Class: RGovData::Catalog

Inherits:
Object
  • Object
show all
Includes:
Dn
Defined in:
lib/rgovdata/catalog/catalog.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Dn

#attributes, #id, #initialization_hash, #meta_attributes, #to_param, #to_s

Constructor Details

#initialize(default_realm = nil) ⇒ Catalog

Returns a new instance of Catalog.



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# File 'lib/rgovdata/catalog/catalog.rb', line 29

def initialize(default_realm=nil)
  @realm = default_realm && default_realm.to_sym
end

Instance Attribute Details

#realm ⇒ Object

Returns the value of attribute realm.



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# File 'lib/rgovdata/catalog/catalog.rb', line 2

def realm
  @realm
end

Class Method Details

.get(key) ⇒ Object

Returns the object specified by the key Key specification: //<realm>/<service-key>/<data-set-name> All key components are optional - you will get the best matching object for the key spec //sg - will return RGovData::Catalog for realm=:sg //sg/nlb - will return RGovData::ServiceListing for the nlb service in SG /nlb - will return RGovData::ServiceListing for the nlb service in SG (assuming SG is the default realm) //sg/nlb/Library - will return RGovData::OdataService for the nlb Library service in SG



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# File 'lib/rgovdata/catalog/catalog.rb', line 14

def get(key)
  key ||= '//'
  key.gsub!(':','/') # handle alternate encoding
  keypart = Regexp.new(/(?:\/\/([^\/]+))?(?:\/([^\/]+))?(?:\/([^\/]+))?/).match(key)
  found = catalog = self.new(keypart[1])
  if keypart[2]
    found = service = catalog.get_service(keypart[2])
    if keypart[3]
      found = service.get_dataset(keypart[3])
    end
  end
  found
end

Instance Method Details

#get_service(key) ⇒ Object

Returns the service(s) matching key



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# File 'lib/rgovdata/catalog/catalog.rb', line 45

def get_service(key)
  return nil unless services && !services.empty?
  matches = services.select {|s| s.key =~ /#{key}/}
  matches.count == 1 ? matches.first : matches
end

#realms ⇒ Object

Returns available realms



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# File 'lib/rgovdata/catalog/catalog.rb', line 34

def realms
  # TODO: currently hard-coded
  [:sg,:us].map{|realm| self.class.new(realm) }
end

#records ⇒ Object

Generic interface to return the currently applicable record set

> overrides RGovData::Dn.records



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# File 'lib/rgovdata/catalog/catalog.rb', line 65

def records
  if realm.present?
    services
  else
    realms
  end
end

#services ⇒ Object

Returns an array of ServiceListings for the current realm



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# File 'lib/rgovdata/catalog/catalog.rb', line 40

def services
  @services ||= registry_strategy.load_services
end