Storage/Handler/Tangram.pm

############################################
#
#  $Id: Tangram.pm,v 1.18 2002/12/13 21:48:07 joko Exp $
#
#  $Log: Tangram.pm,v $
#  Revision 1.18  2002/12/13 21:48:07  joko
#  + fix to 'sub sendQuery'
#
#  Revision 1.17  2002/12/12 02:51:09  joko
#  + cosmetics
#
#  Revision 1.16  2002/12/11 06:54:10  joko
#  + fix: encapsulated object-loading inside an 'eval'
#
#  Revision 1.15  2002/12/05 13:55:21  joko
#  + now utilizing 'object2hash' instead of 'var_deref'
#  + played around with having fresh-objects - no progress....
#
#  Revision 1.14  2002/12/05 09:40:30  jonen
#  + added option->{destroy} at getObject for unloading all instance
#
#  Revision 1.13  2002/12/05 07:59:04  joko
#  + now using Tie::SecureHash as a base for the COREHANDLE
#  + former public COREHANDLE becomes private _COREHANDLE now
#  + sub getCOREHANDLE
#
#  Revision 1.12  2002/12/04 11:34:49  joko
#  - $schema_tangram doesn't have to be in class?
#
#  Revision 1.11  2002/12/04 08:54:08  jonen
#  + untested bugfix: undef($object) after transform to hash at getObjectAsHash
#
#  Revision 1.10  2002/12/03 15:53:23  joko
#  + small bugfix regarding object hierarchy
#
#  Revision 1.9  2002/12/03 05:29:40  joko
#  + sub getObject
#  + sub getObjectAsHash
#
#  Revision 1.8  2002/12/01 22:25:51  joko
#  + now utilizing metadata from storage locator when connecting to DBI in "raw"-mode
#
#  Revision 1.7  2002/12/01 04:46:19  joko
#  + sub eraseAll
#
#  Revision 1.6  2002/11/29 05:02:30  joko
#  - sub getNewPerlObjectByPkgName (moved to libp.pm)
#  + sub getMetaInfo
#  - sub existsChildNode (moved to Abstract.pm)
#  + sub getListUnfiltered
#  + sub getListFiltered
#  + sub createCursor
#  + sub createSet
#  + sub sendQuery
#
#  Revision 1.5  2002/11/17 06:35:18  joko
#  + locator metadata can now be reached via ->{locator}
#  - getChildNodes is now wrapped via COREHANDLE
#
#  Revision 1.4  2002/10/25 11:44:44  joko
#  + sub _initSchema
#  + sub existsChildNode
#  + sub testIntegrity
#  + sub rebuildDbAndSchema
#
#  Revision 1.3  2002/10/17 03:56:55  joko
#  + bugfix: trapped eval error
#
#  Revision 1.2  2002/10/17 00:10:05  joko
#  + removed dependency from tsobj.pm, schema is now independent
#  + sub getNewPerlObjectByPkgName
#  + sub deploySchema
#  + sub retreatSchema
#
#  Revision 1.1  2002/10/10 03:44:07  cvsjoko
#  + new
#
############################################


package Data::Storage::Handler::Tangram;

use strict;
use warnings;

use base ("Data::Storage::Handler");
use base ("Data::Storage::Handler::Abstract");

use Tangram;
use Data::Dumper;
use libp qw( getNewPerlObjectByPkgName );
use Data::Storage::Result::Tangram;
use Data::Compare::Struct qw( isEmpty );
use Data::Transform::Deep qw( object2hash );
use Data::Transform::Encode qw( var2utf8 );


# get logger instance
my $logger = Log::Dispatch::Config->instance;


# this holds the complete instantiated schema from tangram
my $schema_tangram;

sub getMetaInfo {
  my $self = shift;
  $logger->debug( __PACKAGE__ . "->getMetaInfo()"  );
  return {
    'disconnectMethod' => 'disconnect',
  };
}

sub _initSchema {
  my $self = shift;
  $logger->debug( __PACKAGE__ . "->_initSchema()" );
  #if (!$schema_tangram) {
    my $obj = getNewPerlObjectByPkgName($self->{locator}->{schema}, { EXPORT_OBJECTS => $self->{locator}->{classnames}, want_transactions => $self->{locator}->{want_transactions} } );
    $schema_tangram = $obj->getSchema();
  #}
  if (!$schema_tangram) {
    $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );
    return 0;
  }
  #$self->_patchSchema();
  return 1;
}

sub _patchSchema {
  my $self = shift;
  foreach (keys %{$schema_tangram->{classes}}) {
    next if $schema_tangram->{classes}->{$_}->{abstract};
    #next if ($_ ne 'TsBankAccount');
    #$_ ne 'AbstractAccount' && 
    print "class: $_", "\n";
#print Dumper($schema_tangram->{classes}->{$_});
    # create new string property named 'guid'
    my $tstring = Tangram::String->new();
    $tstring->{name} = $tstring->{col} = 'guid';
    # inject property into schema
    #$schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields}->{string}->{$tstring->{name}} = $tstring;
    print Dumper($schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields});
  }
}

sub connect {

    my $self = shift;
    
    my $dsn = shift;
    $dsn ||= $self->{locator}->{dbi}->{dsn};
    
