implementation of pcdm:order

gistfile1.txt

module Hydra::PCDM
  class Order < ActiveFedora::Base
    include Hydra::PCDM::OrderBehavior
  end
end

module Hydra::PCDM
  module OrderBehavior
    extend ActiveSupport::Concern
    
    # behaviors
    * order members must be pcdm:Collection and/or pcdm:Object
    
    # behavior:
    #   1) Hydra::PCDM::Order can aggregate (pcdm:hasMember)  Hydra::PCDM::Collection
    #   2) Hydra::PCDM::Order can aggregate (pcdm:hasMember)  Hydra::PCDM::Object
    #   3) Hydra::PCDM::Order can aggregate (ore:aggregates)  Hydra::PCDM::Object  (Object related to the Order)
    #   4) Hydra::PCDM::Order can contain (pcdm:hasRelatedFile) Hydra::PCDM::File

    #   5) Hydra::PCDM::Order can NOT aggregate Hydra:PCDM:Order
    #   6) Hydra::PCDM::Order can NOT aggregate non-PCDM object
    #   7) Hydra::PCDM::Order can NOT contain (pcdm:hasFile)  Hydra::PCDM::File

    #   8) Hydra::PCDM::Order can have descriptive metadata
    #   9) Hydra::PCDM::Order can have access metadata

    included do
      type RDFVocabularies::PCDMTerms.Order
      
      # members can be collections and/or objects
      aggregates :members, predicate: RDFVocabularies::PCDMTerms.hasMember, class_name: "ActiveFedora::Base"
      
      # related objects
      indirectly_contains :related_objects, has_member_relation: RDF::Vocab::ORE.aggregates,
        inserted_content_relation: RDF::Vocab::ORE.proxyFor, class_name: "ActiveFedora::Base",
        through: 'ActiveFedora::Aggregation::Proxy', foreign_key: :target
        
      # related files
      directly_contains :related_files, has_member_relation: RDFVocabularies::PCDMTerms.hasRelatedFile,
        class_name: "Hydra::PCDM::File"
    
    end
    
    # plus methods specific to ordering
    
  end

end