/[cvs]/nfo/perl/libs/Data/Storage/Handler/Tangram.pm
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revision 1.33 by joko, Wed Apr 9 06:07:43 2003 UTC revision 1.36 by jonen, Sat May 10 17:31:18 2003 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.36  2003/05/10 17:31:18  jonen
7    #  + added new functions related to 'create' item
8    #   - createNode()
9    #     # creates non-persistent 'deep dummy filled' object
10    #   -
11    #
12    #  Revision 1.35  2003/04/19 16:09:48  jonen
13    #  + added operator dispatching (currently for getting ref-type) at 'getListFiltered'
14    #
15    #  Revision 1.34  2003/04/11 01:18:53  joko
16    #  sendQuery:
17    #  + introduced crud action 'DELETE'
18    #
19  #  Revision 1.33  2003/04/09 06:07:43  joko  #  Revision 1.33  2003/04/09 06:07:43  joko
20  #  revamped 'sub sendQuery'  #  revamped 'sub sendQuery'
21  #  #
# Line 502  sub getListFiltered { Line 515  sub getListFiltered {
515    #    objects => $objects,    #    objects => $objects,
516    #  );    #  );
517        
518      # HACK: build eval-string (sorry) to get filtered list - please give advice here      # TODO: is_op?
519      push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";      # dispatch un-common operators if exists
520        if($filter->{op} eq "ref") {
521          push @tfilters, 'ref($remote->{' . $filter->{key} . '})' . " eq '$filter->{val}'";
522        } else {
523          # HACK: build eval-string (sorry) to get filtered list - please give advice here
524          push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
525        }
526    
527    }    }
528    
# Line 564  sub sendQuery { Line 583  sub sendQuery {
583    # mode = OID|SPECIAL    # mode = OID|SPECIAL
584    my $mode = '';    my $mode = '';
585    my $ident = '';    my $ident = '';
586    my $action = '';    my $crud = '';
587        
588        
589    # dispatch type and mode    # dispatch type and mode
590        
591      # defaults - 1      # defaults - 1
592      if ($query->{options}) {      if ($query->{options}) {
593        $action = $query->{options}->{action};        $crud = $query->{options}->{crud};
594          $crud ||= $query->{options}->{action};
595      }      }
596    
597      # defaults - 2      # defaults - 2
598      $type ||= 'TRANSPARENT';      $type ||= 'TRANSPARENT';
599      $action ||= 'load';      $crud ||= 'RETRIEVE';
600    
601      if ($query->{options}->{OID}) {      if ($query->{options}->{OID}) {
602        $type = 'ITEM';        $type = 'ITEM';
# Line 585  sub sendQuery { Line 605  sub sendQuery {
605            
606      } elsif (my $guid = $query->{options}->{GUID}) {      } elsif (my $guid = $query->{options}->{GUID}) {
607        $type = 'TRANSPARENT';        $type = 'TRANSPARENT';
608        $query->{criterias} = [ { key => 'guid', op => 'eq', val => $guid } ];        $query->{criterias} = [ { key => 'guid', op => 'eq', val => $guid } ];    
609        
610        # if operator is different (dispatcher for 'getListFiltered')
611        } elsif (my $op = $query->{options}->{op}) {
612          $type = 'TRANSPARENT';
613          $query->{criterias} = [ { key => $query->{options}->{meta_label}, op => $op, val => $query->{options}->{meta_value} } ];    
614    
615      }      }
616        
617      # HACK: special case: querying by id does not translate into a common tangram query      # HACK: special case: querying by id does not translate into a common tangram query
# Line 604  sub sendQuery { Line 629  sub sendQuery {
629    if ($type eq 'ITEM' && $ident) {    if ($type eq 'ITEM' && $ident) {
630    
631      if ($mode eq 'OID') {          if ($mode eq 'OID') {    
632          # TODO: review this case!
633        $result = $self->getObject($ident, $query->{options});        $result = $self->getObject($ident, $query->{options});
634            
635      } elsif ($mode eq 'SPECIAL.SYNC') {      } elsif ($mode eq 'SPECIAL.SYNC') {
# Line 635  sub sendQuery { Line 661  sub sendQuery {
661        
662    } elsif ($type eq 'TRANSPARENT') {    } elsif ($type eq 'TRANSPARENT') {
663    
664      if ($action eq 'load') {      if ($crud eq 'RETRIEVE') {
665    
666        my $list = $self->getListFiltered($query->{node}, $query->{criterias});        my $list = $self->getListFiltered($query->{node}, $query->{criterias});
667        #return $self->createSet($object);        #return $self->createSet($object);
# Line 662  sub sendQuery { Line 688  sub sendQuery {
688        #my $res = $self->{COREHANDLE}->select($h, $h->{);        #my $res = $self->{COREHANDLE}->select($h, $h->{);
689        $result = $self->createCursor($query->{node});        $result = $self->createCursor($query->{node});
690    
691      } elsif ($action eq 'save') {      } elsif ($crud eq 'UPDATE') {
692    
693        # Patch current query to be a loader (e.g. change action, remove payload) ...        # Patch current query to be a loader (e.g. change action, remove payload) ...
694        my $childquery = deep_copy($query);        my $childquery = deep_copy($query);
695        $childquery->{options}->{action} = 'load';        $childquery->{options}->{crud} = 'RETRIEVE';
696        delete $childquery->{payload};        delete $childquery->{payload};
697    
698        # ... to use it to fetch fresh object using ourselves (sendQuery).        # ... to use it to fetch a fresh object using ourselves (sendQuery).
