/[cvs]/nfo/perl/libs/Data/Storage/Handler/Tangram.pm
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revision 1.12 by joko, Wed Dec 4 11:34:49 2002 UTC revision 1.19 by joko, Mon Dec 16 06:46:09 2002 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.19  2002/12/16 06:46:09  joko
7    #  + attempt to introduce a generic '_patchSchema' - cancelled!
8    #
9    #  Revision 1.18  2002/12/13 21:48:07  joko
10    #  + fix to 'sub sendQuery'
11    #
12    #  Revision 1.17  2002/12/12 02:51:09  joko
13    #  + cosmetics
14    #
15    #  Revision 1.16  2002/12/11 06:54:10  joko
16    #  + fix: encapsulated object-loading inside an 'eval'
17    #
18    #  Revision 1.15  2002/12/05 13:55:21  joko
19    #  + now utilizing 'object2hash' instead of 'var_deref'
20    #  + played around with having fresh-objects - no progress....
21    #
22    #  Revision 1.14  2002/12/05 09:40:30  jonen
23    #  + added option->{destroy} at getObject for unloading all instance
24    #
25    #  Revision 1.13  2002/12/05 07:59:04  joko
26    #  + now using Tie::SecureHash as a base for the COREHANDLE
27    #  + former public COREHANDLE becomes private _COREHANDLE now
28    #  + sub getCOREHANDLE
29    #
30  #  Revision 1.12  2002/12/04 11:34:49  joko  #  Revision 1.12  2002/12/04 11:34:49  joko
31  #  - $schema_tangram doesn't have to be in class?  #  - $schema_tangram doesn't have to be in class?
32  #  #
# Line 62  package Data::Storage::Handler::Tangram; Line 86  package Data::Storage::Handler::Tangram;
86  use strict;  use strict;
87  use warnings;  use warnings;
88    
89    use base ("Data::Storage::Handler");
90  use base ("Data::Storage::Handler::Abstract");  use base ("Data::Storage::Handler::Abstract");
91    
92  use Tangram;  use Tangram;
# Line 69  use Data::Dumper; Line 94  use Data::Dumper;
94  use libp qw( getNewPerlObjectByPkgName );  use libp qw( getNewPerlObjectByPkgName );
95  use Data::Storage::Result::Tangram;  use Data::Storage::Result::Tangram;
96  use Data::Compare::Struct qw( isEmpty );  use Data::Compare::Struct qw( isEmpty );
97  use Data::Transform::Deep qw( var_deref );  use Data::Transform::Deep qw( object2hash );
98  use Data::Transform::Encode qw( var2utf8 );  use Data::Transform::Encode qw( var2utf8 );
99    
100    
# Line 99  sub _initSchema { Line 124  sub _initSchema {
124      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );
125      return 0;      return 0;
126    }    }
127      #$self->_patchSchema();
128    return 1;    return 1;
129  }  }
130    
131    sub _patchSchema {
132      my $self = shift;
133      foreach (keys %{$schema_tangram->{classes}}) {
134        next if $schema_tangram->{classes}->{$_}->{abstract};
135        #next if ($_ ne 'TsBankAccount');
136        #$_ ne 'AbstractAccount' &&
137        print "class: $_", "\n";
138    #print Dumper($schema_tangram->{classes}->{$_});
139        # create new string property named 'guid'
140        my $tstring = Tangram::String->new();
141        $tstring->{name} = $tstring->{col} = 'guid';
142        # inject property into schema
143        #$schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields}->{string}->{$tstring->{name}} = $tstring;
144        print Dumper($schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields});
145      }
146    }
147    
148  sub connect {  sub connect {
149    
150      my $self = shift;      my $self = shift;
# Line 124  sub connect { Line 167  sub connect {
167    
168      # create the main tangram storage object      # create the main tangram storage object
169      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
170      $self->{COREHANDLE} = Tangram::Relational->connect( $schema_tangram, $dsn );      $self->{_COREHANDLE} = Tangram::Relational->connect( $schema_tangram, $dsn );
171    
172    #print "connect", "\n";
173    #my $core = $self->{_COREHANDLE};
174    #print Dumper($core);
175        
176      # some attempts for configuring the wrapped underlying dbi.....      # some attempts for configuring the wrapped underlying dbi.....
