resource_definitions
 
@@ -68,15 +76,15 @@ def resource_definition(resource_name)
  deprecate :get_resource_definition, :resource_definition
 
  def extension_definition(extension_name)
- find_structure_definition(@ig_resources.extension_definitions, extension_name)
+ find_structure_definition(ig_resources.extension_definitions, extension_name)
  end
  deprecate :get_extension_definition, :extension_definition
 
  # Get the basetype (String) for a given profile or extension.
  def basetype(uri)
  return nil if uri.nil?
 
- defn = @ig_resources.profiles.detect { |x| x['url'] == uri } || @ig_resources.extension_definitions.detect { |x| x['url'] == uri }
+ defn = ig_resources.profiles.detect { |x| x['url'] == uri } || ig_resources.extension_definitions.detect { |x| x['url'] == uri }
  return nil if defn.nil?
 
  defn['type']
@@ -85,14 +93,14 @@ def basetype(uri)
 
  # Get the StructureDefinition for a given profile.
  def profile(profile_url)
- find_structure_definition(@ig_resources.profiles, profile_url)
+ find_structure_definition(ig_resources.profiles, profile_url)
  end
  deprecate :get_profile, :profile
 
  def profiles_for_resource(resource_name)
  return nil if resource_name.nil?
 
- @ig_resources.profiles.select { |x| x['type'] == resource_name }
+ ig_resources.profiles.select { |x| x['type'] == resource_name }
  end
  deprecate :get_profiles_for_resource, :profile_for_resource
 
@@ -101,18 +109,18 @@ def profiles_for_resource(resource_name)
  # ----------------------------------------------------------------
 
  def valuesets
- @ig_resources.get_value_sets
+ ig_resources.get_value_sets
  end
 
  def get_codes(url)
- @ig_resources.get_codes(url)
+ ig_resources.get_codes(url)
  end
 
  # Why do we have this function?
  def get_display(system, code)
  return nil if system.nil? || code.nil?
 
- @ig_resources.get_value_sets.each do |value_set|
+ ig_resources.get_value_sets.each do |value_set|
  if value_set['expansion'] && value_set['expansion']['contains']
  value_set['expansion']['contains'].each do |contain|
  return contain['display'] if contain['system'] == system && contain['code'] == code
@@ -132,7 +140,7 @@ def get_display(system, code)
  # ----------------------------------------------------------------
 
  def self.search_parameters(type_name)
- @ig_resources.get_search_parameters(type_name)
+ ig_resources.get_search_parameters(type_name)
  end
  deprecate :get_search_parameters, :search_parameters
  end