/[cvs]/nfo/perl/libs/Data/Storage/Handler/Tangram.pm
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revision 1.28 by joko, Thu Feb 20 20:20:26 2003 UTC revision 1.41 by joko, Sun Jun 29 02:03:45 2003 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.41  2003/06/29 02:03:45  joko
7    #  fix:? initialize schema on startup
8    #
9    #  Revision 1.40  2003/06/25 22:57:54  joko
10    #  major rework of "sub sendQuery / sub getListFiltered": now should be capable of "sorting"
11    #
12    #  Revision 1.39  2003/06/06 11:40:40  jonen
13    #  fixed bug at 'getFilteredList'
14    #
15    #  Revision 1.38  2003/05/13 16:38:38  joko
16    #  problems with "tied" on 5.6.1/win32
17    #
18    #  Revision 1.37  2003/05/10 17:37:39  jonen
19    #  corrected last commit
20    #
21    #  Revision 1.36  2003/05/10 17:31:18  jonen
22    #  + added new functions related to 'create' item
23    #   - createNode()
24    #     # creates non-persistent 'deep dummy filled' object
25    #   - insertChildNode()
26    #     # inserts child node at given parent (child node haven't to exists,
27    #         createNode will be injected transparently)
28    #
29    #  Revision 1.35  2003/04/19 16:09:48  jonen
30    #  + added operator dispatching (currently for getting ref-type) at 'getListFiltered'
31    #
32    #  Revision 1.34  2003/04/11 01:18:53  joko
33    #  sendQuery:
34    #  + introduced crud action 'DELETE'
35    #
36    #  Revision 1.33  2003/04/09 06:07:43  joko
37    #  revamped 'sub sendQuery'
38    #
39    #  Revision 1.32  2003/04/08 22:52:22  joko
40    #  modified 'querySchema': better behaviour regarding filtering result
41    #
42    #  Revision 1.31  2003/04/05 21:24:09  joko
43    #  modified 'sub getChildNodes': now contains code from 'querySchema'
44    #
45    #  Revision 1.30  2003/03/27 15:31:14  joko
46    #  fixes to modules regarding new namespace(s) below Data::Mungle::*
47    #
48    #  Revision 1.29  2003/02/21 01:47:18  joko
49    #  purged old code
50    #  minor cosmetics
51    #
52  #  Revision 1.28  2003/02/20 20:20:26  joko  #  Revision 1.28  2003/02/20 20:20:26  joko
53  #  tried to get auto-disconnect working again - failed with that  #  tried to get auto-disconnect working again - failed with that
54  #  #
# Line 123  use Tangram; Line 169  use Tangram;
169    
170  use DesignPattern::Object;  use DesignPattern::Object;
171  use Data::Storage::Result::Tangram;  use Data::Storage::Result::Tangram;
172  use Data::Compare::Struct qw( isEmpty );  use Data::Mungle::Compare::Struct qw( isEmpty );
173  use Data::Transform::Deep qw( expand );  use Data::Mungle::Transform::Deep qw( expand deep_copy merge_to );
 #use Data::Transform::Encode qw( var2utf8 );  
174    
175  # get logger instance  # get logger instance
176  my $logger = Log::Dispatch::Config->instance;  my $logger = Log::Dispatch::Config->instance;
# Line 148  sub _initSchema { Line 193  sub _initSchema {
193    #if (!$schema_tangram) {    #if (!$schema_tangram) {
194      #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} } );
195      my $obj = DesignPattern::Object->fromPackage($self->{locator}->{schema}, { 'EXPORT_OBJECTS' => $self->{locator}->{classnames}, 'want_transactions' => $self->{locator}->{want_transactions} } );      my $obj = DesignPattern::Object->fromPackage($self->{locator}->{schema}, { 'EXPORT_OBJECTS' => $self->{locator}->{classnames}, 'want_transactions' => $self->{locator}->{want_transactions} } );
196      $schema_tangram = $obj->getSchema();      $schema_tangram = $obj->getSchema() if $obj;
197    #}    #}
198    if (!$schema_tangram) {    if (!$schema_tangram) {
199      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{locator}->{schema}." );
200      return 0;      return 0;
201    }    }
202    #$self->_patchSchema();    #$self->_patchSchema();
# Line 197  sub connect { Line 242  sub connect {
242  #      return;  #      return;
243  #    }  #    }
244    
245      #return unless $self->_initSchema();      return unless $self->_initSchema();
246      $self->_initSchema();      #$self->_initSchema();
247    
248      # create the main tangram storage object      # create the main tangram storage object
249      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
# Line 225  sub connect { Line 270  sub connect {
270  sub getChildNodes {  sub getChildNodes {
271    
272    my $self = shift;    my $self = shift;
273    my @nodes;    my $mode = shift;
274      my $filter = shift;