    $logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );
    
    #my $storage = Tangram::Relational->connect( $schema, $dsn );
    #my $storage = Tangram::mysql->connect( $schema, $dsn );
    #$storage = Tangram::Relational->connect( Project->schema, $dsn );
    
#    if (!testDsn($dsn)) {
#      croak("Database at \"$dsn\" is not available");
#      return;
#    }

    return unless $self->_initSchema();

    # create the main tangram storage object
    #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
    $self->{_COREHANDLE} = Tangram::Relational->connect( $schema_tangram, $dsn );

#print "connect", "\n";
#my $core = $self->{_COREHANDLE};
#print Dumper($core);
  
    # some attempts for configuring the wrapped underlying dbi.....
    #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();
    #$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE();
    #$self->_configureUnderlyingStorage;
    
    # ..... encapsulation wins!
    $self->configureCOREHANDLE();

  $self->{locator}->{status}->{connected} = 1;

  return 1;

}

sub getChildNodes {

  my $self = shift;
  my @nodes;

  $logger->debug( __PACKAGE__ . "->getChildNodes()" );

  # create new DBI - Data::Storage - object from already connected DBI::db - handle inside the current COREHANDLE
  #my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} });
  #my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} );
  
  # todo: should we retrieve information from the schema here
  # rather than poorly getting table names from underlying dbi?
  my $storage = $self->_getSubLayerHandle();
  @nodes = @{$storage->getChildNodes()};
  #$storage->_configureCOREHANDLE();
#print "getchildnodes\n";
#print Dumper($self);
  #if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {
  
  # TODO: REVIEW
  #$storage->disconnect();
  
  $self->{meta}->{childnodes} = \@nodes;
  
  return \@nodes;

}


sub testIntegrity {

  my $self = shift;

  $logger->debug( __PACKAGE__ . "->testIntegrity()" );

  # 1st test: are there tables?
  if (!$self->getChildNodes()) {
    $logger->warning( __PACKAGE__ . "->testIntegrity no childnodes exist" );
    return;
  }

  # 2nd test: is there a table named "Tangram"?
  if (!$self->existsChildNode("Tangram")) {
    $logger->warning( __PACKAGE__ . "->testIntegrity childnode \"Tangram\" doesn't exist" );
    return;
  }

  $self->{locator}->{status}->{integrity} = 1;
  return 1;

}


sub _getSubLayerHandle {
  
  my $self = shift;
  
  $logger->debug( __PACKAGE__ . "->_getSubLayerHandle()" );

  #print Dumper($self);

  # hack, make more generic!
  if (!$self->{dataStorageLayer}) {
    $logger->debug( __PACKAGE__ . "->_getSubLayerHandle() creating new dataStorageLayer" );
    #my $loc = Data::Storage::Locator->new( type => "DBI", dbi => $self->{dbi}, COREHANDLE => $self->{COREHANDLE}->{db} );
    my $loc = Data::Storage::Locator->new( { type => "DBI", dbi => $self->{locator}->{dbi} } );
    $self->{dataStorageLayer} = Data::Storage->new( $loc, { protected => 1 } );
    #$self->{STORAGE_UNDER_THE_HOOD}->{STORAGEHANDLE}->_configureCOREHANDLE();
    #$self->{STORAGE_UNDER_THE_HOOD}->_configureCOREHANDLE();
  }
  
  #print Dumper($self->{STORAGE_UNDER_THE_HOOD});
  
  return $self->{dataStorageLayer};
  
}

sub _configureUnderlyingStorage {
  
  my $self = shift;

  $logger->debug( __PACKAGE__ . "->_configureUnderlyingStorage" );

  $self->_configureCOREHANDLE_DBI();
  return;
  
  foreach my $key (keys %{$self->{dbi}}) {
    my $val = $self->{dbi}->{$key};
    print "entry: $key; $val", "\n";
    $self->{_COREHANDLE}->{db}->{$key} = $val;
  }
  #print Dumper($self->{COREHANDLE}->{db});
}


sub configureCOREHANDLE {

  my $self = shift;

  $logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );

  #my $subLayer = $self->_getSubLayerHandle();

  # apply configured modifications
    if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {
      $self->{_COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});
    }
    if (exists $self->{dbi}->{RaiseError}) {
      $self->{_COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};
    }
    if (exists $self->{dbi}->{PrintError}) {
      $self->{_COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};
    }
    if (exists $self->{dbi}->{HandleError}) {
      $self->{_COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};
    }

}

sub deploySchema {
  my $self = shift;
  my $args = shift;
  
  my $dsn = $self->{locator}->{dbi}->{dsn};

  $logger->debug( __PACKAGE__ . "->deploySchema( dsn $dsn )" );

  my $ok;
  if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
    return unless $self->_initSchema();
    $ok = Tangram::Relational->deploy($schema_tangram, $dbh );
    $dbh->disconnect();
  }
  return $ok;
}

sub retreatSchema {

  my $self = shift;
  my $dsn = $self->{locator}->{dbi}->{dsn};

