Class: RETS4R::Client::MetadataParser

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

Constant Summary collapse

TAGS =
[ 'METADATA-RESOURCE',
'METADATA-CLASS',
'METADATA-TABLE',
'METADATA-OBJECT',
'METADATA-LOOKUP',
'METADATA-LOOKUP_TYPE' ]

Instance Method Summary collapse

Constructor Details

#initializeMetadataParser

Returns a new instance of MetadataParser.



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# File 'lib/rets4r/client/parsers/metadata.rb', line 16

def initialize()
  @parser = RETS4R::Client::CompactDataParser.new
end

Instance Method Details

#parse(doc) ⇒ Object



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# File 'lib/rets4r/client/parsers/metadata.rb', line 26

def parse(doc)

  rets_resources = {}

  doc.get_elements('/RETS/*').each do |elem|

    next unless TAGS.include?(elem.name)

    columns   = elem.get_elements('COLUMNS')[0]
    rows      = elem.get_elements('DATA')

    data = @parser.parse_data(columns, rows)

    resource_id = elem.attributes['Resource']

    case elem.name
      when 'METADATA-RESOURCE'
        data.each do |resource_info|
          id = resource_info.delete('ResourceID')
          rets_resources[id] = resource_info
        end

      when 'METADATA-CLASS'
        data.each do |class_info|
          class_name = class_info.delete('ClassName')
          rets_resources[resource_id][:classes] ||= {}
          rets_resources[resource_id][:classes][class_name] = class_info
        end

      when 'METADATA-TABLE'
        class_name = elem.attributes['Class']
        data.each do |table_info|
          system_name = table_info.delete('SystemName')
          rets_resources[resource_id][:classes][class_name][:tables] ||= {}
          rets_resources[resource_id][:classes][class_name][:tables][system_name] = table_info
        end

      when 'METADATA-OBJECT'
        data.each do |object_info|
          object_type = object_info.delete('ObjectType')
          rets_resources[resource_id][:objects] ||= {}
          rets_resources[resource_id][:objects][object_type] = object_info
        end

      when 'METADATA-LOOKUP'
        data.each do |lookup_info|
          lookup_name = lookup_info.delete('LookupName')
          rets_resources[resource_id][:lookups] ||= {}
          rets_resources[resource_id][:lookups][lookup_name] = lookup_info
        end

      when 'METADATA-LOOKUP_TYPE'
        lookup = elem.attributes['Lookup']
        rets_resources[resource_id][:lookup_types] ||= {}
        rets_resources[resource_id][:lookup_types][lookup] = {}
        data.each do |lookup_type_info|
          value = lookup_type_info.delete('Value')
          rets_resources[resource_id][:lookup_types][lookup][value] = lookup_type_info
        end
    end
  end

  rets_resources
end

#parse_file(file = 'metadata.xml') ⇒ Object



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# File 'lib/rets4r/client/parsers/metadata.rb', line 20

def parse_file(file = 'metadata.xml')
  xml = File.read(file)
  doc = REXML::Document.new(xml)
  parse(doc)
end