275      
276      $mode ||= 'core';
277      $filter ||= 'all';
278      
279      $logger->debug( __PACKAGE__ . "->getChildNodes($mode)" );
280    
281    $logger->debug( __PACKAGE__ . "->getChildNodes()" );    if ($mode eq 'core') {
282    
283    # create new DBI - Data::Storage - object from already connected DBI::db - handle inside the current COREHANDLE      my @nodes;
284    #my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} });      
285    #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
286          #my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} });
287    # todo: should we retrieve information from the schema here      #my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} );
288    # rather than poorly getting table names from underlying dbi?      
289    my $storage = $self->_getSubLayerHandle();      # todo: should we retrieve information from the schema here
290    @nodes = @{$storage->getChildNodes()};      # rather than poorly getting table names from underlying dbi?
291    #$storage->_configureCOREHANDLE();      my $storage = $self->_getSubLayerHandle();
292  #print "getchildnodes\n";      @nodes = @{$storage->getChildNodes()};
293  #print Dumper($self);      #$storage->_configureCOREHANDLE();
294    #if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {    #print "getchildnodes\n";
295      #print Dumper($self);
296        #if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {
297        
298        # TODO: REVIEW
299        #$storage->disconnect();
300        
301        $self->{meta}->{childnodes} = \@nodes;
302    
303        return \@nodes;
304        
305    # TODO: REVIEW    } elsif ($mode eq 'root') {
306    #$storage->disconnect();      
307        # FIXME: this will return *all* known classes to 'Class::Tangram',
308        # which might not be what you expect since more than one instance
309        # of Tangram may be in memory and Class::Tangram seems to
310        # offer no methods to determine this or filter its result(s) according
311        # to a specific database.
312        my @object_names = Class::Tangram::known_classes();
313        my @concret_names;
314        my $o_cnt;
315        foreach (sort @object_names) {
316          push @concret_names, $_  if (!Class::Tangram::class_is_abstract($_));
317          $o_cnt++;
318        }
319    
320        if ($filter eq 'all') {
321          return \@object_names;
322        } elsif ($filter eq 'concrete') {
323          return \@concret_names;
324        }
325        
326    $self->{meta}->{childnodes} = \@nodes;    }
327        
   return \@nodes;  
328    
329  }  }
330    
   
331  sub testIntegrity {  sub testIntegrity {
332    
333    my $self = shift;    my $self = shift;
# Line 429  sub getListFiltered { Line 505  sub getListFiltered {
505    # redirect to unfiltered mode    # redirect to unfiltered mode
506    #return $self->getListUnfiltered(@_);    #return $self->getListUnfiltered(@_);
507    
508    my $nodename = shift;    my $in = {};
509    my $filters = shift;    $in->{nodename} = shift;
510      $in->{filters} = shift;
511      $in->{sorting} = shift;
512      
513    my @results;    my @results;
514    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $in->{nodename} . "' )" );
515    
516      #print Dumper($filters);
517    
518  #print Dumper($filters);    # 1. "Remote Object Handle" - get set of objects from odbms by object name
519      my $remote = $self->{_COREHANDLE}->remote($in->{nodename});
520        
521      # 2. Transfer $in to $orm_query
522      my $orm_query = {};
523      
524      # 2.a. Filters
525    my @tfilters;    my @tfilters;
526      my $orm_filter = undef;
527        
528    foreach my $filter (@$filters) {    foreach my $filter (@{$in->{filters}}) {
529        
530      # get filter - TODO: for each filter      # get filter - TODO: for each filter
531      #my $filter = $filters->[0];      #my $filter = $filters->[0];
532      
533      # build filter      # 1. The parts of a filter source entry
534      my $lexpr = $filter->{key};      my $lexpr = $filter->{key};
535      #my $op = $filter->{op};      #my $op = $filter->{op};
536      my $op = '=';      my $op = '=';
537      my $rexpr = $filter->{val};      my $rexpr = $filter->{val};
538      my $tight = 100;      my $tight = 100;
539    
540        # 2. Build filter target entry
541            
542    #  my $tfilter = Tangram::Filter->new(      # Test 1 - didn't work out!
