/[cvs]/nfo/perl/libs/Data/Storage/Handler/Tangram.pm
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revision 1.38 by joko, Tue May 13 16:38:38 2003 UTC revision 1.48 by jonen, Thu Oct 28 11:35:51 2004 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.48  2004/10/28 11:35:51  jonen
7    #  + bugfix related to select-criterias(filter)
8    #
9    #  Revision 1.47  2004/08/31 14:26:08  jonen
10    #  updated
11    #
12    #  Revision 1.46  2004/05/06 12:54:34  jonen
13    #  + bugfix related to multiple select-'filter'
14    #
15    #  Revision 1.45  2003/12/14 01:48:36  jonen
16    #  small HACK at _insertChildNode: some special Childnodes should not be created because existing objects have to be selected!
17    #  TODO: make this more generic, e.g. implement a special flag at Schema
18    #
19    #  Revision 1.44  2003/12/04 01:01:50  joko
20    #  + sendQuery now returns result even on crud=UPDATE
21    #
22    #  Revision 1.43  2003/07/02 11:07:12  jonen
23    #  re-activate filtering of results *after* results are fetched from tangram
24    #    (needed for e.g. UserManagment)
25    #
26    #  Revision 1.42  2003/07/01 23:24:17  joko
27    #  now using package before using function
28    #
29    #  Revision 1.41  2003/06/29 02:03:45  joko
30    #  fix:? initialize schema on startup
31    #
32    #  Revision 1.40  2003/06/25 22:57:54  joko
33    #  major rework of "sub sendQuery / sub getListFiltered": now should be capable of "sorting"
34    #
35    #  Revision 1.39  2003/06/06 11:40:40  jonen
36    #  fixed bug at 'getFilteredList'
37    #
38  #  Revision 1.38  2003/05/13 16:38:38  joko  #  Revision 1.38  2003/05/13 16:38:38  joko
39  #  problems with "tied" on 5.6.1/win32  #  problems with "tied" on 5.6.1/win32
40  #  #
# Line 157  use base ("Data::Storage::Handler::Abstr Line 189  use base ("Data::Storage::Handler::Abstr
189    
190  use Data::Dumper;  use Data::Dumper;
191  use Tangram;  use Tangram;
192    use Class::Tangram;
193    
194  use DesignPattern::Object;  use DesignPattern::Object;
195  use Data::Storage::Result::Tangram;  use Data::Storage::Result::Tangram;
# Line 166  use Data::Mungle::Transform::Deep qw( ex Line 199  use Data::Mungle::Transform::Deep qw( ex
199  # get logger instance  # get logger instance
200  my $logger = Log::Dispatch::Config->instance;  my $logger = Log::Dispatch::Config->instance;
201    
202    #$Tangram::TRACE = *STDOUT;
203    
204  # this holds the complete instantiated schema from tangram  # this holds the complete instantiated schema from tangram
205  my $schema_tangram;  my $schema_tangram;
# Line 184  sub _initSchema { Line 218  sub _initSchema {
218    #if (!$schema_tangram) {    #if (!$schema_tangram) {
219      #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} } );
220      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} } );
221      $schema_tangram = $obj->getSchema();      $schema_tangram = $obj->getSchema() if $obj;
222    #}    #}
223    if (!$schema_tangram) {    if (!$schema_tangram) {
224      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{locator}->{schema}." );
225      return 0;      return 0;
226    }    }
227    #$self->_patchSchema();    #$self->_patchSchema();
# Line 233  sub connect { Line 267  sub connect {
267  #      return;  #      return;
268  #    }  #    }
269    
270      #return unless $self->_initSchema();      return unless $self->_initSchema();
271      $self->_initSchema();      #$self->_initSchema();
272    
273      # create the main tangram storage object      # create the main tangram storage object
274      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
# Line 496  sub getListFiltered { Line 530  sub getListFiltered {
530    # redirect to unfiltered mode    # redirect to unfiltered mode
531    #return $self->getListUnfiltered(@_);    #return $self->getListUnfiltered(@_);
532    
533    my $nodename = shift;    my $in = {};
534    my $filters = shift;    $in->{nodename} = shift;
535      $in->{filters} = shift;
536      $in->{sorting} = shift;
537      
538    my @results;    my @results;
539    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $in->{nodename} . "' )" );
540    
541      #print "Filter_payload: " . Dumper($in->{filters}) . "\n";
542    
543  #print Dumper($filters);    # 1. "Remote Object Handle" - get set of objects from odbms by object name
544      my $remote = $self->{_COREHANDLE}->remote($in->{nodename});
545        
546      # 2. Transfer $in to $orm_query
547      my $orm_query = {};
548      
549      # 2.a. Filters
550    my @tfilters;    my @tfilters;
551      my $orm_filter = undef;
552        
553    foreach my $filter (@$filters) {    foreach my $filter (@{$in->{filters}}) {
554        
555      # get filter - TODO: for each filter      # get filter - TODO: for each filter
556      #my $filter = $filters->[0];      #my $filter = $filters->[0];
557      
558      # build filter      # 1. The parts of a filter source entry
559      my $lexpr = $filter->{key};      my $lexpr = $filter->{key};
560      #my $op = $filter->{op};      #my $op = $filter->{op};
561      my $op = '=';      my $op = '=';
562      my $rexpr = $filter->{val};      my $rexpr = $filter->{val};
563      my $tight = 100;      my $tight = 100;
564    
565        # 2. Build filter target entry
566            
567    #  my $tfilter = Tangram::Filter->new(      # Test 1 - didn't work out!
