Initial mod_perl-2.0 port.

[MyWeb.git] / Hash / Sub / Readonly.pm

diff --git a/Hash/Sub/Readonly.pm b/Hash/Sub/Readonly.pm
new file mode 100644 (file)
index 0000000..ad829a9
--- /dev/null
+++ b/Hash/Sub/Readonly.pm
@@ -0,0 +1,46 @@
+# $Id$
+# Hash tied to optionally dynamically generate its values and being locked/readonly
+# Copyright (C) 2005 Jan Kratochvil <project-www.jankratochvil.net@jankratochvil.net>
+# 
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; exactly version 2 of June 1991 is required
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+
+package My::Hash::Sub::Readonly;
+our $VERSION=do { my @r=(q$Revision$=~/\d+/g); sprintf "%d.".("%03d"x$#r),@r; };
+our $CVS_ID=q$Id$;
+use strict;
+use warnings;
+
+use My::Web;   # for &Wrequire
+use Carp qw(cluck confess);
+
+Wrequire 'My::Hash::Sub';
+our @ISA=qw(My::Hash::Sub);
+
+
+# Implementation reason: &Hash::Util::lock_hash does not work for tied hashes!
+
+
+sub TIEHASH($@)
+{
+my($class,@list)=@_;
+
+       return bless {@list},$class;
+}
+
+sub STORE  { confess "READ-ONLY requirement violation"; }
+sub DELETE { confess "READ-ONLY requirement violation"; }
+sub CLEAR  { confess "READ-ONLY requirement violation"; }
+
+1;