543    #    expr => "t1.$lexpr $op '$rexpr'",      #  my $tfilter = Tangram::Filter->new(
544    #    tight => $tight,      #    expr => "t1.$lexpr $op '$rexpr'",
545    #    objects => $objects,      #    tight => $tight,
546    #  );      #    objects => $objects,
547          #  );
548      # HACK: build eval-string (sorry) to get filtered list - please give advice here  
549      push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";      my $orm_filter_tmp = undef;
550        # was:
551        # TODO: is_op?
552        # dispatch un-common operators if exists
553        if ($filter->{op} eq "ref") {
554          # do nothing, results will be filtered later cause 'tangram-filter' doesn't support 'ref' query
555          #print "Filter->op eq 'ref'.\n";
556          #push @tfilters, 'ref($remote->{' . $filter->{key} . '})' . " eq '$filter->{val}'";
557        } else {
558          # HACK: build eval-string (sorry) to get filtered list - please give advice here
559          #push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
560          # better: calculate expression right here!
561          #push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
562          
563          #print "key: ", $filter->{key}, "\n";
564          
565          my $left = $remote->{$filter->{key}};
566          #my $r = Tangram::Expr->new( 'string' => "'" . $filter->{val} . "'" );
567          my $right = $filter->{val};
568          my $op = $filter->{op};
569          $orm_filter_tmp = $left->$op($right);
570        }
571    
572        if (not $orm_filter) {
573          $orm_filter = $orm_filter_tmp;
574        } else {
575          $orm_filter = $orm_filter->and($orm_filter_tmp);
576        }
577    
578    }    }
579    
580    my $tfilter = join(' & ', @tfilters);    $orm_query->{filter} = $orm_filter;
581    
   # get set of objects from odbms by object name  
   my $remote = $self->{_COREHANDLE}->remote($nodename);  
     
582    # was:    # was:
583    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);  
584      # 2.b. sorting [new as of 2003-06-17]
585      if ($in->{sorting}) {
586        my $sorting_rules = [];
587        my $sorting_order = 'ASC';
588        foreach my $sorting_column (keys %{$in->{sorting}}) {
589          $sorting_order = $in->{sorting}->{$sorting_column} if $in->{sorting}->{$sorting_column};
590          push @$sorting_rules, Tangram::Expr->new( 'string' => $sorting_column );
591        }
592        $orm_query->{order} = $sorting_rules;
593        if ($sorting_order eq 'DESC') {
594          $orm_query->{desc} = 1;
595        }
596      }
597    
598    
599      # 3. build and issue query - return result as Tangram::Cursor
600      
601      # coerce hash into array (This is valid in Perl)
602      my @orm_query_args = %$orm_query;
603      # send query (arguments) to orm
604      @results = $self->{_COREHANDLE}->select($remote, @orm_query_args);
605      
606      #my $cursor = $self->{_COREHANDLE}->cursor($remote, @orm_query_args);
607      #return $cursor;
608      #print Dumper(@results);
609    
610    # is:    # is:
611    # 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
612    my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';      #my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . $sorting . ');';
613          #print "eval: $evalstring", "\n";
614    #print "eval: $evalstring", "\n";      # get filtered list/set
615          #@results = eval($evalstring);
616    # get filtered list/set      #die $@ if $@;
617    @results = eval($evalstring);  
618    die $@ if $@;  =pod
619      # filter results
620      if ($filters->[0]->{op} && ($filters->[0]->{op} eq "ref")) {
621          #print "Filter->op eq 'ref'.\n";
622          my $att_name = $filters->[0]->{key};
623          my $att_val = $filters->[0]->{val};
624          my @filtered;
625          foreach(@results) {
