/[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 1.43 by jonen, Wed Jul 2 11:07:12 2003 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.43  2003/07/02 11:07:12  jonen
7    #  re-activate filtering of results *after* results are fetched from tangram
8    #    (needed for e.g. UserManagment)
9    #
10    #  Revision 1.42  2003/07/01 23:24:17  joko
11    #  now using package before using function
12    #
13    #  Revision 1.41  2003/06/29 02:03:45  joko
14    #  fix:? initialize schema on startup
15    #
16    #  Revision 1.40  2003/06/25 22:57:54  joko
17    #  major rework of "sub sendQuery / sub getListFiltered": now should be capable of "sorting"
18    #
19    #  Revision 1.39  2003/06/06 11:40:40  jonen
20    #  fixed bug at 'getFilteredList'
21    #
22    #  Revision 1.38  2003/05/13 16:38:38  joko
23    #  problems with "tied" on 5.6.1/win32
24    #
25    #  Revision 1.37  2003/05/10 17:37:39  jonen
26    #  corrected last commit
27    #
28    #  Revision 1.36  2003/05/10 17:31:18  jonen
29    #  + added new functions related to 'create' item
30    #   - createNode()
31    #     # creates non-persistent 'deep dummy filled' object
32    #   - insertChildNode()
33    #     # inserts child node at given parent (child node haven't to exists,
34    #         createNode will be injected transparently)
35    #
36    #  Revision 1.35  2003/04/19 16:09:48  jonen
37    #  + added operator dispatching (currently for getting ref-type) at 'getListFiltered'
38    #
39    #  Revision 1.34  2003/04/11 01:18:53  joko
40    #  sendQuery:
41    #  + introduced crud action 'DELETE'
42    #
43  #  Revision 1.33  2003/04/09 06:07:43  joko  #  Revision 1.33  2003/04/09 06:07:43  joko
44  #  revamped 'sub sendQuery'  #  revamped 'sub sendQuery'
45  #  #
# Line 136  use base ("Data::Storage::Handler::Abstr Line 173  use base ("Data::Storage::Handler::Abstr
173    
174  use Data::Dumper;  use Data::Dumper;
175  use Tangram;  use Tangram;
176    use Class::Tangram;
177    
178  use DesignPattern::Object;  use DesignPattern::Object;
179  use Data::Storage::Result::Tangram;  use Data::Storage::Result::Tangram;
# Line 163  sub _initSchema { Line 201  sub _initSchema {
201    #if (!$schema_tangram) {    #if (!$schema_tangram) {
202      #my $obj = getNewPerlObjectByPkgName($self->{locator}->{schema}, { EXPORT_OBJECTS => $self->{locator}->{classnames}, want_transactions => $self->{locator}->{want_transactions} } );      #my $obj = getNewPerlObjectByPkgName($self->{locator}->{schema}, { EXPORT_OBJECTS => $self->{locator}->{classnames}, want_transactions => $self->{locator}->{want_transactions} } );
203      my $obj = DesignPattern::Object->fromPackage($self->{locator}->{schema}, { 'EXPORT_OBJECTS' => $self->{locator}->{classnames}, 'want_transactions' => $self->{locator}->{want_transactions} } );      my $obj = DesignPattern::Object->fromPackage($self->{locator}->{schema}, { 'EXPORT_OBJECTS' => $self->{locator}->{classnames}, 'want_transactions' => $self->{locator}->{want_transactions} } );
204      $schema_tangram = $obj->getSchema();      $schema_tangram = $obj->getSchema() if $obj;
205    #}    #}
206    if (!$schema_tangram) {    if (!$schema_tangram) {
207      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{locator}->{schema}." );
208      return 0;      return 0;
209    }    }
210    #$self->_patchSchema();    #$self->_patchSchema();
# Line 212  sub connect { Line 250  sub connect {
250  #      return;  #      return;
251  #    }  #    }
252    
253      #return unless $self->_initSchema();      return unless $self->_initSchema();
254      $self->_initSchema();      #$self->_initSchema();
255    
256      # create the main tangram storage object      # create the main tangram storage object
257      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
# Line 475  sub getListFiltered { Line 513  sub getListFiltered {
513    # redirect to unfiltered mode    # redirect to unfiltered mode
514    #return $self->getListUnfiltered(@_);    #return $self->getListUnfiltered(@_);
515    
516    my $nodename = shift;    my $in = {};
517    my $filters = shift;    $in->{nodename} = shift;
518      $in->{filters} = shift;
519      $in->{sorting} = shift;
520      
521    my @results;    my @results;
522    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $in->{nodename} . "' )" );
523    
524      #print Dumper($filters);
525    
526  #print Dumper($filters);    # 1. "Remote Object Handle" - get set of objects from odbms by object name
527      my $remote = $self->{_COREHANDLE}->remote($in->{nodename});
528      
529      # 2. Transfer $in to $orm_query
530      my $orm_query = {};
