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.\" ========================================================================
.\"
.IX Title "RDF::Trine::Iterator::Graph 3pm"
.TH RDF::Trine::Iterator::Graph 3pm "2014-10-24" "perl v5.20.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
RDF::Trine::Iterator::Graph \- Iterator class for graph query results
.SH "VERSION"
.IX Header "VERSION"
This document describes RDF::Trine::Iterator::Graph version 1.011
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& use RDF::Trine::Iterator::Graph;
\& 
\& my $iterator = RDF::Trine::Iterator::Graph\->new( \e&data );
\& while (my $st = $iterator\->next) {
\&   # $st is a RDF::Trine::Statement object
\&   print $st\->as_string;
\& }
.Ve
.SH "METHODS"
.IX Header "METHODS"
Beyond the methods documented below, this class inherits methods from the
RDF::Trine::Iterator class.
.ie n .IP """new ( \e@results, %args )""" 4
.el .IP "\f(CWnew ( \e@results, %args )\fR" 4
.IX Item "new ( @results, %args )"
.PD 0
.ie n .IP """new ( \e&results, %args )""" 4
.el .IP "\f(CWnew ( \e&results, %args )\fR" 4
.IX Item "new ( &results, %args )"
.PD
Returns a new \s-1SPARQL\s0 Result interator object. Results must be either
an reference to an array containing results or a \s-1CODE\s0 reference that
acts as an iterator, returning successive items when called, and
returning undef when the iterator is exhausted.
.Sp
\&\f(CW$type\fR should be one of: bindings, boolean, graph.
.ie n .IP """as_bindings ( $s, $p, $o )""" 4
.el .IP "\f(CWas_bindings ( $s, $p, $o )\fR" 4
.IX Item "as_bindings ( $s, $p, $o )"
Returns the iterator as a Bindings iterator, using the supplied triple nodes to
determine the variable bindings.
.ie n .IP """materialize""" 4
.el .IP "\f(CWmaterialize\fR" 4
.IX Item "materialize"
Returns a materialized version of the current graph iterator.
The materialization process will leave this iterator empty. The materialized
iterator that is returned should be used for any future need for the iterator's
data.
.ie n .IP """unique""" 4
.el .IP "\f(CWunique\fR" 4
.IX Item "unique"
Returns a Graph iterator that ensures the returned statements are unique. While
the underlying \s-1RDF\s0 graph is the same regardless of uniqueness, the iterator's
serialization methods assume the results are unique, and so use this method
before serialization.
.Sp
Uniqueness is opt-in for efficiency concerns \*(-- this method requires O(n) memory,
and so may have noticeable effects on large graphs.
.ie n .IP """is_graph""" 4
.el .IP "\f(CWis_graph\fR" 4
.IX Item "is_graph"
Returns true if the underlying result is an \s-1RDF\s0 graph.
.ie n .IP """as_string ( $max_size [, \e$count] )""" 4
.el .IP "\f(CWas_string ( $max_size [, \e$count] )\fR" 4
.IX Item "as_string ( $max_size [, $count] )"
Returns a string table serialization of the stream data.
.ie n .IP """as_xml ( $max_size )""" 4
.el .IP "\f(CWas_xml ( $max_size )\fR" 4
.IX Item "as_xml ( $max_size )"
Returns an \s-1XML\s0 serialization of the stream data.
.ie n .IP """print_xml ( $fh, $max_size )""" 4
.el .IP "\f(CWprint_xml ( $fh, $max_size )\fR" 4
.IX Item "print_xml ( $fh, $max_size )"
Prints an \s-1XML\s0 serialization of the stream data to the filehandle \f(CW$fh\fR.
.ie n .IP """as_json ( $max_size )""" 4
.el .IP "\f(CWas_json ( $max_size )\fR" 4
.IX Item "as_json ( $max_size )"
Returns a \s-1JSON\s0 serialization of the stream data.
.ie n .IP """as_hashref""" 4
.el .IP "\f(CWas_hashref\fR" 4
.IX Item "as_hashref"
Returns a hashref representing the model in an RDF/JSON\-like manner.
.Sp
See \f(CW\*(C`as_hashref\*(C'\fR at RDF::Trine::Model for full documentation of the
hashref format.
.ie n .IP """construct_args""" 4
.el .IP "\f(CWconstruct_args\fR" 4
.IX Item "construct_args"
Returns the arguments necessary to pass to the stream constructor _new
to re-create this stream (assuming the same closure as the first
.SH "DEPENDENCIES"
.IX Header "DEPENDENCIES"
\&\s-1JSON\s0
.PP
Scalar::Util
.SH "BUGS"
.IX Header "BUGS"
Please report any bugs or feature requests to through the GitHub web interface
at <https://github.com/kasei/perlrdf/issues>.
.SH "AUTHOR"
.IX Header "AUTHOR"
Gregory Todd Williams  \f(CW\*(C`<gwilliams@cpan.org>\*(C'\fR
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
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.