class Grom::Reader
Reads n-triple data and passes it to a Grom::Builder
instance to create objects
@since 0.1.0 @attr_reader [String] data n-triple data. @attr_reader [Hash] statements_by_subject
statements grouped by subject. @attr_reader [Hash] edges_by_subject
subjects connected to objects which are uris via their predicates. @attr_reader [Array] objects Grom::Node
objects generated from n-triple data.
Attributes
data[R]
edges_by_subject[R]
objects[R]
statements_by_subject[R]
Public Class Methods
new(data, decorators = nil)
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@param [String] data n-triple data. @param [Module] decorators decorators to use when building Grom::Node
objects.
# File lib/grom/reader.rb, line 14 def initialize(data, decorators = nil) @data = data read_data @objects = Grom::Builder.new(self, decorators).objects end
Public Instance Methods
read_data()
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Reads the n-triple data and separates the statements by subject.
@return [Grom::Reader] an instance of self.
# File lib/grom/reader.rb, line 25 def read_data @statements_by_subject = {} @edges_by_subject = {} RDF::NTriples::Reader.new(@data) do |reader| reader.each_statement do |statement| subject = statement.subject.to_s Grom::Helper.lazy_array_insert(@statements_by_subject, subject, statement) predicate = statement.predicate.to_s object_is_possible_link = statement.object.uri? || statement.object.is_a?(RDF::Node) predicate_is_not_a_type_definition = predicate != RDF.type.to_s if object_is_possible_link && predicate_is_not_a_type_definition predicate = Grom::Helper.get_id(predicate) @edges_by_subject[subject] ||= {} @edges_by_subject[subject][predicate] ||= [] @edges_by_subject[subject][predicate] << statement.object.to_s end end end self end