531        
532      # 2.a. Filters
533    my @tfilters;    my @tfilters;
534      my $orm_filter = undef;
535        
536    foreach my $filter (@$filters) {    foreach my $filter (@{$in->{filters}}) {
537        
538      # get filter - TODO: for each filter      # get filter - TODO: for each filter
539      #my $filter = $filters->[0];      #my $filter = $filters->[0];
540      
541      # build filter      # 1. The parts of a filter source entry
542      my $lexpr = $filter->{key};      my $lexpr = $filter->{key};
543      #my $op = $filter->{op};      #my $op = $filter->{op};
544      my $op = '=';      my $op = '=';
545      my $rexpr = $filter->{val};      my $rexpr = $filter->{val};
546      my $tight = 100;      my $tight = 100;
547    
548        # 2. Build filter target entry
549            
550    #  my $tfilter = Tangram::Filter->new(      # Test 1 - didn't work out!
551    #    expr => "t1.$lexpr $op '$rexpr'",      #  my $tfilter = Tangram::Filter->new(
552    #    tight => $tight,      #    expr => "t1.$lexpr $op '$rexpr'",
553    #    objects => $objects,      #    tight => $tight,
554    #  );      #    objects => $objects,
555          #  );
556      # HACK: build eval-string (sorry) to get filtered list - please give advice here  
557      push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";      my $orm_filter_tmp = undef;
558        # was:
559        # TODO: is_op?
560        # dispatch un-common operators if exists
561        if ($filter->{op} eq "ref") {
562          # do nothing, results will be filtered later cause 'tangram-filter' doesn't support 'ref' query
563          #print "Filter->op eq 'ref'.\n";
564          #push @tfilters, 'ref($remote->{' . $filter->{key} . '})' . " eq '$filter->{val}'";
565        } else {
566          # HACK: build eval-string (sorry) to get filtered list - please give advice here
567          #push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
568          # better: calculate expression right here!
569          #push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
570          
571          #print "key: ", $filter->{key}, "\n";
572          
573          my $left = $remote->{$filter->{key}};
574          #my $r = Tangram::Expr->new( 'string' => "'" . $filter->{val} . "'" );
575          my $right = $filter->{val};
576          my $op = $filter->{op};
577          $orm_filter_tmp = $left->$op($right);
578        }
579    
580        if (not $orm_filter) {
581          $orm_filter = $orm_filter_tmp;
582        } else {
583          $orm_filter = $orm_filter->and($orm_filter_tmp);
584        }
585    
586    }    }
587    
588    my $tfilter = join(' & ', @tfilters);    $orm_query->{filter} = $orm_filter;
589    
   # get set of objects from odbms by object name  
   my $remote = $self->{_COREHANDLE}->remote($nodename);  
     
590    # was:    # was:
591    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);  
592      # 2.b. sorting [new as of 2003-06-17]
593      if ($in->{sorting}) {
594        my $sorting_rules = [];
595        my $sorting_order = 'ASC';
596        foreach my $sorting_column (keys %{$in->{sorting}}) {
597          $sorting_order = $in->{sorting}->{$sorting_column} if $in->{sorting}->{$sorting_column};
598          push @$sorting_rules, Tangram::Expr->new( 'string' => $sorting_column );
599        }
600        $orm_query->{order} = $sorting_rules;
601        if ($sorting_order eq 'DESC') {
602          $orm_query->{desc} = 1;
603        }
604      }
605    
606    
607      # 3. build and issue query - return result as Tangram::Cursor
608      
609      # coerce hash into array (This is valid in Perl)
610      my @orm_query_args = %$orm_query;
611      # send query (arguments) to orm
612      @results = $self->{_COREHANDLE}->select($remote, @orm_query_args);
613      
614      #my $cursor = $self->{_COREHANDLE}->cursor($remote, @orm_query_args);
615      #return $cursor;
616      #print Dumper(@results);
617    
618    # is:    # is:
619    # HACK: build eval-string (sorry) to get filtered list - please give advice here    # HACK: build eval-string (sorry) to get filtered list - please give advice here
620    my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';      #my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . $sorting . ');';
621          #print "eval: $evalstring", "\n";
622    #print "eval: $evalstring", "\n";      # get filtered list/set
623          #@results = eval($evalstring);
624    # get filtered list/set      #die $@ if $@;
625    @results = eval($evalstring);  
626    die $@ if $@;    # filter results - NEEDED for e.g. UserManagment !!
