/[cvs]/nfo/perl/libs/Data/Storage/Handler/Tangram.pm
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revision 1.32 by joko, Tue Apr 8 22:52:22 2003 UTC revision 1.49 by jonen, Wed Nov 3 14:12:34 2004 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.49  2004/11/03 14:12:34  jonen
7    #  replaced print with logger->info
8    #
9    #  Revision 1.48  2004/10/28 11:35:51  jonen
10    #  + bugfix related to select-criterias(filter)
11    #
12    #  Revision 1.47  2004/08/31 14:26:08  jonen
13    #  updated
14    #
15    #  Revision 1.46  2004/05/06 12:54:34  jonen
16    #  + bugfix related to multiple select-'filter'
17    #
18    #  Revision 1.45  2003/12/14 01:48:36  jonen
19    #  small HACK at _insertChildNode: some special Childnodes should not be created because existing objects have to be selected!
20    #  TODO: make this more generic, e.g. implement a special flag at Schema
21    #
22    #  Revision 1.44  2003/12/04 01:01:50  joko
23    #  + sendQuery now returns result even on crud=UPDATE
24    #
25    #  Revision 1.43  2003/07/02 11:07:12  jonen
26    #  re-activate filtering of results *after* results are fetched from tangram
27    #    (needed for e.g. UserManagment)
28    #
29    #  Revision 1.42  2003/07/01 23:24:17  joko
30    #  now using package before using function
31    #
32    #  Revision 1.41  2003/06/29 02:03:45  joko
33    #  fix:? initialize schema on startup
34    #
35    #  Revision 1.40  2003/06/25 22:57:54  joko
36    #  major rework of "sub sendQuery / sub getListFiltered": now should be capable of "sorting"
37    #
38    #  Revision 1.39  2003/06/06 11:40:40  jonen
39    #  fixed bug at 'getFilteredList'
40    #
41    #  Revision 1.38  2003/05/13 16:38:38  joko
42    #  problems with "tied" on 5.6.1/win32
43    #
44    #  Revision 1.37  2003/05/10 17:37:39  jonen
45    #  corrected last commit
46    #
47    #  Revision 1.36  2003/05/10 17:31:18  jonen
48    #  + added new functions related to 'create' item
49    #   - createNode()
50    #     # creates non-persistent 'deep dummy filled' object
51    #   - insertChildNode()
52    #     # inserts child node at given parent (child node haven't to exists,
53    #         createNode will be injected transparently)
54    #
55    #  Revision 1.35  2003/04/19 16:09:48  jonen
56    #  + added operator dispatching (currently for getting ref-type) at 'getListFiltered'
57    #
58    #  Revision 1.34  2003/04/11 01:18:53  joko
59    #  sendQuery:
60    #  + introduced crud action 'DELETE'
61    #
62    #  Revision 1.33  2003/04/09 06:07:43  joko
63    #  revamped 'sub sendQuery'
64    #
65  #  Revision 1.32  2003/04/08 22:52:22  joko  #  Revision 1.32  2003/04/08 22:52:22  joko
66  #  modified 'querySchema': better behaviour regarding filtering result  #  modified 'querySchema': better behaviour regarding filtering result
67  #  #
# Line 133  use base ("Data::Storage::Handler::Abstr Line 192  use base ("Data::Storage::Handler::Abstr
192    
193  use Data::Dumper;  use Data::Dumper;
194  use Tangram;  use Tangram;
195    use Class::Tangram;
196    
197  use DesignPattern::Object;  use DesignPattern::Object;
198  use Data::Storage::Result::Tangram;  use Data::Storage::Result::Tangram;
199  use Data::Mungle::Compare::Struct qw( isEmpty );  use Data::Mungle::Compare::Struct qw( isEmpty );
200  use Data::Mungle::Transform::Deep qw( expand );  use Data::Mungle::Transform::Deep qw( expand deep_copy merge_to );
201    
202  # get logger instance  # get logger instance
203  my $logger = Log::Dispatch::Config->instance;  my $logger = Log::Dispatch::Config->instance;
204    
205    #$Tangram::TRACE = *STDOUT;
206    
207  # this holds the complete instantiated schema from tangram  # this holds the complete instantiated schema from tangram
208  my $schema_tangram;  my $schema_tangram;
