/[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 1.39 by jonen, Fri Jun 6 11:40:40 2003 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.39  2003/06/06 11:40:40  jonen
7    #  fixed bug at 'getFilteredList'
8    #
9    #  Revision 1.38  2003/05/13 16:38:38  joko
10    #  problems with "tied" on 5.6.1/win32
11    #
12    #  Revision 1.37  2003/05/10 17:37:39  jonen
13    #  corrected last commit
14    #
15    #  Revision 1.36  2003/05/10 17:31:18  jonen
16    #  + added new functions related to 'create' item
17    #   - createNode()
18    #     # creates non-persistent 'deep dummy filled' object
19    #   - insertChildNode()
20    #     # inserts child node at given parent (child node haven't to exists,
21    #         createNode will be injected transparently)
22    #
23    #  Revision 1.35  2003/04/19 16:09:48  jonen
24    #  + added operator dispatching (currently for getting ref-type) at 'getListFiltered'
25    #
26    #  Revision 1.34  2003/04/11 01:18:53  joko
27    #  sendQuery:
28    #  + introduced crud action 'DELETE'
29    #
30  #  Revision 1.33  2003/04/09 06:07:43  joko  #  Revision 1.33  2003/04/09 06:07:43  joko
31  #  revamped 'sub sendQuery'  #  revamped 'sub sendQuery'
32  #  #
# Line 502  sub getListFiltered { Line 526  sub getListFiltered {
526    #    objects => $objects,    #    objects => $objects,
527    #  );    #  );
528        
529      # HACK: build eval-string (sorry) to get filtered list - please give advice here      # TODO: is_op?
530      push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";      # dispatch un-common operators if exists
531        if($filter->{op} eq "ref") {
532          # do nothing, results will be filtered later cause 'tangram-filter' doesn't support 'ref' query
533          #print "Filter->op eq 'ref'.\n";
534          #push @tfilters, 'ref($remote->{' . $filter->{key} . '})' . " eq '$filter->{val}'";
535        } else {
536          # HACK: build eval-string (sorry) to get filtered list - please give advice here
537          push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
538        }
539    
540    }    }
541    
# Line 525  sub getListFiltered { Line 557  sub getListFiltered {
557    @results = eval($evalstring);    @results = eval($evalstring);
558    die $@ if $@;    die $@ if $@;
559        
560    
561      # filter results
562      if($filters->[0]->{op} eq "ref") {
563          #print "Filter->op eq 'ref'.\n";
564          my $att_name = $filters->[0]->{key};
565          my $att_val = $filters->[0]->{val};
566          my @filtered;
567          foreach(@results) {
568            if(ref($_->{$att_name}) eq $att_val) {
569              push @filtered, $_;
570            }
571          }
572          @results = @filtered;
573      }
574    
575      #print "results: " . Dumper(\@results);
576      
577    return \@results;    return \@results;
578  }  }
579    
# Line 564  sub sendQuery { Line 613  sub sendQuery {
613    # mode = OID|SPECIAL    # mode = OID|SPECIAL
614    my $mode = '';    my $mode = '';
615    my $ident = '';    my $ident = '';
616    my $action = '';    my $crud = '';
617        
618        
619    # dispatch type and mode    # dispatch type and mode
620        
621      # defaults - 1      # defaults - 1
622      if ($query->{options}) {      if ($query->{options}) {
623        $action = $query->{options}->{action};        $crud = $query->{options}->{crud};
624          $crud ||= $query->{options}->{action};
625      }      }
626    
627      # defaults - 2      # defaults - 2
628      $type ||= 'TRANSPARENT';      $type ||= 'TRANSPARENT';
629      $action ||= 'load';      $crud ||= 'RETRIEVE';
630    
631      if ($query->{options}->{OID}) {      if ($query->{options}->{OID}) {
632        $type = 'ITEM';        $type = 'ITEM';
# Line 585  sub sendQuery { Line 635  sub sendQuery {
635            
636      } elsif (my $guid = $query->{options}->{GUID}) {      } elsif (my $guid = $query->{options}->{GUID}) {
637        $type = 'TRANSPARENT';        $type = 'TRANSPARENT';
638        $query->{criterias} = [ { key => 'guid', op => 'eq', val => $guid } ];        $query->{criterias} = [ { key => 'guid', op => 'eq', val => $guid } ];    
639        
640        # if operator is different (dispatcher for 'getListFiltered')
641        } elsif (my $op = $query->{options}->{op}) {
642          $type = 'TRANSPARENT';
643          $query->{criterias} = [ { key => $query->{options}->{meta_label}, op => $op, val => $query->{options}->{meta_value} } ];    
644    
645      }      }
646        
647      # HACK: special case: querying by id does not translate into a common tangram query      # HACK: special case: querying by id does not translate into a common tangram query
# Line 604  sub sendQuery { Line 659  sub sendQuery {
659    if ($type eq 'ITEM' && $ident) {    if ($type eq 'ITEM' && $ident) {
660    
661      if ($mode eq 'OID') {          if ($mode eq 'OID') {    
662          # TODO: review this case!
