Storage/Handler/Abstract.pm

##    --------------------------------------------------------------------------------
##    $Id: Abstract.pm,v 1.8 2002/12/13 21:48:35 joko Exp $
##    --------------------------------------------------------------------------------
##    $Log: Abstract.pm,v $
##    Revision 1.8  2002/12/13 21:48:35  joko
##    + sub _abstract_function
##
##    Revision 1.7  2002/12/05 07:57:48  joko
##    + now using Tie::SecureHash as a base for the COREHANDLE
##    + former public COREHANDLE becomes private _COREHANDLE now
##
##    Revision 1.6  2002/12/03 15:52:24  joko
##    + fix/feature: if dispatching to deep core method fails (is not declared), try method at Data::Storage - level
##
##    Revision 1.5  2002/12/01 22:19:33  joko
##    + just disconnect if COREHANDLE exists
##
##    Revision 1.4  2002/12/01 04:45:38  joko
##    + sub eraseAll
##    + sub createDb
##
##    Revision 1.3  2002/11/29 04:58:20  joko
##    + Storage::Result now uses the same dispatching mechanism like Storage::Handler
##
##    Revision 1.2  2002/10/17 00:08:07  joko
##    + bugfixes regarding "deep recursion" stuff
##
##    Revision 1.1  2002/10/10 03:44:07  cvsjoko
##    + new
##    --------------------------------------------------------------------------------


package Data::Storage::Handler::Abstract;

use strict;
use warnings;

use base qw( DesignPattern::Object );

use Data::Dumper;
use Tie::SecureHash;
#use Data::Storage::Handler;

# get logger instance
my $logger = Log::Dispatch::Config->instance;

#our $lock_info;

sub new {
  my $invocant = shift;
  my $class = ref($invocant) || $invocant;
  
  # logging info about the actual handler called
    $logger->debug( "$invocant->new( @_ )" );
    #$logger->debug( __PACKAGE__ . "->" . "new()" );

  # V1 - arguments become properties automagically / normal perl mode blessing
=pod
  # autovivify passed-in arguments as future object attributes into to-be-blessed hash
  my $self = { @_ };
  # create object from blessed hash-reference
  bless $self, $class;
=cut


  # V2 - maybe more convenient/secure? utilizing Damian Conway's Tie::SecureHash...
  my $self = Tie::SecureHash->new(
    $class,
    # that's it:
      'metainfo' => undef,
      'lock_info' => undef,
      '_COREHANDLE' => undef,
      'meta' => undef,
      'locator' => undef,
      'dataStorageLayer' => undef,
      'dbi' => undef,
    # tries:
      #'Data::Storage::Handler::Abstract::metainfo' => undef,
      #'dataStorageLayer'
      #'Data::Storage::Handler::Abstract::dataStorageLayer' => undef,
      #'Data::Storage::Handler::Tangram::dataStorageLayer' => undef,
      #'Data::Dumper::locator' => undef,
      #$class . '::locator' => undef,
      #'Data::Storage::Handler::Tangram::locator' => undef,
      #'Data::Storage::Handler::DBI::locator' => undef,
      #_protected => ,
      #__private => ,
  );


  # merge passed-in arguments to constructor as properties into already blessed secure object
    
    # mungle arguments from array into hash - perl does the job  ;)
    my %args = @_;
  
    # merge attributes one-by-one
    # TODO: deep_copy? / merge_deep?
    foreach (keys %args) {
      #print "key: $_", "\n";
      $self->{$_} = $args{$_};
    }
  
  # V3 - rolling our own security (just for {COREHANDLE} - nothing else)  -  nope, Tie::SecureHash works wonderful
  #my $self = { @_ };
  #bless $self, $class;
  
  
  # handle meta data
    #my $metainfo = $self->getMetaInfo($class);
    my $metainfo = $self->getMetaInfo();
    if (!$metainfo->{disconnectMethod}) { $metainfo->{disconnectMethod} = 'disconnect'; }
    # type?
    $invocant =~ s/Data::Storage::Handler:://;
    $metainfo->{type} = $invocant;

    # direct accessible (non-protected) properties         ( was: my $self = { }; )
    $self->{metainfo} = $metainfo;

  return $self;
}


sub AUTOLOAD {

  # recursion problem to be avoided here!!!
  
    # - problem: we get recursion-hangs!!!   =>  perl stops with ...
    # "Deep recursion on subroutine "Data::Storage::Handler::Abstract::AUTOLOAD" at [...]/libs/Data/Storage.pm line 38."
    
