/[cvs]/nfo/perl/libs/Data/Storage/Handler/Tangram.pm
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revision 1.5 by joko, Sun Nov 17 06:35:18 2002 UTC revision 1.46 by jonen, Thu May 6 12:54:34 2004 UTC
# Line 1  Line 1 
1  #################################  ############################################
2  #  #
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.46  2004/05/06 12:54:34  jonen
7    #  + bugfix related to multiple select-'filter'
8    #
9    #  Revision 1.45  2003/12/14 01:48:36  jonen
10    #  small HACK at _insertChildNode: some special Childnodes should not be created because existing objects have to be selected!
11    #  TODO: make this more generic, e.g. implement a special flag at Schema
12    #
13    #  Revision 1.44  2003/12/04 01:01:50  joko
14    #  + sendQuery now returns result even on crud=UPDATE
15    #
16    #  Revision 1.43  2003/07/02 11:07:12  jonen
17    #  re-activate filtering of results *after* results are fetched from tangram
18    #    (needed for e.g. UserManagment)
19    #
20    #  Revision 1.42  2003/07/01 23:24:17  joko
21    #  now using package before using function
22    #
23    #  Revision 1.41  2003/06/29 02:03:45  joko
24    #  fix:? initialize schema on startup
25    #
26    #  Revision 1.40  2003/06/25 22:57:54  joko
27    #  major rework of "sub sendQuery / sub getListFiltered": now should be capable of "sorting"
28    #
29    #  Revision 1.39  2003/06/06 11:40:40  jonen
30    #  fixed bug at 'getFilteredList'
31    #
32    #  Revision 1.38  2003/05/13 16:38:38  joko
33    #  problems with "tied" on 5.6.1/win32
34    #
35    #  Revision 1.37  2003/05/10 17:37:39  jonen
36    #  corrected last commit
37    #
38    #  Revision 1.36  2003/05/10 17:31:18  jonen
39    #  + added new functions related to 'create' item
40    #   - createNode()
41    #     # creates non-persistent 'deep dummy filled' object
42    #   - insertChildNode()
43    #     # inserts child node at given parent (child node haven't to exists,
44    #         createNode will be injected transparently)
45    #
46    #  Revision 1.35  2003/04/19 16:09:48  jonen
47    #  + added operator dispatching (currently for getting ref-type) at 'getListFiltered'
48    #
49    #  Revision 1.34  2003/04/11 01:18:53  joko
50    #  sendQuery:
51    #  + introduced crud action 'DELETE'
52    #
53    #  Revision 1.33  2003/04/09 06:07:43  joko
54    #  revamped 'sub sendQuery'
55    #
56    #  Revision 1.32  2003/04/08 22:52:22  joko
57    #  modified 'querySchema': better behaviour regarding filtering result
58    #
59    #  Revision 1.31  2003/04/05 21:24:09  joko
60    #  modified 'sub getChildNodes': now contains code from 'querySchema'
61    #
62    #  Revision 1.30  2003/03/27 15:31:14  joko
63    #  fixes to modules regarding new namespace(s) below Data::Mungle::*
64    #
65    #  Revision 1.29  2003/02/21 01:47:18  joko
66    #  purged old code
67    #  minor cosmetics
68    #
69    #  Revision 1.28  2003/02/20 20:20:26  joko
70    #  tried to get auto-disconnect working again - failed with that
71    #
72    #  Revision 1.27  2003/01/31 06:30:59  joko
73    #  + enabled 'sendQuery'
74    #
75    #  Revision 1.26  2003/01/30 22:29:47  joko
76    #  + fixed module usage (removed dependency on 'libp.pm')
77    #
78    #  Revision 1.25  2003/01/19 02:30:05  joko
79    #  + fix: modified call to '_initSchema'
80    #
81    #  Revision 1.24  2002/12/22 14:13:01  joko
82    #  + sub dropDb
83    #
84    #  Revision 1.23  2002/12/19 16:31:53  joko
85    #  +- renamed sub to 'rebuildDb'
86    #
87    #  Revision 1.22  2002/12/18 22:28:16  jonen
88    #  + added extended logging at 'getObjectByGuid()'
89    #
90    #  Revision 1.21  2002/12/16 22:20:49  jonen
91    #  + fixed bug at 'getObjectByGuid()'
92    #
93    #  Revision 1.20  2002/12/16 20:49:17  jonen
94    #  + added sub 'getObjectByGuid()'
95    #  + added functionality to use 'getObjectByGuid' at 'getObjectAsHash()'
96    #
97    #  Revision 1.19  2002/12/16 06:46:09  joko
98    #  + attempt to introduce a generic '_patchSchema' - cancelled!
99    #
100    #  Revision 1.18  2002/12/13 21:48:07  joko
101    #  + fix to 'sub sendQuery'
102    #
103    #  Revision 1.17  2002/12/12 02:51:09  joko
104    #  + cosmetics
105    #
106    #  Revision 1.16  2002/12/11 06:54:10  joko
107    #  + fix: encapsulated object-loading inside an 'eval'
108    #
109    #  Revision 1.15  2002/12/05 13:55:21  joko
110    #  + now utilizing 'expand' instead of 'var_deref'
111    #  + played around with having fresh-objects - no progress....
