/[cvs]/nfo/perl/libs/Data/Storage/Handler/Tangram.pm
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revision 1.37 by jonen, Sat May 10 17:37:39 2003 UTC revision 1.46 by jonen, Thu May 6 12:54:34 2004 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.46  2004/05/06 12:54:34  jonen
7    #  + bugfix related to multiple select-'filter'
8    #
9    #  Revision 1.45  2003/12/14 01:48:36  jonen
10    #  small HACK at _insertChildNode: some special Childnodes should not be created because existing objects have to be selected!
11    #  TODO: make this more generic, e.g. implement a special flag at Schema
12    #
13    #  Revision 1.44  2003/12/04 01:01:50  joko
14    #  + sendQuery now returns result even on crud=UPDATE
15    #
16    #  Revision 1.43  2003/07/02 11:07:12  jonen
17    #  re-activate filtering of results *after* results are fetched from tangram
18    #    (needed for e.g. UserManagment)
19    #
20    #  Revision 1.42  2003/07/01 23:24:17  joko
21    #  now using package before using function
22    #
23    #  Revision 1.41  2003/06/29 02:03:45  joko
24    #  fix:? initialize schema on startup
25    #
26    #  Revision 1.40  2003/06/25 22:57:54  joko
27    #  major rework of "sub sendQuery / sub getListFiltered": now should be capable of "sorting"
28    #
29    #  Revision 1.39  2003/06/06 11:40:40  jonen
30    #  fixed bug at 'getFilteredList'
31    #
32    #  Revision 1.38  2003/05/13 16:38:38  joko
33    #  problems with "tied" on 5.6.1/win32
34    #
35  #  Revision 1.37  2003/05/10 17:37:39  jonen  #  Revision 1.37  2003/05/10 17:37:39  jonen
36  #  corrected last commit  #  corrected last commit
37  #  #
# Line 154  use base ("Data::Storage::Handler::Abstr Line 183  use base ("Data::Storage::Handler::Abstr
183    
184  use Data::Dumper;  use Data::Dumper;
185  use Tangram;  use Tangram;
186    use Class::Tangram;
187    
188  use DesignPattern::Object;  use DesignPattern::Object;
189  use Data::Storage::Result::Tangram;  use Data::Storage::Result::Tangram;
# Line 163  use Data::Mungle::Transform::Deep qw( ex Line 193  use Data::Mungle::Transform::Deep qw( ex
193  # get logger instance  # get logger instance
194  my $logger = Log::Dispatch::Config->instance;  my $logger = Log::Dispatch::Config->instance;
195    
196    #$Tangram::TRACE = *STDOUT;
197    
198  # this holds the complete instantiated schema from tangram  # this holds the complete instantiated schema from tangram
199  my $schema_tangram;  my $schema_tangram;
# Line 181  sub _initSchema { Line 212  sub _initSchema {
212    #if (!$schema_tangram) {    #if (!$schema_tangram) {
213      #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} } );
214      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} } );
215      $schema_tangram = $obj->getSchema();      $schema_tangram = $obj->getSchema() if $obj;
216    #}    #}
217    if (!$schema_tangram) {    if (!$schema_tangram) {
218      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{locator}->{schema}." );
219      return 0;      return 0;
220    }    }
221    #$self->_patchSchema();    #$self->_patchSchema();
# Line 230  sub connect { Line 261  sub connect {
261  #      return;  #      return;
262  #    }  #    }
263    
264      #return unless $self->_initSchema();      return unless $self->_initSchema();
265      $self->_initSchema();      #$self->_initSchema();
266    
267      # create the main tangram storage object      # create the main tangram storage object
268      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
# Line 493  sub getListFiltered { Line 524  sub getListFiltered {
524    # redirect to unfiltered mode    # redirect to unfiltered mode
525    #return $self->getListUnfiltered(@_);    #return $self->getListUnfiltered(@_);
526    
527    my $nodename = shift;    my $in = {};
528    my $filters = shift;    $in->{nodename} = shift;
529      $in->{filters} = shift;
530      $in->{sorting} = shift;
531      
532    my @results;    my @results;
533    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $in->{nodename} . "' )" );
534    
535      #print "Filter_payload: " . Dumper($in->{filters}) . "\n";
536    
537  #print Dumper($filters);    # 1. "Remote Object Handle" - get set of objects from odbms by object name
538      my $remote = $self->{_COREHANDLE}->remote($in->{nodename});
539      
540      # 2. Transfer $in to $orm_query
541      my $orm_query = {};
542        
543      # 2.a. Filters
544    my @tfilters;    my @tfilters;
545      my $orm_filter = undef;
546        
