Provided by: librdf-trine-perl_1.019-2_all bug


       RDF::Trine::Iterator::Boolean - Iterator class for boolean query results


       This document describes RDF::Trine::Iterator::Boolean version 1.019


        use RDF::Trine::Iterator::Boolean;

        my $iterator = RDF::Trine::Iterator::Boolean->new( [1] );
        my $bool = $iterator->get_boolean;
        if ($bool) {
               print "Yes.\n";


       Beyond the methods documented below, this class inherits methods from the
       RDF::Trine::Iterator class.

       "new ( \@results, %args )"
       "new ( \&results, %args )"
           Returns a new SPARQL Result interator object. Results must be either an reference to
           an array containing results or a CODE reference that acts as an iterator, returning
           successive items when called, and returning undef when the iterator is exhausted.

           $type should be one of: bindings, boolean, graph.

           Returns true if the underlying result is a boolean value.

       "as_string ( $max_size [, \$count] )"
           Returns a string serialization of the stream data.

       "as_xml ( $max_size )"
           Returns an XML serialization of the stream data.

       "print_xml ( $fh, $max_size )"
           Prints an XML serialization of the stream data to the filehandle $fh.

       "as_json ( $max_size )"
           Returns a JSON serialization of the stream data.

           Returns the arguments necessary to pass to the stream constructor _new to re-create
           this stream (assuming the same closure as the first





       Please report any bugs or feature requests to through the GitHub web interface at


       Gregory Todd Williams  "<>"


       Copyright (c) 2006-2012 Gregory Todd Williams. This program is free software; you can
       redistribute it and/or modify it under the same terms as Perl itself.