    # - when: if we log to ourselves as a storage-implementation (e.g. via Log::Dispatch::Tangram)
    # - why:  debug-messages are on a very low level including every data-operation to "Data::Storage(::Handler::X)",
    #             so e.g. a "$storage->insert" would trigger another "$storage->insert" itself 
    #             which leads to a infinite recursion loop (deep recursion)
    # - solution: locks! (by Hack or (maybe) via Perl "local"s)

  my $self = shift;

  our $AUTOLOAD;
  #return if $AUTOLOAD =~ m/::DESTROY$/;

  # find out methodname
  my $methodname = $AUTOLOAD;
  $methodname =~ s/^.*:://;
  
#print "method: $methodname", "\n";
  
  # TODO: document this! handler-private methods listed here will not be triggered (internal use)
  # in this case, "exists" is a method reserved for Tie::SecureHash,
  # which encapsulates the perl data structure (HASH) under this object
  # this is to prevent deep recursion's
  return if lc $methodname eq 'exists';

#print "$methodname - 1", "\n";

  # TODO: enhance logging/debugging
  #if (!$self->exists('COREHANDLE')) { return; }

  # handle locking (hack)
  if ($self->exists('lock_info') && $self->{lock_info}->{last_method} && $methodname eq $self->{lock_info}->{last_method}) {
    $self->{lock_info}->{log_lock} = 1;
  } else {
    $self->{lock_info}->{log_lock} = 0;
  }
  $self->{lock_info}->{last_method} = $methodname;
  
#print "$methodname - 2", "\n";

#print Dumper($self);
#exit;

  # get corehandle instance from underlying handler
  my $core = $self->getCOREHANDLE();

  # test for COREHANDLE
  #if (!$self->{_COREHANDLE}) {
#=pod
  #if (!$self->exists('_COREHANDLE')) {
  #if (!$self->{_COREHANDLE}) {
  if (!$core) {
    my $err_msg_core = __PACKAGE__ . "[$self->{metainfo}->{type}]" . ": " . "COREHANDLE is undefined while trying to execute method \"$methodname\"";
print $err_msg_core, "\n";
    if ($self->exists('lock_info') && !$self->{lock_info}->{log_lock}) {
      $logger->error( $err_msg_core );
    }
    return;
  }
#=cut

#print "$methodname - 3", "\n";

  # try to dispatch method-call to Storage::Handler::*
  #if ($self->can($methodname)) {
    #$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->" . $methodname . "(@_)" );
    #my $res = $self->$methodname(@_);
    #if ($res) { return $res; }
  #}

#print "$methodname - 4", "\n";

  # try to dispatch method-call to COREHANDLE
  # was:
  #my $core = $self->{_COREHANDLE};
  # is:
  #my $core = $self->getCOREHANDLE();

#print Dumper($core);
#exit;

  # was:
  #if ($self->{_COREHANDLE}->can($methodname) || $self->{_COREHANDLE}->can("AUTOLOAD")) {
  # is:
  if ($core->can($methodname) || $core->can("AUTOLOAD")) {
    #$logger->debug( __PACKAGE__ . "->" . $methodname . " (AUTOLOAD)" );
    #$lock_AUTOLOAD = 1 if ($methodname eq 'insert');
    if (!$self->{lock_info}->{log_lock}) {
      #print "method: $methodname", "\n";
      $logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->" . $methodname . "(@_)" );
    } else {
      # AUTOLOAD - sub is locked to prevent deep recursions if (e.g.) db-inserts cause log-actions to same db itself
    }
    #$lock_AUTOLOAD = 0;
    #$logger->log( level => 'debug', message => __PACKAGE__ . "->" . $methodname . " (AUTOLOAD)" );
    
#print "calling: $methodname", "\n";
    
    # method calls doing it until here will get dispatched to the proper handler
    return $core->$methodname(@_);
  
  } elsif ($self->can($methodname)) {
    return $self->$methodname(@_);
  }

}

sub DESTROY {
  my $self = shift;
  #if ($self->{COREHANDLE}) {
  if ($self->exists('_COREHANDLE')) {
    $logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->DESTROY" );

    my $disconnectMethod = $self->{metainfo}->{disconnectMethod};

    # call "disconnect" or alike on COREHANDLE
    # was: $self->{COREHANDLE}->disconnect();
    $disconnectMethod && $self->{_COREHANDLE} && ( $self->{_COREHANDLE}->$disconnectMethod() );

    undef $self->{_COREHANDLE};
  }
}

sub _typeCheck2 {
  my $type = shift;
  print "type: $type";
  eval("use Data::Storage::$type;");
}