547    foreach my $filter (@$filters) {    foreach my $filter (@{$in->{filters}}) {
548        
549      # get filter - TODO: for each filter      # get filter - TODO: for each filter
550      #my $filter = $filters->[0];      #my $filter = $filters->[0];
551      
552      # build filter      # 1. The parts of a filter source entry
553      my $lexpr = $filter->{key};      my $lexpr = $filter->{key};
554      #my $op = $filter->{op};      #my $op = $filter->{op};
555      my $op = '=';      my $op = '=';
556      my $rexpr = $filter->{val};      my $rexpr = $filter->{val};
557      my $tight = 100;      my $tight = 100;
558    
559        # 2. Build filter target entry
560            
561    #  my $tfilter = Tangram::Filter->new(      # Test 1 - didn't work out!
562    #    expr => "t1.$lexpr $op '$rexpr'",      #  my $tfilter = Tangram::Filter->new(
563    #    tight => $tight,      #    expr => "t1.$lexpr $op '$rexpr'",
564    #    objects => $objects,      #    tight => $tight,
565    #  );      #    objects => $objects,
566          #  );
567    
568        my $orm_filter_tmp = undef;
569        # was:
570      # TODO: is_op?      # TODO: is_op?
571      # dispatch un-common operators if exists      # dispatch un-common operators if exists
572      if($filter->{op} eq "ref") {      if ($filter->{op} eq "ref") {
573        push @tfilters, 'ref($remote->{' . $filter->{key} . '})' . " eq '$filter->{val}'";        # do nothing, results will be filtered later cause 'tangram-filter' doesn't support 'ref' query
574          #print "Filter->op eq 'ref'.\n";
575          #push @tfilters, 'ref($remote->{' . $filter->{key} . '})' . " eq '$filter->{val}'";
576      } else {      } else {
577        # 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
578        push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";        #push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
579          # better: calculate expression right here!
580          #push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
581          
582          #print "key: ", $filter->{key}, "\n";
583          
584          my $left = $remote->{$filter->{key}};
585          #my $r = Tangram::Expr->new( 'string' => "'" . $filter->{val} . "'" );
586          my $right = $filter->{val};
587          my $op = $filter->{op};
588          $orm_filter_tmp = $left->$op($right);
589      }      }
590    
591    }      if (!ref($orm_filter)) {
592          $orm_filter = $orm_filter_tmp;
593        } else {
594          $orm_filter = $orm_filter->and($orm_filter_tmp);
595        }
596    
597    my $tfilter = join(' & ', @tfilters);    }
598    
599    # get set of objects from odbms by object name    $orm_query->{filter} = $orm_filter;
   my $remote = $self->{_COREHANDLE}->remote($nodename);  
600        
601      # debug point:
602      #print "Filter: " . Dumper($orm_query->{filter}) . "\n";
603    
604    # was:    # was:
605    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);  
606      # 2.b. sorting [new as of 2003-06-17]
607      if ($in->{sorting}) {
608        my $sorting_rules = [];
609        my $sorting_order = 'ASC';
610        foreach my $sorting_column (keys %{$in->{sorting}}) {
611          $sorting_order = $in->{sorting}->{$sorting_column} if $in->{sorting}->{$sorting_column};
612          push @$sorting_rules, Tangram::Expr->new( 'string' => $sorting_column );
613        }
614        $orm_query->{order} = $sorting_rules;
615        if ($sorting_order eq 'DESC') {
616          $orm_query->{desc} = 1;
617        }
618      }
619    
620    
621      # 3. build and issue query - return result as Tangram::Cursor
622      
623      # coerce hash into array (This is valid in Perl)
624      my @orm_query_args = %$orm_query;
625      # send query (arguments) to orm
626      @results = $self->{_COREHANDLE}->select($remote, @orm_query_args);
627      
628      #my $cursor = $self->{_COREHANDLE}->cursor($remote, @orm_query_args);
629      #return $cursor;
630      #print Dumper(@results);
631    
632    # is:    # is:
633    # 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
634    my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';      #my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . $sorting . ');';
635          #print "eval: $evalstring", "\n";
636    #print "eval: $evalstring", "\n";      # get filtered list/set
637          #@results = eval($evalstring);
638    # get filtered list/set      #die $@ if $@;
639    @results = eval($evalstring);  
640    die $@ if $@;    # filter results - NEEDED for e.g. UserManagment !!