  $logger->debug( __PACKAGE__ . "->retreatSchema( dsn $dsn )" );

  my $ok;
  if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {

    return unless $self->_initSchema();
    
    #use Data::Dumper; print Dumper($self);
    $self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");
    
    $ok = Tangram::Relational->retreat($schema_tangram, $dbh );

    # answer "$ok=2" means "maybe" for now - we have to patch this to a constant here because...
    # - ... Tangram::Relational->retreat doesn't seem to return a valid status
    # - possible improvement:
    #   - test this by checking for count of tables in database
    #   - problem with this: there may be some left not having been included to the schema
    #   - maybe better: use "->getChildNodes"?
    $ok = 2;

    $dbh->disconnect();

  }
  return $ok;
}

sub rebuildDbAndSchema {
  my $self = shift;
  $logger->info( __PACKAGE__ . "->rebuildDbAndSchema()" );
  my @results;

  # sum up results (bool (0/1)) in array
  push @results, $self->retreatSchema();
  push @results, $self->{dataStorageLayer}->dropDb();
  push @results, $self->{dataStorageLayer}->createDb();
  push @results, $self->deploySchema();

  # scan array for "bad ones"
  my $res = 1;
  map {
    $res = 0 if (!$_);
  } @results;
  
  return $res;
}

sub getListUnfiltered {
  my $self = shift;
  my $nodename = shift;
  my @results;
  $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );
  # get set of objects from odbms by object name
  my $object_set = $self->{_COREHANDLE}->remote($nodename);
  @results = $self->{_COREHANDLE}->select($object_set);
  return \@results;
}

sub getListFiltered {
  my $self = shift;

  # redirect to unfiltered mode
  #return $self->getListUnfiltered(@_);

  my $nodename = shift;
  my $filters = shift;
  my @results;
  $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );

  #print Dumper($filters);
  
  my @tfilters;
  
  foreach my $filter (@$filters) {
  
    # get filter - TODO: for each filter
    #my $filter = $filters->[0];
  
    # build filter
    my $lexpr = $filter->{key};
    #my $op = $filter->{op};
    my $op = '=';
    my $rexpr = $filter->{val};
    my $tight = 100;
    
  #  my $tfilter = Tangram::Filter->new(
  #    expr => "t1.$lexpr $op '$rexpr'",
  #    tight => $tight,
  #    objects => $objects,
  #  );
  
    # HACK: build eval-string (sorry) to get filtered list - please give advice here
    push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";

  }

  my $tfilter = join(' & ', @tfilters);

  # get set of objects from odbms by object name
  my $remote = $self->{_COREHANDLE}->remote($nodename);
  
  # was:
  #@results = $self->{COREHANDLE}->select($object_set, $tfilter);

  # is:
  # HACK: build eval-string (sorry) to get filtered list - please give advice here
  my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';
  
  # get filtered list/set
  @results = eval($evalstring);
  die $@ if $@;
  
  return \@results;
}

sub createCursor {
  my $self = shift;
  my $node = shift;
  my $cmdHandle = $self->{_COREHANDLE}->cursor($node);
  my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );
  return $result;
}

sub createSet {
  my $self = shift;
#print "-" x 80, "\n";
#print Dumper(@_);
  my @objects = @_;
  my $rh = Set::Object->new();
  foreach (@objects) {
    if (!isEmpty($_)) {
#print Dumper($_);
      $rh->insert($_);
    }
  }
  #print Dumper($rh->members());
  my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
  return $result;
}

sub sendQuery {
  my $self = shift;
  my $query = shift;
  #my $sql = "SELECT cs FROM $self->{metainfo}->{$descent}->{node} WHERE $self->{metainfo}->{$descent}->{IdentProvider}->{arg}='$self->{entry}->{source}->{ident}';";
  #my $result = $self->{metainfo}->{$descent}->{storage}->sendCommand($sql);

  #print Dumper($query);

  # HACK: special case: querying by id does not translate into a common tangram query
  # just load the object by given id(ent)
  if ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq') {
    #print "LOAD!!!", "\n";
    #exit;
    #return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );
    my $ident = $query->{criterias}->[0]->{val};
#print "load obj", "\n";
    #return $self->createSet() if $ident == 5;
    $self->{_COREHANDLE}->unload($ident);
    my $object = $self->{_COREHANDLE}->load($ident);
#print "get id", "\n";
    my $oid = $self->{_COREHANDLE}->id($object);
#print Dumper($object);
#print "oid: $oid", "\n";
    return $self->createSet($object);
    #return $self->createSet( $self->{COREHANDLE}->load('300090018') );
  }

  die("This should not be reached for now - redirect to \$self->getListFiltered() here!");