568    #    expr => "t1.$lexpr $op '$rexpr'",      #  my $tfilter = Tangram::Filter->new(
569    #    tight => $tight,      #    expr => "t1.$lexpr $op '$rexpr'",
570    #    objects => $objects,      #    tight => $tight,
571    #  );      #    objects => $objects,
572          #  );
573    
574        my $orm_filter_tmp = undef;
575        # was:
576      # TODO: is_op?      # TODO: is_op?
577      # dispatch un-common operators if exists      # dispatch un-common operators if exists
578      if($filter->{op} eq "ref") {      if ($filter->{op} eq "ref") {
579        push @tfilters, 'ref($remote->{' . $filter->{key} . '})' . " eq '$filter->{val}'";        # do nothing, results will be filtered later cause 'tangram-filter' doesn't support 'ref' query
580          #print "Filter->op eq 'ref'.\n";
581          #push @tfilters, 'ref($remote->{' . $filter->{key} . '})' . " eq '$filter->{val}'";
582      } else {      } else {
583        # 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
584        push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";        #push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
585          # better: calculate expression right here!
586          #push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
587          
588          #print "key: ", $filter->{key}, "\n";
589          
590          my $left = $remote->{$filter->{key}};
591          #my $r = Tangram::Expr->new( 'string' => "'" . $filter->{val} . "'" );
592          my $right = $filter->{val};
593          my $op = $filter->{op};
594          $orm_filter_tmp = $left->$op($right);
595      }      }
596    
597    }      if (!ref($orm_filter)) {
598          $orm_filter = $orm_filter_tmp;
599        } else {
600          $orm_filter = $orm_filter->and($orm_filter_tmp);
601        }
602    
603    my $tfilter = join(' & ', @tfilters);    }
604    
605    # get set of objects from odbms by object name    $orm_query->{filter} = $orm_filter;
   my $remote = $self->{_COREHANDLE}->remote($nodename);  
606        
607      # debug point:
608      #print "Filter: " . Dumper($orm_query->{filter}) . "\n";
609    
610    # was:    # was:
611    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);  
612      # 2.b. sorting [new as of 2003-06-17]
613      if ($in->{sorting}) {
614        my $sorting_rules = [];
615        my $sorting_order = 'ASC';
616        foreach my $sorting_column (keys %{$in->{sorting}}) {
617          $sorting_order = $in->{sorting}->{$sorting_column} if $in->{sorting}->{$sorting_column};
618          push @$sorting_rules, Tangram::Expr->new( 'string' => $sorting_column );
619        }
620        $orm_query->{order} = $sorting_rules;
621        if ($sorting_order eq 'DESC') {
622          $orm_query->{desc} = 1;
623        }
624      }
625    
626    
627      # 3. build and issue query - return result as Tangram::Cursor
628      
629      # coerce hash into array (This is valid in Perl)
630      my @orm_query_args = %$orm_query;
631      # send query (arguments) to orm
632      @results = $self->{_COREHANDLE}->select($remote, @orm_query_args);
633      
634      #my $cursor = $self->{_COREHANDLE}->cursor($remote, @orm_query_args);
635      #return $cursor;
636      #print Dumper(@results);
637    
638    # is:    # is:
639    # 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
640    my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';      #my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . $sorting . ');';
641          #print "eval: $evalstring", "\n";
642    #print "eval: $evalstring", "\n";      # get filtered list/set
643          #@results = eval($evalstring);
644    # get filtered list/set      #die $@ if $@;
645    @results = eval($evalstring);  
646    die $@ if $@;    # filter results - NEEDED for e.g. UserManagment !!