# Line 160  sub _initSchema { Line 221  sub _initSchema {
221    #if (!$schema_tangram) {    #if (!$schema_tangram) {
222      #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} } );
223      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} } );
224      $schema_tangram = $obj->getSchema();      $schema_tangram = $obj->getSchema() if $obj;
225    #}    #}
226    if (!$schema_tangram) {    if (!$schema_tangram) {
227      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{locator}->{schema}." );
228      return 0;      return 0;
229    }    }
230    #$self->_patchSchema();    #$self->_patchSchema();
# Line 209  sub connect { Line 270  sub connect {
270  #      return;  #      return;
271  #    }  #    }
272    
273      #return unless $self->_initSchema();      return unless $self->_initSchema();
274      $self->_initSchema();      #$self->_initSchema();
275    
276      # create the main tangram storage object      # create the main tangram storage object
277      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
# Line 472  sub getListFiltered { Line 533  sub getListFiltered {
533    # redirect to unfiltered mode    # redirect to unfiltered mode
534    #return $self->getListUnfiltered(@_);    #return $self->getListUnfiltered(@_);
535    
536    my $nodename = shift;    my $in = {};
537    my $filters = shift;    $in->{nodename} = shift;
538      $in->{filters} = shift;
539      $in->{sorting} = shift;
540      
541    my @results;    my @results;
542    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $in->{nodename} . "' )" );
543    
544  #print Dumper($filters);    #print "Filter_payload: " . Dumper($in->{filters}) . "\n";
545    
546      # 1. "Remote Object Handle" - get set of objects from odbms by object name
547      my $remote = $self->{_COREHANDLE}->remote($in->{nodename});
548      
549      # 2. Transfer $in to $orm_query
550      my $orm_query = {};
551        
552      # 2.a. Filters
553    my @tfilters;    my @tfilters;
554      my $orm_filter = undef;
555        
556    foreach my $filter (@$filters) {    foreach my $filter (@{$in->{filters}}) {
557        
558      # get filter - TODO: for each filter      # get filter - TODO: for each filter
559      #my $filter = $filters->[0];      #my $filter = $filters->[0];
560      
561      # build filter      # 1. The parts of a filter source entry
562      my $lexpr = $filter->{key};      my $lexpr = $filter->{key};
563      #my $op = $filter->{op};      #my $op = $filter->{op};
564      my $op = '=';      my $op = '=';
565      my $rexpr = $filter->{val};      my $rexpr = $filter->{val};
566      my $tight = 100;      my $tight = 100;
567    
568        # 2. Build filter target entry
569            
570    #  my $tfilter = Tangram::Filter->new(      # Test 1 - didn't work out!
571    #    expr => "t1.$lexpr $op '$rexpr'",      #  my $tfilter = Tangram::Filter->new(
572    #    tight => $tight,      #    expr => "t1.$lexpr $op '$rexpr'",
573    #    objects => $objects,      #    tight => $tight,
574    #  );      #    objects => $objects,
575        #  );
576    
577        my $orm_filter_tmp = undef;
578        # was:
579        # TODO: is_op?
580        # dispatch un-common operators if exists
581        if ($filter->{op} eq "ref") {
582          # do nothing, results will be filtered later cause 'tangram-filter' doesn't support 'ref' query
583          #print "Filter->op eq 'ref'.\n";
584          #push @tfilters, 'ref($remote->{' . $filter->{key} . '})' . " eq '$filter->{val}'";
585        } else {
586          # HACK: build eval-string (sorry) to get filtered list - please give advice here
587          #push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
588          # better: calculate expression right here!