  # TODO: do a common tangram query here

  my @crits;
  foreach (@{$query->{criterias}}) {
    my $op = '';
    $op = '=' if lc $_->{op} eq 'eq';
    push @crits, "$_->{key}$op'$_->{val}'";
  }
  my $subnodes = {};
  map { $subnodes->{$_}++ } @{$query->{subnodes}};
  # HACK: this is hardcoded ;(    expand possibilities!
  #my $crit = join(' AND ', @crits);
  #my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit);
  #return $self->sendCommand($sql);
  #my $h = $self->{COREHANDLE}->remote($query->{node});
  #my $res = $self->{COREHANDLE}->select($h, $h->{);
  return $self->createCursor($query->{node});
}

sub eraseAll {
  my $self = shift;
  my $classname = shift;
  my $remote = $self->{_COREHANDLE}->remote($classname);
  my @objs = $self->{_COREHANDLE}->select($remote);
  $self->{_COREHANDLE}->erase(@objs);
}

sub createDb {
  my $self = shift;
  my $storage = $self->_getSubLayerHandle();
  return $storage->createDb();
}

sub getObject {
  my $self = shift;
  my $oid = shift;
  my $options = shift;

  # TODO: create a deep_unload method (currently _all_ objects are unloaded)
  # unload($oid) will only unload object, not deep object hashes
  $self->{_COREHANDLE}->unload() if ($options->{destroy});

  # TODO: review this
  #if (!$self->{COREHANDLE}) { return; }

  # TODO: review this
  my $object = eval('$self->{_COREHANDLE}->load($oid);');
  print $@, "\n" if $@;

  return $object if $object;
}

sub getObjectAsHash {
  my $self = shift;
  my $oid = shift;
  my $options = shift;
  my $obj = $self->getObject($oid, $options);
  
  # build options (a callback to unload autovivified objects) for 'expand'
  # TODO: use $logger to write to debug here!
  my $cb; # = sub {};
=pod
  if ($options->{destroy}) {
    $options->{cb}->{destroy} = sub {
      print "================ DESTROY", "\n";
      my $object = shift;
      #print Dumper($object);
      $self->{_COREHANDLE}->unload($object);
      #undef($object);
    };
  }
=cut

  my $hash = object2hash($obj, $options);
  #$options->{cb}->{destroy}->($obj);
  #$self->{_COREHANDLE}->unload($obj);
  
  # convert values in hash to utf8 to be ready for (e.g.) encapsulation in XML
  # now done in object2hash
  #var2utf8($hash) if ($options->{utf8});
  
  # old (wrong) attempts to get rid of used instances, if requested
    #$obj->clear_refs;
    #$self->{COREHANDLE}->unload($obj) if($options->{destroy});
    #$obj->DESTROY;
    #undef($obj) if($options->{destroy});
  