627      if ($in->{filters}->[0]->{op} && ($in->{filters}->[0]->{op} eq "ref")) {
628          #print "Filter->op eq 'ref'.\n";
629          my $att_name = $in->{filters}->[0]->{key};
630          my $att_val = $in->{filters}->[0]->{val};
631          my @filtered;
632          foreach(@results) {
633            if(ref($_->{$att_name}) eq $att_val) {
634              push @filtered, $_;
635            }
636          }
637          @results = @filtered;
638      }
639    
640      #print "results: " . Dumper(\@results);
641        
642    return \@results;    return \@results;
643  }  }
# Line 553  sub createSet { Line 667  sub createSet {
667    return $result;    return $result;
668  }  }
669    
670    sub createResult {
671      my $self = shift;
672      my $rh = shift;
673      my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
674      return $result;
675    }
676    
677  sub sendQuery {  sub sendQuery {
678    my $self = shift;    my $self = shift;
679    my $query = shift;    my $query = shift;
# Line 564  sub sendQuery { Line 685  sub sendQuery {
685    # mode = OID|SPECIAL    # mode = OID|SPECIAL
686    my $mode = '';    my $mode = '';
687    my $ident = '';    my $ident = '';
688    my $action = '';    my $crud = '';
689        
690        
691    # dispatch type and mode    # dispatch type and mode
692        
693      # defaults - 1      # defaults - 1
694      if ($query->{options}) {      if ($query->{options}) {
695        $action = $query->{options}->{action};        $crud = $query->{options}->{crud};
696          $crud ||= $query->{options}->{action};
697      }      }
698    
699      # defaults - 2      # defaults - 2
700      $type ||= 'TRANSPARENT';      $type ||= 'TRANSPARENT';
701      $action ||= 'load';      $crud ||= 'RETRIEVE';
702    
703      if ($query->{options}->{OID}) {      if ($query->{options}->{OID}) {
704        $type = 'ITEM';        $type = 'ITEM';
# Line 585  sub sendQuery { Line 707  sub sendQuery {
707            
708      } elsif (my $guid = $query->{options}->{GUID}) {      } elsif (my $guid = $query->{options}->{GUID}) {
709        $type = 'TRANSPARENT';        $type = 'TRANSPARENT';
710        $query->{criterias} = [ { key => 'guid', op => 'eq', val => $guid } ];        $query->{criterias} = [ { key => 'guid', op => 'eq', val => $guid } ];    
711        
712        # if operator is different (dispatcher for 'getListFiltered')
713        } elsif (my $op = $query->{options}->{op}) {
714          $type = 'TRANSPARENT';
715          $query->{criterias} = [ { key => $query->{options}->{meta_label}, op => $op, val => $query->{options}->{meta_value} } ];    
716    
717      }      }
718        
719      # HACK: special case: querying by id does not translate into a common tangram query      # HACK: special case: querying by id does not translate into a common tangram query
# Line 604  sub sendQuery { Line 731  sub sendQuery {
731    if ($type eq 'ITEM' && $ident) {    if ($type eq 'ITEM' && $ident) {
732    
733      if ($mode eq 'OID') {          if ($mode eq 'OID') {    
734          # TODO: review this case!