112    #
113    #  Revision 1.14  2002/12/05 09:40:30  jonen
114    #  + added option->{destroy} at getObject for unloading all instance
115    #
116    #  Revision 1.13  2002/12/05 07:59:04  joko
117    #  + now using Tie::SecureHash as a base for the COREHANDLE
118    #  + former public COREHANDLE becomes private _COREHANDLE now
119    #  + sub getCOREHANDLE
120    #
121    #  Revision 1.12  2002/12/04 11:34:49  joko
122    #  - $schema_tangram doesn't have to be in class?
123    #
124    #  Revision 1.11  2002/12/04 08:54:08  jonen
125    #  + untested bugfix: undef($object) after transform to hash at getObjectAsHash
126    #
127    #  Revision 1.10  2002/12/03 15:53:23  joko
128    #  + small bugfix regarding object hierarchy
129    #
130    #  Revision 1.9  2002/12/03 05:29:40  joko
131    #  + sub getObject
132    #  + sub getObjectAsHash
133    #
134    #  Revision 1.8  2002/12/01 22:25:51  joko
135    #  + now utilizing metadata from storage locator when connecting to DBI in "raw"-mode
136    #
137    #  Revision 1.7  2002/12/01 04:46:19  joko
138    #  + sub eraseAll
139    #
140    #  Revision 1.6  2002/11/29 05:02:30  joko
141    #  - sub getNewPerlObjectByPkgName (moved to libp.pm)
142    #  + sub getMetaInfo
143    #  - sub existsChildNode (moved to Abstract.pm)
144    #  + sub getListUnfiltered
145    #  + sub getListFiltered
146    #  + sub createCursor
147    #  + sub createSet
148    #  + sub sendQuery
149    #
150  #  Revision 1.5  2002/11/17 06:35:18  joko  #  Revision 1.5  2002/11/17 06:35:18  joko
151  #  + locator metadata can now be reached via ->{locator}  #  + locator metadata can now be reached via ->{locator}
152  #  - getChildNodes is now wrapped via COREHANDLE  #  - getChildNodes is now wrapped via COREHANDLE
# Line 25  Line 169 
169  #  Revision 1.1  2002/10/10 03:44:07  cvsjoko  #  Revision 1.1  2002/10/10 03:44:07  cvsjoko
170  #  + new  #  + new
171  #  #
172  #  ############################################
173  #################################  
174    
175  package Data::Storage::Handler::Tangram;  package Data::Storage::Handler::Tangram;
176    
177  use strict;  use strict;
178  use warnings;  use warnings;
179    
180    use base ("Data::Storage::Handler");
181  use base ("Data::Storage::Handler::Abstract");  use base ("Data::Storage::Handler::Abstract");
182    
183  use Tangram;  
184  use Data::Dumper;  use Data::Dumper;
185    use Tangram;
186    use Class::Tangram;
187    
188    use DesignPattern::Object;
189    use Data::Storage::Result::Tangram;
190    use Data::Mungle::Compare::Struct qw( isEmpty );
191    use Data::Mungle::Transform::Deep qw( expand deep_copy merge_to );
192    
193  # get logger instance  # get logger instance
194  my $logger = Log::Dispatch::Config->instance;  my $logger = Log::Dispatch::Config->instance;
195    
196    #$Tangram::TRACE = *STDOUT;
197    
198  our $metainfo = {  # this holds the complete instantiated schema from tangram
199    'disconnectMethod' => 'disconnect',  my $schema_tangram;
 };  
200    
201  sub getNewPerlObjectByPkgName {  sub getMetaInfo {
202    my $pkgname = shift;    my $self = shift;
203    my $args = shift;    $logger->debug( __PACKAGE__ . "->getMetaInfo()"  );
204    $logger->debug( __PACKAGE__ . "->getNewPerlObjectByPkgName( pkgname $pkgname args $args )" );    return {
205    my $evstring = "use $pkgname;";      'disconnectMethod' => 'disconnect',
206    eval($evstring);    };
   $@ && $logger->error( __PACKAGE__ . ':' . __LINE__ . " Error in eval $evstring: " .  $@ );  
   return $pkgname->new($args);  
207  }  }
208    
209  sub _initSchema {  sub _initSchema {
210    my $self = shift;    my $self = shift;
211    $logger->debug( __PACKAGE__ . "->_initSchema()" );    $logger->debug( __PACKAGE__ . "->_initSchema()" );
212    #if (!$self->{schema_tangram}) {    #if (!$schema_tangram) {
213      my $obj = getNewPerlObjectByPkgName($self->{locator}->{schema}, { EXPORT_OBJECTS => $self->{locator}->{classnames}, want_transactions => $self->{locator}->{want_transactions} } );      #my $obj = getNewPerlObjectByPkgName($self->{locator}->{schema}, { EXPORT_OBJECTS => $self->{locator}->{classnames}, want_transactions => $self->{locator}->{want_transactions} } );
214      $self->{schema_tangram} = $obj->getSchema();      my $obj = DesignPattern::Object->fromPackage($self->{locator}->{schema}, { 'EXPORT_OBJECTS' => $self->{locator}->{classnames}, 'want_transactions' => $self->{locator}->{want_transactions} } );
215        $schema_tangram = $obj->getSchema() if $obj;
216    #}    #}
217    if (!$self->{schema_tangram}) {    if (!$schema_tangram) {
218      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{locator}->{schema}." );
219      return 0;      return 0;
220    }    }
221      #$self->_patchSchema();
222    return 1;    return 1;
223  }  }
224    
225    sub _patchSchema {