  return $hash;
}

sub getSchema {
  return $schema_tangram;
}

sub getCOREHANDLE {
  my $self = shift;
  return $self->{_COREHANDLE};
}

1;
1	joko	1.6	############################################
2	cvsjoko	1.1	#
3	joko	1.19	# $Id: Tangram.pm,v 1.18 2002/12/13 21:48:07 joko Exp $
4	joko	1.2	#
5			# $Log: Tangram.pm,v $
6	joko	1.19	# Revision 1.18 2002/12/13 21:48:07 joko
7			# + fix to 'sub sendQuery'
8			#
9	joko	1.18	# Revision 1.17 2002/12/12 02:51:09 joko
10			# + cosmetics
11			#
12	joko	1.17	# Revision 1.16 2002/12/11 06:54:10 joko
13			# + fix: encapsulated object-loading inside an 'eval'
14			#
15	joko	1.16	# Revision 1.15 2002/12/05 13:55:21 joko
16			# + now utilizing 'object2hash' instead of 'var_deref'
17			# + played around with having fresh-objects - no progress....
18			#
19	joko	1.15	# Revision 1.14 2002/12/05 09:40:30 jonen
20			# + added option->{destroy} at getObject for unloading all instance
21			#
22	jonen	1.14	# Revision 1.13 2002/12/05 07:59:04 joko
23			# + now using Tie::SecureHash as a base for the COREHANDLE
24			# + former public COREHANDLE becomes private _COREHANDLE now
25			# + sub getCOREHANDLE
26			#
27	joko	1.13	# Revision 1.12 2002/12/04 11:34:49 joko
28			# - $schema_tangram doesn't have to be in class?
29			#
30	joko	1.12	# Revision 1.11 2002/12/04 08:54:08 jonen
31			# + untested bugfix: undef($object) after transform to hash at getObjectAsHash
32			#
33	jonen	1.11	# Revision 1.10 2002/12/03 15:53:23 joko
34			# + small bugfix regarding object hierarchy
35			#
36	joko	1.10	# Revision 1.9 2002/12/03 05:29:40 joko
37			# + sub getObject
38			# + sub getObjectAsHash
39			#
40	joko	1.9	# Revision 1.8 2002/12/01 22:25:51 joko
41			# + now utilizing metadata from storage locator when connecting to DBI in "raw"-mode
42			#
43	joko	1.8	# Revision 1.7 2002/12/01 04:46:19 joko
44			# + sub eraseAll
45			#
46	joko	1.7	# Revision 1.6 2002/11/29 05:02:30 joko
47			# - sub getNewPerlObjectByPkgName (moved to libp.pm)
48			# + sub getMetaInfo
49			# - sub existsChildNode (moved to Abstract.pm)
50			# + sub getListUnfiltered
51			# + sub getListFiltered
52			# + sub createCursor
53			# + sub createSet
54			# + sub sendQuery
55			#
56	joko	1.6	# Revision 1.5 2002/11/17 06:35:18 joko
57			# + locator metadata can now be reached via ->{locator}
58			# - getChildNodes is now wrapped via COREHANDLE
59			#
60	joko	1.5	# Revision 1.4 2002/10/25 11:44:44 joko
61			# + sub _initSchema
62			# + sub existsChildNode
63			# + sub testIntegrity
64			# + sub rebuildDbAndSchema
65			#
66	joko	1.4	# Revision 1.3 2002/10/17 03:56:55 joko
67			# + bugfix: trapped eval error
68			#
69	joko	1.3	# Revision 1.2 2002/10/17 00:10:05 joko
70			# + removed dependency from tsobj.pm, schema is now independent
71			# + sub getNewPerlObjectByPkgName
72			# + sub deploySchema
73			# + sub retreatSchema
74			#
75	joko	1.2	# Revision 1.1 2002/10/10 03:44:07 cvsjoko
76			# + new
77	cvsjoko	1.1	#
78	joko	1.6	############################################
79
80	cvsjoko	1.1
81			package Data::Storage::Handler::Tangram;
82
83			use strict;
84			use warnings;
85
86	joko	1.13	use base ("Data::Storage::Handler");
87	cvsjoko	1.1	use base ("Data::Storage::Handler::Abstract");
88
89			use Tangram;
90			use Data::Dumper;
91	joko	1.6	use libp qw( getNewPerlObjectByPkgName );
92			use Data::Storage::Result::Tangram;
93			use Data::Compare::Struct qw( isEmpty );
94	joko	1.15	use Data::Transform::Deep qw( object2hash );
95	joko	1.9	use Data::Transform::Encode qw( var2utf8 );
96
97	cvsjoko	1.1
98			# get logger instance
99			my $logger = Log::Dispatch::Config->instance;
100
101
102	joko	1.12	# this holds the complete instantiated schema from tangram
103			my $schema_tangram;
104
105	joko	1.6	sub getMetaInfo {
106			my $self = shift;
107			$logger->debug( __PACKAGE__ . "->getMetaInfo()" );
108			return {
109			'disconnectMethod' => 'disconnect',
110			};
111	joko	1.2	}
112
113	joko	1.4	sub _initSchema {
114			my $self = shift;
115			$logger->debug( __PACKAGE__ . "->_initSchema()" );
116	joko	1.12	#if (!$schema_tangram) {
117	joko	1.5	my $obj = getNewPerlObjectByPkgName($self->{locator}->{schema}, { EXPORT_OBJECTS => $self->{locator}->{classnames}, want_transactions => $self->{locator}->{want_transactions} } );
118	joko	1.12	$schema_tangram = $obj->getSchema();
119	joko	1.4	#}
120	joko	1.12	if (!$schema_tangram) {
121	joko	1.4	$logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );
122			return 0;
123			}
124	joko	1.19	#$self->_patchSchema();
125	joko	1.4	return 1;
126	joko	1.19	}
127
128			sub _patchSchema {
129			my $self = shift;
130			foreach (keys %{$schema_tangram->{classes}}) {
131			next if $schema_tangram->{classes}->{$_}->{abstract};
132			#next if ($_ ne 'TsBankAccount');
133			#$_ ne 'AbstractAccount' &&
134			print "class: $_", "\n";
135			#print Dumper($schema_tangram->{classes}->{$_});
136			# create new string property named 'guid'
137			my $tstring = Tangram::String->new();
138			$tstring->{name} = $tstring->{col} = 'guid';
