2 # Hash tied to record all the accessed keys.
3 # Copyright (C) 2005 Jan Kratochvil <project-www.jankratochvil.net@jankratochvil.net>
5 # This program is free software; you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; exactly version 2 of June 1991 is required
9 # This program is distributed in the hope that it will be useful,
10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 # GNU General Public License for more details.
14 # You should have received a copy of the GNU General Public License
15 # along with this program; if not, write to the Free Software
16 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 package My::Hash::RecordKeys;
20 our $VERSION=do { my @r=(q$Revision$=~/\d+/g); sprintf "%d.".("%03d"x$#r),@r; };
24 use My::Web; # for &Wrequire
26 our @ISA=qw(My::Hash);
27 use Carp qw(cluck confess);
32 my($class,$parent)=@_;
34 my $self=$class->SUPER::TIEHASH($parent);
35 $self->{"keyshash"}={};
39 # Call as: my @accessed=tied(%$ref)->accessed();
44 return sort keys(%{$self->{"keyshash"}})
49 my($this,$key,$value)=@_;
51 $this->{"keyshash"}{$key}=1;
52 return $this->pass("STORE",$key,$value);
59 $this->{"keyshash"}{$key}=1;
60 return $this->pass("FETCH",$key);
67 my $a=keys(%{$this->{"parent"}});
68 return $this->NEXTKEY($this,undef());
73 my($this,$lastkey)=@_;
75 cluck "TODO: Enumeration may not be expected.";
77 my $key=each(%{$this->{"parent"}});
78 return if !defined $key;
79 $this->{"keyshash"}{$key}=1;
88 $this->{"keyshash"}{$key}=1;
89 return $this->pass("EXISTS",$key);
96 $this->{"keyshash"}{$key}=1;
97 return $this->pass("DELETE",$key);
104 confess "TODO: Not implementable.";
111 confess "TODO: Not yet implemented.";