/[cvs]/nfo/perl/libs/Data/Storage/Handler/Tangram.pm
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revision 1.31 by joko, Sat Apr 5 21:24:09 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
21    #  sendQuery:
22    #  + introduced crud action 'DELETE'
23    #
24    #  Revision 1.33  2003/04/09 06:07:43  joko
25    #  revamped 'sub sendQuery'
26    #
27    #  Revision 1.32  2003/04/08 22:52:22  joko
28    #  modified 'querySchema': better behaviour regarding filtering result
29    #
30  #  Revision 1.31  2003/04/05 21:24:09  joko  #  Revision 1.31  2003/04/05 21:24:09  joko
31  #  modified 'sub getChildNodes': now contains code from 'querySchema'  #  modified 'sub getChildNodes': now contains code from 'querySchema'
32  #  #
# Line 134  use Tangram; Line 158  use Tangram;
158  use DesignPattern::Object;  use DesignPattern::Object;
159  use Data::Storage::Result::Tangram;  use Data::Storage::Result::Tangram;
160  use Data::Mungle::Compare::Struct qw( isEmpty );  use Data::Mungle::Compare::Struct qw( isEmpty );
161  use Data::Mungle::Transform::Deep qw( expand );  use Data::Mungle::Transform::Deep qw( expand deep_copy merge_to );
162    
163  # get logger instance  # get logger instance
164  my $logger = Log::Dispatch::Config->instance;  my $logger = Log::Dispatch::Config->instance;
# Line 235  sub getChildNodes { Line 259  sub getChildNodes {
259    
260    my $self = shift;    my $self = shift;
261    my $mode = shift;    my $mode = shift;
262      my $filter = shift;
263      
264    $mode ||= 'core';    $mode ||= 'core';
265      $filter ||= 'all';
266        
267    $logger->debug( __PACKAGE__ . "->getChildNodes($mode)" );    $logger->debug( __PACKAGE__ . "->getChildNodes($mode)" );
268    
# Line 277  sub getChildNodes { Line 304  sub getChildNodes {
304        push @concret_names, $_  if (!Class::Tangram::class_is_abstract($_));        push @concret_names, $_  if (!Class::Tangram::class_is_abstract($_));
305        $o_cnt++;        $o_cnt++;
306      }      }
307      
308      my $result = {      if ($filter eq 'all') {
309        all => \@object_names,        return \@object_names;
310        concrete => \@concret_names,      } elsif ($filter eq 'concrete') {
311      };        return \@concret_names;
312      return $result;      }
313        
314    }    }
315        
# Line 493  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 547  sub createSet { Line 580  sub createSet {
580  sub sendQuery {  sub sendQuery {
581    my $self = shift;    my $self = shift;
582    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($sql);  
583    
584    #print Dumper($query);    #print Dumper($query);
585    
586    # HACK: special case: querying by id does not translate into a common tangram query    # type = ITEM|LIST|TRANSPARENT
587    # just load the object by given id(ent)    my $type = '';
588    if ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq') {    # mode = OID|SPECIAL
589      #print "LOAD!!!", "\n";    my $mode = '';
590      #exit;    my $ident = '';
591      #return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );    my $crud = '';
592      my $ident = $query->{criterias}->[0]->{val};    
593  #print "load obj", "\n";    
594      #return $self->createSet() if $ident == 5;    # dispatch type and mode
595      $self->{_COREHANDLE}->unload($ident);    
596      my $object = $self->{_COREHANDLE}->load($ident);      # defaults - 1
597  #print "get id", "\n";      if ($query->{options}) {
598      my $oid = $self->{_COREHANDLE}->id($object);        $crud = $query->{options}->{crud};
599  #print Dumper($object);        $crud ||= $query->{options}->{action};
600  #print "oid: $oid", "\n";      }
601      return $self->createSet($object);  
602      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );      # defaults - 2
603    }      $type ||= 'TRANSPARENT';
604        $crud ||= 'RETRIEVE';
605    my $list = $self->getListFiltered($query->{node}, $query->{criterias});  
606    #return $self->createSet($object);      if ($query->{options}->{OID}) {
607    #return $self->createSet($list);        $type = 'ITEM';
608    return $self->createSet(@$list);        $mode = 'OID';
609          $ident = $query->{options}->{OID};
610    #die("This should not be reached for now - redirect to \$self->getListFiltered() here!");      
611        } elsif (my $guid = $query->{options}->{GUID}) {
612          $type = 'TRANSPARENT';
613          $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 => $query->{options}->{meta_value} } ];    
619    
620        }
621      
622        # HACK: special case: querying by id does not translate into a common tangram query
623        # just load the object by given identifier (OID) named 'id' - this is required by Data::Transfer::Sync!
