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# Copyright 2011-2016, Paul Johnson (paul@pjcj.net)
# This software is free. It is licensed under the same terms as Perl itself.
# The latest version of this software should be available from my homepage:
# http://www.pjcj.net
package Devel::Cover::DB::IO;
use strict;
use warnings;
our $VERSION = '1.23'; # VERSION
my $Format;
BEGIN {
$Format = "Sereal" if eval "use Sereal::Decoder; use Sereal::Encoder; 1";
$Format = "JSON" if !$Format and eval "use JSON; 1";
$Format = "JSON" if !$Format and eval "use JSON::PP; 1";
$Format = "Storable" if !$Format and eval "use Storable; 1";
die "Can't load either JSON or Storable" unless $Format;
}
sub new {
my $class = shift;
my $format = $ENV{DEVEL_COVER_DB_FORMAT} || $Format;
($format) = $format =~ /(.*)/; # die tainting
die "Devel::Cover: Unrecognised DB format: $format"
unless $format =~ /^(?:Storable|JSON|Sereal)$/;
$class .= "::$format";
eval "use $class; 1" or die "Devel::Cover: $@";
$class->new(options => $ENV{DEVEL_COVER_IO_OPTIONS} || "", @_)
}
1
__END__
=head1 NAME
Devel::Cover::DB::IO - IO routines for Devel::Cover::DB
=head1 VERSION
version 1.23
=head1 SYNOPSIS
use Devel::Cover::DB::IO;
my $io = Devel::Cover::DB::IO->new(format => "JSON");
my $data = $io->read($file);
$io->write($data, $file);
=head1 DESCRIPTION
This module provides IO routines for Devel::Cover::DB.
=head1 SEE ALSO
Devel::Cover
=head1 METHODS
=head2 new
my $io = Devel::Cover::DB::IO->new(format => "JSON");
Constructs the IO object.
=head2 read
my $data = $io->read($file);
Returns a perl data structure representing the data read from $file.
=head2 write
$io->write($data, $file);
Writes $data to $file in the format specified when creating $io.
=head1 BUGS
Huh?
=head1 LICENCE
Copyright 2011-2016, Paul Johnson (paul@pjcj.net)
This software is free. It is licensed under the same terms as Perl itself.
The latest version of this software should be available from my homepage:
http://www.pjcj.net
=cut
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