/[cvs]/nfo/perl/libs/Data/Storage/Handler/Tangram.pm
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revision 1.16 by joko, Wed Dec 11 06:54:10 2002 UTC revision 1.38 by joko, Tue May 13 16:38:38 2003 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.38  2003/05/13 16:38:38  joko
7    #  problems with "tied" on 5.6.1/win32
8    #
9    #  Revision 1.37  2003/05/10 17:37:39  jonen
10    #  corrected last commit
11    #
12    #  Revision 1.36  2003/05/10 17:31:18  jonen
13    #  + added new functions related to 'create' item
14    #   - createNode()
15    #     # creates non-persistent 'deep dummy filled' object
16    #   - insertChildNode()
17    #     # inserts child node at given parent (child node haven't to exists,
18    #         createNode will be injected transparently)
19    #
20    #  Revision 1.35  2003/04/19 16:09:48  jonen
21    #  + added operator dispatching (currently for getting ref-type) at 'getListFiltered'
22    #
23    #  Revision 1.34  2003/04/11 01:18:53  joko
24    #  sendQuery:
25    #  + introduced crud action 'DELETE'
26    #
27    #  Revision 1.33  2003/04/09 06:07:43  joko
28    #  revamped 'sub sendQuery'
29    #
30    #  Revision 1.32  2003/04/08 22:52:22  joko
31    #  modified 'querySchema': better behaviour regarding filtering result
32    #
33    #  Revision 1.31  2003/04/05 21:24:09  joko
34    #  modified 'sub getChildNodes': now contains code from 'querySchema'
35    #
36    #  Revision 1.30  2003/03/27 15:31:14  joko
37    #  fixes to modules regarding new namespace(s) below Data::Mungle::*
38    #
39    #  Revision 1.29  2003/02/21 01:47:18  joko
40    #  purged old code
41    #  minor cosmetics
42    #
43    #  Revision 1.28  2003/02/20 20:20:26  joko
44    #  tried to get auto-disconnect working again - failed with that
45    #
46    #  Revision 1.27  2003/01/31 06:30:59  joko
47    #  + enabled 'sendQuery'
48    #
49    #  Revision 1.26  2003/01/30 22:29:47  joko
50    #  + fixed module usage (removed dependency on 'libp.pm')
51    #
52    #  Revision 1.25  2003/01/19 02:30:05  joko
53    #  + fix: modified call to '_initSchema'
54    #
55    #  Revision 1.24  2002/12/22 14:13:01  joko
56    #  + sub dropDb
57    #
58    #  Revision 1.23  2002/12/19 16:31:53  joko
59    #  +- renamed sub to 'rebuildDb'
60    #
61    #  Revision 1.22  2002/12/18 22:28:16  jonen
62    #  + added extended logging at 'getObjectByGuid()'
63    #
64    #  Revision 1.21  2002/12/16 22:20:49  jonen
65    #  + fixed bug at 'getObjectByGuid()'
66    #
67    #  Revision 1.20  2002/12/16 20:49:17  jonen
68    #  + added sub 'getObjectByGuid()'
69    #  + added functionality to use 'getObjectByGuid' at 'getObjectAsHash()'
70    #
71    #  Revision 1.19  2002/12/16 06:46:09  joko
72    #  + attempt to introduce a generic '_patchSchema' - cancelled!
73    #
74    #  Revision 1.18  2002/12/13 21:48:07  joko
75    #  + fix to 'sub sendQuery'
76    #
77    #  Revision 1.17  2002/12/12 02:51:09  joko
78    #  + cosmetics
79    #
80  #  Revision 1.16  2002/12/11 06:54:10  joko  #  Revision 1.16  2002/12/11 06:54:10  joko
81  #  + fix: encapsulated object-loading inside an 'eval'  #  + fix: encapsulated object-loading inside an 'eval'
82  #  #
83  #  Revision 1.15  2002/12/05 13:55:21  joko  #  Revision 1.15  2002/12/05 13:55:21  joko
84  #  + now utilizing 'object2hash' instead of 'var_deref'  #  + now utilizing 'expand' instead of 'var_deref'
85  #  + played around with having fresh-objects - no progress....  #  + played around with having fresh-objects - no progress....