226      my $self = shift;
227      foreach (keys %{$schema_tangram->{classes}}) {
228        next if $schema_tangram->{classes}->{$_}->{abstract};
229        #next if ($_ ne 'TsBankAccount');
230        #$_ ne 'AbstractAccount' &&
231        print "class: $_", "\n";
232    #print Dumper($schema_tangram->{classes}->{$_});
233        # create new string property named 'guid'
234        my $tstring = Tangram::String->new();
235        $tstring->{name} = $tstring->{col} = 'guid';
236        # inject property into schema
237        #$schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields}->{string}->{$tstring->{name}} = $tstring;
238        print Dumper($schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields});
239      }
240    }
241    
242  sub connect {  sub connect {
243    
244      my $self = shift;      my $self = shift;
245            
246      my $dsn = shift;      my $dsn = shift;
247    
248    #print Dumper($self);
249    #exit;
250    
251        # TODO: re-enable
252      $dsn ||= $self->{locator}->{dbi}->{dsn};      $dsn ||= $self->{locator}->{dbi}->{dsn};
       
253      $logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );      $logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );
254            
255      #my $storage = Tangram::Relational->connect( $schema, $dsn );      #my $storage = Tangram::Relational->connect( $schema, $dsn );
# Line 89  sub connect { Line 262  sub connect {
262  #    }  #    }
263    
264      return unless $self->_initSchema();      return unless $self->_initSchema();
265        #$self->_initSchema();
266    
267        # create the main tangram storage object
268      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
269      $self->{COREHANDLE} = Tangram::Relational->connect( $self->{schema_tangram}, $dsn );      $self->{_COREHANDLE} = Tangram::Relational->connect( $schema_tangram, $dsn );
270    
271    #print "connect", "\n";
272    #my $core = $self->{_COREHANDLE};
273    #print Dumper($core);
274        
275        # some attempts for configuring the wrapped underlying dbi.....
276      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();
277      #$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE();      #$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE();
278      #$self->_configureUnderlyingStorage;      #$self->_configureUnderlyingStorage;
279        
280        # ..... encapsulation wins!
281      $self->configureCOREHANDLE();      $self->configureCOREHANDLE();
282    
283    $self->{locator}->{status}->{connected} = 1;    $self->{locator}->{status}->{connected} = 1;
# Line 107  sub connect { Line 289  sub connect {
289  sub getChildNodes {  sub getChildNodes {
290    
291    my $self = shift;    my $self = shift;
292    my @nodes;    my $mode = shift;
293      my $filter = shift;
294      
295      $mode ||= 'core';
296      $filter ||= 'all';
297      
298      $logger->debug( __PACKAGE__ . "->getChildNodes($mode)" );
299    
300    $logger->debug( __PACKAGE__ . "->getChildNodes()" );    if ($mode eq 'core') {
301    
302    # create new DBI - Data::Storage - object from already connected DBI::db - handle inside the current COREHANDLE      my @nodes;
303    #my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} });      
304    #my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} );      # create new DBI - Data::Storage - object from already connected DBI::db - handle inside the current COREHANDLE
305    my $storage = $self->_getSubLayerHandle();      #my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} });
306    @nodes = @{$storage->getChildNodes()};      #my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} );
307    #$storage->_configureCOREHANDLE();      
308  #print "getchildnodes\n";      # todo: should we retrieve information from the schema here
309  #print Dumper($self);      # rather than poorly getting table names from underlying dbi?
310    #if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {      my $storage = $self->_getSubLayerHandle();
311        @nodes = @{$storage->getChildNodes()};
312        #$storage->_configureCOREHANDLE();
313      #print "getchildnodes\n";
314      #print Dumper($self);
315        #if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {
316        
317        # TODO: REVIEW
318        #$storage->disconnect();
319        
320        $self->{meta}->{childnodes} = \@nodes;
321    
322        return \@nodes;
323        
324    $storage->disconnect();    } elsif ($mode eq 'root') {
325        
326        # FIXME: this will return *all* known classes to 'Class::Tangram',
327        # which might not be what you expect since more than one instance
328        # of Tangram may be in memory and Class::Tangram seems to
329        # offer no methods to determine this or filter its result(s) according
330        # to a specific database.