139			# inject property into schema
140			#$schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields}->{string}->{$tstring->{name}} = $tstring;
141			print Dumper($schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields});
142			}
143	joko	1.4	}
144
145	cvsjoko	1.1	sub connect {
146
147			my $self = shift;
148
149			my $dsn = shift;
150	joko	1.5	$dsn \|\|= $self->{locator}->{dbi}->{dsn};
151	cvsjoko	1.1
152	joko	1.2	$logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );
153	cvsjoko	1.1
154			#my $storage = Tangram::Relational->connect( $schema, $dsn );
155			#my $storage = Tangram::mysql->connect( $schema, $dsn );
156			#$storage = Tangram::Relational->connect( Project->schema, $dsn );
157
158			# if (!testDsn($dsn)) {
159			# croak("Database at \"$dsn\" is not available");
160			# return;
161			# }
162
163	joko	1.4	return unless $self->_initSchema();
164
165	joko	1.6	# create the main tangram storage object
166	joko	1.2	#$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
167	joko	1.13	$self->{_COREHANDLE} = Tangram::Relational->connect( $schema_tangram, $dsn );
168
169			#print "connect", "\n";
170			#my $core = $self->{_COREHANDLE};
171			#print Dumper($core);
172	cvsjoko	1.1
173	joko	1.6	# some attempts for configuring the wrapped underlying dbi.....
174	cvsjoko	1.1	#$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();
175			#$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE();
176			#$self->_configureUnderlyingStorage;
177	joko	1.6
178			# ..... encapsulation wins!
179	cvsjoko	1.1	$self->configureCOREHANDLE();
180
181	joko	1.5	$self->{locator}->{status}->{connected} = 1;
182
183	joko	1.4	return 1;
184
185	cvsjoko	1.1	}
186
187			sub getChildNodes {
188
189			my $self = shift;
190			my @nodes;
191
192	joko	1.4	$logger->debug( __PACKAGE__ . "->getChildNodes()" );
193
194	cvsjoko	1.1	# create new DBI - Data::Storage - object from already connected DBI::db - handle inside the current COREHANDLE
195			#my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} });
196			#my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} );
197	joko	1.6
198			# todo: should we retrieve information from the schema here
199			# rather than poorly getting table names from underlying dbi?
200	cvsjoko	1.1	my $storage = $self->_getSubLayerHandle();
201	joko	1.5	@nodes = @{$storage->getChildNodes()};
202	cvsjoko	1.1	#$storage->_configureCOREHANDLE();
203	joko	1.5	#print "getchildnodes\n";
204			#print Dumper($self);
205	cvsjoko	1.1	#if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {
206
207	joko	1.8	# TODO: REVIEW
208			#$storage->disconnect();
209	cvsjoko	1.1
210	joko	1.4	$self->{meta}->{childnodes} = \@nodes;
211
212	cvsjoko	1.1	return \@nodes;
213
214			}
215
216
217	joko	1.4	sub testIntegrity {
218
219			my $self = shift;
220
221			$logger->debug( __PACKAGE__ . "->testIntegrity()" );
222
223			# 1st test: are there tables?
224			if (!$self->getChildNodes()) {
225			$logger->warning( __PACKAGE__ . "->testIntegrity no childnodes exist" );
226			return;
227			}
228
229			# 2nd test: is there a table named "Tangram"?
230			if (!$self->existsChildNode("Tangram")) {
231			$logger->warning( __PACKAGE__ . "->testIntegrity childnode \"Tangram\" doesn't exist" );
232			return;
233			}
234
235	joko	1.5	$self->{locator}->{status}->{integrity} = 1;
236	joko	1.4	return 1;
237
238			}
239
240
241	cvsjoko	1.1	sub _getSubLayerHandle {
242
243			my $self = shift;
244
245	joko	1.4	$logger->debug( __PACKAGE__ . "->_getSubLayerHandle()" );
246
247	cvsjoko	1.1	#print Dumper($self);
248	joko	1.5
249	cvsjoko	1.1	# hack, make more generic!
250	joko	1.4	if (!$self->{dataStorageLayer}) {
251			$logger->debug( __PACKAGE__ . "->_getSubLayerHandle() creating new dataStorageLayer" );
252			#my $loc = Data::Storage::Locator->new( type => "DBI", dbi => $self->{dbi}, COREHANDLE => $self->{COREHANDLE}->{db} );
253	joko	1.5	my $loc = Data::Storage::Locator->new( { type => "DBI", dbi => $self->{locator}->{dbi} } );
254	joko	1.4	$self->{dataStorageLayer} = Data::Storage->new( $loc, { protected => 1 } );
255	cvsjoko	1.1	#$self->{STORAGE_UNDER_THE_HOOD}->{STORAGEHANDLE}->_configureCOREHANDLE();
256			#$self->{STORAGE_UNDER_THE_HOOD}->_configureCOREHANDLE();
257			}
258
259			#print Dumper($self->{STORAGE_UNDER_THE_HOOD});
260
261	joko	1.4	return $self->{dataStorageLayer};
262	cvsjoko	1.1
263			}
264
265			sub _configureUnderlyingStorage {
266
267			my $self = shift;
268	joko	1.4
269			$logger->debug( __PACKAGE__ . "->_configureUnderlyingStorage" );
270
271	cvsjoko	1.1	$self->_configureCOREHANDLE_DBI();
272			return;
273
274			foreach my $key (keys %{$self->{dbi}}) {
275			my $val = $self->{dbi}->{$key};
276			print "entry: $key; $val", "\n";
277	joko	1.13	$self->{_COREHANDLE}->{db}->{$key} = $val;
278	cvsjoko	1.1	}
279			#print Dumper($self->{COREHANDLE}->{db});
280			}
281
282
283			sub configureCOREHANDLE {
284
285			my $self = shift;
286
287	joko	1.4	$logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );
288	cvsjoko	1.1
289			#my $subLayer = $self->_getSubLayerHandle();
290
291			# apply configured modifications
292			if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {
293	joko	1.13	$self->{_COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});
294	cvsjoko	1.1	}
295			if (exists $self->{dbi}->{RaiseError}) {
296	joko	1.13	$self->{_COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};
297	cvsjoko	1.1	}
298			if (exists $self->{dbi}->{PrintError}) {
299	joko	1.13	$self->{_COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};
300	cvsjoko	1.1	}
301			if (exists $self->{dbi}->{HandleError}) {
302	joko	1.13	$self->{_COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};
303	cvsjoko	1.1	}
304
305	joko	1.2	}
306
307			sub deploySchema {
308			my $self = shift;
309	joko	1.5	my $args = shift;
310
311			my $dsn = $self->{locator}->{dbi}->{dsn};
312	joko	1.4
313			$logger->debug( __PACKAGE__ . "->deploySchema( dsn $dsn )" );
314
315	joko	1.2	my $ok;
316	joko	1.8	if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
317	joko	1.4	return unless $self->_initSchema();
318	joko	1.12	$ok = Tangram::Relational->deploy($schema_tangram, $dbh );
319	joko	1.2	$dbh->disconnect();
320			}
321			return $ok;
322			}
323
324			sub retreatSchema {
325	joko	1.4
326	joko	1.2	my $self = shift;
327	joko	1.5	my $dsn = $self->{locator}->{dbi}->{dsn};
328	joko	1.4
329			$logger->debug( __PACKAGE__ . "->retreatSchema( dsn $dsn )" );
330
331	joko	1.2	my $ok;
332	joko	1.8	if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
333	joko	1.4
334			return unless $self->_initSchema();
335
336			#use Data::Dumper; print Dumper($self);
337			$self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");
338
339	joko	1.12	$ok = Tangram::Relational->retreat($schema_tangram, $dbh );
340	joko	1.8
341			# answer "$ok=2" means "maybe" for now - we have to patch this to a constant here because...
342			# - ... Tangram::Relational->retreat doesn't seem to return a valid status
343			# - possible improvement:
344			# - test this by checking for count of tables in database
345			# - problem with this: there may be some left not having been included to the schema
346			# - maybe better: use "->getChildNodes"?
347			$ok = 2;
348
349	joko	1.2	$dbh->disconnect();
350	joko	1.8
351	joko	1.2	}
352			return $ok;
353	joko	1.4	}
354
355			sub rebuildDbAndSchema {
356			my $self = shift;
357			$logger->info( __PACKAGE__ . "->rebuildDbAndSchema()" );
358			my @results;
359
360			# sum up results (bool (0/1)) in array
361			push @results, $self->retreatSchema();
362			push @results, $self->{dataStorageLayer}->dropDb();
363			push @results, $self->{dataStorageLayer}->createDb();
364			push @results, $self->deploySchema();
365
366			# scan array for "bad ones"
367			my $res = 1;
368			map {
369			$res = 0 if (!$_);
370			} @results;
371
372			return $res;
373	joko	1.6	}
374
375			sub getListUnfiltered {
376			my $self = shift;
377			my $nodename = shift;
378			my @results;
379			$logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );
380			# get set of objects from odbms by object name
381	joko	1.13	my $object_set = $self->{_COREHANDLE}->remote($nodename);
382			@results = $self->{_COREHANDLE}->select($object_set);
383	joko	1.6	return \@results;
384			}
385
386			sub getListFiltered {
387			my $self = shift;
388
389			# redirect to unfiltered mode
390			#return $self->getListUnfiltered(@_);
391
392			my $nodename = shift;
393			my $filters = shift;
394			my @results;
395			$logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );
396
397			#print Dumper($filters);
398
399			my @tfilters;
400
401			foreach my $filter (@$filters) {
402
403			# get filter - TODO: for each filter
404			#my $filter = $filters->[0];
405
406			# build filter
407			my $lexpr = $filter->{key};
408			#my $op = $filter->{op};
409			my $op = '=';
410			my $rexpr = $filter->{val};
411			my $tight = 100;
412
413			# my $tfilter = Tangram::Filter->new(
414			# expr => "t1.$lexpr $op '$rexpr'",
415			# tight => $tight,
416			# objects => $objects,
417			# );
418
419			# HACK: build eval-string (sorry) to get filtered list - please give advice here
420			push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
421
422			}
423
424			my $tfilter = join(' & ', @tfilters);
425
426			# get set of objects from odbms by object name
427	joko	1.13	my $remote = $self->{_COREHANDLE}->remote($nodename);
428	joko	1.6
429			# was:
430			#@results = $self->{COREHANDLE}->select($object_set, $tfilter);
431
432			# is:
433			# HACK: build eval-string (sorry) to get filtered list - please give advice here
434	joko	1.13	my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';
435	joko	1.6
436			# get filtered list/set
437			@results = eval($evalstring);
438			die $@ if $@;
439
440			return \@results;
441			}
442
443			sub createCursor {
444			my $self = shift;
445			my $node = shift;
446	joko	1.13	my $cmdHandle = $self->{_COREHANDLE}->cursor($node);