86  #  #
87  #  Revision 1.14  2002/12/05 09:40:30  jonen  #  Revision 1.14  2002/12/05 09:40:30  jonen
# Line 80  use warnings; Line 154  use warnings;
154  use base ("Data::Storage::Handler");  use base ("Data::Storage::Handler");
155  use base ("Data::Storage::Handler::Abstract");  use base ("Data::Storage::Handler::Abstract");
156    
157  use Tangram;  
158  use Data::Dumper;  use Data::Dumper;
159  use libp qw( getNewPerlObjectByPkgName );  use Tangram;
 use Data::Storage::Result::Tangram;  
 use Data::Compare::Struct qw( isEmpty );  
 use Data::Transform::Deep qw( object2hash );  
 use Data::Transform::Encode qw( var2utf8 );  
160    
161    use DesignPattern::Object;
162    use Data::Storage::Result::Tangram;
163    use Data::Mungle::Compare::Struct qw( isEmpty );
164    use Data::Mungle::Transform::Deep qw( expand deep_copy merge_to );
165    
166  # get logger instance  # get logger instance
167  my $logger = Log::Dispatch::Config->instance;  my $logger = Log::Dispatch::Config->instance;
# Line 108  sub _initSchema { Line 182  sub _initSchema {
182    my $self = shift;    my $self = shift;
183    $logger->debug( __PACKAGE__ . "->_initSchema()" );    $logger->debug( __PACKAGE__ . "->_initSchema()" );
184    #if (!$schema_tangram) {    #if (!$schema_tangram) {
185      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} } );
186        my $obj = DesignPattern::Object->fromPackage($self->{locator}->{schema}, { 'EXPORT_OBJECTS' => $self->{locator}->{classnames}, 'want_transactions' => $self->{locator}->{want_transactions} } );
187      $schema_tangram = $obj->getSchema();      $schema_tangram = $obj->getSchema();
188    #}    #}
189    if (!$schema_tangram) {    if (!$schema_tangram) {
190      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );
191      return 0;      return 0;
192    }    }
193      #$self->_patchSchema();
194    return 1;    return 1;
195  }  }
196    
197    sub _patchSchema {
198      my $self = shift;
199      foreach (keys %{$schema_tangram->{classes}}) {
200        next if $schema_tangram->{classes}->{$_}->{abstract};
201        #next if ($_ ne 'TsBankAccount');
202        #$_ ne 'AbstractAccount' &&
203        print "class: $_", "\n";
204    #print Dumper($schema_tangram->{classes}->{$_});
205        # create new string property named 'guid'
206        my $tstring = Tangram::String->new();
207        $tstring->{name} = $tstring->{col} = 'guid';
208        # inject property into schema
209        #$schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields}->{string}->{$tstring->{name}} = $tstring;
210        print Dumper($schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields});
211      }
212    }
213    
214  sub connect {  sub connect {
215    
216      my $self = shift;      my $self = shift;
217            
218      my $dsn = shift;      my $dsn = shift;
219    
220    #print Dumper($self);
221    #exit;
222    
223        # TODO: re-enable
224      $dsn ||= $self->{locator}->{dbi}->{dsn};      $dsn ||= $self->{locator}->{dbi}->{dsn};
       
225      $logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );      $logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );
226            
227      #my $storage = Tangram::Relational->connect( $schema, $dsn );      #my $storage = Tangram::Relational->connect( $schema, $dsn );
# Line 136  sub connect { Line 233  sub connect {
233  #      return;  #      return;
234  #    }  #    }
235    
236      return unless $self->_initSchema();      #return unless $self->_initSchema();
237        $self->_initSchema();
238    
239      # create the main tangram storage object      # create the main tangram storage object
240      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
# Line 163  sub connect { Line 261  sub connect {
261  sub getChildNodes {  sub getChildNodes {
262    
263    my $self = shift;    my $self = shift;
264    my @nodes;    my $mode = shift;
265      my $filter = shift;
266      
267      $mode ||= 'core';
268      $filter ||= 'all';
269      
270      $logger->debug( __PACKAGE__ . "->getChildNodes($mode)" );
271    
272    $logger->debug( __PACKAGE__ . "->getChildNodes()" );    if ($mode eq 'core') {
273    
274    # create new DBI - Data::Storage - object from already connected DBI::db - handle inside the current COREHANDLE      my @nodes;
275    #my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} });      
276    #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
277          #my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} });
278    # todo: should we retrieve information from the schema here      #my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} );
279    # rather than poorly getting table names from underlying dbi?      
