/[cvs]/nfo/perl/libs/Data/Storage/Handler/Tangram.pm
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revision 1.39 by jonen, Fri Jun 6 11:40:40 2003 UTC revision 1.47 by jonen, Tue Aug 31 14:26:08 2004 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.47  2004/08/31 14:26:08  jonen
7    #  updated
8    #
9    #  Revision 1.46  2004/05/06 12:54:34  jonen
10    #  + bugfix related to multiple select-'filter'
11    #
12    #  Revision 1.45  2003/12/14 01:48:36  jonen
13    #  small HACK at _insertChildNode: some special Childnodes should not be created because existing objects have to be selected!
14    #  TODO: make this more generic, e.g. implement a special flag at Schema
15    #
16    #  Revision 1.44  2003/12/04 01:01:50  joko
17    #  + sendQuery now returns result even on crud=UPDATE
18    #
19    #  Revision 1.43  2003/07/02 11:07:12  jonen
20    #  re-activate filtering of results *after* results are fetched from tangram
21    #    (needed for e.g. UserManagment)
22    #
23    #  Revision 1.42  2003/07/01 23:24:17  joko
24    #  now using package before using function
25    #
26    #  Revision 1.41  2003/06/29 02:03:45  joko
27    #  fix:? initialize schema on startup
28    #
29    #  Revision 1.40  2003/06/25 22:57:54  joko
30    #  major rework of "sub sendQuery / sub getListFiltered": now should be capable of "sorting"
31    #
32  #  Revision 1.39  2003/06/06 11:40:40  jonen  #  Revision 1.39  2003/06/06 11:40:40  jonen
33  #  fixed bug at 'getFilteredList'  #  fixed bug at 'getFilteredList'
34  #  #
# Line 160  use base ("Data::Storage::Handler::Abstr Line 186  use base ("Data::Storage::Handler::Abstr
186    
187  use Data::Dumper;  use Data::Dumper;
188  use Tangram;  use Tangram;
189    use Class::Tangram;
190    
191  use DesignPattern::Object;  use DesignPattern::Object;
192  use Data::Storage::Result::Tangram;  use Data::Storage::Result::Tangram;
# Line 169  use Data::Mungle::Transform::Deep qw( ex Line 196  use Data::Mungle::Transform::Deep qw( ex
196  # get logger instance  # get logger instance
197  my $logger = Log::Dispatch::Config->instance;  my $logger = Log::Dispatch::Config->instance;
198    
199    #$Tangram::TRACE = *STDOUT;
200    
201  # this holds the complete instantiated schema from tangram  # this holds the complete instantiated schema from tangram
202  my $schema_tangram;  my $schema_tangram;
# Line 187  sub _initSchema { Line 215  sub _initSchema {
215    #if (!$schema_tangram) {    #if (!$schema_tangram) {
216      #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} } );
217      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} } );
218      $schema_tangram = $obj->getSchema();      $schema_tangram = $obj->getSchema() if $obj;
219    #}    #}
220    if (!$schema_tangram) {    if (!$schema_tangram) {
221      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{locator}->{schema}." );
222      return 0;      return 0;
223    }    }
224    #$self->_patchSchema();    #$self->_patchSchema();
# Line 236  sub connect { Line 264  sub connect {
264  #      return;  #      return;
265  #    }  #    }
266    
267      #return unless $self->_initSchema();      return unless $self->_initSchema();
268      $self->_initSchema();      #$self->_initSchema();
269    
270      # create the main tangram storage object      # create the main tangram storage object
271      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
# Line 499  sub getListFiltered { Line 527  sub getListFiltered {
527    # redirect to unfiltered mode    # redirect to unfiltered mode
528    #return $self->getListUnfiltered(@_);    #return $self->getListUnfiltered(@_);
529    
530    my $nodename = shift;    my $in = {};
531    my $filters = shift;    $in->{nodename} = shift;
532      $in->{filters} = shift;
533      $in->{sorting} = shift;
534      
535    my @results;    my @results;
536    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $in->{nodename} . "' )" );
537    
538  #print Dumper($filters);    #print "Filter_payload: " . Dumper($in->{filters}) . "\n";
539    
540      # 1. "Remote Object Handle" - get set of objects from odbms by object name
541      my $remote = $self->{_COREHANDLE}->remote($in->{nodename});
542      
543      # 2. Transfer $in to $orm_query
544      my $orm_query = {};
545        
546      # 2.a. Filters
547    my @tfilters;    my @tfilters;
548      my $orm_filter = undef;
549        
550    foreach my $filter (@$filters) {    foreach my $filter (@{$in->{filters}}) {
551        
552      # get filter - TODO: for each filter      # get filter - TODO: for each filter
553      #my $filter = $filters->[0];      #my $filter = $filters->[0];
554      
555      # build filter      # 1. The parts of a filter source entry
556      my $lexpr = $filter->{key};      my $lexpr = $filter->{key};
557      #my $op = $filter->{op};      #my $op = $filter->{op};
558      my $op = '=';      my $op = '=';
559      my $rexpr = $filter->{val};      my $rexpr = $filter->{val};
560      my $tight = 100;      my $tight = 100;
561    
562        # 2. Build filter target entry
563            
564    #  my $tfilter = Tangram::Filter->new(      # Test 1 - didn't work out!
