Class: RETS4R::Client::Metadata

Inherits:
Hash
  • Object
show all
Defined in:
lib/rets4r/client/parsers/metadata.rb

Overview

Provides a Hash-like representation of metadata. Currently only compact metadata is supported.

String keys represent data that has come from the parsed metadata file. Symbol keys are used to indicate categories such as :lookup_types. All are pluralized except for :search_help, and have are snakecase.

The following is the basic structure of a metadata object, which generally follows the RETS specification metadata structure, but with a few notable non-nested exceptions such as lookup_types.

=> {<fkey_id> => {…},

'Comments'    => ...,
'SystemID'    => ...,
'SystemDescription' => ...
<Resource Name> => {...,
                 :lookup_types => {
                   <Lookup Name> => {<Lookup Type Value> => {...}}},

         :objects => {<Object Type> => {...}},
         :classes => {<Class Name>: => {...,
                                        :tables => {<System Name> => {...}}},
         :search_help => {<Search Help ID> => {...}},
         :lookups     => {<Lookup Name>    => {...}}
         :edit_masks: => {<Edit Mask ID>:  => {...}}

Update related metadata is currently NOT handled by the parser. The following metadata types ARE handled by the parser: System, Resource, Class, Table, Object, Lookup, LookupType, ForeignKeys, SearchHelp, and EditMask.

To generate a metadata object, use one of CompactDocument parse methods.

Defined Under Namespace

Classes: CompactDocument

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Metadata

The initial version of this would set the hash default_proc to create new hashes that would in turn create new hashes, which is quite clean, but also meant that you couldn’t simply check to see if a given key was nil. Because this is meant to be a mostly transparent replacement of the REXML-based parser, I decided to manually create nested hashes as needed in case existing code relied on the existence of nils.



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# File 'lib/rets4r/client/parsers/metadata.rb', line 52

def initialize
  super(Hash.new)
end

Instance Method Details

#class_tables(resource, klass) ⇒ Object 



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# File 'lib/rets4r/client/parsers/metadata.rb', line 70

def class_tables(resource, klass)
  resource_class(resource, klass)[:tables] ||= {}
end

#edit_masks(resource) ⇒ Object 



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# File 'lib/rets4r/client/parsers/metadata.rb', line 91

def edit_masks(resource)
  resource(resource)[:edit_masks] ||= {}
end

#foreign_keys ⇒ Object 



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# File 'lib/rets4r/client/parsers/metadata.rb', line 95

def foreign_keys
  self[:foreign_keys] ||= {}
end

#resource(name) ⇒ Object

Helper access methods to ensure that nested hashes are created as needed.



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# File 'lib/rets4r/client/parsers/metadata.rb', line 58

def resource(name)
  self[name] ||= {}
end

#resource_class(resource, klass) ⇒ Object 



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# File 'lib/rets4r/client/parsers/metadata.rb', line 66

def resource_class(resource, klass)
  resource_classes(resource)[klass] ||= {}
end

#resource_classes(resource) ⇒ Object 



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# File 'lib/rets4r/client/parsers/metadata.rb', line 62

def resource_classes(resource)
  resource(resource)[:classes] ||= {}
end

#resource_lookup_types(resource, lookup) ⇒ Object 



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# File 'lib/rets4r/client/parsers/metadata.rb', line 82

def resource_lookup_types(resource, lookup)
  lookups = resource(resource)[:lookup_types] ||= {}
  lookups[lookup] ||= {}
end

#resource_lookups(resource) ⇒ Object 



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# File 'lib/rets4r/client/parsers/metadata.rb', line 78

def resource_lookups(resource)
  resource(resource)[:lookups] ||= {}
end

#resource_objects(resource) ⇒ Object 



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# File 'lib/rets4r/client/parsers/metadata.rb', line 74

def resource_objects(resource)
  resource(resource)[:objects] ||= {}
end

#search_help(resource) ⇒ Object 



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# File 'lib/rets4r/client/parsers/metadata.rb', line 87

def search_help(resource)
  resource(resource)[:search_help] ||= {}
end