Module: Google::APIClient::Schema

Defined in:
lib/google/api_client/discovery/schema.rb

Class Method Summary collapse

Class Method Details

.parse(api, schema_data) ⇒ Object 



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# File 'lib/google/api_client/discovery/schema.rb', line 31

def self.parse(api, schema_data)
  # This method is super-long, but hard to break up due to the
  # unavoidable dependence on closures and execution context.
  schema_name = schema_data['id']

  # Due to an oversight, schema IDs may not be URI references.
  # TODO(bobaman): Remove this code once this has been resolved.
  schema_uri = (
    api.document_base +
    (schema_name[0..0] != '#' ? '#' + schema_name : schema_name)
  )
  # puts schema_uri

  # Due to an oversight, schema IDs may not be URI references.
  # TODO(bobaman): Remove this whole lambda once this has been resolved.
  reformat_references = lambda do |data|
    # This code is not particularly efficient due to recursive traversal
    # and excess object creation, but this hopefully shouldn't be an
    # issue since it should only be called only once per schema per
    # process.
    if data.kind_of?(Hash) &&
        data['$ref'] && !data['$ref'].kind_of?(Hash)
      if data['$ref'].respond_to?(:to_str)
        reference = data['$ref'].to_str
      else
        raise TypeError, "Expected String, got #{data['$ref'].class}"
      end
      reference = '#' + reference if reference[0..0] != '#'
      data.merge({
        '$ref' => reference
      })
    elsif data.kind_of?(Hash)
      data.inject({}) do |accu, (key, value)|
        if value.kind_of?(Hash)
          accu[key] = reformat_references.call(value)
        else
          accu[key] = value
        end
        accu
      end
    else
      data
    end
  end
  schema_data = reformat_references.call(schema_data)
  # puts schema_data.inspect

  if schema_name
    api_name_string =
      Google::INFLECTOR.camelize(api.name)
    api_version_string =
      Google::INFLECTOR.camelize(api.version).gsub('.', '_')
    # This is for compatibility with Ruby 1.8.7.
    # TODO(bobaman) Remove this when we eventually stop supporting 1.8.7.
    args = []
    args << false if Class.method(:const_defined?).arity != 1
    if Google::APIClient::Schema.const_defined?(api_name_string, *args)
      api_name = Google::APIClient::Schema.const_get(
        api_name_string, *args
      )
    else
      api_name = Google::APIClient::Schema.const_set(
        api_name_string, Module.new
      )
    end
    if api_name.const_defined?(api_version_string, *args)
      api_version = api_name.const_get(api_version_string, *args)
    else
      api_version = api_name.const_set(api_version_string, Module.new)
    end
    if api_version.const_defined?(schema_name, *args)
      schema_class = api_version.const_get(schema_name, *args)
    end
  end

  # It's possible the schema has already been defined. If so, don't
  # redefine it. This means that reloading a schema which has already
  # been loaded into memory is not possible.
  unless schema_class
    schema_class = AutoParse.generate(schema_data, :uri => schema_uri)
    if schema_name
      api_version.const_set(schema_name, schema_class)
    end
  end
  return schema_class
end