280    my $storage = $self->_getSubLayerHandle();      # todo: should we retrieve information from the schema here
281    @nodes = @{$storage->getChildNodes()};      # rather than poorly getting table names from underlying dbi?
282    #$storage->_configureCOREHANDLE();      my $storage = $self->_getSubLayerHandle();
283  #print "getchildnodes\n";      @nodes = @{$storage->getChildNodes()};
284  #print Dumper($self);      #$storage->_configureCOREHANDLE();
285    #if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {    #print "getchildnodes\n";
286      #print Dumper($self);
287        #if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {
288        
289        # TODO: REVIEW
290        #$storage->disconnect();
291        
292        $self->{meta}->{childnodes} = \@nodes;
293    
294        return \@nodes;
295        
296    # TODO: REVIEW    } elsif ($mode eq 'root') {
297    #$storage->disconnect();      
298        # FIXME: this will return *all* known classes to 'Class::Tangram',
299        # which might not be what you expect since more than one instance
300        # of Tangram may be in memory and Class::Tangram seems to
301        # offer no methods to determine this or filter its result(s) according
302        # to a specific database.
303        my @object_names = Class::Tangram::known_classes();
304        my @concret_names;
305        my $o_cnt;
306        foreach (sort @object_names) {
307          push @concret_names, $_  if (!Class::Tangram::class_is_abstract($_));
308          $o_cnt++;
309        }
310    
311        if ($filter eq 'all') {
312          return \@object_names;
313        } elsif ($filter eq 'concrete') {
314          return \@concret_names;
315        }
316        
317    $self->{meta}->{childnodes} = \@nodes;    }
318        
   return \@nodes;  
319    
320  }  }
321    
   
322  sub testIntegrity {  sub testIntegrity {
323    
324    my $self = shift;    my $self = shift;
# Line 263  sub configureCOREHANDLE { Line 392  sub configureCOREHANDLE {
392    $logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );    $logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );
393    
394    #my $subLayer = $self->_getSubLayerHandle();    #my $subLayer = $self->_getSubLayerHandle();
395      #print Dumper($self);
396      #exit;
397    
398    # apply configured modifications    # apply configured modifications
399      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {
# Line 328  sub retreatSchema { Line 459  sub retreatSchema {
459    return $ok;    return $ok;
460  }  }
461    
462  sub rebuildDbAndSchema {  sub rebuildDb {
463    my $self = shift;    my $self = shift;
464    $logger->info( __PACKAGE__ . "->rebuildDbAndSchema()" );    $logger->info( __PACKAGE__ . "->rebuildDb()" );
465    my @results;    my @results;
466    
467    # sum up results (bool (0/1)) in array    # sum up results (bool (0/1)) in array
# Line 370  sub getListFiltered { Line 501  sub getListFiltered {
501    my @results;    my @results;
502    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );
503    
504    #print Dumper($filters);  #print Dumper($filters);
505        
506    my @tfilters;    my @tfilters;
507        
# Line 392  sub getListFiltered { Line 523  sub getListFiltered {
523    #    objects => $objects,    #    objects => $objects,
524    #  );    #  );
525        
526      # HACK: build eval-string (sorry) to get filtered list - please give advice here      # TODO: is_op?