589          #push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
590          
591          #print "key: ", $filter->{key}, "\n";
592          
593          my $left = $remote->{$filter->{key}};
594          #my $r = Tangram::Expr->new( 'string' => "'" . $filter->{val} . "'" );
595          my $right = $filter->{val};
596          my $op = $filter->{op};
597          $orm_filter_tmp = $left->$op($right);
598        }
599    
600        if (!ref($orm_filter)) {
601          $orm_filter = $orm_filter_tmp;
602        } else {
603          $orm_filter = $orm_filter->and($orm_filter_tmp);
604        }
605    
606      }
607    
608      $orm_query->{filter} = $orm_filter;
609        
610      # HACK: build eval-string (sorry) to get filtered list - please give advice here    # debug point:
611      push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";    #print "Filter: " . Dumper($orm_query->{filter}) . "\n";
612    
613      # was:
614    
615      # 2.b. sorting [new as of 2003-06-17]
616      if ($in->{sorting}) {
617        my $sorting_rules = [];
618        my $sorting_order = 'ASC';
619        foreach my $sorting_column (keys %{$in->{sorting}}) {
620          $sorting_order = $in->{sorting}->{$sorting_column} if $in->{sorting}->{$sorting_column};
621          push @$sorting_rules, Tangram::Expr->new( 'string' => $sorting_column );
622        }
623        $orm_query->{order} = $sorting_rules;
624        if ($sorting_order eq 'DESC') {
625          $orm_query->{desc} = 1;
626        }
627    }    }
628    
   my $tfilter = join(' & ', @tfilters);  
629    
630    # get set of objects from odbms by object name    # 3. build and issue query - return result as Tangram::Cursor
   my $remote = $self->{_COREHANDLE}->remote($nodename);  
631        
632    # was:    # coerce hash into array (This is valid in Perl)
633    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);    my @orm_query_args = %$orm_query;
634      # send query (arguments) to orm
635      @results = $self->{_COREHANDLE}->select($remote, @orm_query_args);
636      
637      #my $cursor = $self->{_COREHANDLE}->cursor($remote, @orm_query_args);
638      #return $cursor;
639      #print Dumper(@results);
640    
641    # is:    # is:
642    # 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
643    my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';      #my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . $sorting . ');';
644          #print "eval: $evalstring", "\n";
645    #print "eval: $evalstring", "\n";      # get filtered list/set
646          #@results = eval($evalstring);
647    # get filtered list/set      #die $@ if $@;
648    @results = eval($evalstring);  
649    die $@ if $@;    # filter results - NEEDED for e.g. UserManagment !!
650      if ($in->{filters}->[0]->{op} && ($in->{filters}->[0]->{op} eq "ref")) {
651          #print "Filter->op eq 'ref'.\n";
652          my $att_name = $in->{filters}->[0]->{key};
653          my $att_val = $in->{filters}->[0]->{val};
654          my @filtered;
655          foreach(@results) {
656            if(ref($_->{$att_name}) eq $att_val) {
657              push @filtered, $_;
658            }
659          }
660          @results = @filtered;
661      }
662    
663      #print "results: " . Dumper(\@results);
664        
665    return \@results;    return \@results;
666  }  }
# Line 550  sub createSet { Line 690  sub createSet {
690    return $result;    return $result;
691  }  }
692    
693    sub createResult {
694      my $self = shift;
695      my $rh = shift;
696      my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
697      return $result;
698    }
699    
700  sub sendQuery {  sub sendQuery {
701    my $self = shift;    my $self = shift;
702    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($sql);  
703    
704    #print Dumper($query);    #print Dumper($query);
705    
706    # HACK: special case: querying by id does not translate into a common tangram query    # type = ITEM|LIST|TRANSPARENT
707    # just load the object by given id(ent)    my $type = '';
708    if ($query->{criterias} && ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq')) {    # mode = OID|SPECIAL
709      #print "LOAD!!!", "\n";    my $mode = '';
710      #exit;    my $ident = '';
711      #return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );    my $crud = '';
712      my $ident = $query->{criterias}->[0]->{val};    
713  #print "load obj", "\n";    
714      #return $self->createSet() if $ident == 5;    # dispatch type and mode
715      $self->{_COREHANDLE}->unload($ident);    
716      my $object = $self->{_COREHANDLE}->load($ident);      # defaults - 1
717  #print "get id", "\n";      if ($query->{options}) {
718      my $oid = $self->{_COREHANDLE}->id($object);        $crud = $query->{options}->{crud};
719  #print Dumper($object);        $crud ||= $query->{options}->{action};