# ====================================================
#   PUBLIC METHODS
# ====================================================

  sub existsChildNode {
    my $self = shift;
    my $nodename = shift;
    #$nodename = 'TransactionRoutingTable';
    $logger->debug( __PACKAGE__ . "->getChildNode( nodename $nodename )" );
    $self->getChildNodes() unless $self->{meta}->{childnodes};
    my $result = grep(m/$nodename/i, @{$self->{meta}->{childnodes}});     # TODO: use "/i" only on win32-systems!
    return $result;
  }

  sub connect_tmp {
    
#    my $self = shift;
#    my $connectionString = shift;
#    # todo: patch connectionString to $args
#    _typeCheck($self->{args}{type});

  }
  

# ====================================================
#   CONCRETE METHOD DUMMIES (croaking via "$logger" by calling "_abstract_function")
# ====================================================

  # TODO:
  #   - abstract "abstract methods" to list/hash to be used in AUTOLOAD
  #      e.g.: my @ABSTRACT_METHODS = (qw( connect sendCommand getChildNodes ));
  #      use Class::XYZ (Construct)
  #   - build them via anonymous subs 
  #   - introduce them via symbols

  sub getCOREHANDLE {
    my $self = shift;
    $self->_abstract_function('getCOREHANDLE');
  }

  sub sendCommand {
    my $self = shift;
    $self->_abstract_function('sendCommand');
  }

  sub existsChildNode_tmp {
    my $self = shift;
    $self->_abstract_function('existsChildNode');
  }

  sub getChildNodes {
    my $self = shift;
    $self->_abstract_function('getChildNodes');
  }

  sub configureCOREHANDLE {
    my $self = shift;
    $self->_abstract_function('configureCOREHANDLE');
  }

  sub getMetaInfo {
    my $self = shift;
    $self->_abstract_function('getMetaInfo');
    return;
  }

  sub getListUnfiltered {
    my $self = shift;
    $self->_abstract_function('getListUnfiltered');
    return;
  }

  sub getListFiltered {
    my $self = shift;
    $self->_abstract_function('getListFiltered');
    return;
  }

  sub sendQuery {
    my $self = shift;
    $self->_abstract_function('sendQuery');
    return;
  }

  sub connect {
    my $self = shift;
    $self->_abstract_function('connect');
    return;
  }

  sub testIntegrity {
    my $self = shift;
    $self->_abstract_function('testIntegrity');
    return;
  }

  sub quoteSql {
    my $self = shift;
    $self->_abstract_function('quoteSql');
    return;
  }

  sub eraseAll {
    my $self = shift;
    $self->_abstract_function('eraseAll');
    return;
  }

  sub createDb {
    my $self = shift;
    $self->_abstract_function('createDb');
    return;
  }

  sub dropDb {
    my $self = shift;
    $self->_abstract_function('dropDb');
    return;
  }

  sub rebuildDb {
    my $self = shift;
    $self->_abstract_function('rebuildDb');
    return;
  }