331        my @object_names = Class::Tangram::known_classes();
332        my @concret_names;
333        my $o_cnt;
334        foreach (sort @object_names) {
335          push @concret_names, $_  if (!Class::Tangram::class_is_abstract($_));
336          $o_cnt++;
337        }
338    
339        if ($filter eq 'all') {
340          return \@object_names;
341        } elsif ($filter eq 'concrete') {
342          return \@concret_names;
343        }
344        
345    $self->{meta}->{childnodes} = \@nodes;    }
346        
   return \@nodes;  
347    
348  }  }
349    
   
 sub existsChildNode {  
   my $self = shift;  
   my $nodename = shift;  
   $logger->debug( __PACKAGE__ . "->getChildNode( nodename $nodename )" );  
   $self->getChildNodes() unless $self->{meta}->{childnodes};  
   #print Dumper($self->{meta}->{childnodes});  
   return grep $nodename, @{$self->{meta}->{childnodes}};  
 }  
   
   
350  sub testIntegrity {  sub testIntegrity {
351    
352    my $self = shift;    my $self = shift;
# Line 200  sub _configureUnderlyingStorage { Line 407  sub _configureUnderlyingStorage {
407    foreach my $key (keys %{$self->{dbi}}) {    foreach my $key (keys %{$self->{dbi}}) {
408      my $val = $self->{dbi}->{$key};      my $val = $self->{dbi}->{$key};
409      print "entry: $key; $val", "\n";      print "entry: $key; $val", "\n";
410      $self->{COREHANDLE}->{db}->{$key} = $val;      $self->{_COREHANDLE}->{db}->{$key} = $val;
411    }    }
412    #print Dumper($self->{COREHANDLE}->{db});    #print Dumper($self->{COREHANDLE}->{db});
413  }  }
# Line 213  sub configureCOREHANDLE { Line 420  sub configureCOREHANDLE {
420    $logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );    $logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );
421    
422    #my $subLayer = $self->_getSubLayerHandle();    #my $subLayer = $self->_getSubLayerHandle();
423      #print Dumper($self);
424      #exit;
425    
426    # apply configured modifications    # apply configured modifications
427      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {
428        $self->{COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});        $self->{_COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});
429      }      }
430      if (exists $self->{dbi}->{RaiseError}) {      if (exists $self->{dbi}->{RaiseError}) {
431        $self->{COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};        $self->{_COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};
432      }      }
433      if (exists $self->{dbi}->{PrintError}) {      if (exists $self->{dbi}->{PrintError}) {
434        $self->{COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};        $self->{_COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};
435      }      }
436      if (exists $self->{dbi}->{HandleError}) {      if (exists $self->{dbi}->{HandleError}) {
437        $self->{COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};        $self->{_COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};
438      }      }
439    
440  }  }
# Line 235  sub deploySchema { Line 444  sub deploySchema {
444    my $args = shift;    my $args = shift;
445        
446    my $dsn = $self->{locator}->{dbi}->{dsn};    my $dsn = $self->{locator}->{dbi}->{dsn};
   #my $dsn = $self->{dbi}->{dsn};  
447    
448    $logger->debug( __PACKAGE__ . "->deploySchema( dsn $dsn )" );    $logger->debug( __PACKAGE__ . "->deploySchema( dsn $dsn )" );
449    
450    my $ok;    my $ok;
451    # TODO: is this DBI->connect okay here like it is? regarding errors.....???    if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
   if ( my $dbh = DBI->connect($dsn, '', '', {  
                                                       PrintError => 0,  
                                                     } ) ) {  
   
452      return unless $self->_initSchema();      return unless $self->_initSchema();
453            $ok = Tangram::Relational->deploy($schema_tangram, $dbh );
     $ok = Tangram::Relational->deploy($self->{schema_tangram}, $dbh );  
454      $dbh->disconnect();      $dbh->disconnect();
455    }    }
456    return $ok;    return $ok;
# Line 257  sub retreatSchema { Line 460  sub retreatSchema {
460    
461    my $self = shift;    my $self = shift;
462    my $dsn = $self->{locator}->{dbi}->{dsn};    my $dsn = $self->{locator}->{dbi}->{dsn};
   #my $dsn = $self->{dbi}->{dsn};  
463    
464    $logger->debug( __PACKAGE__ . "->retreatSchema( dsn $dsn )" );    $logger->debug( __PACKAGE__ . "->retreatSchema( dsn $dsn )" );
465    
466    my $ok;    my $ok;
467    if ( my $dbh = DBI->connect($dsn, '', '', {    if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
                                                       #PrintError => 0,  
                                                       #RaiseError => 0,  
                                                     } ) ) {  
468    
469      return unless $self->_initSchema();      return unless $self->_initSchema();
470            
471      #use Data::Dumper; print Dumper($self);      #use Data::Dumper; print Dumper($self);
472      $self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");      $self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");
473            
474      $ok = Tangram::Relational->retreat($self->{schema_tangram}, $dbh );      $ok = Tangram::Relational->retreat($schema_tangram, $dbh );
475      $ok = 2;    # answer is "maybe" for now since Tangram::Relational->retreat doesn't seem to return a valid status  
476                      # idea: test this by checking for count of tables in database -      # answer "$ok=2" means "maybe" for now - we have to patch this to a constant here because...
477                      #          problem with this: there may be some left not having been included to the schema      # - ... Tangram::Relational->retreat doesn't seem to return a valid status
478        # - possible improvement:
479        #   - test this by checking for count of tables in database
480        #   - problem with this: there may be some left not having been included to the schema
481        #   - maybe better: use "->getChildNodes"?