720  #print "oid: $oid", "\n";      }
721      return $self->createSet($object);  
722      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );      # defaults - 2
723    }      $type ||= 'TRANSPARENT';
724        $crud ||= 'RETRIEVE';
725    my $list = $self->getListFiltered($query->{node}, $query->{criterias});  
726    #return $self->createSet($object);      if ($query->{options}->{OID}) {
727    #return $self->createSet($list);        $type = 'ITEM';
728    return $self->createSet(@$list);        $mode = 'OID';
729          $ident = $query->{options}->{OID};
730    #die("This should not be reached for now - redirect to \$self->getListFiltered() here!");      
731        } elsif (my $guid = $query->{options}->{GUID}) {
732          $type = 'TRANSPARENT';
733          if(ref($query->{criterias}) eq 'ARRAY') {
734            push @{$query->{criterias}}, { key => 'guid', op => 'eq', val => $guid };
735          } else {
736            $query->{criterias} = [ { key => 'guid', op => 'eq', val => $guid } ];
737          }
738        }
739        # if operator is different (dispatcher for 'getListFiltered')
740        if (my $op = $query->{options}->{op}) {
741          $type = 'TRANSPARENT';
742          if(ref($query->{criterias}) eq 'ARRAY') {
743            push @{$query->{criterias}}, { key => $query->{options}->{meta_label}, op => $op, val => $query->{options}->{meta_value} };
744          } else {
745            $query->{criterias} = [ { key => $query->{options}->{meta_label}, op => $op, val => $query->{options}->{meta_value} } ];    
746          }
747        }
748      
749        # HACK: special case: querying by id does not translate into a common tangram query
750        # just load the object by given identifier (OID) named 'id' - this is required by Data::Transfer::Sync!
751        if ($query->{criterias} && ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq')) {
752          $type = 'ITEM';
753          $mode = 'SPECIAL.SYNC';
754          $ident = $query->{criterias}->[0]->{val};
755        }
756      
757    
758      # execute query
759      my $result;
760    
761      if ($type eq 'ITEM' && $ident) {
762    
763        if ($mode eq 'OID') {    
764          # TODO: review this case!
765          $result = $self->getObject($ident, $query->{options});
766        
767        } elsif ($mode eq 'SPECIAL.SYNC') {
768    
769          # V1 - failed
770          #return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );
771      
772          # hmm....
773          #return $self->createSet() if $ident == 5;
774          
775          # Unload single object before doing any further operations to
776          # expect a "fresh" object from orm when performing the next calls.
777          $self->{_COREHANDLE}->unload($ident);
778          
779          # Load object from orm.
780          my $object = $self->{_COREHANDLE}->load($ident);
781      
782          # determine object identifier (OID)
783          my $oid = $self->{_COREHANDLE}->id($object);
784          
785          # encapsulate into result/response container and return this one
786          $result = $self->createSet($object);
787          
788          # debugging
789          #$result = $self->createSet( $self->{COREHANDLE}->load('300090018') );
790    
791        }
792        
793      
794      } elsif ($type eq 'TRANSPARENT') {
795    
796        if ($crud eq 'RETRIEVE') {
797    
798          my $list = $self->getListFiltered($query->{node}, $query->{criterias}, $query->{sorting});
799          #return $list;
800          return $self->createResult($list);
801          
802          #return $self->createSet($object);
803          #return $self->createSet($list);
804          return $self->createSet(@$list);
805        
806          #die("This should not be reached for now - redirect to \$self->getListFiltered() here!");
807        
808          # try a generic tangram query here
809          # TODO: try to place an oql on top of that (search.cpan.org!)
810          my @crits;
811          foreach (@{$query->{criterias}}) {
812            my $op = '';
813            $op = '=' if lc $_->{op} eq 'eq';
814            push @crits, "$_->{key}$op'$_->{val}'";
815          }
816          my $subnodes = {};
817          map { $subnodes->{$_}++ } @{$query->{subnodes}};
818          # HACK: this is hardcoded ;(    expand possibilities!
819          #my $crit = join(' AND ', @crits);
820          #my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit);
821          #return $self->sendCommand($sql);
822          #my $h = $self->{COREHANDLE}->remote($query->{node});
823          #my $res = $self->{COREHANDLE}->select($h, $h->{);
824          $result = $self->createCursor($query->{node});
825    
826        } elsif ($crud eq 'UPDATE') {
827    
828          # Patch current query to be a loader (e.g. change action, remove payload) ...
