File Coverage

blib/lib/Class/MakeMethods/Emulator.pm

Criterion	Covered	Total	%
statement	43	59	72.8
branch	10	16	62.5
condition	4	7	57.1
subroutine	6	7	85.7
pod	0	2	0.0
total	63	91	69.2

package Class::MakeMethods::Emulator;

$VERSION = 1.009;

########################################################################
### IMPORT BEHAVIOR: import(), _handle_namespace()
########################################################################

@EXPORT_OK = qw( namespace_capture namespace_release );
sub import {

  if ( scalar @_ == 2 and $_[1] eq '-isasubclass' ) {
    splice @_, 1, 1;
    my $target_class = ( caller )[0];
    no strict;
    push @{"$target_class\::ISA"}, $_[0];
  }

  if ( $_[0] eq __PACKAGE__ ) {
    require Exporter and goto &Exporter::import  # lazy Exporter
  }
}

sub _handle_namespace {
  my $class = shift;
  my $emulation_target = shift;
  my $firstarg = shift or return;
  my $take = shift || '-take_namespace';
  my $release = shift || '-release_namespace';

  if ( $firstarg eq $take) {
    Class::MakeMethods::Emulator::namespace_capture($class, $emulation_target);
    return 1;
  } elsif ( $firstarg eq $release) {
    Class::MakeMethods::Emulator::namespace_release($class, $emulation_target);
    return 1;
  }
}

########################################################################
### NAMESPACE MUNGING: _namespace_capture(), _namespace_release()
########################################################################

sub namespace_capture {
  my $source_package = shift;
  my $target_package = shift;

  # warn "Mapping $source_package over $target_package \n";

  my $source_file = "$source_package.pm";
  $source_file =~ s{::}{/}g;

  my $target_file = "$target_package.pm";
  $target_file =~ s{::}{/}g;

  my $temp_package = $source_package . '::Target::' . $target_package;
  my $temp_file = "$temp_package.pm";
  $temp_file =~ s{::}{/}g;

  no strict;
  unless ( ${$temp_package . "::TargetCaptured"} ++ ) {
    *{$temp_package . "::"} = *{$target_package . "::"};
    $::INC{$temp_file} = $::INC{$target_file};
  }
  *{$target_package . "::"} = *{$source_package . "::"};
  $::INC{$target_file} = $::INC{$source_file}
}

sub namespace_release {
  my $source_package = shift;
  my $target_package = shift;

  my $target_file = "$target_package.pm";
  $target_file =~ s{::}{/}g;

  my $temp_package = $source_package . '::Target::' . $target_package;
  my $temp_file = "$temp_package.pm";
  $temp_file =~ s{::}{/}g;

  no strict;
  unless ( ${"${temp_package}::TargetCaptured"} ) {
    Carp::croak("Can't _namespace_release: -take_namespace not called yet.");
  }
  *{$target_package . "::"} = *{$temp_package. "::"};
  $::INC{$target_file} = $::INC{$temp_file};
}

########################################################################

1;

__END__