If validating, only return valid triples from N-Triples reader.

Author: gkellogg

lib/rdf/ntriples/reader.rb

@@ -230,7 +230,9 @@ def read_triple
             if validate? && !read_eos
               log_error("Expected end of statement (found: #{current_line.inspect})", lineno: lineno, exception: RDF::ReaderError)
             end
-            return [subject, predicate, object]
+            spo = [subject, predicate, object]
+            # Only return valid triples if validating
+            return spo if !validate? || spo.all?(&:valid?)
           end
         rescue RDF::ReaderError => e
           @line = line  # this allows #read_value to work

lib/rdf/reader.rb

@@ -444,7 +444,7 @@ def each_statement(&block)
         begin
           loop do
             st = read_statement
-            block.call(st)
+            block.call(st) unless st.nil?
           end
         rescue EOFError
           rewind rescue nil
@@ -481,7 +481,7 @@ def each_triple(&block)
         begin
           loop do
             triple = read_triple
-            block.call(*triple)
+            block.call(*triple) unless triple.nil?
           end
         rescue EOFError
           rewind rescue nil