626            if(ref($_->{$att_name}) eq $att_val) {
627              push @filtered, $_;
628            }
629          }
630          @results = @filtered;
631      }
632    =cut
633    
634      #print "results: " . Dumper(\@results);
635        
636    return \@results;    return \@results;
637  }  }
# Line 507  sub createSet { Line 661  sub createSet {
661    return $result;    return $result;
662  }  }
663    
664    sub createResult {
665      my $self = shift;
666      my $rh = shift;
667      my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
668      return $result;
669    }
670    
671  sub sendQuery {  sub sendQuery {
672    my $self = shift;    my $self = shift;
673    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($sql);  
674    
675    #print Dumper($query);    #print Dumper($query);
676    
677    # HACK: special case: querying by id does not translate into a common tangram query    # type = ITEM|LIST|TRANSPARENT
678    # just load the object by given id(ent)    my $type = '';
679    if ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq') {    # mode = OID|SPECIAL
680      #print "LOAD!!!", "\n";    my $mode = '';
681      #exit;    my $ident = '';
682      #return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );    my $crud = '';
683      my $ident = $query->{criterias}->[0]->{val};    
684  #print "load obj", "\n";    
685      #return $self->createSet() if $ident == 5;    # dispatch type and mode
686      $self->{_COREHANDLE}->unload($ident);    
687      my $object = $self->{_COREHANDLE}->load($ident);      # defaults - 1
688  #print "get id", "\n";      if ($query->{options}) {
689      my $oid = $self->{_COREHANDLE}->id($object);        $crud = $query->{options}->{crud};
690  #print Dumper($object);        $crud ||= $query->{options}->{action};
691  #print "oid: $oid", "\n";      }
692      return $self->createSet($object);  
693      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );      # defaults - 2
694    }      $type ||= 'TRANSPARENT';
695        $crud ||= 'RETRIEVE';
696    my $list = $self->getListFiltered($query->{node}, $query->{criterias});  
697    #return $self->createSet($object);      if ($query->{options}->{OID}) {
698    #return $self->createSet($list);        $type = 'ITEM';
699    return $self->createSet(@$list);        $mode = 'OID';
700          $ident = $query->{options}->{OID};
701    #die("This should not be reached for now - redirect to \$self->getListFiltered() here!");      
702        } elsif (my $guid = $query->{options}->{GUID}) {
703          $type = 'TRANSPARENT';
704          $query->{criterias} = [ { key => 'guid', op => 'eq', val => $guid } ];    
705    
706        # if operator is different (dispatcher for 'getListFiltered')
707        } elsif (my $op = $query->{options}->{op}) {
708          $type = 'TRANSPARENT';
709          $query->{criterias} = [ { key => $query->{options}->{meta_label}, op => $op, val => $query->{options}->{meta_value} } ];    
710    
711        }
712      
713        # HACK: special case: querying by id does not translate into a common tangram query
714        # just load the object by given identifier (OID) named 'id' - this is required by Data::Transfer::Sync!
715        if ($query->{criterias} && ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq')) {
716          $type = 'ITEM';
717          $mode = 'SPECIAL.SYNC';
718          $ident = $query->{criterias}->[0]->{val};
719        }
720      
721    
722      # execute query
723      my $result;
724    
725      if ($type eq 'ITEM' && $ident) {
726    
727        if ($mode eq 'OID') {    
728          # TODO: review this case!
729          $result = $self->getObject($ident, $query->{options});
730        
731        } elsif ($mode eq 'SPECIAL.SYNC') {
732    
733          # V1 - failed
734          #return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );
735      
736          # hmm....