1;
1	joko	1.7	## --------------------------------------------------------------------------------
2	joko	1.9	## $Id: Abstract.pm,v 1.8 2002/12/13 21:48:35 joko Exp $
3	joko	1.7	## --------------------------------------------------------------------------------
4			## $Log: Abstract.pm,v $
5	joko	1.9	## Revision 1.8 2002/12/13 21:48:35 joko
6			## + sub _abstract_function
7			##
8	joko	1.8	## Revision 1.7 2002/12/05 07:57:48 joko
9			## + now using Tie::SecureHash as a base for the COREHANDLE
10			## + former public COREHANDLE becomes private _COREHANDLE now
11			##
12	joko	1.7	## Revision 1.6 2002/12/03 15:52:24 joko
13			## + fix/feature: if dispatching to deep core method fails (is not declared), try method at Data::Storage - level
14			##
15			## Revision 1.5 2002/12/01 22:19:33 joko
16			## + just disconnect if COREHANDLE exists
17			##
18			## Revision 1.4 2002/12/01 04:45:38 joko
19			## + sub eraseAll
20			## + sub createDb
21			##
22			## Revision 1.3 2002/11/29 04:58:20 joko
23			## + Storage::Result now uses the same dispatching mechanism like Storage::Handler
24			##
25			## Revision 1.2 2002/10/17 00:08:07 joko
26			## + bugfixes regarding "deep recursion" stuff
27			##
28			## Revision 1.1 2002/10/10 03:44:07 cvsjoko
29			## + new
30			## --------------------------------------------------------------------------------
31
32	cvsjoko	1.1
33			package Data::Storage::Handler::Abstract;
34
35			use strict;
36			use warnings;
37
38	joko	1.8	use base qw( DesignPattern::Object );
39
40	cvsjoko	1.1	use Data::Dumper;
41	joko	1.7	use Tie::SecureHash;
42			#use Data::Storage::Handler;
43	cvsjoko	1.1
44			# get logger instance
45			my $logger = Log::Dispatch::Config->instance;
46
47			#our $lock_info;
48
49			sub new {
50			my $invocant = shift;
51			my $class = ref($invocant) \|\| $invocant;
52
53			# logging info about the actual handler called
54			$logger->debug( "$invocant->new( @_ )" );
55	joko	1.2	#$logger->debug( __PACKAGE__ . "->" . "new()" );
56	cvsjoko	1.1
57	joko	1.7	# V1 - arguments become properties automagically / normal perl mode blessing
58			=pod
59			# autovivify passed-in arguments as future object attributes into to-be-blessed hash
60	joko	1.3	my $self = { @_ };
61			# create object from blessed hash-reference
62			bless $self, $class;
63	joko	1.7	=cut
64
65
66			# V2 - maybe more convenient/secure? utilizing Damian Conway's Tie::SecureHash...
67			my $self = Tie::SecureHash->new(
68			$class,
69			# that's it:
70			'metainfo' => undef,
71			'lock_info' => undef,
72			'_COREHANDLE' => undef,
73			'meta' => undef,
74			'locator' => undef,
75			'dataStorageLayer' => undef,
76			'dbi' => undef,
77			# tries:
78			#'Data::Storage::Handler::Abstract::metainfo' => undef,
79			#'dataStorageLayer'
80			#'Data::Storage::Handler::Abstract::dataStorageLayer' => undef,
81			#'Data::Storage::Handler::Tangram::dataStorageLayer' => undef,
82			#'Data::Dumper::locator' => undef,
83			#$class . '::locator' => undef,
84			#'Data::Storage::Handler::Tangram::locator' => undef,
85			#'Data::Storage::Handler::DBI::locator' => undef,
86			#_protected => ,
87			#__private => ,
88			);
89
90
91			# merge passed-in arguments to constructor as properties into already blessed secure object
92
93			# mungle arguments from array into hash - perl does the job ;)
94			my %args = @_;
95
96			# merge attributes one-by-one
97			# TODO: deep_copy? / merge_deep?
98			foreach (keys %args) {
99			#print "key: $_", "\n";
100			$self->{$_} = $args{$_};
101			}
102
103			# V3 - rolling our own security (just for {COREHANDLE} - nothing else) - nope, Tie::SecureHash works wonderful
104			#my $self = { @_ };
105			#bless $self, $class;
106
107
108	joko	1.3
109	cvsjoko	1.1	# handle meta data
110	joko	1.3	#my $metainfo = $self->getMetaInfo($class);
111			my $metainfo = $self->getMetaInfo();
112	cvsjoko	1.1	if (!$metainfo->{disconnectMethod}) { $metainfo->{disconnectMethod} = 'disconnect'; }
113			# type?
114			$invocant =~ s/Data::Storage::Handler:://;
115			$metainfo->{type} = $invocant;
116
117			# direct accessible (non-protected) properties ( was: my $self = { }; )
118	joko	1.3	$self->{metainfo} = $metainfo;
119	cvsjoko	1.1