647      if ($in->{filters}->[0]->{op} && ($in->{filters}->[0]->{op} eq "ref")) {
648          #print "Filter->op eq 'ref'.\n";
649          my $att_name = $in->{filters}->[0]->{key};
650          my $att_val = $in->{filters}->[0]->{val};
651          my @filtered;
652          foreach(@results) {
653            if(ref($_->{$att_name}) eq $att_val) {
654              push @filtered, $_;
655            }
656          }
657          @results = @filtered;
658      }
659    
660      #print "results: " . Dumper(\@results);
661        
662    return \@results;    return \@results;
663  }  }
# Line 580  sub createSet { Line 687  sub createSet {
687    return $result;    return $result;
688  }  }
689    
690    sub createResult {
691      my $self = shift;
692      my $rh = shift;
693      my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
694      return $result;
695    }
696    
697  sub sendQuery {  sub sendQuery {
698    my $self = shift;    my $self = shift;
699    my $query = shift;    my $query = shift;
# Line 613  sub sendQuery { Line 727  sub sendQuery {
727            
728      } elsif (my $guid = $query->{options}->{GUID}) {      } elsif (my $guid = $query->{options}->{GUID}) {
729        $type = 'TRANSPARENT';        $type = 'TRANSPARENT';
730        $query->{criterias} = [ { key => 'guid', op => 'eq', val => $guid } ];            if(ref($query->{criterias}) eq 'ARRAY') {
731            push @{$query->{criterias}}, { key => 'guid', op => 'eq', val => $guid };
732          } else {
733            $query->{criterias} = [ { key => 'guid', op => 'eq', val => $guid } ];
734          }
735        }
736      # if operator is different (dispatcher for 'getListFiltered')      # if operator is different (dispatcher for 'getListFiltered')
737      } elsif (my $op = $query->{options}->{op}) {      if (my $op = $query->{options}->{op}) {
738        $type = 'TRANSPARENT';        $type = 'TRANSPARENT';
739        $query->{criterias} = [ { key => $query->{options}->{meta_label}, op => $op, val => $query->{options}->{meta_value} } ];            if(ref($query->{criterias}) eq 'ARRAY') {
740            push @{$query->{criterias}}, { key => $query->{options}->{meta_label}, op => $op, val => $query->{options}->{meta_value} };
741          } else {
742            $query->{criterias} = [ { key => $query->{options}->{meta_label}, op => $op, val => $query->{options}->{meta_value} } ];    
743          }
744      }      }
745        
746      # HACK: special case: querying by id does not translate into a common tangram query      # HACK: special case: querying by id does not translate into a common tangram query
# Line 671  sub sendQuery { Line 792  sub sendQuery {
792    
793      if ($crud eq 'RETRIEVE') {      if ($crud eq 'RETRIEVE') {
794    
795        my $list = $self->getListFiltered($query->{node}, $query->{criterias});        my $list = $self->getListFiltered($query->{node}, $query->{criterias}, $query->{sorting});
796          #return $list;
797          return $self->createResult($list);
798          
799        #return $self->createSet($object);        #return $self->createSet($object);
800        #return $self->createSet($list);        #return $self->createSet($list);
801        return $self->createSet(@$list);        return $self->createSet(@$list);
# Line 712  sub sendQuery { Line 836  sub sendQuery {
836        my $options = { utf8 => 1, php => 1 };        my $options = { utf8 => 1, php => 1 };
837        merge_to($object, $query->{payload}, $options);        merge_to($object, $query->{payload}, $options);
838    
839          #print Dumper($object);
840          
841        # Execute update operation at orm.        # Execute update operation at orm.
842        $self->update($object);        $self->update($object);
843          $result = $self->createResult([ $object ]);
844            
845      } elsif ($crud eq 'DELETE') {      } elsif ($crud eq 'DELETE') {
846    
# Line 727  sub sendQuery { Line 854  sub sendQuery {
854        my $object = $cursor->getNextEntry();        my $object = $cursor->getNextEntry();
855    
856        $self->erase($object);        $self->erase($object);
857          $self->unload($object);
858    
859      } elsif ($crud eq 'CREATE') {      } elsif ($crud eq 'CREATE') {
860                
# Line 916  sub createNode { Line 1044  sub createNode {
1044        $obj->{$_} = '0000-00-00 00:00:00';        $obj->{$_} = '0000-00-00 00:00:00';
1045      } elsif($attr_types->{$_} eq 'ref') {      } elsif($attr_types->{$_} eq 'ref') {
1046        if($attr_options->{$_}->{class}) {        if($attr_options->{$_}->{class}) {
1047          $obj->{$_} = $self->createNode($attr_options->{$_}->{class});          # HACK!!!
1048            # STANDALONE Objects (objects which make sense to instanciat alone) should not created automaticly
1049            # because they maybe exists and should only be SETTED not CREATED!
1050            # TODO: Create a flag at the scheme for that reason!
1051            #   (e.g child_node => 1 for child-nodes only like e.g. UserData)
1052            if($attr_options->{$_}->{class} eq 'NetPerson' || $attr_options->{$_}->{class} eq 'Event' || $attr_options->{$_}->{class} eq 'BetRule') {
1053              #$obj->{$_} = undef();
1054            } else {
1055              $obj->{$_} = $self->createNode($attr_options->{$_}->{class});
1056            }
1057        } else {        } else {
1058          #$obj->{$_} = undef();          #$obj->{$_} = undef();
1059        }        }
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