482        $ok = 2;
483    
484      $dbh->disconnect();      $dbh->disconnect();
485    
486    }    }
487    return $ok;    return $ok;
488  }  }
489    
490  sub rebuildDbAndSchema {  sub rebuildDb {
491    my $self = shift;    my $self = shift;
492    $logger->info( __PACKAGE__ . "->rebuildDbAndSchema()" );    $logger->info( __PACKAGE__ . "->rebuildDb()" );
493    my @results;    my @results;
494    
495    # sum up results (bool (0/1)) in array    # sum up results (bool (0/1)) in array
# Line 301  sub rebuildDbAndSchema { Line 507  sub rebuildDbAndSchema {
507    return $res;    return $res;
508  }  }
509    
510    sub getListUnfiltered {
511      my $self = shift;
512      my $nodename = shift;
513      my @results;
514      $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );
515      # get set of objects from odbms by object name
516      my $object_set = $self->{_COREHANDLE}->remote($nodename);
517      @results = $self->{_COREHANDLE}->select($object_set);
518      return \@results;
519    }
520    
521    sub getListFiltered {
522      my $self = shift;
523    
524      # redirect to unfiltered mode
525      #return $self->getListUnfiltered(@_);
526    
527      my $in = {};
528      $in->{nodename} = shift;
529      $in->{filters} = shift;
530      $in->{sorting} = shift;
531      
532      my @results;
533      $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $in->{nodename} . "' )" );
534    
535      #print "Filter_payload: " . Dumper($in->{filters}) . "\n";
536    
537      # 1. "Remote Object Handle" - get set of objects from odbms by object name
538      my $remote = $self->{_COREHANDLE}->remote($in->{nodename});
539      
540      # 2. Transfer $in to $orm_query
541      my $orm_query = {};
542      
543      # 2.a. Filters
544      my @tfilters;
545      my $orm_filter = undef;
546      
547      foreach my $filter (@{$in->{filters}}) {
548      
549        # get filter - TODO: for each filter
550        #my $filter = $filters->[0];
551    
552        # 1. The parts of a filter source entry
553        my $lexpr = $filter->{key};
554        #my $op = $filter->{op};
555        my $op = '=';
556        my $rexpr = $filter->{val};
557        my $tight = 100;
558    
559        # 2. Build filter target entry
560        
561        # Test 1 - didn't work out!
562        #  my $tfilter = Tangram::Filter->new(
563        #    expr => "t1.$lexpr $op '$rexpr'",
564        #    tight => $tight,
565        #    objects => $objects,
566        #  );
567    
568        my $orm_filter_tmp = undef;
569        # was:
570        # TODO: is_op?
571        # dispatch un-common operators if exists
572        if ($filter->{op} eq "ref") {
573          # do nothing, results will be filtered later cause 'tangram-filter' doesn't support 'ref' query
574          #print "Filter->op eq 'ref'.\n";
575          #push @tfilters, 'ref($remote->{' . $filter->{key} . '})' . " eq '$filter->{val}'";
576        } else {
577          # HACK: build eval-string (sorry) to get filtered list - please give advice here
578          #push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
579          # better: calculate expression right here!
580          #push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
581          
582          #print "key: ", $filter->{key}, "\n";
583          
584          my $left = $remote->{$filter->{key}};
585          #my $r = Tangram::Expr->new( 'string' => "'" . $filter->{val} . "'" );
586          my $right = $filter->{val};
587          my $op = $filter->{op};
588          $orm_filter_tmp = $left->$op($right);
589        }
590    
591        if (!ref($orm_filter)) {
592          $orm_filter = $orm_filter_tmp;
593        } else {
594          $orm_filter = $orm_filter->and($orm_filter_tmp);
595        }
596    
597      }
598    
599      $orm_query->{filter} = $orm_filter;
600      
601      # debug point:
602      #print "Filter: " . Dumper($orm_query->{filter}) . "\n";
603    
604      # was:
605    
606      # 2.b. sorting [new as of 2003-06-17]
607      if ($in->{sorting}) {
608        my $sorting_rules = [];
609        my $sorting_order = 'ASC';
610        foreach my $sorting_column (keys %{$in->{sorting}}) {
611          $sorting_order = $in->{sorting}->{$sorting_column} if $in->{sorting}->{$sorting_column};
612          push @$sorting_rules, Tangram::Expr->new( 'string' => $sorting_column );
613        }
614        $orm_query->{order} = $sorting_rules;
615        if ($sorting_order eq 'DESC') {
616          $orm_query->{desc} = 1;
617        }
618      }
619    
620    
621      # 3. build and issue query - return result as Tangram::Cursor
622      
623      # coerce hash into array (This is valid in Perl)
624      my @orm_query_args = %$orm_query;
625      # send query (arguments) to orm
626      @results = $self->{_COREHANDLE}->select($remote, @orm_query_args);
627      
628      #my $cursor = $self->{_COREHANDLE}->cursor($remote, @orm_query_args);
629      #return $cursor;
630      #print Dumper(@results);
631    
632      # is:
633      # HACK: build eval-string (sorry) to get filtered list - please give advice here
634        #my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . $sorting . ');';
635        #print "eval: $evalstring", "\n";
636        # get filtered list/set
637        #@results = eval($evalstring);
638        #die $@ if $@;
639    
640      # filter results - NEEDED for e.g. UserManagment !!