120			return $self;
121			}
122
123
124			sub AUTOLOAD {
125
126			# recursion problem to be avoided here!!!
127
128			# - problem: we get recursion-hangs!!! => perl stops with ...
129			# "Deep recursion on subroutine "Data::Storage::Handler::Abstract::AUTOLOAD" at [...]/libs/Data/Storage.pm line 38."
130
131			# - when: if we log to ourselves as a storage-implementation (e.g. via Log::Dispatch::Tangram)
132			# - why: debug-messages are on a very low level including every data-operation to "Data::Storage(::Handler::X)",
133			# so e.g. a "$storage->insert" would trigger another "$storage->insert" itself
134			# which leads to a infinite recursion loop (deep recursion)
135	joko	1.2	# - solution: locks! (by Hack or (maybe) via Perl "local"s)
136	cvsjoko	1.1
137			my $self = shift;
138
139			our $AUTOLOAD;
140			#return if $AUTOLOAD =~ m/::DESTROY$/;
141
142			# find out methodname
143			my $methodname = $AUTOLOAD;
144			$methodname =~ s/^.*:://;
145	joko	1.7
146			#print "method: $methodname", "\n";
147
148			# TODO: document this! handler-private methods listed here will not be triggered (internal use)
149			# in this case, "exists" is a method reserved for Tie::SecureHash,
150			# which encapsulates the perl data structure (HASH) under this object
151			# this is to prevent deep recursion's
152			return if lc $methodname eq 'exists';
153
154			#print "$methodname - 1", "\n";
155
156			# TODO: enhance logging/debugging
157			#if (!$self->exists('COREHANDLE')) { return; }
158	cvsjoko	1.1
159			# handle locking (hack)
160	joko	1.7	if ($self->exists('lock_info') && $self->{lock_info}->{last_method} && $methodname eq $self->{lock_info}->{last_method}) {
161	cvsjoko	1.1	$self->{lock_info}->{log_lock} = 1;
162			} else {
163			$self->{lock_info}->{log_lock} = 0;
164			}
165			$self->{lock_info}->{last_method} = $methodname;
166
167	joko	1.7	#print "$methodname - 2", "\n";
168
169			#print Dumper($self);
170			#exit;
171
172			# get corehandle instance from underlying handler
173			my $core = $self->getCOREHANDLE();
174
175	cvsjoko	1.1	# test for COREHANDLE
176	joko	1.7	#if (!$self->{_COREHANDLE}) {
177			#=pod
178			#if (!$self->exists('_COREHANDLE')) {
179			#if (!$self->{_COREHANDLE}) {
180			if (!$core) {
181			my $err_msg_core = __PACKAGE__ . "[$self->{metainfo}->{type}]" . ": " . "COREHANDLE is undefined while trying to execute method \"$methodname\"";
182			print $err_msg_core, "\n";
183			if ($self->exists('lock_info') && !$self->{lock_info}->{log_lock}) {
184			$logger->error( $err_msg_core );
185	joko	1.2	}
186	cvsjoko	1.1	return;
187			}
188	joko	1.7	#=cut
189
190			#print "$methodname - 3", "\n";
191	cvsjoko	1.1
192			# try to dispatch method-call to Storage::Handler::*
193			#if ($self->can($methodname)) {
194			#$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->" . $methodname . "(@_)" );
195			#my $res = $self->$methodname(@_);
196			#if ($res) { return $res; }
197			#}
198
199	joko	1.7	#print "$methodname - 4", "\n";
200
201	cvsjoko	1.1	# try to dispatch method-call to COREHANDLE
202	joko	1.7	# was:
203			#my $core = $self->{_COREHANDLE};
204			# is:
205			#my $core = $self->getCOREHANDLE();
206
207			#print Dumper($core);
208			#exit;
209
210			# was:
211			#if ($self->{_COREHANDLE}->can($methodname) \|\| $self->{_COREHANDLE}->can("AUTOLOAD")) {
212			# is:
213			if ($core->can($methodname) \|\| $core->can("AUTOLOAD")) {
214	cvsjoko	1.1	#$logger->debug( __PACKAGE__ . "->" . $methodname . " (AUTOLOAD)" );
215			#$lock_AUTOLOAD = 1 if ($methodname eq 'insert');
216			if (!$self->{lock_info}->{log_lock}) {
217			#print "method: $methodname", "\n";
218			$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->" . $methodname . "(@_)" );
219			} else {
220			# AUTOLOAD - sub is locked to prevent deep recursions if (e.g.) db-inserts cause log-actions to same db itself
221			}
222			#$lock_AUTOLOAD = 0;
223			#$logger->log( level => 'debug', message => __PACKAGE__ . "->" . $methodname . " (AUTOLOAD)" );
224	joko	1.3
225	joko	1.7	#print "calling: $methodname", "\n";
226
227	joko	1.3	# method calls doing it until here will get dispatched to the proper handler
228	joko	1.7	return $core->$methodname(@_);
229	joko	1.6