565    #    expr => "t1.$lexpr $op '$rexpr'",      #  my $tfilter = Tangram::Filter->new(
566    #    tight => $tight,      #    expr => "t1.$lexpr $op '$rexpr'",
567    #    objects => $objects,      #    tight => $tight,
568    #  );      #    objects => $objects,
569          #  );
570    
571        my $orm_filter_tmp = undef;
572        # was:
573      # TODO: is_op?      # TODO: is_op?
574      # dispatch un-common operators if exists      # dispatch un-common operators if exists
575      if($filter->{op} eq "ref") {      if ($filter->{op} eq "ref") {
576        # do nothing, results will be filtered later cause 'tangram-filter' doesn't support 'ref' query        # do nothing, results will be filtered later cause 'tangram-filter' doesn't support 'ref' query
577        #print "Filter->op eq 'ref'.\n";        #print "Filter->op eq 'ref'.\n";
578        #push @tfilters, 'ref($remote->{' . $filter->{key} . '})' . " eq '$filter->{val}'";        #push @tfilters, 'ref($remote->{' . $filter->{key} . '})' . " eq '$filter->{val}'";
579      } else {      } else {
580        # 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
581        push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";        #push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
582          # better: calculate expression right here!
583          #push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
584          
585          #print "key: ", $filter->{key}, "\n";
586          
587          my $left = $remote->{$filter->{key}};
588          #my $r = Tangram::Expr->new( 'string' => "'" . $filter->{val} . "'" );
589          my $right = $filter->{val};
590          my $op = $filter->{op};
591          $orm_filter_tmp = $left->$op($right);
592      }      }
593    
594    }      if (!ref($orm_filter)) {
595          $orm_filter = $orm_filter_tmp;
596        } else {
597          $orm_filter = $orm_filter->and($orm_filter_tmp);
598        }
599    
600    my $tfilter = join(' & ', @tfilters);    }
601    
602    # get set of objects from odbms by object name    $orm_query->{filter} = $orm_filter;
   my $remote = $self->{_COREHANDLE}->remote($nodename);  
603        
604      # debug point:
605      #print "Filter: " . Dumper($orm_query->{filter}) . "\n";
606    
607    # was:    # was:
608    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);  
609      # 2.b. sorting [new as of 2003-06-17]
610      if ($in->{sorting}) {
611        my $sorting_rules = [];
612        my $sorting_order = 'ASC';
613        foreach my $sorting_column (keys %{$in->{sorting}}) {
614          $sorting_order = $in->{sorting}->{$sorting_column} if $in->{sorting}->{$sorting_column};
615          push @$sorting_rules, Tangram::Expr->new( 'string' => $sorting_column );
616        }
617        $orm_query->{order} = $sorting_rules;
618        if ($sorting_order eq 'DESC') {
619          $orm_query->{desc} = 1;
620        }
621      }
622    
623    
624      # 3. build and issue query - return result as Tangram::Cursor
625      
626      # coerce hash into array (This is valid in Perl)
627      my @orm_query_args = %$orm_query;
628      # send query (arguments) to orm
629      @results = $self->{_COREHANDLE}->select($remote, @orm_query_args);
630      
631      #my $cursor = $self->{_COREHANDLE}->cursor($remote, @orm_query_args);
632      #return $cursor;
633      #print Dumper(@results);
634    
635    # is:    # is:
636    # 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
637    my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';      #my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . $sorting . ');';
638          #print "eval: $evalstring", "\n";
639    #print "eval: $evalstring", "\n";      # get filtered list/set
640          #@results = eval($evalstring);
641    # get filtered list/set      #die $@ if $@;
   @results = eval($evalstring);  
   die $@ if $@;  
     
642    
643    # filter results    # filter results - NEEDED for e.g. UserManagment !!
