Storage/Handler/Tangram.pm

############################################
#
#  $Id: Tangram.pm,v 1.7 2002/12/01 04:46:19 joko Exp $
#
#  $Log: Tangram.pm,v $
#  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::Abstract");

use Tangram;
use Data::Dumper;
use libp qw( getNewPerlObjectByPkgName );
use Data::Storage::Result::Tangram;
use Data::Compare::Struct qw( isEmpty );

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


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

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

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( $self->{schema_tangram}, $dsn );
  
    # 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();
    $ok = Tangram::Relational->deploy($self->{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");
    
    $ok = Tangram::Relational->retreat($self->{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;
  my @objects = @_;
  my $rh = Set::Object->new();
  foreach (@objects) {
    #print Dumper($_);
    $rh->insert($_) if !isEmpty($_);
  }
  #print Dumper($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;
    my $object = $self->{COREHANDLE}->load($ident);
#print "get id", "\n";
    my $oid = $self->{COREHANDLE}->id($object);
    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 = $self->{storage}->remote($classname);
  my @objs = $self->{storage}->select($remote);
  $self->{COREHANDLE}->erase(@objs);
}

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

1;
1	joko	1.6	############################################
2	cvsjoko	1.1	#
3	joko	1.8	# $Id: Tangram.pm,v 1.7 2002/12/01 04:46:19 joko Exp $
4	joko	1.2	#
5			# $Log: Tangram.pm,v $
6	joko	1.8	# Revision 1.7 2002/12/01 04:46:19 joko
7			# + sub eraseAll
8			#
9	joko	1.7	# Revision 1.6 2002/11/29 05:02:30 joko
10			# - sub getNewPerlObjectByPkgName (moved to libp.pm)
11			# + sub getMetaInfo
12			# - sub existsChildNode (moved to Abstract.pm)
13			# + sub getListUnfiltered
14			# + sub getListFiltered
15			# + sub createCursor
16			# + sub createSet
17			# + sub sendQuery
18			#
19	joko	1.6	# Revision 1.5 2002/11/17 06:35:18 joko
20			# + locator metadata can now be reached via ->{locator}
21			# - getChildNodes is now wrapped via COREHANDLE
22			#
23	joko	1.5	# Revision 1.4 2002/10/25 11:44:44 joko
24			# + sub _initSchema
25			# + sub existsChildNode
26			# + sub testIntegrity
27			# + sub rebuildDbAndSchema
28			#
29	joko	1.4	# Revision 1.3 2002/10/17 03:56:55 joko
30			# + bugfix: trapped eval error
31			#
32	joko	1.3	# Revision 1.2 2002/10/17 00:10:05 joko
33			# + removed dependency from tsobj.pm, schema is now independent
34			# + sub getNewPerlObjectByPkgName
35			# + sub deploySchema
36			# + sub retreatSchema
37			#
38	joko	1.2	# Revision 1.1 2002/10/10 03:44:07 cvsjoko
39			# + new
40	cvsjoko	1.1	#
41	joko	1.6	############################################
42
43	cvsjoko	1.1
44			package Data::Storage::Handler::Tangram;
45
46			use strict;
47			use warnings;
48
49			use base ("Data::Storage::Handler::Abstract");
50
51			use Tangram;
52			use Data::Dumper;
53	joko	1.6	use libp qw( getNewPerlObjectByPkgName );
54			use Data::Storage::Result::Tangram;
55			use Data::Compare::Struct qw( isEmpty );
56	cvsjoko	1.1
57			# get logger instance
58			my $logger = Log::Dispatch::Config->instance;
59
60
61	joko	1.6	sub getMetaInfo {
62			my $self = shift;
63			$logger->debug( __PACKAGE__ . "->getMetaInfo()" );
64			return {
65			'disconnectMethod' => 'disconnect',
66			};
67	joko	1.2	}
68
69	joko	1.4	sub _initSchema {
70			my $self = shift;
71			$logger->debug( __PACKAGE__ . "->_initSchema()" );
72			#if (!$self->{schema_tangram}) {
73	joko	1.5	my $obj = getNewPerlObjectByPkgName($self->{locator}->{schema}, { EXPORT_OBJECTS => $self->{locator}->{classnames}, want_transactions => $self->{locator}->{want_transactions} } );
74	joko	1.4	$self->{schema_tangram} = $obj->getSchema();
75			#}
76			if (!$self->{schema_tangram}) {
77			$logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );
78			return 0;
79			}
80			return 1;
81			}
82
83	cvsjoko	1.1	sub connect {
84
85			my $self = shift;
86
87			my $dsn = shift;
88	joko	1.5	$dsn \|\|= $self->{locator}->{dbi}->{dsn};
89	cvsjoko	1.1
90	joko	1.2	$logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );
91	cvsjoko	1.1
92			#my $storage = Tangram::Relational->connect( $schema, $dsn );
93			#my $storage = Tangram::mysql->connect( $schema, $dsn );
94			#$storage = Tangram::Relational->connect( Project->schema, $dsn );
95
96			# if (!testDsn($dsn)) {
97			# croak("Database at \"$dsn\" is not available");
98			# return;
99			# }
100
101	joko	1.4	return unless $self->_initSchema();
102
103	joko	1.6	# create the main tangram storage object
104	joko	1.2	#$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
