/[cvs]/nfo/perl/libs/Data/Storage/Handler/Tangram.pm
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revision 1.34 by joko, Fri Apr 11 01:18:53 2003 UTC revision 1.37 by jonen, Sat May 10 17:37:39 2003 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.37  2003/05/10 17:37:39  jonen
7    #  corrected last commit
8    #
9    #  Revision 1.36  2003/05/10 17:31:18  jonen
10    #  + added new functions related to 'create' item
11    #   - createNode()
12    #     # creates non-persistent 'deep dummy filled' object
13    #   - insertChildNode()
14    #     # inserts child node at given parent (child node haven't to exists,
15    #         createNode will be injected transparently)
16    #
17    #  Revision 1.35  2003/04/19 16:09:48  jonen
18    #  + added operator dispatching (currently for getting ref-type) at 'getListFiltered'
19    #
20  #  Revision 1.34  2003/04/11 01:18:53  joko  #  Revision 1.34  2003/04/11 01:18:53  joko
21  #  sendQuery:  #  sendQuery:
22  #  + introduced crud action 'DELETE'  #  + introduced crud action 'DELETE'
# Line 506  sub getListFiltered { Line 520  sub getListFiltered {
520    #    objects => $objects,    #    objects => $objects,
521    #  );    #  );
522        
523      # HACK: build eval-string (sorry) to get filtered list - please give advice here      # TODO: is_op?
524      push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";      # dispatch un-common operators if exists
525        if($filter->{op} eq "ref") {
526          push @tfilters, 'ref($remote->{' . $filter->{key} . '})' . " eq '$filter->{val}'";
527        } else {
528          # HACK: build eval-string (sorry) to get filtered list - please give advice here
529          push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
530        }
531    
532    }    }
533    
# Line 590  sub sendQuery { Line 610  sub sendQuery {
610            
611      } elsif (my $guid = $query->{options}->{GUID}) {      } elsif (my $guid = $query->{options}->{GUID}) {
612        $type = 'TRANSPARENT';        $type = 'TRANSPARENT';
613        $query->{criterias} = [ { key => 'guid', op => 'eq', val => $guid } ];        $query->{criterias} = [ { key => 'guid', op => 'eq', val => $guid } ];    
614        
615        # if operator is different (dispatcher for 'getListFiltered')
616        } elsif (my $op = $query->{options}->{op}) {
617          $type = 'TRANSPARENT';
618          $query->{criterias} = [ { key => $query->{options}->{meta_label}, op => $op, val => $query->{options}->{meta_value} } ];    
619    
620      }      }
621        
622      # HACK: special case: querying by id does not translate into a common tangram query      # HACK: special case: querying by id does not translate into a common tangram query
# Line 700  sub sendQuery { Line 725  sub sendQuery {
725    
726        $self->erase($object);        $self->erase($object);
727    
728        } elsif ($crud eq 'CREATE') {
729          
730          my $nodename = $query->{node};      
731          my $newnode = $self->createNode($nodename);
732          my $id = $self->{_COREHANDLE}->insert($newnode);
733      
734          print "Saved new node $nodename with GUID $newnode->{guid}, OID '$id': " . Dumper($newnode) . "\n";
735          
736          return $newnode;
737    
738      }      }
739    
740    }    }
# Line 854  sub disconnect2 { Line 889  sub disconnect2 {
889    $self->{dataStorageLayer}->disconnect();    $self->{dataStorageLayer}->disconnect();
890  }  }
891    
892    
893    sub createNode {
894      my $self = shift;
895      my $classname = shift;
896    
897      my $obj = $classname->new();
898      
899      my $attr_options = Class::Tangram::attribute_options($classname);
900      #print "Attribute Options: " . Dumper($attr_options);
901    
902      my $attr_types = Class::Tangram::attribute_types($classname);
903      #print "Attribute Types: " . Dumper($attr_types);
904      
905      foreach(keys %{$attr_types}) {
906        if($attr_types->{$_} eq 'string') {
907          $obj->{$_} = '';
908        } elsif($attr_types->{$_} eq 'int') {
909          $obj->{$_} = 0;
910        } elsif($attr_types->{$_} eq 'real') {
911          $obj->{$_} = 0;
912        } elsif($attr_types->{$_} eq 'rawdatetime') {
913          $obj->{$_} = '0000-00-00 00:00:00';
914        } elsif($attr_types->{$_} eq 'ref') {
915          if($attr_options->{$_}->{class}) {
916            $obj->{$_} = $self->createNode($attr_options->{$_}->{class});
917          } else {
918            #$obj->{$_} = undef();
919          }
920        } elsif($attr_types->{$_} eq 'iarray') {
921            $obj->{$_} = [ ];
922        } elsif($attr_types->{$_} eq 'hash') {
923            $obj->{$_} = {  };
924        } elsif($attr_types->{$_} eq 'flat_hash') {
925            $obj->{$_} = { };
926        }
927      }
928      
929      #print "New Object: " . Dumper($obj);
930      
931      return $obj;
932    }
933    
934    
935      sub insertChildNode {
936        my $self = shift;
937        my $child_entry = shift;
938        my $query_args = shift;
939        
940        my $core = $self->{_COREHANDLE};
941        my $nodename = $query_args->{nodename};
942        
943        # get parent object
944        my $query = {
945              node => $query_args->{parent}->{nodename},
946              options => { GUID => $query_args->{parent}->{guid}, },
947              };
948        my $cursor = $self->sendQuery($query);
949        my $parent = $cursor->getNextEntry();
950    
951        # debug
952        #print "Parent_org: " . Dumper($parent);
953            
954        # Create child node object if isn't already done
955        # ($child_entry have to be the class name then...)
956        if(!ref($child_entry)) {
957          $child_entry = $self->createNode($child_entry);
958          # it could be insert 'manually' or will be insert 'transparent' if parent will be updated
959          #$core->insert($child_entry);
960          #print "Create child object [$nodename]: " . Dumper($child_entry);
961        }
962    
963        # get reference of tied node
964        my $tied_node = tied $parent->{$nodename};
965    
966        # insert/change child entry at parent
967        #print "reference: " . ref($parent->{$nodename}) . "\n";
968        if(ref($parent->{$nodename}) eq 'ARRAY') {
969          # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type,
970          # so a 'PUSH' is not implemented (which could be then done transparently)
971          my $array = $tied_node->FETCH;
972          push @$array, $child_entry;
973          $tied_node->STORE($array);
974          # node will be normaly untied at 'STORE'
975          if(tied $parent->{$nodename}) { print "already tied !!\n"; }
976          else { undef $tied_node; }
977        }
978        elsif(ref($parent->{$nodename}) eq 'HASH') {
979          if(my $key = $query_args->{hash_key}) {
980            # same problem as with 'ARRAY':
981            # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type.
982            my $hash = $tied_node->FETCH;
983            $hash->{$key} = $child_entry;
984            $tied_node->STORE($hash);
985            # node will be normaly untied at 'STORE'
986            if(tied $parent->{$nodename}) { print "already tied !!\n"; }
987            else { undef $tied_node; }
988          } else {
989           print "ERROR: No HASH KEY given, so not able to insert hash entry!";
990          }
991        }
992        else {
993          $parent->{$nodename} = $child_entry;
994        }
995    
996        # debug
997        #print "Parent_new: " . Dumper($parent);
998        
999        # save parent
1000        $core->update($parent);
1001        
1002        # debug
1003        #print "Saved Parent: ". Dumper($parent);
1004        
1005        return $child_entry;
1006      }
1007    
1008    
1009  1;  1;
1010  __END__  __END__
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