663        $result = $self->getObject($ident, $query->{options});        $result = $self->getObject($ident, $query->{options});
664            
665      } elsif ($mode eq 'SPECIAL.SYNC') {      } elsif ($mode eq 'SPECIAL.SYNC') {
# Line 635  sub sendQuery { Line 691  sub sendQuery {
691        
692    } elsif ($type eq 'TRANSPARENT') {    } elsif ($type eq 'TRANSPARENT') {
693    
694      if ($action eq 'load') {      if ($crud eq 'RETRIEVE') {
695    
696        my $list = $self->getListFiltered($query->{node}, $query->{criterias});        my $list = $self->getListFiltered($query->{node}, $query->{criterias});
697        #return $self->createSet($object);        #return $self->createSet($object);
# Line 662  sub sendQuery { Line 718  sub sendQuery {
718        #my $res = $self->{COREHANDLE}->select($h, $h->{);        #my $res = $self->{COREHANDLE}->select($h, $h->{);
719        $result = $self->createCursor($query->{node});        $result = $self->createCursor($query->{node});
720    
721      } elsif ($action eq 'save') {      } elsif ($crud eq 'UPDATE') {
722    
723        # 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) ...
724        my $childquery = deep_copy($query);        my $childquery = deep_copy($query);
725        $childquery->{options}->{action} = 'load';        $childquery->{options}->{crud} = 'RETRIEVE';
726        delete $childquery->{payload};        delete $childquery->{payload};
727    
728        # ... to use it to fetch fresh object using ourselves (sendQuery).        # ... to use it to fetch a fresh object using ourselves (sendQuery).
729        my $cursor = $self->sendQuery($childquery);        my $cursor = $self->sendQuery($childquery);
730        my $status = $cursor->getStatus();        my $status = $cursor->getStatus();
731        my $object = $cursor->getNextEntry();        my $object = $cursor->getNextEntry();
# Line 681  sub sendQuery { Line 737  sub sendQuery {
737        # Execute update operation at orm.        # Execute update operation at orm.
738        $self->update($object);        $self->update($object);
739            
740        } elsif ($crud eq 'DELETE') {
741    
742          # Patch current query to be a loader (e.g. change action) ...
743          my $childquery = deep_copy($query);
744          $childquery->{options}->{crud} = 'RETRIEVE';
745    
746          # ... to use it to fetch a fresh object using ourselves (sendQuery).