735        $result = $self->getObject($ident, $query->{options});        $result = $self->getObject($ident, $query->{options});
736            
737      } elsif ($mode eq 'SPECIAL.SYNC') {      } elsif ($mode eq 'SPECIAL.SYNC') {
# Line 635  sub sendQuery { Line 763  sub sendQuery {
763        
764    } elsif ($type eq 'TRANSPARENT') {    } elsif ($type eq 'TRANSPARENT') {
765    
766      if ($action eq 'load') {      if ($crud eq 'RETRIEVE') {
767    
768        my $list = $self->getListFiltered($query->{node}, $query->{criterias});        my $list = $self->getListFiltered($query->{node}, $query->{criterias}, $query->{sorting});
769          #return $list;
770          return $self->createResult($list);
771          
772        #return $self->createSet($object);        #return $self->createSet($object);
773        #return $self->createSet($list);        #return $self->createSet($list);
774        return $self->createSet(@$list);        return $self->createSet(@$list);
# Line 662  sub sendQuery { Line 793  sub sendQuery {
793        #my $res = $self->{COREHANDLE}->select($h, $h->{);        #my $res = $self->{COREHANDLE}->select($h, $h->{);
794        $result = $self->createCursor($query->{node});        $result = $self->createCursor($query->{node});
795    
796      } elsif ($action eq 'save') {      } elsif ($crud eq 'UPDATE') {
797    
798        # 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) ...
799        my $childquery = deep_copy($query);        my $childquery = deep_copy($query);
800        $childquery->{options}->{action} = 'load';        $childquery->{options}->{crud} = 'RETRIEVE';
801        delete $childquery->{payload};        delete $childquery->{payload};
802    
803        # ... to use it to fetch fresh object using ourselves (sendQuery).        # ... to use it to fetch a fresh object using ourselves (sendQuery).
804        my $cursor = $self->sendQuery($childquery);        my $cursor = $self->sendQuery($childquery);
805        my $status = $cursor->getStatus();        my $status = $cursor->getStatus();
806        my $object = $cursor->getNextEntry();        my $object = $cursor->getNextEntry();
# Line 681  sub sendQuery { Line 812  sub sendQuery {
812        # Execute update operation at orm.        # Execute update operation at orm.
813        $self->update($object);        $self->update($object);
814            
815        } elsif ($crud eq 'DELETE') {
816    
817          # Patch current query to be a loader (e.g. change action) ...
818          my $childquery = deep_copy($query);
819          $childquery->{options}->{crud} = 'RETRIEVE';
820    
821          # ... to use it to fetch a fresh object using ourselves (sendQuery).
822          my $cursor = $self->sendQuery($childquery);
823          my $status = $cursor->getStatus();
824          my $object = $cursor->getNextEntry();
825    
826          $self->erase($object);
827    
828        } elsif ($crud eq 'CREATE') {
829          
830          my $nodename = $query->{node};      
831          my $newnode = $self->createNode($nodename);
832          my $id = $self->{_COREHANDLE}->insert($newnode);
833      
834          print "Saved new node $nodename with GUID $newnode->{guid}, OID '$id': " . Dumper($newnode) . "\n";
835          
836          return $newnode;
837    
838      }      }
839    
840    }    }
# Line 835  sub disconnect2 { Line 989  sub disconnect2 {
989    $self->{dataStorageLayer}->disconnect();    $self->{dataStorageLayer}->disconnect();
990  }  }
991    
992    
993    sub createNode {
994      my $self = shift;
995      my $classname = shift;
996    
997      my $obj = $classname->new();
998      
999      my $attr_options = Class::Tangram::attribute_options($classname);
1000      #print "Attribute Options: " . Dumper($attr_options);
1001    
1002      my $attr_types = Class::Tangram::attribute_types($classname);
1003      #print "Attribute Types: " . Dumper($attr_types);
1004      
1005      foreach(keys %{$attr_types}) {
1006        if($attr_types->{$_} eq 'string') {
1007          $obj->{$_} = '';
1008        } elsif($attr_types->{$_} eq 'int') {
1009          $obj->{$_} = 0;
1010        } elsif($attr_types->{$_} eq 'real') {
1011          $obj->{$_} = 0;
1012        } elsif($attr_types->{$_} eq 'rawdatetime') {