177      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();
# Line 230  sub _configureUnderlyingStorage { Line 277  sub _configureUnderlyingStorage {
277    foreach my $key (keys %{$self->{dbi}}) {    foreach my $key (keys %{$self->{dbi}}) {
278      my $val = $self->{dbi}->{$key};      my $val = $self->{dbi}->{$key};
279      print "entry: $key; $val", "\n";      print "entry: $key; $val", "\n";
280      $self->{COREHANDLE}->{db}->{$key} = $val;      $self->{_COREHANDLE}->{db}->{$key} = $val;
281    }    }
282    #print Dumper($self->{COREHANDLE}->{db});    #print Dumper($self->{COREHANDLE}->{db});
283  }  }
# Line 246  sub configureCOREHANDLE { Line 293  sub configureCOREHANDLE {
293    
294    # apply configured modifications    # apply configured modifications
295      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {
296        $self->{COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});        $self->{_COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});
297      }      }
298      if (exists $self->{dbi}->{RaiseError}) {      if (exists $self->{dbi}->{RaiseError}) {
299        $self->{COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};        $self->{_COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};
300      }      }
301      if (exists $self->{dbi}->{PrintError}) {      if (exists $self->{dbi}->{PrintError}) {
302        $self->{COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};        $self->{_COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};
303      }      }
304      if (exists $self->{dbi}->{HandleError}) {      if (exists $self->{dbi}->{HandleError}) {
305        $self->{COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};        $self->{_COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};
306      }      }
307    
308  }  }
# Line 334  sub getListUnfiltered { Line 381  sub getListUnfiltered {
381    my @results;    my @results;
382    $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );    $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );
383    # get set of objects from odbms by object name    # get set of objects from odbms by object name
384    my $object_set = $self->{COREHANDLE}->remote($nodename);    my $object_set = $self->{_COREHANDLE}->remote($nodename);
385    @results = $self->{COREHANDLE}->select($object_set);    @results = $self->{_COREHANDLE}->select($object_set);
386    return \@results;    return \@results;
387  }  }
388    
# Line 380  sub getListFiltered { Line 427  sub getListFiltered {
427    my $tfilter = join(' & ', @tfilters);    my $tfilter = join(' & ', @tfilters);
428    
429    # get set of objects from odbms by object name    # get set of objects from odbms by object name
430    my $remote = $self->{COREHANDLE}->remote($nodename);    my $remote = $self->{_COREHANDLE}->remote($nodename);
431        
432    # was:    # was:
433    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);
434    
435    # is:    # is:
436    # 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
437    my $evalstring = 'return $self->{COREHANDLE}->select($remote, ' . $tfilter . ');';    my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';
438        
439    # get filtered list/set    # get filtered list/set
440    @results = eval($evalstring);    @results = eval($evalstring);
# Line 399  sub getListFiltered { Line 446  sub getListFiltered {
446  sub createCursor {  sub createCursor {
447    my $self = shift;    my $self = shift;
448    my $node = shift;    my $node = shift;
449    my $cmdHandle = $self->{COREHANDLE}->cursor($node);    my $cmdHandle = $self->{_COREHANDLE}->cursor($node);
450    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );
451    return $result;    return $result;
452  }  }
453    
454  sub createSet {  sub createSet {
455    my $self = shift;    my $self = shift;
456    #print "-" x 80, "\n";
457    #print Dumper(@_);
458    my @objects = @_;    my @objects = @_;
459    my $rh = Set::Object->new();    my $rh = Set::Object->new();
460    foreach (@objects) {    foreach (@objects) {
461      #print Dumper($_);      if (!isEmpty($_)) {
462      $rh->insert($_) if !isEmpty($_);  #print Dumper($_);
463          $rh->insert($_);
