/[cvs]/nfo/perl/libs/Data/Storage/Handler/Tangram.pm
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revision 1.14 by jonen, Thu Dec 5 09:40:30 2002 UTC revision 1.25 by joko, Sun Jan 19 02:30:05 2003 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.25  2003/01/19 02:30:05  joko
7    #  + fix: modified call to '_initSchema'
8    #
9    #  Revision 1.24  2002/12/22 14:13:01  joko
10    #  + sub dropDb
11    #
12    #  Revision 1.23  2002/12/19 16:31:53  joko
13    #  +- renamed sub to 'rebuildDb'
14    #
15    #  Revision 1.22  2002/12/18 22:28:16  jonen
16    #  + added extended logging at 'getObjectByGuid()'
17    #
18    #  Revision 1.21  2002/12/16 22:20:49  jonen
19    #  + fixed bug at 'getObjectByGuid()'
20    #
21    #  Revision 1.20  2002/12/16 20:49:17  jonen
22    #  + added sub 'getObjectByGuid()'
23    #  + added functionality to use 'getObjectByGuid' at 'getObjectAsHash()'
24    #
25    #  Revision 1.19  2002/12/16 06:46:09  joko
26    #  + attempt to introduce a generic '_patchSchema' - cancelled!
27    #
28    #  Revision 1.18  2002/12/13 21:48:07  joko
29    #  + fix to 'sub sendQuery'
30    #
31    #  Revision 1.17  2002/12/12 02:51:09  joko
32    #  + cosmetics
33    #
34    #  Revision 1.16  2002/12/11 06:54:10  joko
35    #  + fix: encapsulated object-loading inside an 'eval'
36    #
37    #  Revision 1.15  2002/12/05 13:55:21  joko
38    #  + now utilizing 'object2hash' instead of 'var_deref'
39    #  + played around with having fresh-objects - no progress....
40    #
41  #  Revision 1.14  2002/12/05 09:40:30  jonen  #  Revision 1.14  2002/12/05 09:40:30  jonen
42  #  + added option->{destroy} at getObject for unloading all instance  #  + added option->{destroy} at getObject for unloading all instance
43  #  #
# Line 78  use Data::Dumper; Line 113  use Data::Dumper;
113  use libp qw( getNewPerlObjectByPkgName );  use libp qw( getNewPerlObjectByPkgName );
114  use Data::Storage::Result::Tangram;  use Data::Storage::Result::Tangram;
115  use Data::Compare::Struct qw( isEmpty );  use Data::Compare::Struct qw( isEmpty );
116  use Data::Transform::Deep qw( var_deref );  use Data::Transform::Deep qw( object2hash );
117  use Data::Transform::Encode qw( var2utf8 );  use Data::Transform::Encode qw( var2utf8 );
118    
119    
# Line 108  sub _initSchema { Line 143  sub _initSchema {
143      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );
144      return 0;      return 0;
145    }    }
146      #$self->_patchSchema();
147    return 1;    return 1;
148  }  }
149    
150    sub _patchSchema {
151      my $self = shift;
152      foreach (keys %{$schema_tangram->{classes}}) {
153        next if $schema_tangram->{classes}->{$_}->{abstract};
154        #next if ($_ ne 'TsBankAccount');
155        #$_ ne 'AbstractAccount' &&
156        print "class: $_", "\n";
157    #print Dumper($schema_tangram->{classes}->{$_});
158        # create new string property named 'guid'
159        my $tstring = Tangram::String->new();
160        $tstring->{name} = $tstring->{col} = 'guid';
161        # inject property into schema
162        #$schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields}->{string}->{$tstring->{name}} = $tstring;
163        print Dumper($schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields});
164      }
165    }
166    
167  sub connect {  sub connect {
168    
169      my $self = shift;      my $self = shift;
170            
171      my $dsn = shift;      my $dsn = shift;
172    
173    #print Dumper($self);
174    #exit;
175    
176        # TODO: re-enable
177      $dsn ||= $self->{locator}->{dbi}->{dsn};      $dsn ||= $self->{locator}->{dbi}->{dsn};
       
178      $logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );      $logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );
179            
180      #my $storage = Tangram::Relational->connect( $schema, $dsn );      #my $storage = Tangram::Relational->connect( $schema, $dsn );
# Line 129  sub connect { Line 186  sub connect {
186  #      return;  #      return;
187  #    }  #    }
188    
189      return unless $self->_initSchema();      #return unless $self->_initSchema();
190        $self->_initSchema();
191    
192      # create the main tangram storage object      # create the main tangram storage object
193      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
# Line 321  sub retreatSchema { Line 379  sub retreatSchema {
379    return $ok;    return $ok;
380  }  }
381    
382  sub rebuildDbAndSchema {  sub rebuildDb {
383    my $self = shift;    my $self = shift;
384    $logger->info( __PACKAGE__ . "->rebuildDbAndSchema()" );    $logger->info( __PACKAGE__ . "->rebuildDb()" );
385    my @results;    my @results;
386    
387    # sum up results (bool (0/1)) in array    # sum up results (bool (0/1)) in array
# Line 419  sub createCursor { Line 477  sub createCursor {
477    
478  sub createSet {  sub createSet {
479    my $self = shift;    my $self = shift;
480    #print "-" x 80, "\n";
481    #print Dumper(@_);
482    my @objects = @_;    my @objects = @_;
483    my $rh = Set::Object->new();    my $rh = Set::Object->new();
484    foreach (@objects) {    foreach (@objects) {
485      #print Dumper($_);      if (!isEmpty($_)) {
486      $rh->insert($_) if !isEmpty($_);  #print Dumper($_);
487          $rh->insert($_);
488        }
489    }    }