644    if($filters->[0]->{op} eq "ref") {    if ($in->{filters}->[0]->{op} && ($in->{filters}->[0]->{op} eq "ref")) {
645        #print "Filter->op eq 'ref'.\n";        #print "Filter->op eq 'ref'.\n";
646        my $att_name = $filters->[0]->{key};        my $att_name = $in->{filters}->[0]->{key};
647        my $att_val = $filters->[0]->{val};        my $att_val = $in->{filters}->[0]->{val};
648        my @filtered;        my @filtered;
649        foreach(@results) {        foreach(@results) {
650          if(ref($_->{$att_name}) eq $att_val) {          if(ref($_->{$att_name}) eq $att_val) {
# Line 602  sub createSet { Line 684  sub createSet {
684    return $result;    return $result;
685  }  }
686    
687    sub createResult {
688      my $self = shift;
689      my $rh = shift;
690      my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
691      return $result;
692    }
693    
694  sub sendQuery {  sub sendQuery {
695    my $self = shift;    my $self = shift;
696    my $query = shift;    my $query = shift;
# Line 693  sub sendQuery { Line 782  sub sendQuery {
782    
783      if ($crud eq 'RETRIEVE') {      if ($crud eq 'RETRIEVE') {
784    
785        my $list = $self->getListFiltered($query->{node}, $query->{criterias});        my $list = $self->getListFiltered($query->{node}, $query->{criterias}, $query->{sorting});
786          #return $list;
787          return $self->createResult($list);
788          
789        #return $self->createSet($object);        #return $self->createSet($object);
790        #return $self->createSet($list);        #return $self->createSet($list);
791        return $self->createSet(@$list);        return $self->createSet(@$list);
# Line 734  sub sendQuery { Line 826  sub sendQuery {
826        my $options = { utf8 => 1, php => 1 };        my $options = { utf8 => 1, php => 1 };
827        merge_to($object, $query->{payload}, $options);        merge_to($object, $query->{payload}, $options);
828    
829          #print Dumper($object);
830          
831        # Execute update operation at orm.        # Execute update operation at orm.
832        $self->update($object);        $self->update($object);
833          $result = $self->createResult([ $object ]);
834            
835      } elsif ($crud eq 'DELETE') {      } elsif ($crud eq 'DELETE') {
836    
# Line 749  sub sendQuery { Line 844  sub sendQuery {
844        my $object = $cursor->getNextEntry();        my $object = $cursor->getNextEntry();
845    
846        $self->erase($object);        $self->erase($object);
847          $self->unload($object);
848    
849      } elsif ($crud eq 'CREATE') {      } elsif ($crud eq 'CREATE') {
850                
# Line 938  sub createNode { Line 1034  sub createNode {
1034        $obj->{$_} = '0000-00-00 00:00:00';        $obj->{$_} = '0000-00-00 00:00:00';
1035      } elsif($attr_types->{$_} eq 'ref') {      } elsif($attr_types->{$_} eq 'ref') {
1036        if($attr_options->{$_}->{class}) {        if($attr_options->{$_}->{class}) {
1037          $obj->{$_} = $self->createNode($attr_options->{$_}->{class});          # HACK!!!
1038            # STANDALONE Objects (objects which make sense to instanciat alone) should not created automaticly
1039            # because they maybe exists and should only be SETTED not CREATED!
1040            # TODO: Create a flag at the scheme for that reason!
1041            #   (e.g child_node => 1 for child-nodes only like e.g. UserData)
1042            if($attr_options->{$_}->{class} eq 'NetPerson' || $attr_options->{$_}->{class} eq 'Event' || $attr_options->{$_}->{class} eq 'BetRule') {
1043              #$obj->{$_} = undef();
1044            } else {
1045              $obj->{$_} = $self->createNode($attr_options->{$_}->{class});
1046            }
1047        } else {        } else {
1048          #$obj->{$_} = undef();          #$obj->{$_} = undef();
1049        }        }
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