737          #return $self->createSet() if $ident == 5;
738          
739          # Unload single object before doing any further operations to
740          # expect a "fresh" object from orm when performing the next calls.
741          $self->{_COREHANDLE}->unload($ident);
742          
743          # Load object from orm.
744          my $object = $self->{_COREHANDLE}->load($ident);
745      
746          # determine object identifier (OID)
747          my $oid = $self->{_COREHANDLE}->id($object);
748          
749          # encapsulate into result/response container and return this one
750          $result = $self->createSet($object);
751          
752          # debugging
753          #$result = $self->createSet( $self->{COREHANDLE}->load('300090018') );
754    
755        }
756        
757      
758      } elsif ($type eq 'TRANSPARENT') {
759    
760        if ($crud eq 'RETRIEVE') {
761    
762          my $list = $self->getListFiltered($query->{node}, $query->{criterias}, $query->{sorting});
763          #return $list;
764          return $self->createResult($list);
765          
766          #return $self->createSet($object);
767          #return $self->createSet($list);
768          return $self->createSet(@$list);
769        
770          #die("This should not be reached for now - redirect to \$self->getListFiltered() here!");
771        
772          # try a generic tangram query here
773          # TODO: try to place an oql on top of that (search.cpan.org!)
774          my @crits;
775          foreach (@{$query->{criterias}}) {
776            my $op = '';
777            $op = '=' if lc $_->{op} eq 'eq';
778            push @crits, "$_->{key}$op'$_->{val}'";
779          }
780          my $subnodes = {};
781          map { $subnodes->{$_}++ } @{$query->{subnodes}};
782          # HACK: this is hardcoded ;(    expand possibilities!
783          #my $crit = join(' AND ', @crits);
784          #my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit);
785          #return $self->sendCommand($sql);
786          #my $h = $self->{COREHANDLE}->remote($query->{node});
787          #my $res = $self->{COREHANDLE}->select($h, $h->{);
788          $result = $self->createCursor($query->{node});
789    
790        } elsif ($crud eq 'UPDATE') {
791    
792          # Patch current query to be a loader (e.g. change action, remove payload) ...
793          my $childquery = deep_copy($query);
794          $childquery->{options}->{crud} = 'RETRIEVE';
795          delete $childquery->{payload};
796    
797          # ... to use it to fetch a fresh object using ourselves (sendQuery).
798          my $cursor = $self->sendQuery($childquery);
799          my $status = $cursor->getStatus();
800          my $object = $cursor->getNextEntry();
801    
802          # Merge values and apply value modifiers.
803          my $options = { utf8 => 1, php => 1 };
804          merge_to($object, $query->{payload}, $options);
805    
806          # Execute update operation at orm.
807          $self->update($object);
808        
809        } elsif ($crud eq 'DELETE') {
810    
811          # Patch current query to be a loader (e.g. change action) ...
812          my $childquery = deep_copy($query);
813          $childquery->{options}->{crud} = 'RETRIEVE';
814    
815          # ... to use it to fetch a fresh object using ourselves (sendQuery).
816          my $cursor = $self->sendQuery($childquery);
817          my $status = $cursor->getStatus();
818          my $object = $cursor->getNextEntry();
819    
820          $self->erase($object);
821    
822        } elsif ($crud eq 'CREATE') {
823          
824          my $nodename = $query->{node};      
825          my $newnode = $self->createNode($nodename);
826          my $id = $self->{_COREHANDLE}->insert($newnode);
827      
828          print "Saved new node $nodename with GUID $newnode->{guid}, OID '$id': " . Dumper($newnode) . "\n";
829          
830          return $newnode;
831    
832        }
833    
834      }
835    
836      return $result;
837    
   # try a generic tangram query here  
   # TODO: try to place an oql on top of that (search.cpan.org!)  
   my @crits;  
   foreach (@{$query->{criterias}}) {  
     my $op = '';  
     $op = '=' if lc $_->{op} eq 'eq';  
     push @crits, "$_->{key}$op'$_->{val}'";  
   }  
   my $subnodes = {};  
   map { $subnodes->{$_}++ } @{$query->{subnodes}};  