490    #print Dumper($rh->members());    #print Dumper($rh->members());
491    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
# Line 447  sub sendQuery { Line 509  sub sendQuery {
509      my $ident = $query->{criterias}->[0]->{val};      my $ident = $query->{criterias}->[0]->{val};
510  #print "load obj", "\n";  #print "load obj", "\n";
511      #return $self->createSet() if $ident == 5;      #return $self->createSet() if $ident == 5;
512        $self->{_COREHANDLE}->unload($ident);
513      my $object = $self->{_COREHANDLE}->load($ident);      my $object = $self->{_COREHANDLE}->load($ident);
514  #print "get id", "\n";  #print "get id", "\n";
515      my $oid = $self->{_COREHANDLE}->id($object);      my $oid = $self->{_COREHANDLE}->id($object);
516    #print Dumper($object);
517    #print "oid: $oid", "\n";
518      return $self->createSet($object);      return $self->createSet($object);
519      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );
520    }    }
# Line 493  sub getObject { Line 558  sub getObject {
558    my $self = shift;    my $self = shift;
559    my $oid = shift;    my $oid = shift;
560    my $options = shift;    my $options = shift;
561    # TODO: create a deep_unload method  
562      # TODO: create a deep_unload method (currently _all_ objects are unloaded)
563    # unload($oid) will only unload object, not deep object hashes    # unload($oid) will only unload object, not deep object hashes
564    $self->{_COREHANDLE}->unload() if($options->{destroy});    $self->{_COREHANDLE}->unload() if ($options->{destroy});
565    
566    # TODO: review this    # TODO: review this
567    #if (!$self->{COREHANDLE}) { return; }    #if (!$self->{COREHANDLE}) { return; }
568    return $self->{_COREHANDLE}->load($oid);  
569      # TODO: review this
570      my $object = eval('$self->{_COREHANDLE}->load($oid);');
571      print $@, "\n" if $@;
572    
573      return $object if $object;
574    }
575    
576    sub getObjectByGuid {
577      my $self = shift;
578      my $guid = shift;
579      my $options = shift;
580      
581      # Guid and Classname is needed
582      if(!$guid || !$options->{classname}) {
583       $logger->error( __PACKAGE__ . "->getObjectByGuid: No 'guid' OR no Classname in options hash was given but needed!" );
584        return;
585      }
586      
587      # TODO: create a deep_unload method (currently _all_ objects are unloaded)
588      # unload($oid) will only unload object, not deep object hashes
589      $self->{_COREHANDLE}->unload() if ($options->{destroy});
590    
591      # search for object with given Classname and Guid
592      my $obj_tmp = $self->{_COREHANDLE}->remote($options->{classname});
593      my @result = $self->{_COREHANDLE}->select($obj_tmp, $obj_tmp->{guid} eq $guid);
594      
595      # we searched for global unique identifer of some object,
596      # so I think we can trust there would be only one result
597      if($result[0]) {
598        return $result[0];
599      } else {
600        $logger->error( __PACKAGE__ . "->getObjectByGuid: No Object with Classname $options->{classname} and GUID $guid found!" );
601        return;
602      }
603      
604  }  }
605    
606  sub getObjectAsHash {  sub getObjectAsHash {
607    my $self = shift;    my $self = shift;
608    my $oid = shift;    my $oid = shift;
609    my $options = shift;    my $options = shift;  
610    my $obj = $self->getObject($oid, $options);    my $obj;
611    my $deref = var_deref($obj);    
612    var2utf8($deref) if ($options->{utf8});    if($options->{guid}) {
613    #$obj->clear_refs;      $obj = $self->getObjectByGuid($oid, $options);
614    #$self->{COREHANDLE}->unload($obj) if($options->{destroy});    } else {
615    #$obj->DESTROY;      $obj = $self->getObject($oid, $options);
616    #undef($obj) if($options->{destroy});    }
617    return $deref;    
618      # build options (a callback to unload autovivified objects) for 'expand'
619      # TODO: use $logger to write to debug here!
620      my $cb; # = sub {};
621    =pod
622      if ($options->{destroy}) {
623        $options->{cb}->{destroy} = sub {
624          print "================ DESTROY", "\n";
625          my $object = shift;
626          #print Dumper($object);
627          $self->{_COREHANDLE}->unload($object);
628          #undef($object);
629        };
630      }
631    =cut
632    
633      my $hash = object2hash($obj, $options);
634      #$options->{cb}->{destroy}->($obj);
635      #$self->{_COREHANDLE}->unload($obj);
636      
637      # convert values in hash to utf8 to be ready for (e.g.) encapsulation in XML
638      # now done in object2hash
639      #var2utf8($hash) if ($options->{utf8});
640      
641      # old (wrong) attempts to get rid of used instances, if requested
642        #$obj->clear_refs;
643        #$self->{COREHANDLE}->unload($obj) if($options->{destroy});
644        #$obj->DESTROY;
645        #undef($obj) if($options->{destroy});
646      
647      return $hash;
648  }  }
649    
650  sub getSchema {  sub getSchema {
# Line 524  sub getCOREHANDLE { Line 656  sub getCOREHANDLE {
656    return $self->{_COREHANDLE};    return $self->{_COREHANDLE};
657  }  }
658    
659    sub dropDb {
660      my $self = shift;
661      my $storage = $self->_getSubLayerHandle();
662      return $storage->dropDb();
663    }
664    
665  1;  1;
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