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|
package Graph::GEXF::Role::XML;
use Moose::Role;
use XML::Simple;
has gexf_ns => (
is => 'ro',
isa => 'Str',
default => 'http://www.gexf.net/1.2draft'
);
has gexf_version => (
is => 'ro',
isa => 'Num',
default => '1.2'
);
sub to_xml {
my $self = shift;
my $graph = $self->_init_graph();
foreach (qw/node edge/) {
$self->_add_attributes( $graph, $_ );
}
$self->_add_nodes($graph);
my $xml_out = XMLout($graph, AttrIndent => 1, keepRoot => 1);
$xml_out;
}
sub _add_attributes {
my ($self, $graph, $type) = @_;
my $list_attr = 'attributes_' . $type . '_list';
my $get_attr = 'get_' . $type . '_attribute';
my $attributes;
$attributes->{class} = $type;
foreach my $attr_id ($self->$list_attr) {
my $attribute = $self->$get_attr($attr_id);
push @{$attributes->{attribute}},
{ id => $attribute->{id},
type => $attribute->{type},
title => $attribute->{title},
default => $attribute->{default},
};
}
push @{$graph->{gexf}->{graph}->{attributes}}, $attributes;
}
sub _init_graph {
my $self = shift;
# XXX this need some refactoring
return {
gexf => {
xmlns => $self->gexf_ns,
version => $self->gexf_version,
meta => {creator => ['Graph::GEXF']},
graph => {
mode => $self->graph_mode,
defaultedgetype => $self->edge_type,
}
}
};
}
sub _add_nodes {
my ( $self, $graph ) = @_;
my $edges_id = 0;
foreach my $node_id ( $self->all_nodes ) {
my $node = $self->get_node($node_id);
my ( $node_desc, $edges ) = $self->_create_node($node);
push @{ $graph->{gexf}->{graph}->{nodes}->{node} }, $node_desc;
foreach my $edge (@$edges) {
push @{ $graph->{gexf}->{graph}->{edges}->{edge} }, $edge;
}
}
}
sub _create_node {
my ( $self, $node ) = @_;
my $label = $node->label || $node->id;
my $node_desc = { id => $node->id, label => $label };
foreach my $attr_id ( $node->attributes_node_list ) {
my $attr = $node->get_node_attribute($attr_id);
push @{ $node_desc->{attvalues}->{attvalue} },
{ for => $attr->{id}, value => $attr->{value} };
}
$self->_add_visualizations_elements($node, $node_desc);
my @edges =
map { $self->_create_edge( $node->get_edge($_) ) } $node->all_edges;
return ($node_desc, \@edges);
}
sub _create_edge {
my ( $self, $edge ) = @_;
my $edge_desc = {
id => $edge->id,
source => $edge->source,
target => $edge->target,
weight => $edge->weight,
};
$self->_add_shape($edge, $edge_desc);
return $edge_desc;
}
sub _add_visualizations_elements {
my ( $self, $node, $node_desc ) = @_;
return unless $self->has_visualization;
foreach (qw/colors size shape position/){
my $method = "_add_$_";
$self->$method($node, $node_desc);
}
}
sub _add_colors {
my ( $self, $element, $element_desc ) = @_;
return unless $element->has_colors;
push @{ $element_desc->{'viz:color'} },
$self->_add_viz_elements( $element, qw/r g b a/ );
}
sub _add_size {
my ($self, $element, $element_desc) = @_;
push @{$element_desc->{'viz:size'}}, {value => $element->size};
}
sub _add_shape {
my ($self, $element, $element_desc) = @_;
push @{$element_desc->{'viz:shape'}}, {value => $element->shape};
}
sub _add_position {
my ($self, $element, $element_desc) = @_;
return unless $element->has_position;
push @{ $element_desc->{'viz:position'} },
$self->_add_viz_elements( $element, qw/x y z/ );
}
sub _add_viz_elements {
my ( $self, $element, @attrs ) = @_;
my %hash = map { $_ => $element->$_ } @attrs;
\%hash;
}
no Moose::Role;
1;
|