829          my $childquery = deep_copy($query);
830          $childquery->{options}->{crud} = 'RETRIEVE';
831          delete $childquery->{payload};
832    
833          # ... to use it to fetch a fresh object using ourselves (sendQuery).
834          my $cursor = $self->sendQuery($childquery);
835          my $status = $cursor->getStatus();
836          my $object = $cursor->getNextEntry();
837    
838          # Merge values and apply value modifiers.
839          my $options = { utf8 => 1, php => 1 };
840          merge_to($object, $query->{payload}, $options);
841    
842          #print Dumper($object);
843          
844          # Execute update operation at orm.
845          $self->update($object);
846          $result = $self->createResult([ $object ]);
847        
848        } elsif ($crud eq 'DELETE') {
849    
850          # Patch current query to be a loader (e.g. change action) ...
851          my $childquery = deep_copy($query);
852          $childquery->{options}->{crud} = 'RETRIEVE';
853    
854          # ... to use it to fetch a fresh object using ourselves (sendQuery).
855          my $cursor = $self->sendQuery($childquery);
856          my $status = $cursor->getStatus();
857          my $object = $cursor->getNextEntry();
858    
859          $self->erase($object);
860          $self->unload($object);
861    
862        } elsif ($crud eq 'CREATE') {
863          
864          my $nodename = $query->{node};      
865          my $newnode = $self->createNode($nodename);
866          my $id = $self->{_COREHANDLE}->insert($newnode);
867          
868          $logger->info( __PACKAGE__ . "->sendQuery: Saved new node $nodename with GUID $newnode->{guid}, OID '$id'.");
869          
870          return $newnode;
871    
872        }
873    
874      }
875    
876      return $result;
877    
   # try a generic tangram query here  
   # TODO: try to place an oql on top of that (search.cpan.org!)  
   my @crits;  
   foreach (@{$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});  
878  }  }
879    
880  sub eraseAll {  sub eraseAll {
# Line 639  sub getObject { Line 910  sub getObject {
910    return $object if $object;    return $object if $object;
911  }  }
912    
913  sub getObjectByGuid {  sub getObjectByGuid_old {
914    my $self = shift;    my $self = shift;
915    my $guid = shift;    my $guid = shift;
916    my $options = shift;    my $options = shift;
# Line 669  sub getObjectByGuid { Line 940  sub getObjectByGuid {
940        
941  }  }
942    
943  sub getObjectAsHash {  sub getObjectAsHash_old {
944    my $self = shift;    my $self = shift;
945    my $oid = shift;    my $oid = shift;
946    my $options = shift;      my $options = shift;  
# Line 752  sub disconnect2 { Line 1023  sub disconnect2 {
1023    $self->{dataStorageLayer}->disconnect();    $self->{dataStorageLayer}->disconnect();
1024  }  }
1025    
1026    
1027    sub createNode {
1028      my $self = shift;
1029      my $classname = shift;
1030    
1031      my $obj = $classname->new();
1032      
1033      my $attr_options = Class::Tangram::attribute_options($classname);
1034      #print "Attribute Options: " . Dumper($attr_options);
1035    
1036      my $attr_types = Class::Tangram::attribute_types($classname);
1037      #print "Attribute Types: " . Dumper($attr_types);
1038      
1039      foreach(keys %{$attr_types}) {
1040        if($attr_types->{$_} eq 'string') {
1041          $obj->{$_} = '';
1042        } elsif($attr_types->{$_} eq 'int') {
1043          $obj->{$_} = 0;
1044        } elsif($attr_types->{$_} eq 'real') {
1045          $obj->{$_} = 0;
1046        } elsif($attr_types->{$_} eq 'rawdatetime') {
1047          $obj->{$_} = '0000-00-00 00:00:00';
1048        } elsif($attr_types->{$_} eq 'ref') {
1049          if($attr_options->{$_}->{class}) {
1050            # HACK!!!
1051            # STANDALONE Objects (objects which make sense to instanciat alone) should not created automaticly
1052            # because they maybe exists and should only be SETTED not CREATED!
1053            # TODO: Create a flag at the scheme for that reason!