624        if ($query->{criterias} && ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq')) {
625          $type = 'ITEM';
626          $mode = 'SPECIAL.SYNC';
627          $ident = $query->{criterias}->[0]->{val};
628        }
629      
630    
631      # execute query
632      my $result;
633    
634      if ($type eq 'ITEM' && $ident) {
635    
636        if ($mode eq 'OID') {    
637          # TODO: review this case!
638          $result = $self->getObject($ident, $query->{options});
639        
640        } elsif ($mode eq 'SPECIAL.SYNC') {
641    
642          # V1 - failed
643          #return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );
644      
645          # hmm....
646          #return $self->createSet() if $ident == 5;
647          
648          # Unload single object before doing any further operations to
649          # expect a "fresh" object from orm when performing the next calls.
650          $self->{_COREHANDLE}->unload($ident);
651          
652          # Load object from orm.
653          my $object = $self->{_COREHANDLE}->load($ident);
654      
655          # determine object identifier (OID)
656          my $oid = $self->{_COREHANDLE}->id($object);
657          
658          # encapsulate into result/response container and return this one
659          $result = $self->createSet($object);
660          
661          # debugging
662          #$result = $self->createSet( $self->{COREHANDLE}->load('300090018') );
663    
664        }
665        
666      
667      } elsif ($type eq 'TRANSPARENT') {
668    
669        if ($crud eq 'RETRIEVE') {
670    
671          my $list = $self->getListFiltered($query->{node}, $query->{criterias});
672          #return $self->createSet($object);
673          #return $self->createSet($list);
674          return $self->createSet(@$list);
675        
676          #die("This should not be reached for now - redirect to \$self->getListFiltered() here!");
677        
678          # try a generic tangram query here
679          # TODO: try to place an oql on top of that (search.cpan.org!)
680          my @crits;
681          foreach (@{$query->{criterias}}) {
682            my $op = '';
683            $op = '=' if lc $_->{op} eq 'eq';
684            push @crits, "$_->{key}$op'$_->{val}'";
685          }
686          my $subnodes = {};
687          map { $subnodes->{$_}++ } @{$query->{subnodes}};
688          # HACK: this is hardcoded ;(    expand possibilities!
689          #my $crit = join(' AND ', @crits);
690          #my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit);
691          #return $self->sendCommand($sql);
692          #my $h = $self->{COREHANDLE}->remote($query->{node});
693          #my $res = $self->{COREHANDLE}->select($h, $h->{);
694          $result = $self->createCursor($query->{node});
695    
696        } elsif ($crud eq 'UPDATE') {
697    
698          # Patch current query to be a loader (e.g. change action, remove payload) ...
699          my $childquery = deep_copy($query);
700          $childquery->{options}->{crud} = 'RETRIEVE';
701          delete $childquery->{payload};
702    
703          # ... to use it to fetch a fresh object using ourselves (sendQuery).
704          my $cursor = $self->sendQuery($childquery);
705          my $status = $cursor->getStatus();
706          my $object = $cursor->getNextEntry();
707    
708          # Merge values and apply value modifiers.
709          my $options = { utf8 => 1, php => 1 };
710          merge_to($object, $query->{payload}, $options);
711    
712          # Execute update operation at orm.
713          $self->update($object);
714        
715        } elsif ($crud eq 'DELETE') {
716    
717          # Patch current query to be a loader (e.g. change action) ...
718          my $childquery = deep_copy($query);
719          $childquery->{options}->{crud} = 'RETRIEVE';
720    
721          # ... to use it to fetch a fresh object using ourselves (sendQuery).
722          my $cursor = $self->sendQuery($childquery);
723          my $status = $cursor->getStatus();
724          my $object = $cursor->getNextEntry();
725    
726          $self->erase($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      }
741    
742      return $result;
743    
   # try a generic tangram query here  
   # TODO: try to place an oql on top of that (search.cpan.org!)  
   my @crits;  
   foreach (@{$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});  
744  }  }
745    
746  sub eraseAll {  sub eraseAll {
# Line 633  sub getObject { Line 776  sub getObject {
776    return $object if $object;    return $object if $object;
777  }  }
778    
779  sub getObjectByGuid {  sub getObjectByGuid_old {
780    my $self = shift;    my $self = shift;
781    my $guid = shift;    my $guid = shift;
782    my $options = shift;    my $options = shift;
# Line 663  sub getObjectByGuid { Line 806  sub getObjectByGuid {
806        
807  }  }
808    
809  sub getObjectAsHash {  sub getObjectAsHash_old {
810    my $self = shift;    my $self = shift;
811    my $oid = shift;    my $oid = shift;
812    my $options = shift;      my $options = shift;  
# Line 746  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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