641      if ($in->{filters}->[0]->{op} && ($in->{filters}->[0]->{op} eq "ref")) {
642          #print "Filter->op eq 'ref'.\n";
643          my $att_name = $in->{filters}->[0]->{key};
644          my $att_val = $in->{filters}->[0]->{val};
645          my @filtered;
646          foreach(@results) {
647            if(ref($_->{$att_name}) eq $att_val) {
648              push @filtered, $_;
649            }
650          }
651          @results = @filtered;
652      }
653    
654      #print "results: " . Dumper(\@results);
655      
656      return \@results;
657    }
658    
659    sub createCursor {
660      my $self = shift;
661      my $node = shift;
662      my $cmdHandle = $self->{_COREHANDLE}->cursor($node);
663      my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );
664      return $result;
665    }
666    
667    sub createSet {
668      my $self = shift;
669    #print "-" x 80, "\n";
670    #print Dumper(@_);
671      my @objects = @_;
672      my $rh = Set::Object->new();
673      foreach (@objects) {
674        if (!isEmpty($_)) {
675    #print Dumper($_);
676          $rh->insert($_);
677        }
678      }
679      #print Dumper($rh->members());
680      my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
681      return $result;
682    }
683    
684    sub createResult {
685      my $self = shift;
686      my $rh = shift;
687      my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
688      return $result;
689    }
690    
691    sub sendQuery {
692      my $self = shift;
693      my $query = shift;
694    
695      #print Dumper($query);
696    
697      # type = ITEM|LIST|TRANSPARENT
698      my $type = '';
699      # mode = OID|SPECIAL
700      my $mode = '';
701      my $ident = '';
702      my $crud = '';
703      
704      
705      # dispatch type and mode
706      
707        # defaults - 1
708        if ($query->{options}) {
709          $crud = $query->{options}->{crud};
710          $crud ||= $query->{options}->{action};
711        }
712    
713        # defaults - 2
714        $type ||= 'TRANSPARENT';
715        $crud ||= 'RETRIEVE';
716    
717        if ($query->{options}->{OID}) {
718          $type = 'ITEM';
719          $mode = 'OID';
720          $ident = $query->{options}->{OID};
721        
722        } elsif (my $guid = $query->{options}->{GUID}) {
723          $type = 'TRANSPARENT';
724          $query->{criterias} = [ { key => 'guid', op => 'eq', val => $guid } ];    
725    
726        # if operator is different (dispatcher for 'getListFiltered')
727        } elsif (my $op = $query->{options}->{op}) {
728          $type = 'TRANSPARENT';
729          $query->{criterias} = [ { key => $query->{options}->{meta_label}, op => $op, val => $query->{options}->{meta_value} } ];    
730    
731        }
732      
733        # HACK: special case: querying by id does not translate into a common tangram query
734        # just load the object by given identifier (OID) named 'id' - this is required by Data::Transfer::Sync!
735        if ($query->{criterias} && ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq')) {
736          $type = 'ITEM';
737          $mode = 'SPECIAL.SYNC';
738          $ident = $query->{criterias}->[0]->{val};
739        }
740      
741    
742      # execute query
743      my $result;
744    
745      if ($type eq 'ITEM' && $ident) {
746    
747        if ($mode eq 'OID') {    
748          # TODO: review this case!
749          $result = $self->getObject($ident, $query->{options});
750        
751        } elsif ($mode eq 'SPECIAL.SYNC') {
752    
753          # V1 - failed
754          #return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );
755      
756          # hmm....
757          #return $self->createSet() if $ident == 5;
758          
759          # Unload single object before doing any further operations to
760          # expect a "fresh" object from orm when performing the next calls.
761          $self->{_COREHANDLE}->unload($ident);
762          
763          # Load object from orm.
764          my $object = $self->{_COREHANDLE}->load($ident);
765      
766          # determine object identifier (OID)
767          my $oid = $self->{_COREHANDLE}->id($object);
768          
769          # encapsulate into result/response container and return this one
770          $result = $self->createSet($object);
771          
772          # debugging
773          #$result = $self->createSet( $self->{COREHANDLE}->load('300090018') );
774    
775        }
776        
777      
778      } elsif ($type eq 'TRANSPARENT') {
779    
780        if ($crud eq 'RETRIEVE') {
781    
782          my $list = $self->getListFiltered($query->{node}, $query->{criterias}, $query->{sorting});
783          #return $list;
784          return $self->createResult($list);
785          
786          #return $self->createSet($object);
787          #return $self->createSet($list);
788          return $self->createSet(@$list);
789        
790          #die("This should not be reached for now - redirect to \$self->getListFiltered() here!");
791        
792          # try a generic tangram query here
793          # TODO: try to place an oql on top of that (search.cpan.org!)
794          my @crits;
795          foreach (@{$query->{criterias}}) {
796            my $op = '';
797            $op = '=' if lc $_->{op} eq 'eq';
798            push @crits, "$_->{key}$op'$_->{val}'";
799          }
800          my $subnodes = {};
801          map { $subnodes->{$_}++ } @{$query->{subnodes}};
802          # HACK: this is hardcoded ;(    expand possibilities!
803          #my $crit = join(' AND ', @crits);
804          #my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit);
805          #return $self->sendCommand($sql);
806          #my $h = $self->{COREHANDLE}->remote($query->{node});
807          #my $res = $self->{COREHANDLE}->select($h, $h->{);
808          $result = $self->createCursor($query->{node});
809    
810        } elsif ($crud eq 'UPDATE') {
811    
812          # Patch current query to be a loader (e.g. change action, remove payload) ...
813          my $childquery = deep_copy($query);
814          $childquery->{options}->{crud} = 'RETRIEVE';
815          delete $childquery->{payload};
816    
817          # ... to use it to fetch a fresh object using ourselves (sendQuery).
818          my $cursor = $self->sendQuery($childquery);
819          my $status = $cursor->getStatus();
820          my $object = $cursor->getNextEntry();
821    
822          # Merge values and apply value modifiers.
823          my $options = { utf8 => 1, php => 1 };
824          merge_to($object, $query->{payload}, $options);
825    
826          #print Dumper($object);
827          
828          # Execute update operation at orm.
829          $self->update($object);
830          $result = $self->createResult([ $object ]);
831        
832        } elsif ($crud eq 'DELETE') {
833    
834          # Patch current query to be a loader (e.g. change action) ...
