Module: ActiveFedora::Datastreams::ClassMethods

Defined in:

lib/active_fedora/datastreams.rb

Instance Method Summary

• #has_file_datastream(args = {}) ⇒ Object

  Specify the attributes of a file bearing datastream.

• #has_metadata(args) { ... } ⇒ Object

  This method is used to specify the details of a datastream.

Instance Method Details

#has_file_datastream(args = {}) ⇒ Object

Specify the attributes of a file bearing datastream

Parameters:

• args (Hash) (defaults to: {})

Options Hash (args):

• :name (Object) — default: "content" —

  The dsid of the datastream

• :type (Object) — default: ActiveFedora::Datastream —

  The class the datastream should have

• :label (Object) — default: "File Datastream" —

  The default value to put in the dsLabel field

• :control_group (Object) — default: "M" —

  The type of controlGroup to store the datastream as. Defaults to M

# File 'lib/active_fedora/datastreams.rb', line 271

def has_file_datastream(args = {})
  ds_specs[args.fetch(:name, "content")]= {
      :type => args.fetch(:type,ActiveFedora::Datastream),
      :label =>  args.fetch(:label,"File Datastream"),
      :control_group => args.fetch(:control_group,"M")
  }
end

#has_metadata(args) { ... } ⇒ Object

This method is used to specify the details of a datastream. args must include :name. Note that this method doesn’t actually execute the block, but stores it at the class level, to be executed by any future instantiations.

Parameters:

• args (Hash)

Options Hash (args):

• :type (Class) —

  The class that will represent this datastream, should extend “Datastream”

• :name (String) —

  the handle to refer to this datastream as

• :label (String) —

  sets the fedora label

• :control_group (String) — default: 'X' —

  must be one of ‘E’, ‘X’, ‘M’, ‘R’

• :disseminator (String) —

  Sets the disseminator location see ActiveFedora::Datastreams#add_disseminator_location_to_datastreams

• :url (String)
• :versionable (Boolean) — default: true —

  Should versioned datastreams be stored

Yields:

• block executed by some kinds of datastreams

# File 'lib/active_fedora/datastreams.rb', line 258

def has_metadata(args, &block)
  spec = {:type => args[:type], :label =>  args.fetch(:label,""), :control_group => args.fetch(:control_group,"X"), :disseminator => args.fetch(:disseminator,""), :url => args.fetch(:url,""),:block => block}
  spec[:versionable] = args[:versionable] if args.has_key? :versionable
  ds_specs[args[:name]]= spec
end