641      if ($in->{filters}->[0]->{op} && ($in->{filters}->[0]->{op} eq "ref")) {
642          #print "Filter->op eq 'ref'.\n";
643          my $att_name = $in->{filters}->[0]->{key};
644          my $att_val = $in->{filters}->[0]->{val};
645          my @filtered;
646          foreach(@results) {
647            if(ref($_->{$att_name}) eq $att_val) {
648              push @filtered, $_;
649            }
650          }
651          @results = @filtered;
652      }
653    
654      #print "results: " . Dumper(\@results);
655        
656    return \@results;    return \@results;
657  }  }
# Line 577  sub createSet { Line 681  sub createSet {
681    return $result;    return $result;
682  }  }
683    
684    sub createResult {
685      my $self = shift;
686      my $rh = shift;
687      my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
688      return $result;
689    }
690    
691  sub sendQuery {  sub sendQuery {
692    my $self = shift;    my $self = shift;
693    my $query = shift;    my $query = shift;
# Line 668  sub sendQuery { Line 779  sub sendQuery {
779    
780      if ($crud eq 'RETRIEVE') {      if ($crud eq 'RETRIEVE') {
781    
782        my $list = $self->getListFiltered($query->{node}, $query->{criterias});        my $list = $self->getListFiltered($query->{node}, $query->{criterias}, $query->{sorting});
783          #return $list;
784          return $self->createResult($list);
785          
786        #return $self->createSet($object);        #return $self->createSet($object);
787        #return $self->createSet($list);        #return $self->createSet($list);
788        return $self->createSet(@$list);        return $self->createSet(@$list);
# Line 709  sub sendQuery { Line 823  sub sendQuery {
823        my $options = { utf8 => 1, php => 1 };        my $options = { utf8 => 1, php => 1 };
824        merge_to($object, $query->{payload}, $options);        merge_to($object, $query->{payload}, $options);
825    
826          #print Dumper($object);
827          
828        # Execute update operation at orm.        # Execute update operation at orm.
829        $self->update($object);        $self->update($object);
830          $result = $self->createResult([ $object ]);
831            
832      } elsif ($crud eq 'DELETE') {      } elsif ($crud eq 'DELETE') {
833    
# Line 724  sub sendQuery { Line 841  sub sendQuery {
841        my $object = $cursor->getNextEntry();        my $object = $cursor->getNextEntry();
842    
843        $self->erase($object);        $self->erase($object);
844          $self->unload($object);
845    
846      } elsif ($crud eq 'CREATE') {      } elsif ($crud eq 'CREATE') {
847                
# Line 913  sub createNode { Line 1031  sub createNode {
1031        $obj->{$_} = '0000-00-00 00:00:00';        $obj->{$_} = '0000-00-00 00:00:00';
1032      } elsif($attr_types->{$_} eq 'ref') {      } elsif($attr_types->{$_} eq 'ref') {
1033        if($attr_options->{$_}->{class}) {        if($attr_options->{$_}->{class}) {
1034          $obj->{$_} = $self->createNode($attr_options->{$_}->{class});          # HACK!!!
