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# -*- perl -*- |
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# $Id: Base.pm,v 1.6 2004/10/04 19:21:10 eserte Exp $ |
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# Author: Slaven Rezic |
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# |
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# Copyright (C) 2001 Online Office Berlin. All rights reserved. |
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# Copyright (C) 2002 Slaven Rezic. |
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# This is free software; you can redistribute it and/or modify it under the |
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# terms of the GNU General Public License, see the file COPYING. |
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# |
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# Mail: slaven@rezic.de |
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# WWW: http://we-framework.sourceforge.net |
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# |
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=head1 NAME |
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WE::DB::Base - base class for all database classes |
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=head1 SYNOPSIS |
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=head1 DESCRIPTION |
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=head2 METHODS |
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=over |
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=cut |
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package WE::DB::Base; |
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use base qw(Class::Accessor); |
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__PACKAGE__->mk_accessors(qw(Root Connected)); |
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use strict; |
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use vars qw($VERSION); |
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$VERSION = sprintf("%d.%02d", q$Revision: 1.6 $ =~ /(\d+)\.(\d+)/); |
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sub new { |
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my($class) = @_; |
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my $self = {}; |
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bless $self, $class; |
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} |
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=item connect_if_necessary($sub) |
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Connect to the database, if there is not a database connection yet, |
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and execute the supplied subroutine C<$sub>. The return value of |
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C<$sub> will be returned by C. Exceptions are |
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also forwarded to the caller, but after the connection is closed, if |
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needed. |
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=cut |
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sub connect_if_necessary { |
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my($self, $sub) = @_; |
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my $connected = $self->Connected; |
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my $do_disconnect; |
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if (!$connected) { |
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$self->connect; |
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$do_disconnect=1; |
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} |
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my $wantarray = wantarray; |
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my @r; |
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eval { |
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if ($wantarray) { |
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@r = $sub->(); |
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} else { |
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$r[0] = $sub->(); |
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} |
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}; |
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my $err = $@; |
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if ($do_disconnect) { |
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$self->disconnect; |
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} |
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if ($err) { |
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require Carp; |
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Carp::croak($err); |
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} |
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if ($wantarray) { |
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@r; |
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} else { |
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$r[0]; |
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} |
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} |
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=item disconnect |
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Disconnect the database. No further access on the database may be done. |
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=cut |
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sub disconnect { |
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my $self = shift; |
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if ($self->Connected) { |
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eval { |
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untie %{ $self->{DB} }; |
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};warn $@ if $@; |
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$self->Connected(0); |
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} |
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} |
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=item delete_db |
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Delete the database completely, including the disk file. |
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=cut |
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sub delete_db { |
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my $self = shift; |
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unlink $self->DBFile; |
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} |
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1; |
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__END__ |