   # HACK: this is hardcoded ;(    expand possibilities!  
   #my $crit = join(' AND ', @crits);  
   #my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit);  
   #return $self->sendCommand($sql);  
   #my $h = $self->{COREHANDLE}->remote($query->{node});  
   #my $res = $self->{COREHANDLE}->select($h, $h->{);  
   return $self->createCursor($query->{node});  
838  }  }
839    
840  sub eraseAll {  sub eraseAll {
# Line 596  sub getObject { Line 870  sub getObject {
870    return $object if $object;    return $object if $object;
871  }  }
872    
873  sub getObjectByGuid {  sub getObjectByGuid_old {
874    my $self = shift;    my $self = shift;
875    my $guid = shift;    my $guid = shift;
876    my $options = shift;    my $options = shift;
# Line 626  sub getObjectByGuid { Line 900  sub getObjectByGuid {
900        
901  }  }
902    
903  sub getObjectAsHash {  sub getObjectAsHash_old {
904    my $self = shift;    my $self = shift;
905    my $oid = shift;    my $oid = shift;
906    my $options = shift;      my $options = shift;  
# Line 641  sub getObjectAsHash { Line 915  sub getObjectAsHash {
915    # build options (a callback to unload autovivified objects) for 'expand'    # build options (a callback to unload autovivified objects) for 'expand'
916    # TODO: use $logger to write to debug here!    # TODO: use $logger to write to debug here!
917    my $cb; # = sub {};    my $cb; # = sub {};
918    
919      # deactivated way to get rid of used instances, if requested
920  =pod  =pod
921    if ($options->{destroy}) {      if ($options->{destroy}) {
922      $options->{cb}->{destroy} = sub {        $options->{cb}->{destroy} = sub {
923        print "================ DESTROY", "\n";          print "================ DESTROY", "\n";
924        my $object = shift;          my $object = shift;
925        #print Dumper($object);          #print Dumper($object);
926        $self->{_COREHANDLE}->unload($object);          $self->{_COREHANDLE}->unload($object);
927        #undef($object);          #undef($object);
928      };        };
929    }      }
930  =cut  =cut
931    
932    my $hash = expand($obj, $options);    my $hash = expand($obj, $options);
933    #$options->{cb}->{destroy}->($obj);  
934    #$self->{_COREHANDLE}->unload($obj);    # old (unsuccessful) attempts to get rid of used instances, if requested
935      
936    # convert values in hash to utf8 to be ready for (e.g.) encapsulation in XML      # V1:
937    # now done in expand      #$options->{cb}->{destroy}->($obj);
938    #var2utf8($hash) if ($options->{utf8});      #$self->{_COREHANDLE}->unload($obj);
939        
940    # old (wrong) attempts to get rid of used instances, if requested      # V2:
941      #$obj->clear_refs;      #$obj->clear_refs;
942      #$self->{COREHANDLE}->unload($obj) if($options->{destroy});      #$self->{COREHANDLE}->unload($obj) if($options->{destroy});
943      #$obj->DESTROY;      #$obj->DESTROY;
# Line 707  sub disconnect2 { Line 983  sub disconnect2 {
983    $self->{dataStorageLayer}->disconnect();    $self->{dataStorageLayer}->disconnect();
984  }  }
985    
986    
987    sub createNode {
988      my $self = shift;
989      my $classname = shift;
990    
991      my $obj = $classname->new();
992      
993      my $attr_options = Class::Tangram::attribute_options($classname);
994      #print "Attribute Options: " . Dumper($attr_options);
995    
996      my $attr_types = Class::Tangram::attribute_types($classname);
997      #print "Attribute Types: " . Dumper($attr_types);
998      
999      foreach(keys %{$attr_types}) {
1000        if($attr_types->{$_} eq 'string') {
1001          $obj->{$_} = '';
1002        } elsif($attr_types->{$_} eq 'int') {
1003          $obj->{$_} = 0;
1004        } elsif($attr_types->{$_} eq 'real') {
1005          $obj->{$_} = 0;
1006        } elsif($attr_types->{$_} eq 'rawdatetime') {
1007          $obj->{$_} = '0000-00-00 00:00:00';
1008        } elsif($attr_types->{$_} eq 'ref') {
1009          if($attr_options->{$_}->{class}) {