1035            # STANDALONE Objects (objects which make sense to instanciat alone) should not created automaticly
1036            # because they maybe exists and should only be SETTED not CREATED!
1037            # TODO: Create a flag at the scheme for that reason!
1038            #   (e.g child_node => 1 for child-nodes only like e.g. UserData)
1039            if($attr_options->{$_}->{class} eq 'NetPerson' || $attr_options->{$_}->{class} eq 'Event') {
1040              #$obj->{$_} = undef();
1041            } else {
1042              $obj->{$_} = $self->createNode($attr_options->{$_}->{class});
1043            }
1044        } else {        } else {
1045          #$obj->{$_} = undef();          #$obj->{$_} = undef();
1046        }        }
# Line 960  sub createNode { Line 1087  sub createNode {
1087        #print "Create child object [$nodename]: " . Dumper($child_entry);        #print "Create child object [$nodename]: " . Dumper($child_entry);
1088      }      }
1089    
1090      # get reference of tied node      # get reference of tied node (seems, only on Linux node's are tied!!)
1091      my $tied_node = tied $parent->{$nodename};      my $tied_node = tied $parent->{$nodename};
1092    
1093      # insert/change child entry at parent      # insert/change child entry at parent
1094      #print "reference: " . ref($parent->{$nodename}) . "\n";      #print "reference: " . ref($parent->{$nodename}) . "\n";
1095      if(ref($parent->{$nodename}) eq 'ARRAY') {      if(ref($parent->{$nodename}) eq 'ARRAY') {
1096        # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type,        # (seems, only on Linux node's are tied!!)
1097        # so a 'PUSH' is not implemented (which could be then done transparently)        if($tied_node) {
1098        my $array = $tied_node->FETCH;          # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type,
1099        push @$array, $child_entry;          # so a 'PUSH' is not implemented (which could be then done transparently)
1100        $tied_node->STORE($array);          my $array = $tied_node->FETCH;
1101        # node will be normaly untied at 'STORE'          push @$array, $child_entry;
1102        if(tied $parent->{$nodename}) { print "already tied !!\n"; }          $tied_node->STORE($array);
       else { undef $tied_node; }  
     }  
     elsif(ref($parent->{$nodename}) eq 'HASH') {  
       if(my $key = $query_args->{hash_key}) {  
         # same problem as with 'ARRAY':  
         # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type.  
         my $hash = $tied_node->FETCH;  
         $hash->{$key} = $child_entry;  
         $tied_node->STORE($hash);  
1103          # node will be normaly untied at 'STORE'          # node will be normaly untied at 'STORE'
1104          if(tied $parent->{$nodename}) { print "already tied !!\n"; }          if(tied $parent->{$nodename}) { print "already tied !!\n"; }
1105          else { undef $tied_node; }          else { undef $tied_node; }
1106        } else {        } else {
1107            push @{$parent->{$nodename}}, $child_entry;
1108          }
1109        }
1110        elsif(ref($parent->{$nodename}) eq 'HASH') {
1111          if(my $key = $query_args->{hash_key}) {
1112            # (seems, only on Linux node's are tied!!)
1113            if($tied_node) {
1114              # same problem as with 'ARRAY':
1115              # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type.
1116              my $hash = $tied_node->FETCH;
1117              $hash->{$key} = $child_entry;
1118              $tied_node->STORE($hash);
1119              # node will be normaly untied at 'STORE'
1120              if(tied $parent->{$nodename}) { print "already tied !!\n"; }
1121              else { undef $tied_node; }
1122            } else {
1123              $parent->{$nodename}->{$key} = $child_entry;
1124            }
1125          } else {
1126         print "ERROR: No HASH KEY given, so not able to insert hash entry!";         print "ERROR: No HASH KEY given, so not able to insert hash entry!";
1127        }        }
1128      }      }
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