527      push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";      # dispatch un-common operators if exists
528        if($filter->{op} eq "ref") {
529          push @tfilters, 'ref($remote->{' . $filter->{key} . '})' . " eq '$filter->{val}'";
530        } else {
531          # HACK: build eval-string (sorry) to get filtered list - please give advice here
532          push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
533        }
534    
535    }    }
536    
# Line 409  sub getListFiltered { Line 546  sub getListFiltered {
546    # HACK: build eval-string (sorry) to get filtered list - please give advice here    # HACK: build eval-string (sorry) to get filtered list - please give advice here
547    my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';    my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';
548        
549      #print "eval: $evalstring", "\n";
550      
551    # get filtered list/set    # get filtered list/set
552    @results = eval($evalstring);    @results = eval($evalstring);
553    die $@ if $@;    die $@ if $@;
# Line 426  sub createCursor { Line 565  sub createCursor {
565    
566  sub createSet {  sub createSet {
567    my $self = shift;    my $self = shift;
568    #print "-" x 80, "\n";
569    #print Dumper(@_);
570    my @objects = @_;    my @objects = @_;
571    my $rh = Set::Object->new();    my $rh = Set::Object->new();
572    foreach (@objects) {    foreach (@objects) {
573      #print Dumper($_);      if (!isEmpty($_)) {
574      $rh->insert($_) if !isEmpty($_);  #print Dumper($_);
575          $rh->insert($_);
576        }
577    }    }
578    #print Dumper($rh->members());    #print Dumper($rh->members());
579    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
# Line 440  sub createSet { Line 583  sub createSet {
583  sub sendQuery {  sub sendQuery {
584    my $self = shift;    my $self = shift;
585    my $query = shift;    my $query = shift;
   #my $sql = "SELECT cs FROM $self->{metainfo}->{$descent}->{node} WHERE $self->{metainfo}->{$descent}->{IdentProvider}->{arg}='$self->{entry}->{source}->{ident}';";  
   #my $result = $self->{metainfo}->{$descent}->{storage}->sendCommand($sql);  
586    
587    #print Dumper($query);    #print Dumper($query);
588    
589    # HACK: special case: querying by id does not translate into a common tangram query    # type = ITEM|LIST|TRANSPARENT
590    # just load the object by given id(ent)    my $type = '';
591    if ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq') {    # mode = OID|SPECIAL
592      #print "LOAD!!!", "\n";    my $mode = '';
593      #exit;    my $ident = '';
594      #return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );    my $crud = '';
595      my $ident = $query->{criterias}->[0]->{val};    
596  #print "load obj", "\n";    
597      #return $self->createSet() if $ident == 5;    # dispatch type and mode
598      my $object = $self->{_COREHANDLE}->load($ident);    
599  #print "get id", "\n";      # defaults - 1
600      my $oid = $self->{_COREHANDLE}->id($object);      if ($query->{options}) {
601      return $self->createSet($object);        $crud = $query->{options}->{crud};
602      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );        $crud ||= $query->{options}->{action};
603    }      }
604    
605    die("This should not be reached for now - redirect to \$self->getListFiltered() here!");      # defaults - 2
606        $type ||= 'TRANSPARENT';
607    # TODO: do a common tangram query here      $crud ||= 'RETRIEVE';
608    
609    my @crits;      if ($query->{options}->{OID}) {
610    foreach (@{$query->{criterias}}) {        $type = 'ITEM';
611      my $op = '';        $mode = 'OID';
612      $op = '=' if lc $_->{op} eq 'eq';        $ident = $query->{options}->{OID};
613      push @crits, "$_->{key}$op'$_->{val}'";      
614    }      } elsif (my $guid = $query->{options}->{GUID}) {
615    my $subnodes = {};        $type = 'TRANSPARENT';
616    map { $subnodes->{$_}++ } @{$query->{subnodes}};        $query->{criterias} = [ { key => 'guid', op => 'eq', val => $guid } ];    
617    # HACK: this is hardcoded ;(    expand possibilities!  
618    #my $crit = join(' AND ', @crits);      # if operator is different (dispatcher for 'getListFiltered')
619    #my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit);      } elsif (my $op = $query->{options}->{op}) {
620    #return $self->sendCommand($sql);        $type = 'TRANSPARENT';
621    #my $h = $self->{COREHANDLE}->remote($query->{node});        $query->{criterias} = [ { key => $query->{options}->{meta_label}, op => $op, val => $query->{options}->{meta_value} } ];    
622    #my $res = $self->{COREHANDLE}->select($h, $h->{);  
623    return $self->createCursor($query->{node});      }
624      
625        # HACK: special case: querying by id does not translate into a common tangram query
626        # just load the object by given identifier (OID) named 'id' - this is required by Data::Transfer::Sync!
627        if ($query->{criterias} && ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq')) {
628          $type = 'ITEM';
629          $mode = 'SPECIAL.SYNC';
630          $ident = $query->{criterias}->[0]->{val};
631        }
632      
633    
634      # execute query
635      my $result;
636    
637      if ($type eq 'ITEM' && $ident) {
638    
639        if ($mode eq 'OID') {    
640          # TODO: review this case!
641          $result = $self->getObject($ident, $query->{options});
642        
643        } elsif ($mode eq 'SPECIAL.SYNC') {
644    
645          # V1 - failed
646          #return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );
647      
648          # hmm....
649          #return $self->createSet() if $ident == 5;
650          
651          # Unload single object before doing any further operations to
652          # expect a "fresh" object from orm when performing the next calls.
653          $self->{_COREHANDLE}->unload($ident);
654          
655          # Load object from orm.
