CAD::Drawing::IO::Split - Fast distributed text file methods.
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NAME
CAD::Drawing::IO::Split - Fast distributed text file methods.
AUTHOR
Eric L. Wilhelm <ewilhelm at cpan dot org>
http://scratchcomputing.com
COPYRIGHT
This module is copyright (C) 2004-2006 by Eric L. Wilhelm. Portions
copyright (C) 2003 by Eric L. Wilhelm and A. Zahner Co.
LICENSE
This module is distributed under the same terms as Perl. See the Perl
source package for details.
You may use this software under one of the following licenses:
(1) GNU General Public License
(found at http://www.gnu.org/copyleft/gpl.html)
(2) Artistic License
(found at http://www.perl.com/pub/language/misc/Artistic.html)
NO WARRANTY
This software is distributed with ABSOLUTELY NO WARRANTY. The author,
his former employer, and any other contributors will in no way be held
liable for any loss or damages resulting from its use.
Modifications
The source code of this module is made freely available and
distributable under the GPL or Artistic License. Modifications to and
use of this software must adhere to one of these licenses. Changes to
the code should be noted as such and this notification (as well as the
above copyright information) must remain intact on all copies of the
code.
Additionally, while the author is actively developing this code,
notification of any intended changes or extensions would be most helpful
in avoiding repeated work for all parties involved. Please contact the
author with any such development plans.
SEE ALSO
CAD::Drawing
CAD::Drawing::IO
Requisite Plug-in Functions
See CAD::Drawing::IO for a description of the plug-in architecture.
check_type
Returns true if $type is "split" or $filename is a directory (need a tag?)
$fact = check_type($filename, $type);
Load/Save Methods
Concept here is to strip data down to the absolute bare minumum in an
effort to find a generic and extensible incarnation of same.
save
Saves data into $toplevel_directory under a directory for each layer,
each type, and a file for each id.
save($drw, $toplevel_directory, \%options);
Requires that the directory already exists.
Selective saves not yet supported.
Unfortunately, the file-formats are rather primitive and the code needs
refactoring. These are nowhere near stable, so don't expect version
compatibility yet!
Needs a clear_all_like => $regex option.
load
load($drw, $toplevel_directory, \%options);
%options may include selective-load arguments
Naming Functions
_dir_list
_sp_filename
Creates nested directories which are required to save %obj and returns the filename which should be saved into.
_sp_filename(\%obj, \%data);
Inherited Methods
clear_dir
Removes layers (and items) from the split directory $dir.
Defaults to removing all.
$drw->clear_dir($dir, \%options);
- Available options:
-
like => qr/regex/, # if regex matches layer name
not_like => qr/regex/, # negative of above (compounded)
- check_select() options:
-
%options is passed through CAD::Drawing::Defined::check_select(), so the selections returned by it will be utilized here.
select_layers => \@layer_list,
select_types => \@types_list,
Returns the number of items removed or undef() if $dir does not exist.
package CAD::Drawing::IO::Split;
our $VERSION = '0.02';
use CAD::Drawing;
use CAD::Drawing::Defined;
use warnings;
use strict;
use Carp;
my $dbg = 0;
########################################################################
########################################################################
# the following are required to be a disc I/O plugin:
our $can_save_type = "split";
our $can_load_type = $can_save_type;
our $is_inherited = 1;
sub check_type {
my ($filename, $type) = @_;
if(defined($type)) {
($type eq "split") && return("split");
return();
}
elsif((-d $filename) && (0)) { # FIXME: this needs something
return("split");
}
elsif(($filename =~ s/^split://) and (-d $filename)) {
return("split");
}
return();
} # end subroutine check_type definition
########################################################################
########################################################################
our %save_functions = (
plines => sub {
my ($pline, $data) = @_;
# note the danger here (loading dwg into existing will
# create compounding buildup
my $filename = _sp_filename($pline, $data);
open(PL, ">$filename") or croak();
print PL join(":", map({join(",", @$_)} @{$pline->{pts}})), "\n";
print PL "$pline->{color}\n";
close(PL);
}, # end plines sub
lines => sub {
my ($line, $data) = @_;
$dbg && print "a line!\n";
my $filename = _sp_filename($line, $data);
open(LN, ">$filename") or croak();
print LN join(":", map({join(",", @$_)} @{$line->{pts}})), "\n";
print LN "$line->{color}\n";
close(LN);
},
points => sub {
my ($point, $data) = @_;
# print "a point\n";
my $filename = _sp_filename($point, $data);
open(PT, ">$filename") or croak();
print PT join(",", @{$point->{pt}}), "\n";
print PT "$point->{color}\n";
close(PT);
}, # end points sub
circles => sub {
my ($circ, $data) = @_;
my $filename = _sp_filename($circ, $data);