447	joko	1.6	my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );
448			return $result;
449			}
450
451			sub createSet {
452			my $self = shift;
453	joko	1.18	#print "-" x 80, "\n";
454			#print Dumper(@_);
455	joko	1.6	my @objects = @_;
456			my $rh = Set::Object->new();
457			foreach (@objects) {
458	joko	1.18	if (!isEmpty($_)) {
459			#print Dumper($_);
460			$rh->insert($_);
461			}
462	joko	1.6	}
463			#print Dumper($rh->members());
464			my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
465			return $result;
466			}
467
468			sub sendQuery {
469			my $self = shift;
470			my $query = shift;
471			#my $sql = "SELECT cs FROM $self->{metainfo}->{$descent}->{node} WHERE $self->{metainfo}->{$descent}->{IdentProvider}->{arg}='$self->{entry}->{source}->{ident}';";
472			#my $result = $self->{metainfo}->{$descent}->{storage}->sendCommand($sql);
473
474			#print Dumper($query);
475
476			# HACK: special case: querying by id does not translate into a common tangram query
477			# just load the object by given id(ent)
478			if ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq') {
479			#print "LOAD!!!", "\n";
480			#exit;
481			#return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );
482			my $ident = $query->{criterias}->[0]->{val};
483			#print "load obj", "\n";
484			#return $self->createSet() if $ident == 5;
485	joko	1.18	$self->{_COREHANDLE}->unload($ident);
486	joko	1.13	my $object = $self->{_COREHANDLE}->load($ident);
487	joko	1.6	#print "get id", "\n";
488	joko	1.13	my $oid = $self->{_COREHANDLE}->id($object);
489	joko	1.18	#print Dumper($object);
490			#print "oid: $oid", "\n";
491	joko	1.6	return $self->createSet($object);
492			#return $self->createSet( $self->{COREHANDLE}->load('300090018') );
493			}
494
495			die("This should not be reached for now - redirect to \$self->getListFiltered() here!");
496
497			# TODO: do a common tangram query here
498
499			my @crits;
500			foreach (@{$query->{criterias}}) {
501			my $op = '';
502			$op = '=' if lc $_->{op} eq 'eq';
503			push @crits, "$_->{key}$op'$_->{val}'";
504			}
505			my $subnodes = {};
506			map { $subnodes->{$_}++ } @{$query->{subnodes}};
507			# HACK: this is hardcoded ;( expand possibilities!
508			#my $crit = join(' AND ', @crits);
509			#my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit);
510			#return $self->sendCommand($sql);
511			#my $h = $self->{COREHANDLE}->remote($query->{node});
512			#my $res = $self->{COREHANDLE}->select($h, $h->{);
513			return $self->createCursor($query->{node});
514	joko	1.7	}
515
516			sub eraseAll {
517			my $self = shift;
518			my $classname = shift;
519	joko	1.13	my $remote = $self->{_COREHANDLE}->remote($classname);
520			my @objs = $self->{_COREHANDLE}->select($remote);
521			$self->{_COREHANDLE}->erase(@objs);
522	joko	1.8	}
523
524			sub createDb {
525			my $self = shift;
526			my $storage = $self->_getSubLayerHandle();
527			return $storage->createDb();
528	joko	1.9	}
529
530			sub getObject {
531			my $self = shift;
532			my $oid = shift;
533	jonen	1.14	my $options = shift;
534	joko	1.16
535			# TODO: create a deep_unload method (currently _all_ objects are unloaded)
536	jonen	1.14	# unload($oid) will only unload object, not deep object hashes
537	joko	1.17	$self->{_COREHANDLE}->unload() if ($options->{destroy});
538	joko	1.16
539	joko	1.9	# TODO: review this
540			#if (!$self->{COREHANDLE}) { return; }
541	joko	1.16
542			# TODO: review this
543			my $object = eval('$self->{_COREHANDLE}->load($oid);');
544			print $@, "\n" if $@;
545
546			return $object if $object;
547	joko	1.9	}
548
549			sub getObjectAsHash {
550			my $self = shift;
551			my $oid = shift;
552			my $options = shift;
553	jonen	1.14	my $obj = $self->getObject($oid, $options);
554	joko	1.15
555			# build options (a callback to unload autovivified objects) for 'expand'
556			# TODO: use $logger to write to debug here!
557			my $cb; # = sub {};
558			=pod
559			if ($options->{destroy}) {
560			$options->{cb}->{destroy} = sub {
561			print "================ DESTROY", "\n";
562			my $object = shift;
563			#print Dumper($object);
564			$self->{_COREHANDLE}->unload($object);
565			#undef($object);
566			};
567			}
568			=cut
569
570			my $hash = object2hash($obj, $options);
571			#$options->{cb}->{destroy}->($obj);
572			#$self->{_COREHANDLE}->unload($obj);
573
574			# convert values in hash to utf8 to be ready for (e.g.) encapsulation in XML
575			# now done in object2hash
576			#var2utf8($hash) if ($options->{utf8});
577
578			# old (wrong) attempts to get rid of used instances, if requested
579			#$obj->clear_refs;
580			#$self->{COREHANDLE}->unload($obj) if($options->{destroy});
581			#$obj->DESTROY;
582			#undef($obj) if($options->{destroy});
583
584			return $hash;
585	joko	1.12	}
586
587			sub getSchema {
588			return $schema_tangram;
589	joko	1.13	}
590
591			sub getCOREHANDLE {
592			my $self = shift;
593			return $self->{_COREHANDLE};
594	cvsjoko	1.1	}
595
596			1;
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