/ 
RDF-Core-0.51
River stage one • 5 direct dependents • 7 total dependents
/ RDF::Core::Enumerator

NAME

RDF::Core::Enumerator - an object that provides access to a set of statements

SYNOPSIS

#print content of a model
my $enumerator = $model->getStmts;
my $statement = $enumerator->getFirst;
while (defined $statement) {
  print $statement->getLabel."\n";
  $statement = $enumerator->getNext
}
$enumerator->close;

DESCRIPTION

A set of statements (such as returned by $model->getStmts) is represented by some descendant of RDF::Core::Enumerator. Statements can be accessed by calling getNext method repeatedly until it returns undef, which means there are no more statements to get.

Interface

  • new

    Constructors differ for different implementations of Enumerator, see RDF::Core::Enumerator::Memory, RDF::Core::Enumerator::DB_File, RDF::Core::Enumerator::Postgres

  • getFirst

    Returns first statement in Enumerator, resets all preceding getNext calls. Returns undef if there is no statement.

  • getNext

    Returns next statement or undef if there are no more statements.

  • close

    Releases memory, disk, database cursor or whatever it used to provide the data.

AUTHOR

Ginger Alliance, rdf@gingerall.cz

SEE ALSO

RDF::Core::Enumerator::Memory, RDF::Core::Enumerator::DB_File, RDF::Core::Enumerator::Postgres