835          my $childquery = deep_copy($query);
836          $childquery->{options}->{crud} = 'RETRIEVE';
837    
838          # ... to use it to fetch a fresh object using ourselves (sendQuery).
839          my $cursor = $self->sendQuery($childquery);
840          my $status = $cursor->getStatus();
841          my $object = $cursor->getNextEntry();
842    
843          $self->erase($object);
844          $self->unload($object);
845    
846        } elsif ($crud eq 'CREATE') {
847          
848          my $nodename = $query->{node};      
849          my $newnode = $self->createNode($nodename);
850          my $id = $self->{_COREHANDLE}->insert($newnode);
851      
852          print "Saved new node $nodename with GUID $newnode->{guid}, OID '$id': " . Dumper($newnode) . "\n";
853          
854          return $newnode;
855    
856        }
857    
858      }
859    
860      return $result;
861    
862    }
863    
864    sub eraseAll {
865      my $self = shift;
866      my $classname = shift;
867      my $remote = $self->{_COREHANDLE}->remote($classname);
868      my @objs = $self->{_COREHANDLE}->select($remote);
869      $self->{_COREHANDLE}->erase(@objs);
870    }
871    
872    sub createDb {
873      my $self = shift;
874      my $storage = $self->_getSubLayerHandle();
875      return $storage->createDb();
876    }
877    
878    sub getObject {
879      my $self = shift;
880      my $oid = shift;
881      my $options = shift;
882    
883      # TODO: create a deep_unload method (currently _all_ objects are unloaded)
884      # unload($oid) will only unload object, not deep object hashes
885      $self->{_COREHANDLE}->unload() if ($options->{destroy});
886    
887      # TODO: review this
888      #if (!$self->{COREHANDLE}) { return; }
889    
890      # TODO: review this
891      my $object = eval('$self->{_COREHANDLE}->load($oid);');
892      print $@, "\n" if $@;
893    
894      return $object if $object;
895    }
896    
897    sub getObjectByGuid_old {
898      my $self = shift;
899      my $guid = shift;
900      my $options = shift;
901      
902      # Guid and Classname is needed
903      if(!$guid || !$options->{classname}) {
904       $logger->error( __PACKAGE__ . "->getObjectByGuid: No 'guid' OR no Classname in options hash was given but needed!" );
905        return;
906      }
907      
908      # TODO: create a deep_unload method (currently _all_ objects are unloaded)
909      # unload($oid) will only unload object, not deep object hashes
910      $self->{_COREHANDLE}->unload() if ($options->{destroy});
911    
912      # search for object with given Classname and Guid
913      my $obj_tmp = $self->{_COREHANDLE}->remote($options->{classname});
914      my @result = $self->{_COREHANDLE}->select($obj_tmp, $obj_tmp->{guid} eq $guid);
915      
916      # we searched for global unique identifer of some object,
917      # so I think we can trust there would be only one result
918      if($result[0]) {
919        return $result[0];
920      } else {
921        $logger->error( __PACKAGE__ . "->getObjectByGuid: No Object with Classname $options->{classname} and GUID $guid found!" );
922        return;
923      }
924      
925    }
926    
927    sub getObjectAsHash_old {
928      my $self = shift;
929      my $oid = shift;
930      my $options = shift;  
931      my $obj;
932      
933      if($options->{guid}) {
934        $obj = $self->getObjectByGuid($oid, $options);
935      } else {
936        $obj = $self->getObject($oid, $options);
937      }
938      
939      # build options (a callback to unload autovivified objects) for 'expand'
940      # TODO: use $logger to write to debug here!
941      my $cb; # = sub {};
942    
943      # deactivated way to get rid of used instances, if requested
944    =pod
945        if ($options->{destroy}) {
946          $options->{cb}->{destroy} = sub {
947            print "================ DESTROY", "\n";
948            my $object = shift;
949            #print Dumper($object);
950            $self->{_COREHANDLE}->unload($object);
951            #undef($object);
952          };
953        }
954    =cut
955    
956      my $hash = expand($obj, $options);
957    
958      # old (unsuccessful) attempts to get rid of used instances, if requested
959    
960        # V1:
961        #$options->{cb}->{destroy}->($obj);
962        #$self->{_COREHANDLE}->unload($obj);
963      
964        # V2:
965        #$obj->clear_refs;
966        #$self->{COREHANDLE}->unload($obj) if($options->{destroy});
967        #$obj->DESTROY;
968        #undef($obj) if($options->{destroy});
969      
970      return $hash;
971    }
972    
973    sub getSchema {
974      return $schema_tangram;
975    }
976    
977    sub getCOREHANDLE {
978      my $self = shift;
979      return $self->{_COREHANDLE};
980    }
981    
982    sub dropDb {
983      my $self = shift;
984      my $storage = $self->_getSubLayerHandle();
985      return $storage->dropDb();
986    }
987    
988    sub testAvailability {
989      my $self = shift;
990      my $storage = $self->_getSubLayerHandle();
991      return $storage->testAvailability();
992    }
993    
994    sub disconnect2 {
995      my $self = shift;
996      my $storage = $self->_getSubLayerHandle();
997      print "DISC!", "\n";
998    
999      my $storage_ll = $storage->{_COREHANDLE};
1000      $storage_ll->disconnect();
1001      
1002      print Dumper($storage);
1003      exit;
1004      
1005      #$self->{_COREHANDLE}
1006      #$storage->disconnect();
1007      $self->{dataStorageLayer}->disconnect();
1008    }
1009    
1010    
1011    sub createNode {
1012      my $self = shift;
1013      my $classname = shift;
1014    
1015      my $obj = $classname->new();
1016      
1017      my $attr_options = Class::Tangram::attribute_options($classname);
1018      #print "Attribute Options: " . Dumper($attr_options);
1019    
1020      my $attr_types = Class::Tangram::attribute_types($classname);
1021      #print "Attribute Types: " . Dumper($attr_types);
1022      
1023      foreach(keys %{$attr_types}) {
1024        if($attr_types->{$_} eq 'string') {
1025          $obj->{$_} = '';
1026        } elsif($attr_types->{$_} eq 'int') {
1027          $obj->{$_} = 0;
1028        } elsif($attr_types->{$_} eq 'real') {
1029          $obj->{$_} = 0;
1030        } elsif($attr_types->{$_} eq 'rawdatetime') {
1031          $obj->{$_} = '0000-00-00 00:00:00';
1032        } elsif($attr_types->{$_} eq 'ref') {
1033          if($attr_options->{$_}->{class}) {
1034            # HACK!!!