1013          $obj->{$_} = '0000-00-00 00:00:00';
1014        } elsif($attr_types->{$_} eq 'ref') {
1015          if($attr_options->{$_}->{class}) {
1016            $obj->{$_} = $self->createNode($attr_options->{$_}->{class});
1017          } else {
1018            #$obj->{$_} = undef();
1019          }
1020        } elsif($attr_types->{$_} eq 'iarray') {
1021            $obj->{$_} = [ ];
1022        } elsif($attr_types->{$_} eq 'hash') {
1023            $obj->{$_} = {  };
1024        } elsif($attr_types->{$_} eq 'flat_hash') {
1025            $obj->{$_} = { };
1026        }
1027      }
1028      
1029      #print "New Object: " . Dumper($obj);
1030      
1031      return $obj;
1032    }
1033    
1034    
1035      sub insertChildNode {
1036        my $self = shift;
1037        my $child_entry = shift;
1038        my $query_args = shift;
1039        
1040        my $core = $self->{_COREHANDLE};
1041        my $nodename = $query_args->{nodename};
1042        
1043        # get parent object
1044        my $query = {
1045              node => $query_args->{parent}->{nodename},
1046              options => { GUID => $query_args->{parent}->{guid}, },
1047              };
1048        my $cursor = $self->sendQuery($query);
1049        my $parent = $cursor->getNextEntry();
1050    
1051        # debug
1052        #print "Parent_org: " . Dumper($parent);
1053            
1054        # Create child node object if isn't already done
1055        # ($child_entry have to be the class name then...)
1056        if(!ref($child_entry)) {
1057          $child_entry = $self->createNode($child_entry);
1058          # it could be insert 'manually' or will be insert 'transparent' if parent will be updated
1059          #$core->insert($child_entry);
1060          #print "Create child object [$nodename]: " . Dumper($child_entry);
1061        }
1062    
1063        # get reference of tied node (seems, only on Linux node's are tied!!)
1064        my $tied_node = tied $parent->{$nodename};
1065    
1066        # insert/change child entry at parent
1067        #print "reference: " . ref($parent->{$nodename}) . "\n";
1068        if(ref($parent->{$nodename}) eq 'ARRAY') {
1069          # (seems, only on Linux node's are tied!!)
1070          if($tied_node) {
1071            # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type,
1072            # so a 'PUSH' is not implemented (which could be then done transparently)
1073            my $array = $tied_node->FETCH;
1074            push @$array, $child_entry;
1075            $tied_node->STORE($array);
1076            # node will be normaly untied at 'STORE'
1077            if(tied $parent->{$nodename}) { print "already tied !!\n"; }
1078            else { undef $tied_node; }
1079          } else {
1080            push @{$parent->{$nodename}}, $child_entry;
1081          }
1082        }
1083        elsif(ref($parent->{$nodename}) eq 'HASH') {
1084          if(my $key = $query_args->{hash_key}) {
1085            # (seems, only on Linux node's are tied!!)
1086            if($tied_node) {
1087              # same problem as with 'ARRAY':
1088              # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type.
1089              my $hash = $tied_node->FETCH;
1090              $hash->{$key} = $child_entry;
1091              $tied_node->STORE($hash);
1092              # node will be normaly untied at 'STORE'
1093              if(tied $parent->{$nodename}) { print "already tied !!\n"; }
1094              else { undef $tied_node; }
1095            } else {
1096              $parent->{$nodename}->{$key} = $child_entry;
1097            }
1098          } else {
1099           print "ERROR: No HASH KEY given, so not able to insert hash entry!";
1100          }
1101        }
1102        else {
1103          $parent->{$nodename} = $child_entry;
1104        }
1105    
1106        # debug
1107        #print "Parent_new: " . Dumper($parent);
1108        
1109        # save parent
1110        $core->update($parent);
1111        
1112        # debug
1113        #print "Saved Parent: ". Dumper($parent);
1114        
1115        return $child_entry;
1116      }
1117    
1118    
1119  1;  1;
1120  __END__  __END__
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