230			} elsif ($self->can($methodname)) {
231			return $self->$methodname(@_);
232	cvsjoko	1.1	}
233
234			}
235
236			sub DESTROY {
237			my $self = shift;
238	joko	1.7	#if ($self->{COREHANDLE}) {
239			if ($self->exists('_COREHANDLE')) {
240	cvsjoko	1.1	$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->DESTROY" );
241
242			my $disconnectMethod = $self->{metainfo}->{disconnectMethod};
243
244			# call "disconnect" or alike on COREHANDLE
245			# was: $self->{COREHANDLE}->disconnect();
246	joko	1.7	$disconnectMethod && $self->{_COREHANDLE} && ( $self->{_COREHANDLE}->$disconnectMethod() );
247	cvsjoko	1.1
248	joko	1.7	undef $self->{_COREHANDLE};
249	cvsjoko	1.1	}
250			}
251
252	joko	1.7	sub _typeCheck2 {
253	cvsjoko	1.1	my $type = shift;
254			print "type: $type";
255			eval("use Data::Storage::$type;");
256			}
257
258
259			# ====================================================
260			# PUBLIC METHODS
261			# ====================================================
262
263	joko	1.3	sub existsChildNode {
264			my $self = shift;
265			my $nodename = shift;
266			#$nodename = 'TransactionRoutingTable';
267			$logger->debug( __PACKAGE__ . "->getChildNode( nodename $nodename )" );
268			$self->getChildNodes() unless $self->{meta}->{childnodes};
269			my $result = grep(m/$nodename/i, @{$self->{meta}->{childnodes}}); # TODO: use "/i" only on win32-systems!
270			return $result;
271			}
272	cvsjoko	1.1
273	joko	1.3	sub connect_tmp {
274	cvsjoko	1.1
275			# my $self = shift;
276			# my $connectionString = shift;
277			# # todo: patch connectionString to $args
278			# _typeCheck($self->{args}{type});
279
280			}
281
282	joko	1.3
283			# ====================================================
284			# CONCRETE METHOD DUMMIES (croaking via "$logger" by calling "_abstract_function")
285			# ====================================================
286
287			# TODO:
288			# - abstract "abstract methods" to list/hash to be used in AUTOLOAD
289			# e.g.: my @ABSTRACT_METHODS = (qw( connect sendCommand getChildNodes ));
290	joko	1.4	# use Class::XYZ (Construct)
291	joko	1.3	# - build them via anonymous subs
292			# - introduce them via symbols
293
294	joko	1.7	sub getCOREHANDLE {
295			my $self = shift;
296			$self->_abstract_function('getCOREHANDLE');
297			}
298
299	cvsjoko	1.1	sub sendCommand {
300			my $self = shift;
301			$self->_abstract_function('sendCommand');
302	joko	1.7	}
303
304			sub existsChildNode_tmp {
305			my $self = shift;
306			$self->_abstract_function('existsChildNode');
307	cvsjoko	1.1	}
308
309			sub getChildNodes {
310			my $self = shift;
311			$self->_abstract_function('getChildNodes');
312			}
313
314			sub configureCOREHANDLE {
315			my $self = shift;
316			$self->_abstract_function('configureCOREHANDLE');
317			}
318
319	joko	1.3	sub getMetaInfo {
320			my $self = shift;
321			$self->_abstract_function('getMetaInfo');
322			return;
323			}
324
325			sub getListUnfiltered {
326			my $self = shift;
327			$self->_abstract_function('getListUnfiltered');
328			return;
329			}
330
331			sub getListFiltered {
332			my $self = shift;
333			$self->_abstract_function('getListFiltered');
334			return;
335			}
336
337			sub sendQuery {
338			my $self = shift;
339			$self->_abstract_function('sendQuery');
340			return;
341			}
342
343			sub connect {
344			my $self = shift;
345			$self->_abstract_function('connect');
346			return;
347			}
348
349			sub testIntegrity {
350			my $self = shift;
351			$self->_abstract_function('testIntegrity');
352			return;
353			}
354
355			sub quoteSql {
356			my $self = shift;
357			$self->_abstract_function('quoteSql');
358	joko	1.4	return;
359			}
360
361			sub eraseAll {
362			my $self = shift;
363			$self->_abstract_function('eraseAll');
364			return;
365			}
366
367			sub createDb {
368			my $self = shift;
369			$self->_abstract_function('createDb');
370	joko	1.9	return;
371			}
372
373			sub dropDb {
374			my $self = shift;
375			$self->_abstract_function('dropDb');
376			return;
377			}
378
379			sub rebuildDb {
380			my $self = shift;
381			$self->_abstract_function('rebuildDb');
382	joko	1.3	return;
383			}
384
385			1;
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