open(CI, ">$filename") or croak();
$dbg && print "saving @{$circ->{pt}}\n$circ->{rad}\n$circ->{color}\n";
print CI join(",", @{$circ->{pt}}), "\n";
print CI "$circ->{rad}\n";
print CI "$circ->{color}\n";
close(CI);
}, # end circs sub
); # end %save_functions
########################################################################
sub save{
my $dbg = 0;
my $self = shift;
$dbg && print "here\n";
my ($dir, $opt) = @_;
$dir =~ s/^split://;
(-d $dir) or die "no $dir\n";
my %data = (
dir => $dir,
);
$dbg && print "saving out $dir\n";
$self->outloop(\%save_functions, \%data);
} # end subroutine save definition
########################################################################
our %load_functions = (
plines => sub {
my ($self, $file, $info) = @_;
open(PL, $file) or croak();
chomp(my $pts = <PL>);
chomp(my $color = <PL>);
close(PL);
$dbg && print "points: $pts\ncolor:$color\n";
my @pts = map({[split(/,/, $_)]} split(/:/, $pts));
$self->addpolygon(\@pts, {%$info, color => $color});
},
lines => sub {
my ($self, $file, $info) = @_;
open(LN, $file) or croak();
chomp(my $pts = <LN>);
chomp(my $color = <LN>);
close(LN);
$dbg && print "points: $pts\ncolor:$color\n";
my @pts = map({[split(/,/, $_)]} split(/:/, $pts));
$self->addline(\@pts, {%$info, color => $color});
},
points => sub {
my ($self, $file, $info) = @_;
open(PT, $file) or croak();
chomp(my $pt = <PT>);
chomp(my $co = <PT>);
close(PT);
$self->addpoint([split(/,/, $pt)], {%$info, color => $co});
},
circles => sub {
my ($self, $file, $info) = @_;
open(CI, $file) or croak();
chomp(my $pt = <CI>);
chomp(my $rad = <CI>);
chomp(my $co = <CI>);
close(CI);
$self->addcircle([split(/,/, $pt)], $rad, {%$info, color => $co});
},
);
sub load{
my $self = shift;
my ($dir, $opts) = @_;
$dir =~ s/^split://;
(-d $dir) or croak("no such directory: $dir\n");
my %opt;
(ref($opts) eq "HASH") && (%opt = %$opts);
my @layers;
my ($s, $n) = check_select(\%opt);
if($s->{l}) {
@layers = grep({$s->{l}{$_}} _dir_list($dir));
}
else {
@layers = _dir_list($dir);
}
foreach my $layer (@layers) {
my %info = (layer => $layer);
foreach my $type (keys(%load_functions)) {
$s->{t} && ($s->{t}{$type} || next);
$n->{t} && ($n->{t}{$type} && next);
my $path = join("/", $dir, $layer, $type);
(-d $path) || next;
$info{type} = $type;
my @ids = _dir_list($path);
foreach my $id (@ids) {
$info{id} = $id;
my $filename = $path . "/" . $id;
# hmm. slipping select color / select linetype in here
# is tricky
$load_functions{$type}->($self, $filename, {%info});
}
} # end foreach $type
} # end foreach $layer
} # end subroutine load definition
########################################################################
sub _dir_list {
my $dir = shift;
opendir(DIR, $dir);
my @list = grep(! /^\.+$/, readdir(DIR));
closedir(DIR);
# print "listed @list\n";exit;
return(@list);
} # end subroutine _dir_list definition
########################################################################
sub _sp_filename {
my ($obj, $data) = @_;
my @dirs = (
$data->{dir},
$obj->{addr}{layer},
$obj->{addr}{type},
);
my $filename;
foreach my $dir (@dirs) {
$filename .= $dir . "/";
if(-d $filename) {
$dbg && print "$filename exists\n";
next;
}
(-e $filename) and
croak("$filename exists, but is not a directory");
$dbg && print "making $filename\n";
mkdir($filename);
}
$filename .= $obj->{addr}{id};
$dbg && print "filename to be $filename\n";#exit;
return($filename);
} # end subroutine _sp_filename definition
########################################################################
sub clear_dir {
my $self = shift;
my ($dir, $opts) = @_;
$dir =~ s#/*$#/#;
my %opt;
(ref($opts) eq "HASH") && (%opt = %$opts);
my $like = $opt{like};
my $notlike = $opt{not_like};
my ($s, $n) = check_select(\%opt);
(-d $dir) or return();
my @kill_layers = _dir_list($dir);
if($like) {
(ref($like) eq "Regexp") or
croak("$like is not a regex");
@kill_layers = grep(/$like/, @kill_layers);
$dbg && print "now ", scalar(@kill_layers), "\n";
}
if($notlike) {
(ref($notlike) eq "Regexp") or
croak("$notlike is not a regex");
@kill_layers = grep(! /$notlike/, @kill_layers);
$dbg && print "now ", scalar(@kill_layers), "\n";
}
my $count;
foreach my $layer (@kill_layers) {
$s->{l} && ($s->{l}{$layer} || next);
$n->{l} && ($n->{l}{$layer} && next);
my $ldir = $dir . $layer . "/";
my @types = _dir_list($ldir);
$dbg && print "removing $layer\n";
my $tfail = 0;
foreach my $type (@types) {
$s->{t} && ($s->{t}{$type} || next);
$n->{t} && ($n->{t}{$type} && next);
$dbg && print "$type\n";
my $tdir = $ldir . $type . "/";
my @items = _dir_list($tdir);
$dbg && print "items: @items\n";
my $ifail = 0;
foreach my $item (@items) {
my $file = $tdir . $item;
if(unlink($file)) {
$count ++;
}
else {
carp("unlink failed on $file");
$ifail++;
}
}
unless($ifail) {
unless(rmdir($tdir)) {
carp("rmdir failed on $tdir");
$tfail++;
}
}
} # end foreach $type
unless($tfail) {
unless(rmdir($ldir)) {
carp("rmdir failed on $ldir");
}
}
}
return($count);
} # end subroutine clear_dir definition
########################################################################
1;