1010            $obj->{$_} = $self->createNode($attr_options->{$_}->{class});
1011          } else {
1012            #$obj->{$_} = undef();
1013          }
1014        } elsif($attr_types->{$_} eq 'iarray') {
1015            $obj->{$_} = [ ];
1016        } elsif($attr_types->{$_} eq 'hash') {
1017            $obj->{$_} = {  };
1018        } elsif($attr_types->{$_} eq 'flat_hash') {
1019            $obj->{$_} = { };
1020        }
1021      }
1022      
1023      #print "New Object: " . Dumper($obj);
1024      
1025      return $obj;
1026    }
1027    
1028    
1029      sub insertChildNode {
1030        my $self = shift;
1031        my $child_entry = shift;
1032        my $query_args = shift;
1033        
1034        my $core = $self->{_COREHANDLE};
1035        my $nodename = $query_args->{nodename};
1036        
1037        # get parent object
1038        my $query = {
1039              node => $query_args->{parent}->{nodename},
1040              options => { GUID => $query_args->{parent}->{guid}, },
1041              };
1042        my $cursor = $self->sendQuery($query);
1043        my $parent = $cursor->getNextEntry();
1044    
1045        # debug
1046        #print "Parent_org: " . Dumper($parent);
1047            
1048        # Create child node object if isn't already done
1049        # ($child_entry have to be the class name then...)
1050        if(!ref($child_entry)) {
1051          $child_entry = $self->createNode($child_entry);
1052          # it could be insert 'manually' or will be insert 'transparent' if parent will be updated
1053          #$core->insert($child_entry);
1054          #print "Create child object [$nodename]: " . Dumper($child_entry);
1055        }
1056    
1057        # get reference of tied node (seems, only on Linux node's are tied!!)
1058        my $tied_node = tied $parent->{$nodename};
1059    
1060        # insert/change child entry at parent
1061        #print "reference: " . ref($parent->{$nodename}) . "\n";
1062        if(ref($parent->{$nodename}) eq 'ARRAY') {
1063          # (seems, only on Linux node's are tied!!)
1064          if($tied_node) {
1065            # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type,
1066            # so a 'PUSH' is not implemented (which could be then done transparently)
1067            my $array = $tied_node->FETCH;
1068            push @$array, $child_entry;
1069            $tied_node->STORE($array);
1070            # node will be normaly untied at 'STORE'
1071            if(tied $parent->{$nodename}) { print "already tied !!\n"; }
1072            else { undef $tied_node; }
1073          } else {
1074            push @{$parent->{$nodename}}, $child_entry;
1075          }
1076        }
1077        elsif(ref($parent->{$nodename}) eq 'HASH') {
1078          if(my $key = $query_args->{hash_key}) {
1079            # (seems, only on Linux node's are tied!!)
1080            if($tied_node) {
1081              # same problem as with 'ARRAY':
1082              # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type.
1083              my $hash = $tied_node->FETCH;
1084              $hash->{$key} = $child_entry;
1085              $tied_node->STORE($hash);
1086              # node will be normaly untied at 'STORE'
1087              if(tied $parent->{$nodename}) { print "already tied !!\n"; }
1088              else { undef $tied_node; }
1089            } else {
1090              $parent->{$nodename}->{$key} = $child_entry;
1091            }
1092          } else {
1093           print "ERROR: No HASH KEY given, so not able to insert hash entry!";
1094          }
1095        }
1096        else {
1097          $parent->{$nodename} = $child_entry;
1098        }
1099    
1100        # debug
1101        #print "Parent_new: " . Dumper($parent);
1102        
1103        # save parent
1104        $core->update($parent);
1105        
1106        # debug
1107        #print "Saved Parent: ". Dumper($parent);
1108        
1109        return $child_entry;
1110      }
1111    
1112    
1113  1;  1;
1114  __END__  __END__
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