656          my $object = $self->{_COREHANDLE}->load($ident);
657      
658          # determine object identifier (OID)
659          my $oid = $self->{_COREHANDLE}->id($object);
660          
661          # encapsulate into result/response container and return this one
662          $result = $self->createSet($object);
663          
664          # debugging
665          #$result = $self->createSet( $self->{COREHANDLE}->load('300090018') );
666    
667        }
668        
669      
670      } elsif ($type eq 'TRANSPARENT') {
671    
672        if ($crud eq 'RETRIEVE') {
673    
674          my $list = $self->getListFiltered($query->{node}, $query->{criterias});
675          #return $self->createSet($object);
676          #return $self->createSet($list);
677          return $self->createSet(@$list);
678        
679          #die("This should not be reached for now - redirect to \$self->getListFiltered() here!");
680        
681          # try a generic tangram query here
682          # TODO: try to place an oql on top of that (search.cpan.org!)
683          my @crits;
684          foreach (@{$query->{criterias}}) {
685            my $op = '';
686            $op = '=' if lc $_->{op} eq 'eq';
687            push @crits, "$_->{key}$op'$_->{val}'";
688          }
689          my $subnodes = {};
690          map { $subnodes->{$_}++ } @{$query->{subnodes}};
691          # HACK: this is hardcoded ;(    expand possibilities!
692          #my $crit = join(' AND ', @crits);
693          #my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit);
694          #return $self->sendCommand($sql);
695          #my $h = $self->{COREHANDLE}->remote($query->{node});
696          #my $res = $self->{COREHANDLE}->select($h, $h->{);
697          $result = $self->createCursor($query->{node});
698    
699        } elsif ($crud eq 'UPDATE') {
700    
701          # Patch current query to be a loader (e.g. change action, remove payload) ...
702          my $childquery = deep_copy($query);
703          $childquery->{options}->{crud} = 'RETRIEVE';
704          delete $childquery->{payload};
705    
706          # ... to use it to fetch a fresh object using ourselves (sendQuery).
707          my $cursor = $self->sendQuery($childquery);
708          my $status = $cursor->getStatus();
709          my $object = $cursor->getNextEntry();
710    
711          # Merge values and apply value modifiers.
712          my $options = { utf8 => 1, php => 1 };
713          merge_to($object, $query->{payload}, $options);
714    
715          # Execute update operation at orm.
716          $self->update($object);
717        
718        } elsif ($crud eq 'DELETE') {
719    
720          # Patch current query to be a loader (e.g. change action) ...
721          my $childquery = deep_copy($query);
722          $childquery->{options}->{crud} = 'RETRIEVE';
723    
724          # ... to use it to fetch a fresh object using ourselves (sendQuery).
725          my $cursor = $self->sendQuery($childquery);
726          my $status = $cursor->getStatus();
727          my $object = $cursor->getNextEntry();
728    
729          $self->erase($object);
730    
731        } elsif ($crud eq 'CREATE') {
732          
733          my $nodename = $query->{node};      
734          my $newnode = $self->createNode($nodename);
735          my $id = $self->{_COREHANDLE}->insert($newnode);
736      
737          print "Saved new node $nodename with GUID $newnode->{guid}, OID '$id': " . Dumper($newnode) . "\n";
738          
739          return $newnode;
740    
741        }
742    
743      }
744    
745      return $result;
746    
747  }  }
748    
749  sub eraseAll {  sub eraseAll {
# Line 503  sub getObject { Line 767  sub getObject {
767    
768    # TODO: create a deep_unload method (currently _all_ objects are unloaded)    # TODO: create a deep_unload method (currently _all_ objects are unloaded)
769    # unload($oid) will only unload object, not deep object hashes    # unload($oid) will only unload object, not deep object hashes
770    $self->{_COREHANDLE}->unload() if($options->{destroy});    $self->{_COREHANDLE}->unload() if ($options->{destroy});
771    
772    # TODO: review this    # TODO: review this
773    #if (!$self->{COREHANDLE}) { return; }    #if (!$self->{COREHANDLE}) { return; }
# Line 515  sub getObject { Line 779  sub getObject {
779    return $object if $object;    return $object if $object;
780  }  }
781    
782  sub getObjectAsHash {  sub getObjectByGuid_old {
783    my $self = shift;    my $self = shift;
784    my $oid = shift;    my $guid = shift;