464        }
465    }    }
466    #print Dumper($rh->members());    #print Dumper($rh->members());
467    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
# Line 434  sub sendQuery { Line 485  sub sendQuery {
485      my $ident = $query->{criterias}->[0]->{val};      my $ident = $query->{criterias}->[0]->{val};
486  #print "load obj", "\n";  #print "load obj", "\n";
487      #return $self->createSet() if $ident == 5;      #return $self->createSet() if $ident == 5;
488      my $object = $self->{COREHANDLE}->load($ident);      $self->{_COREHANDLE}->unload($ident);
489        my $object = $self->{_COREHANDLE}->load($ident);
490  #print "get id", "\n";  #print "get id", "\n";
491      my $oid = $self->{COREHANDLE}->id($object);      my $oid = $self->{_COREHANDLE}->id($object);
492    #print Dumper($object);
493    #print "oid: $oid", "\n";
494      return $self->createSet($object);      return $self->createSet($object);
495      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );
496    }    }
# Line 465  sub sendQuery { Line 519  sub sendQuery {
519  sub eraseAll {  sub eraseAll {
520    my $self = shift;    my $self = shift;
521    my $classname = shift;    my $classname = shift;
522    my $remote = $self->{COREHANDLE}->remote($classname);    my $remote = $self->{_COREHANDLE}->remote($classname);
523    my @objs = $self->{COREHANDLE}->select($remote);    my @objs = $self->{_COREHANDLE}->select($remote);
524    $self->{COREHANDLE}->erase(@objs);    $self->{_COREHANDLE}->erase(@objs);
525  }  }
526    
527  sub createDb {  sub createDb {
# Line 479  sub createDb { Line 533  sub createDb {
533  sub getObject {  sub getObject {
534    my $self = shift;    my $self = shift;
535    my $oid = shift;    my $oid = shift;
536      my $options = shift;
537    
538      # TODO: create a deep_unload method (currently _all_ objects are unloaded)
539      # unload($oid) will only unload object, not deep object hashes
540      $self->{_COREHANDLE}->unload() if ($options->{destroy});
541    
542    # TODO: review this    # TODO: review this
543    #if (!$self->{COREHANDLE}) { return; }    #if (!$self->{COREHANDLE}) { return; }
544    return $self->{COREHANDLE}->load($oid);  
545      # TODO: review this
546      my $object = eval('$self->{_COREHANDLE}->load($oid);');
547      print $@, "\n" if $@;
548    
549      return $object if $object;
550  }  }
551    
552  sub getObjectAsHash {  sub getObjectAsHash {
553    my $self = shift;    my $self = shift;
554    my $oid = shift;    my $oid = shift;
555    my $options = shift;    my $options = shift;
556    my $obj = $self->getObject($oid);    my $obj = $self->getObject($oid, $options);
557    my $deref = var_deref($obj);    
558    var2utf8($deref) if ($options->{utf8});    # build options (a callback to unload autovivified objects) for 'expand'
559    undef($obj) if($options->{destroy});    # TODO: use $logger to write to debug here!
560    return $deref;    my $cb; # = sub {};
561    =pod
562      if ($options->{destroy}) {
563        $options->{cb}->{destroy} = sub {
564          print "================ DESTROY", "\n";
565          my $object = shift;
566          #print Dumper($object);
567          $self->{_COREHANDLE}->unload($object);
568          #undef($object);
569        };
570      }
571    =cut
572    
573      my $hash = object2hash($obj, $options);
574      #$options->{cb}->{destroy}->($obj);
575      #$self->{_COREHANDLE}->unload($obj);
576      
577      # convert values in hash to utf8 to be ready for (e.g.) encapsulation in XML
578      # now done in object2hash
579      #var2utf8($hash) if ($options->{utf8});
580      
581      # old (wrong) attempts to get rid of used instances, if requested
582        #$obj->clear_refs;
583        #$self->{COREHANDLE}->unload($obj) if($options->{destroy});
584        #$obj->DESTROY;
585        #undef($obj) if($options->{destroy});
586      
587      return $hash;
588  }  }
589    
590  sub getSchema {  sub getSchema {
591    return $schema_tangram;    return $schema_tangram;
592  }  }
593    
594    sub getCOREHANDLE {
595      my $self = shift;
596      return $self->{_COREHANDLE};
597    }
598    
599  1;  1;
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