/[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 1.36 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
20    #  revamped 'sub sendQuery'
21    #
22  #  Revision 1.32  2003/04/08 22:52:22  joko  #  Revision 1.32  2003/04/08 22:52:22  joko
23  #  modified 'querySchema': better behaviour regarding filtering result  #  modified 'querySchema': better behaviour regarding filtering result
24  #  #
# Line 137  use Tangram; Line 153  use Tangram;
153  use DesignPattern::Object;  use DesignPattern::Object;
154  use Data::Storage::Result::Tangram;  use Data::Storage::Result::Tangram;
155  use Data::Mungle::Compare::Struct qw( isEmpty );  use Data::Mungle::Compare::Struct qw( isEmpty );
156  use Data::Mungle::Transform::Deep qw( expand );  use Data::Mungle::Transform::Deep qw( expand deep_copy merge_to );
157    
158  # get logger instance  # get logger instance
159  my $logger = Log::Dispatch::Config->instance;  my $logger = Log::Dispatch::Config->instance;
# Line 499  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 553  sub createSet { Line 575  sub createSet {
575  sub sendQuery {  sub sendQuery {
576    my $self = shift;    my $self = shift;
577    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($sql);  
578    
579    #print Dumper($query);    #print Dumper($query);
580    
581    # HACK: special case: querying by id does not translate into a common tangram query    # type = ITEM|LIST|TRANSPARENT
582    # just load the object by given id(ent)    my $type = '';
583    if ($query->{criterias} && ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq')) {    # mode = OID|SPECIAL
584      #print "LOAD!!!", "\n";    my $mode = '';
585      #exit;    my $ident = '';
586      #return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );    my $crud = '';
587      my $ident = $query->{criterias}->[0]->{val};    
588  #print "load obj", "\n";    
589      #return $self->createSet() if $ident == 5;    # dispatch type and mode
590      $self->{_COREHANDLE}->unload($ident);    
591      my $object = $self->{_COREHANDLE}->load($ident);      # defaults - 1
592  #print "get id", "\n";      if ($query->{options}) {
593      my $oid = $self->{_COREHANDLE}->id($object);        $crud = $query->{options}->{crud};
594  #print Dumper($object);        $crud ||= $query->{options}->{action};
595  #print "oid: $oid", "\n";      }
596      return $self->createSet($object);  
597      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );      # defaults - 2
598    }      $type ||= 'TRANSPARENT';
599        $crud ||= 'RETRIEVE';
600    my $list = $self->getListFiltered($query->{node}, $query->{criterias});  
601    #return $self->createSet($object);      if ($query->{options}->{OID}) {
602    #return $self->createSet($list);        $type = 'ITEM';
603    return $self->createSet(@$list);        $mode = 'OID';
604          $ident = $query->{options}->{OID};
605    #die("This should not be reached for now - redirect to \$self->getListFiltered() here!");      
606        } elsif (my $guid = $query->{options}->{GUID}) {
607          $type = 'TRANSPARENT';
608          $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 => $query->{options}->{meta_value} } ];    
614    
615        }
616      
617        # HACK: special case: querying by id does not translate into a common tangram query
618        # just load the object by given identifier (OID) named 'id' - this is required by Data::Transfer::Sync!
619        if ($query->{criterias} && ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq')) {
620          $type = 'ITEM';
621          $mode = 'SPECIAL.SYNC';
622          $ident = $query->{criterias}->[0]->{val};
623        }
624      
625    
626      # execute query
627      my $result;
628    
629      if ($type eq 'ITEM' && $ident) {
630    
631        if ($mode eq 'OID') {    
632          # TODO: review this case!
633          $result = $self->getObject($ident, $query->{options});
634        
635        } elsif ($mode eq 'SPECIAL.SYNC') {
636    
637          # V1 - failed
638          #return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );
639      
640          # hmm....
641          #return $self->createSet() if $ident == 5;
642          
643          # Unload single object before doing any further operations to
644          # expect a "fresh" object from orm when performing the next calls.
645          $self->{_COREHANDLE}->unload($ident);
646          
647          # Load object from orm.
648          my $object = $self->{_COREHANDLE}->load($ident);
649      
650          # determine object identifier (OID)
651          my $oid = $self->{_COREHANDLE}->id($object);
652          
653          # encapsulate into result/response container and return this one
654          $result = $self->createSet($object);
655          
656          # debugging
657          #$result = $self->createSet( $self->{COREHANDLE}->load('300090018') );
658    
659        }
660        
661      
662      } elsif ($type eq 'TRANSPARENT') {
663    
664        if ($crud eq 'RETRIEVE') {
665    
666          my $list = $self->getListFiltered($query->{node}, $query->{criterias});
667          #return $self->createSet($object);
668          #return $self->createSet($list);
669          return $self->createSet(@$list);
670        
671          #die("This should not be reached for now - redirect to \$self->getListFiltered() here!");
672        
673          # try a generic tangram query here
674          # TODO: try to place an oql on top of that (search.cpan.org!)
675          my @crits;
676          foreach (@{$query->{criterias}}) {
677            my $op = '';
678            $op = '=' if lc $_->{op} eq 'eq';
679            push @crits, "$_->{key}$op'$_->{val}'";
680          }
681          my $subnodes = {};
682          map { $subnodes->{$_}++ } @{$query->{subnodes}};
683          # HACK: this is hardcoded ;(    expand possibilities!
684          #my $crit = join(' AND ', @crits);
685          #my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit);
686          #return $self->sendCommand($sql);
687          #my $h = $self->{COREHANDLE}->remote($query->{node});
688          #my $res = $self->{COREHANDLE}->select($h, $h->{);
689          $result = $self->createCursor($query->{node});
690    
691        } elsif ($crud eq 'UPDATE') {
692    
693          # Patch current query to be a loader (e.g. change action, remove payload) ...
694          my $childquery = deep_copy($query);
695          $childquery->{options}->{crud} = 'RETRIEVE';
696          delete $childquery->{payload};
697    
698          # ... to use it to fetch a fresh object using ourselves (sendQuery).
699          my $cursor = $self->sendQuery($childquery);
700          my $status = $cursor->getStatus();
701          my $object = $cursor->getNextEntry();
702    
703          # Merge values and apply value modifiers.
704          my $options = { utf8 => 1, php => 1 };
705          merge_to($object, $query->{payload}, $options);
706    
707          # Execute update operation at orm.
708          $self->update($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      }
736    
737      return $result;
738    
   # try a generic tangram query here  
   # TODO: try to place an oql on top of that (search.cpan.org!)  
   my @crits;  
   foreach (@{$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});  
739  }  }
740    
741  sub eraseAll {  sub eraseAll {
# Line 639  sub getObject { Line 771  sub getObject {
771    return $object if $object;    return $object if $object;
772  }  }
773    
774  sub getObjectByGuid {  sub getObjectByGuid_old {
775    my $self = shift;    my $self = shift;
776    my $guid = shift;    my $guid = shift;
777    my $options = shift;    my $options = shift;
# Line 669  sub getObjectByGuid { Line 801  sub getObjectByGuid {
801        
802  }  }
803    
804  sub getObjectAsHash {  sub getObjectAsHash_old {
805    my $self = shift;    my $self = shift;
806    my $oid = shift;    my $oid = shift;
807    my $options = shift;      my $options = shift;  
# Line 752  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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