785    my $options = shift;    my $options = shift;
786    my $obj = $self->getObject($oid, $options);    
787      # Guid and Classname is needed
788      if(!$guid || !$options->{classname}) {
789       $logger->error( __PACKAGE__ . "->getObjectByGuid: No 'guid' OR no Classname in options hash was given but needed!" );
790        return;
791      }
792      
793      # TODO: create a deep_unload method (currently _all_ objects are unloaded)
794      # unload($oid) will only unload object, not deep object hashes
795      $self->{_COREHANDLE}->unload() if ($options->{destroy});
796    
797      # search for object with given Classname and Guid
798      my $obj_tmp = $self->{_COREHANDLE}->remote($options->{classname});
799      my @result = $self->{_COREHANDLE}->select($obj_tmp, $obj_tmp->{guid} eq $guid);
800      
801      # we searched for global unique identifer of some object,
802      # so I think we can trust there would be only one result
803      if($result[0]) {
804        return $result[0];
805      } else {
806        $logger->error( __PACKAGE__ . "->getObjectByGuid: No Object with Classname $options->{classname} and GUID $guid found!" );
807        return;
808      }
809      
810    }
811    
812    sub getObjectAsHash_old {
813      my $self = shift;
814      my $oid = shift;
815      my $options = shift;  
816      my $obj;
817      
818      if($options->{guid}) {
819        $obj = $self->getObjectByGuid($oid, $options);
820      } else {
821        $obj = $self->getObject($oid, $options);
822      }
823        
824    # build options (a callback to unload autovivified objects) for 'expand'    # build options (a callback to unload autovivified objects) for 'expand'
825    # TODO: use $logger to write to debug here!    # TODO: use $logger to write to debug here!
826    my $cb; # = sub {};    my $cb; # = sub {};
827    
828      # deactivated way to get rid of used instances, if requested
829  =pod  =pod
830    if ($options->{destroy}) {      if ($options->{destroy}) {
831      $options->{cb}->{destroy} = sub {        $options->{cb}->{destroy} = sub {
832        print "================ DESTROY", "\n";          print "================ DESTROY", "\n";
833        my $object = shift;          my $object = shift;
834        #print Dumper($object);          #print Dumper($object);
835        $self->{_COREHANDLE}->unload($object);          $self->{_COREHANDLE}->unload($object);
836        #undef($object);          #undef($object);
837      };        };
838    }      }
839  =cut  =cut
840    
841    my $hash = object2hash($obj, $options);    my $hash = expand($obj, $options);
842    #$options->{cb}->{destroy}->($obj);  
843    #$self->{_COREHANDLE}->unload($obj);    # old (unsuccessful) attempts to get rid of used instances, if requested
844      
845    # convert values in hash to utf8 to be ready for (e.g.) encapsulation in XML      # V1:
846    # now done in object2hash      #$options->{cb}->{destroy}->($obj);
847    #var2utf8($hash) if ($options->{utf8});      #$self->{_COREHANDLE}->unload($obj);
848        
849    # old (wrong) attempts to get rid of used instances, if requested      # V2:
850      #$obj->clear_refs;      #$obj->clear_refs;
851      #$self->{COREHANDLE}->unload($obj) if($options->{destroy});      #$self->{COREHANDLE}->unload($obj) if($options->{destroy});
852      #$obj->DESTROY;      #$obj->DESTROY;
# Line 562  sub getCOREHANDLE { Line 864  sub getCOREHANDLE {
864    return $self->{_COREHANDLE};    return $self->{_COREHANDLE};
865  }  }
866    
867    sub dropDb {
868      my $self = shift;
869      my $storage = $self->_getSubLayerHandle();
870      return $storage->dropDb();
871    }
872    
873    sub testAvailability {
874      my $self = shift;
875      my $storage = $self->_getSubLayerHandle();
876      return $storage->testAvailability();
877    }
878    
879    sub disconnect2 {
880      my $self = shift;
881      my $storage = $self->_getSubLayerHandle();
882      print "DISC!", "\n";
883    
884      my $storage_ll = $storage->{_COREHANDLE};
885      $storage_ll->disconnect();
886      
887      print Dumper($storage);
888      exit;
889      
890      #$self->{_COREHANDLE}
891      #$storage->disconnect();
892      $self->{dataStorageLayer}->disconnect();
893    }
894    
895    
896    sub createNode {
897      my $self = shift;
898      my $classname = shift;
899    
900      my $obj = $classname->new();
901      
902      my $attr_options = Class::Tangram::attribute_options($classname);
903      #print "Attribute Options: " . Dumper($attr_options);
904    
