Class: IqRdf::BlankNode

Inherits:
Node
  • Object
show all
Defined in:
lib/iq_rdf/blank_node.rb

Instance Attribute Summary collapse

Attributes inherited from Node

#lang, #nodes

Instance Method Summary collapse

Methods inherited from Node

#<<, #build_full_uri_predicate, #is_subject?, #method_missing, #xml_lang

Constructor Details

#initialize(node_id = nil) ⇒ BlankNode

Returns a new instance of BlankNode.



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# File 'lib/iq_rdf/blank_node.rb', line 20

def initialize(node_id = nil)
  super
  @node_id = node_id
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class IqRdf::Node

Instance Attribute Details

#node_id ⇒ Object (readonly)

Returns the value of attribute node_id.



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# File 'lib/iq_rdf/blank_node.rb', line 18

def node_id
  @node_id
end

Instance Method Details

#build_predicate(*args, &block) ⇒ Object 



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# File 'lib/iq_rdf/blank_node.rb', line 39

def build_predicate(*args, &block)
  IqRdf::PredicateNamespace.new(self, IqRdf::Default).build_predicate(*args, &block)
end

#build_predicate_with_ns(namespace, *args, &block) ⇒ Object 



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# File 'lib/iq_rdf/blank_node.rb', line 43

def build_predicate_with_ns(namespace, *args, &block)
  IqRdf::PredicateNamespace.new(self, namespace).build_predicate(*args, &block)
end

#build_xml(xml, &block) ⇒ Object 



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# File 'lib/iq_rdf/blank_node.rb', line 47

def build_xml(xml, &block)
  block.call({}, lambda {
      attrs = {}
      attrs["xml:lang"] = self.lang if self.lang
      xml.rdf(:Description, attrs) do
        self.nodes.each do |predicate|
          predicate.build_xml(xml)
        end
      end
    })
end

#to_s(options = {}) ⇒ Object 



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# File 'lib/iq_rdf/blank_node.rb', line 29

def to_s(options = {})
  base_indent = options[:indent] || ""
  predicate_indent =  base_indent + "".ljust(4)

  predicates = nodes.map { |p| format_predicate(p, indent: predicate_indent, lang: options[:lang]) }
       .join(";\n")

  "[\n#{predicates}\n#{base_indent} ]"
end

#to_turtle(parent_lang = nil) ⇒ Object 



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# File 'lib/iq_rdf/blank_node.rb', line 25

def to_turtle(parent_lang = nil)

end