package Tie::DeepTied;
require Tie::Hash;
# $Id: DeepTied.pm 1049 2003-12-08 21:10:33Z jonasbn $
use strict qw(vars subs);
use warnings;
use vars qw(@ISA $VERSION);
$VERSION = '1.08';
@ISA = qw(Tie::Hash);
sub TIEHASH {
my ($class, $obj, $ind) = @_;
my $this = {};
bless $this, $class;
$this->{'__obj'} = $obj;
$this->{'__index'} = $ind;
my $cell = $obj->FETCH($ind);
$this->{'__storage'} = {%$cell};
$this;
}
sub STORE {
my ($this, $key, $value) = @_;
$this->{'__last'} = time;
$this->{'__storage'}->{$key} = $value;
$this->{'__obj'}->STORE($this->{'__index'}, $this->{'__storage'});
if (UNIVERSAL::isa($value, 'HASH')) {
unless (tied(%$value)) {
my %hash = %$value;
tie %$value, 'Tie::StdHash', $this, $key; # Prevent infinite loop!
%$value = %hash;
tie %$value, 'Tie::DeepTied', $this, $key;
}
}
}
sub FETCH {
my ($this, $key) = @_;
my $value = $this->{'__storage'}->{$key};
if (UNIVERSAL::isa($value, 'HASH')) {
unless (tied(%$value)) {
my %hash = %$value;
tie %$value, 'Tie::StdHash', $this, $key; # Prevent infinite loop!
%$value = %hash;
tie %$value, 'Tie::DeepTied', $this, $key;
}
}
$value;
}
sub DELETE {
my ($this, $key) = @_;
delete $this->{'__storage'}->{$key};
}
sub EXISTS {
my ($this, $key) = @_;
exists($this->{'__storage'}->{$key});
}
sub CLEAR {
my $this = shift;
$this->{'__storage'} = {};
}
sub FIRSTKEY {
my $this = shift;
my $a = scalar keys %{$this->{'__storage'}};
each %{$this->{'__storage'}};
}
sub NEXTKEY {
my $this = shift;
each %{$this->{'__storage'}};
}
1;