1054            #   (e.g child_node => 1 for child-nodes only like e.g. UserData)
1055            if($attr_options->{$_}->{class} eq 'NetPerson' || $attr_options->{$_}->{class} eq 'Event' || $attr_options->{$_}->{class} eq 'BetRule') {
1056              #$obj->{$_} = undef();
1057            } else {
1058              $obj->{$_} = $self->createNode($attr_options->{$_}->{class});
1059            }
1060          } else {
1061            #$obj->{$_} = undef();
1062          }
1063        } elsif($attr_types->{$_} eq 'iarray') {
1064            $obj->{$_} = [ ];
1065        } elsif($attr_types->{$_} eq 'hash') {
1066            $obj->{$_} = {  };
1067        } elsif($attr_types->{$_} eq 'flat_hash') {
1068            $obj->{$_} = { };
1069        }
1070      }
1071      
1072      #print "New Object: " . Dumper($obj);
1073      
1074      return $obj;
1075    }
1076    
1077    
1078      sub insertChildNode {
1079        my $self = shift;
1080        my $child_entry = shift;
1081        my $query_args = shift;
1082        
1083        my $core = $self->{_COREHANDLE};
1084        my $nodename = $query_args->{nodename};
1085        
1086        # get parent object
1087        my $query = {
1088              node => $query_args->{parent}->{nodename},
1089              options => { GUID => $query_args->{parent}->{guid}, },
1090              };
1091        my $cursor = $self->sendQuery($query);
1092        my $parent = $cursor->getNextEntry();
1093    
1094        # debug
1095        #print "Parent_org: " . Dumper($parent);
1096            
1097        # Create child node object if isn't already done
1098        # ($child_entry have to be the class name then...)
1099        if(!ref($child_entry)) {
1100          $child_entry = $self->createNode($child_entry);
1101          # it could be insert 'manually' or will be insert 'transparent' if parent will be updated
1102          #$core->insert($child_entry);
1103          #print "Create child object [$nodename]: " . Dumper($child_entry);
1104        }
1105    
1106        # get reference of tied node (seems, only on Linux node's are tied!!)
1107        my $tied_node = tied $parent->{$nodename};
1108    
1109        # insert/change child entry at parent
1110        #print "reference: " . ref($parent->{$nodename}) . "\n";
1111        if(ref($parent->{$nodename}) eq 'ARRAY') {
1112          # (seems, only on Linux node's are tied!!)
1113          if($tied_node) {
1114            # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type,
1115            # so a 'PUSH' is not implemented (which could be then done transparently)
1116            my $array = $tied_node->FETCH;
1117            push @$array, $child_entry;
1118            $tied_node->STORE($array);
1119            # node will be normaly untied at 'STORE'
1120            if(tied $parent->{$nodename}) { print "already tied !!\n"; }
1121            else { undef $tied_node; }
1122          } else {
1123            push @{$parent->{$nodename}}, $child_entry;
1124          }
1125        }
1126        elsif(ref($parent->{$nodename}) eq 'HASH') {
1127          if(my $key = $query_args->{hash_key}) {
1128            # (seems, only on Linux node's are tied!!)
1129            if($tied_node) {
1130              # same problem as with 'ARRAY':
1131              # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type.
1132              my $hash = $tied_node->FETCH;
1133              $hash->{$key} = $child_entry;
1134              $tied_node->STORE($hash);
1135              # node will be normaly untied at 'STORE'
1136              if(tied $parent->{$nodename}) { print "already tied !!\n"; }
1137              else { undef $tied_node; }
1138            } else {
1139              $parent->{$nodename}->{$key} = $child_entry;
1140            }
1141          } else {
1142           print "ERROR: No HASH KEY given, so not able to insert hash entry!";
1143          }
1144        }
1145        else {
1146          $parent->{$nodename} = $child_entry;
1147        }
1148    
1149        # debug
1150        #print "Parent_new: " . Dumper($parent);
1151        
1152        # save parent
1153        $core->update($parent);
1154        
1155        # debug
1156        #print "Saved Parent: ". Dumper($parent);
1157        
1158        return $child_entry;
1159      }
1160    
1161    
1162  1;  1;
1163  __END__  __END__
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