699        my $cursor = $self->sendQuery($childquery);        my $cursor = $self->sendQuery($childquery);
700        my $status = $cursor->getStatus();        my $status = $cursor->getStatus();
701        my $object = $cursor->getNextEntry();        my $object = $cursor->getNextEntry();
# Line 681  sub sendQuery { Line 707  sub sendQuery {
707        # Execute update operation at orm.        # Execute update operation at orm.
708        $self->update($object);        $self->update($object);
709            
710        } elsif ($crud eq 'DELETE') {
711    
712          # Patch current query to be a loader (e.g. change action) ...
713          my $childquery = deep_copy($query);
714          $childquery->{options}->{crud} = 'RETRIEVE';
715    
716          # ... to use it to fetch a fresh object using ourselves (sendQuery).
717          my $cursor = $self->sendQuery($childquery);
718          my $status = $cursor->getStatus();
719          my $object = $cursor->getNextEntry();
720    
721          $self->erase($object);
722    
723        } elsif ($crud eq 'CREATE') {
724          
725          my $nodename = $query->{node};      
726          my $newnode = $self->createNode($nodename);
727          my $id = $self->{_COREHANDLE}->insert($newnode);
728      
729          print "Saved new node $nodename with GUID $newnode->{guid}, OID '$id': " . Dumper($newnode) . "\n";
730          
731          return $newnode;
732    
733      }      }
734    
735    }    }
# Line 835  sub disconnect2 { Line 884  sub disconnect2 {
884    $self->{dataStorageLayer}->disconnect();    $self->{dataStorageLayer}->disconnect();
885  }  }
886    
887    
888    sub createNode {
889      my $self = shift;
890      my $classname = shift;
891    
892      my $obj = $classname->new();
893      
894      my $attr_options = Class::Tangram::attribute_options($classname);
895      #print "Attribute Options: " . Dumper($attr_options);
896    
897      my $attr_types = Class::Tangram::attribute_types($classname);
898      #print "Attribute Types: " . Dumper($attr_types);
899      
900      foreach(keys %{$attr_types}) {
901        if($attr_types->{$_} eq 'string') {
902          $obj->{$_} = '';
903        } elsif($attr_types->{$_} eq 'int') {
904          $obj->{$_} = 0;
905        } elsif($attr_types->{$_} eq 'real') {
906          $obj->{$_} = 0;
907        } elsif($attr_types->{$_} eq 'rawdatetime') {
908          $obj->{$_} = '0000-00-00 00:00:00';
909        } elsif($attr_types->{$_} eq 'ref') {
910          if($attr_options->{$_}->{class}) {
911            $obj->{$_} = $self->createNode($attr_options->{$_}->{class});
912          } else {
913            #$obj->{$_} = undef();
914          }
915        } elsif($attr_types->{$_} eq 'iarray') {
916            $obj->{$_} = [ ];
917        } elsif($attr_types->{$_} eq 'hash') {
918            $obj->{$_} = {  };
919        } elsif($attr_types->{$_} eq 'flat_hash') {
920            $obj->{$_} = { };
921        }
922      }
923      
924      #print "New Object: " . Dumper($obj);
925      
926      return $obj;
927    }
928    
929    
930      sub insertChildNode {
931        my $self = shift;
932        my $child_entry = shift;
933        my $query_args = shift;
934        
935        my $core = $self->{_COREHANDLE};
936        my $nodename = $query_args->{nodename};
937        
938        # get parent object
939        my $query = {
940              node => $query_args->{parent}->{nodename},
941              options => { GUID => $query_args->{parent}->{guid}, },
942              };
943        my $cursor = $self->sendQuery($query);
944        my $parent = $cursor->getNextEntry();
945    
946        # debug
947        #print "Parent_org: " . Dumper($parent);
948            
949        # Create child node object if isn't already done
950        # ($child_entry have to be the class name then...)
951        if(!ref($child_entry)) {
952          $child_entry = $self->createNode($child_entry);
953          # it could be insert 'manually' or will be insert 'transparent' if parent will be updated
954          #$core->insert($child_entry);
955          #print "Create child object [$nodename]: " . Dumper($child_entry);
956        }
957    
958        # get reference of tied node
959        my $tied_node = tied $parent->{$nodename};
960    
961        # insert/change child entry at parent
962        #print "reference: " . ref($parent->{$nodename}) . "\n";
963        if(ref($parent->{$nodename}) eq 'ARRAY') {
964          # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type,
965          # so a 'PUSH' is not implemented (which could be then done transparently)
966          my $array = $tied_node->FETCH;
967          push @$array, $child_entry;
968          $tied_node->STORE($array);
969          # node will be normaly untied at 'STORE'
970          if(tied $parent->{$nodename}) { print "already tied !!\n"; }
971          else { undef $tied_node; }
972        }
973        elsif(ref($parent->{$nodename}) eq 'HASH') {
974          if(my $key = $query_args->{hash_key}) {
975            # same problem as with 'ARRAY':
976            # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type.
977            my $hash = $tied_node->FETCH;
978            $hash->{$key} = $child_entry;
979            $tied_node->STORE($hash);
980            # node will be normaly untied at 'STORE'
981            if(tied $parent->{$nodename}) { print "already tied !!\n"; }
982            else { undef $tied_node; }
983          } else {
984           print "ERROR: No HASH KEY given, so not able to insert hash entry!";
985          }
986        }
987        else {
988          $parent->{$nodename} = $child_entry;
989        }
990    
991        # debug
992        #print "Parent_new: " . Dumper($parent);
993        
994        # save parent
995        $core->update($parent);
996        
997        # debug
998        #print "Saved Parent: ". Dumper($parent);
999        
1000        return $child_entry;
1001      }
1002    
1003    
1004  1;  1;
1005  __END__  __END__
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