phpman > perldoc > RDF::Redland::Iterator(3pm)

NAME
    RDF::Redland::Iterator - Redland RDF Iterator Class

SYNOPSIS
      use RDF::Redland;

      ...
      my $iterator=$model->targets_iterator($source_node, $arc_node);
      while($iterator && !$iterator->end) {
        my $node=$iterator->current;
        ...
        $iterator->next;
      }

DESCRIPTION
    This class is used to return lists of RDF::Redland::Node objects from a method that returns an
    RDF::Redland::Iterator - commonly one of the get_sources_iterator, get_targets_iterator or
    get_arcs_iterator methods of the RDF::Redland::Model class.

    This allows efficient retrieval of long lists of RDF::Redland::Node objects but isn't really
    very Perl-friendly. The get_sources, get_targets or get_arcs methods of RDF::Redland::Model
    class return Perl lists and the get_source, get_target and get_arc methods return single
    arbitrary results.

CONSTRUCTORS
    No public constructors - are created and returned from various methods of classes including
    RDF::Redland::Model

METHODS
    end Return non 0 if the iterator has finished

    current
        Returns the current RDF::Redland::Node object from the iteration or undef if the iteration
        is finished.

    next
        Moves the iterator to the next item, returns undef if the iteration is finished.

    context
        Returns the context RDF::Redland::Node object from the iteration or undef if the iteration
        is finished.

SEE ALSO
    RDF::Redland::Model and RDF::Redland::Node

AUTHOR
    Dave Beckett - http://www.dajobe.org/