1035            # STANDALONE Objects (objects which make sense to instanciat alone) should not created automaticly
1036            # because they maybe exists and should only be SETTED not CREATED!
1037            # TODO: Create a flag at the scheme for that reason!
1038            #   (e.g child_node => 1 for child-nodes only like e.g. UserData)
1039            if($attr_options->{$_}->{class} eq 'NetPerson' || $attr_options->{$_}->{class} eq 'Event') {
1040              #$obj->{$_} = undef();
1041            } else {
1042              $obj->{$_} = $self->createNode($attr_options->{$_}->{class});
1043            }
1044          } else {
1045            #$obj->{$_} = undef();
1046          }
1047        } elsif($attr_types->{$_} eq 'iarray') {
1048            $obj->{$_} = [ ];
1049        } elsif($attr_types->{$_} eq 'hash') {
1050            $obj->{$_} = {  };
1051        } elsif($attr_types->{$_} eq 'flat_hash') {
1052            $obj->{$_} = { };
1053        }
1054      }
1055      
1056      #print "New Object: " . Dumper($obj);
1057      
1058      return $obj;
1059    }
1060    
1061    
1062      sub insertChildNode {
1063        my $self = shift;
1064        my $child_entry = shift;
1065        my $query_args = shift;
1066        
1067        my $core = $self->{_COREHANDLE};
1068        my $nodename = $query_args->{nodename};
1069        
1070        # get parent object
1071        my $query = {
1072              node => $query_args->{parent}->{nodename},
1073              options => { GUID => $query_args->{parent}->{guid}, },
1074              };
1075        my $cursor = $self->sendQuery($query);
1076        my $parent = $cursor->getNextEntry();
1077    
1078        # debug
1079        #print "Parent_org: " . Dumper($parent);
1080            
1081        # Create child node object if isn't already done
1082        # ($child_entry have to be the class name then...)
1083        if(!ref($child_entry)) {
1084          $child_entry = $self->createNode($child_entry);
1085          # it could be insert 'manually' or will be insert 'transparent' if parent will be updated
1086          #$core->insert($child_entry);
1087          #print "Create child object [$nodename]: " . Dumper($child_entry);
1088        }
1089    
1090        # get reference of tied node (seems, only on Linux node's are tied!!)
1091        my $tied_node = tied $parent->{$nodename};
1092    
1093        # insert/change child entry at parent
1094        #print "reference: " . ref($parent->{$nodename}) . "\n";
1095        if(ref($parent->{$nodename}) eq 'ARRAY') {
1096          # (seems, only on Linux node's are tied!!)
1097          if($tied_node) {
1098            # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type,
1099            # so a 'PUSH' is not implemented (which could be then done transparently)
1100            my $array = $tied_node->FETCH;
1101            push @$array, $child_entry;
1102            $tied_node->STORE($array);
1103            # node will be normaly untied at 'STORE'
1104            if(tied $parent->{$nodename}) { print "already tied !!\n"; }
1105            else { undef $tied_node; }
1106          } else {
1107            push @{$parent->{$nodename}}, $child_entry;
1108          }
1109        }
1110        elsif(ref($parent->{$nodename}) eq 'HASH') {
1111          if(my $key = $query_args->{hash_key}) {
1112            # (seems, only on Linux node's are tied!!)
1113            if($tied_node) {
1114              # same problem as with 'ARRAY':
1115              # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type.
1116              my $hash = $tied_node->FETCH;
1117              $hash->{$key} = $child_entry;
1118              $tied_node->STORE($hash);
1119              # node will be normaly untied at 'STORE'
1120              if(tied $parent->{$nodename}) { print "already tied !!\n"; }
1121              else { undef $tied_node; }
1122            } else {
1123              $parent->{$nodename}->{$key} = $child_entry;
1124            }
1125          } else {
1126           print "ERROR: No HASH KEY given, so not able to insert hash entry!";
1127          }
1128        }
1129        else {
1130          $parent->{$nodename} = $child_entry;
1131        }
1132    
1133        # debug
1134        #print "Parent_new: " . Dumper($parent);
1135        
1136        # save parent
1137        $core->update($parent);
1138        
1139        # debug
1140        #print "Saved Parent: ". Dumper($parent);
1141        
1142        return $child_entry;
1143      }
1144    
1145    
1146  1;  1;
1147    __END__
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