747          my $cursor = $self->sendQuery($childquery);
748          my $status = $cursor->getStatus();
749          my $object = $cursor->getNextEntry();
750    
751          $self->erase($object);
752    
753        } elsif ($crud eq 'CREATE') {
754          
755          my $nodename = $query->{node};      
756          my $newnode = $self->createNode($nodename);
757          my $id = $self->{_COREHANDLE}->insert($newnode);
758      
759          print "Saved new node $nodename with GUID $newnode->{guid}, OID '$id': " . Dumper($newnode) . "\n";
760          
761          return $newnode;
762    
763      }      }
764    
765    }    }
# Line 835  sub disconnect2 { Line 914  sub disconnect2 {
914    $self->{dataStorageLayer}->disconnect();    $self->{dataStorageLayer}->disconnect();
915  }  }
916    
917    
918    sub createNode {
919      my $self = shift;
920      my $classname = shift;
921    
922      my $obj = $classname->new();
923      
924      my $attr_options = Class::Tangram::attribute_options($classname);
925      #print "Attribute Options: " . Dumper($attr_options);
926    
927      my $attr_types = Class::Tangram::attribute_types($classname);
928      #print "Attribute Types: " . Dumper($attr_types);
929      
930      foreach(keys %{$attr_types}) {
931        if($attr_types->{$_} eq 'string') {
932          $obj->{$_} = '';
933        } elsif($attr_types->{$_} eq 'int') {
934          $obj->{$_} = 0;
935        } elsif($attr_types->{$_} eq 'real') {
936          $obj->{$_} = 0;
937        } elsif($attr_types->{$_} eq 'rawdatetime') {
938          $obj->{$_} = '0000-00-00 00:00:00';
939        } elsif($attr_types->{$_} eq 'ref') {
940          if($attr_options->{$_}->{class}) {
941            $obj->{$_} = $self->createNode($attr_options->{$_}->{class});
942          } else {
943            #$obj->{$_} = undef();
944          }
945        } elsif($attr_types->{$_} eq 'iarray') {
946            $obj->{$_} = [ ];
947        } elsif($attr_types->{$_} eq 'hash') {
948            $obj->{$_} = {  };
949        } elsif($attr_types->{$_} eq 'flat_hash') {
950            $obj->{$_} = { };
951        }
952      }
953      
954      #print "New Object: " . Dumper($obj);
955      
956      return $obj;
957    }
958    
959    
960      sub insertChildNode {
961        my $self = shift;
962        my $child_entry = shift;
963        my $query_args = shift;
964        
965        my $core = $self->{_COREHANDLE};
966        my $nodename = $query_args->{nodename};
967        
968        # get parent object
969        my $query = {
970              node => $query_args->{parent}->{nodename},
971              options => { GUID => $query_args->{parent}->{guid}, },
972              };
973        my $cursor = $self->sendQuery($query);
974        my $parent = $cursor->getNextEntry();
975    
976        # debug
977        #print "Parent_org: " . Dumper($parent);
978            
979        # Create child node object if isn't already done
980        # ($child_entry have to be the class name then...)
981        if(!ref($child_entry)) {
982          $child_entry = $self->createNode($child_entry);
983          # it could be insert 'manually' or will be insert 'transparent' if parent will be updated
984          #$core->insert($child_entry);
985          #print "Create child object [$nodename]: " . Dumper($child_entry);
986        }
987    
988        # get reference of tied node (seems, only on Linux node's are tied!!)
989        my $tied_node = tied $parent->{$nodename};
990    
991        # insert/change child entry at parent
992        #print "reference: " . ref($parent->{$nodename}) . "\n";
993        if(ref($parent->{$nodename}) eq 'ARRAY') {
994          # (seems, only on Linux node's are tied!!)
995          if($tied_node) {
996            # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type,
997            # so a 'PUSH' is not implemented (which could be then done transparently)
998            my $array = $tied_node->FETCH;
999            push @$array, $child_entry;
1000            $tied_node->STORE($array);
1001            # node will be normaly untied at 'STORE'
1002            if(tied $parent->{$nodename}) { print "already tied !!\n"; }
1003            else { undef $tied_node; }
1004          } else {
1005            push @{$parent->{$nodename}}, $child_entry;
1006          }
1007        }
1008        elsif(ref($parent->{$nodename}) eq 'HASH') {
1009          if(my $key = $query_args->{hash_key}) {
1010            # (seems, only on Linux node's are tied!!)
1011            if($tied_node) {
1012              # same problem as with 'ARRAY':
1013              # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type.
1014              my $hash = $tied_node->FETCH;
1015              $hash->{$key} = $child_entry;
1016              $tied_node->STORE($hash);
1017              # node will be normaly untied at 'STORE'
1018              if(tied $parent->{$nodename}) { print "already tied !!\n"; }
1019              else { undef $tied_node; }
1020            } else {
1021              $parent->{$nodename}->{$key} = $child_entry;
1022            }
1023          } else {
1024           print "ERROR: No HASH KEY given, so not able to insert hash entry!";
1025          }
1026        }
1027        else {
1028          $parent->{$nodename} = $child_entry;
1029        }
1030    
1031        # debug
1032        #print "Parent_new: " . Dumper($parent);
1033        
1034        # save parent
1035        $core->update($parent);
1036        
1037        # debug
1038        #print "Saved Parent: ". Dumper($parent);
1039        
1040        return $child_entry;
1041      }
1042    
1043    
1044  1;  1;
1045  __END__  __END__
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