905      my $attr_types = Class::Tangram::attribute_types($classname);
906      #print "Attribute Types: " . Dumper($attr_types);
907      
908      foreach(keys %{$attr_types}) {
909        if($attr_types->{$_} eq 'string') {
910          $obj->{$_} = '';
911        } elsif($attr_types->{$_} eq 'int') {
912          $obj->{$_} = 0;
913        } elsif($attr_types->{$_} eq 'real') {
914          $obj->{$_} = 0;
915        } elsif($attr_types->{$_} eq 'rawdatetime') {
916          $obj->{$_} = '0000-00-00 00:00:00';
917        } elsif($attr_types->{$_} eq 'ref') {
918          if($attr_options->{$_}->{class}) {
919            $obj->{$_} = $self->createNode($attr_options->{$_}->{class});
920          } else {
921            #$obj->{$_} = undef();
922          }
923        } elsif($attr_types->{$_} eq 'iarray') {
924            $obj->{$_} = [ ];
925        } elsif($attr_types->{$_} eq 'hash') {
926            $obj->{$_} = {  };
927        } elsif($attr_types->{$_} eq 'flat_hash') {
928            $obj->{$_} = { };
929        }
930      }
931      
932      #print "New Object: " . Dumper($obj);
933      
934      return $obj;
935    }
936    
937    
938      sub insertChildNode {
939        my $self = shift;
940        my $child_entry = shift;
941        my $query_args = shift;
942        
943        my $core = $self->{_COREHANDLE};
944        my $nodename = $query_args->{nodename};
945        
946        # get parent object
947        my $query = {
948              node => $query_args->{parent}->{nodename},
949              options => { GUID => $query_args->{parent}->{guid}, },
950              };
951        my $cursor = $self->sendQuery($query);
952        my $parent = $cursor->getNextEntry();
953    
954        # debug
955        #print "Parent_org: " . Dumper($parent);
956            
957        # Create child node object if isn't already done
958        # ($child_entry have to be the class name then...)
959        if(!ref($child_entry)) {
960          $child_entry = $self->createNode($child_entry);
961          # it could be insert 'manually' or will be insert 'transparent' if parent will be updated
962          #$core->insert($child_entry);
963          #print "Create child object [$nodename]: " . Dumper($child_entry);
964        }
965    
966        # get reference of tied node (seems, only on Linux node's are tied!!)
967        my $tied_node = tied $parent->{$nodename};
968    
969        # insert/change child entry at parent
970        #print "reference: " . ref($parent->{$nodename}) . "\n";
971        if(ref($parent->{$nodename}) eq 'ARRAY') {
972          # (seems, only on Linux node's are tied!!)
973          if($tied_node) {
974            # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type,
975            # so a 'PUSH' is not implemented (which could be then done transparently)
976            my $array = $tied_node->FETCH;
977            push @$array, $child_entry;
978            $tied_node->STORE($array);
979            # node will be normaly untied at 'STORE'
980            if(tied $parent->{$nodename}) { print "already tied !!\n"; }
981            else { undef $tied_node; }
982          } else {
983            push @{$parent->{$nodename}}, $child_entry;
984          }
985        }
986        elsif(ref($parent->{$nodename}) eq 'HASH') {
987          if(my $key = $query_args->{hash_key}) {
988            # (seems, only on Linux node's are tied!!)
989            if($tied_node) {
990              # same problem as with 'ARRAY':
991              # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type.
992              my $hash = $tied_node->FETCH;
993              $hash->{$key} = $child_entry;
994              $tied_node->STORE($hash);
995              # node will be normaly untied at 'STORE'
996              if(tied $parent->{$nodename}) { print "already tied !!\n"; }
997              else { undef $tied_node; }
998            } else {
999              $parent->{$nodename}->{$key} = $child_entry;
1000            }
1001          } else {
1002           print "ERROR: No HASH KEY given, so not able to insert hash entry!";
1003          }
1004        }
1005        else {
1006          $parent->{$nodename} = $child_entry;
1007        }
1008    
1009        # debug
1010        #print "Parent_new: " . Dumper($parent);
1011        
1012        # save parent
1013        $core->update($parent);
1014        
1015        # debug
1016        #print "Saved Parent: ". Dumper($parent);
1017        
1018        return $child_entry;
1019      }
1020    
1021    
1022  1;  1;
1023    __END__
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