105			$self->{COREHANDLE} = Tangram::Relational->connect( $self->{schema_tangram}, $dsn );
106	cvsjoko	1.1
107	joko	1.6	# some attempts for configuring the wrapped underlying dbi.....
108	cvsjoko	1.1	#$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();
109			#$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE();
110			#$self->_configureUnderlyingStorage;
111	joko	1.6
112			# ..... encapsulation wins!
113	cvsjoko	1.1	$self->configureCOREHANDLE();
114
115	joko	1.5	$self->{locator}->{status}->{connected} = 1;
116
117	joko	1.4	return 1;
118
119	cvsjoko	1.1	}
120
121			sub getChildNodes {
122
123			my $self = shift;
124			my @nodes;
125
126	joko	1.4	$logger->debug( __PACKAGE__ . "->getChildNodes()" );
127
128	cvsjoko	1.1	# create new DBI - Data::Storage - object from already connected DBI::db - handle inside the current COREHANDLE
129			#my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} });
130			#my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} );
131	joko	1.6
132			# todo: should we retrieve information from the schema here
133			# rather than poorly getting table names from underlying dbi?
134	cvsjoko	1.1	my $storage = $self->_getSubLayerHandle();
135	joko	1.5	@nodes = @{$storage->getChildNodes()};
136	cvsjoko	1.1	#$storage->_configureCOREHANDLE();
137	joko	1.5	#print "getchildnodes\n";
138			#print Dumper($self);
139	cvsjoko	1.1	#if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {
140
141	joko	1.8	# TODO: REVIEW
142			#$storage->disconnect();
143	cvsjoko	1.1
144	joko	1.4	$self->{meta}->{childnodes} = \@nodes;
145
146	cvsjoko	1.1	return \@nodes;
147
148			}
149
150
151	joko	1.4	sub testIntegrity {
152
153			my $self = shift;
154
155			$logger->debug( __PACKAGE__ . "->testIntegrity()" );
156
157			# 1st test: are there tables?
158			if (!$self->getChildNodes()) {
159			$logger->warning( __PACKAGE__ . "->testIntegrity no childnodes exist" );
160			return;
161			}
162
163			# 2nd test: is there a table named "Tangram"?
164			if (!$self->existsChildNode("Tangram")) {
165			$logger->warning( __PACKAGE__ . "->testIntegrity childnode \"Tangram\" doesn't exist" );
166			return;
167			}
168
169	joko	1.5	$self->{locator}->{status}->{integrity} = 1;
170	joko	1.4	return 1;
171
172			}
173
174
175	cvsjoko	1.1	sub _getSubLayerHandle {
176
177			my $self = shift;
178
179	joko	1.4	$logger->debug( __PACKAGE__ . "->_getSubLayerHandle()" );
180
181	cvsjoko	1.1	#print Dumper($self);
182	joko	1.5
183	cvsjoko	1.1	# hack, make more generic!
184	joko	1.4	if (!$self->{dataStorageLayer}) {
185			$logger->debug( __PACKAGE__ . "->_getSubLayerHandle() creating new dataStorageLayer" );
186			#my $loc = Data::Storage::Locator->new( type => "DBI", dbi => $self->{dbi}, COREHANDLE => $self->{COREHANDLE}->{db} );
187	joko	1.5	my $loc = Data::Storage::Locator->new( { type => "DBI", dbi => $self->{locator}->{dbi} } );
188	joko	1.4	$self->{dataStorageLayer} = Data::Storage->new( $loc, { protected => 1 } );
189	cvsjoko	1.1	#$self->{STORAGE_UNDER_THE_HOOD}->{STORAGEHANDLE}->_configureCOREHANDLE();
190			#$self->{STORAGE_UNDER_THE_HOOD}->_configureCOREHANDLE();
191			}
192
193			#print Dumper($self->{STORAGE_UNDER_THE_HOOD});
194
195	joko	1.4	return $self->{dataStorageLayer};
196	cvsjoko	1.1
197			}
198
199			sub _configureUnderlyingStorage {
200
201			my $self = shift;
202	joko	1.4
203			$logger->debug( __PACKAGE__ . "->_configureUnderlyingStorage" );
204
205	cvsjoko	1.1	$self->_configureCOREHANDLE_DBI();
206			return;
207
208			foreach my $key (keys %{$self->{dbi}}) {
209			my $val = $self->{dbi}->{$key};
210			print "entry: $key; $val", "\n";
211			$self->{COREHANDLE}->{db}->{$key} = $val;
212			}
213			#print Dumper($self->{COREHANDLE}->{db});
214			}
215
216
217			sub configureCOREHANDLE {
218
219			my $self = shift;
220
221	joko	1.4	$logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );
222	cvsjoko	1.1
223			#my $subLayer = $self->_getSubLayerHandle();
224
225			# apply configured modifications
226			if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {
227			$self->{COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});
228			}
229			if (exists $self->{dbi}->{RaiseError}) {
230			$self->{COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};
231			}
232			if (exists $self->{dbi}->{PrintError}) {
233			$self->{COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};
234			}
235			if (exists $self->{dbi}->{HandleError}) {
236			$self->{COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};
237			}
238
239	joko	1.2	}
240
241			sub deploySchema {
242			my $self = shift;
243	joko	1.5	my $args = shift;
244
245			my $dsn = $self->{locator}->{dbi}->{dsn};
246	joko	1.4
247			$logger->debug( __PACKAGE__ . "->deploySchema( dsn $dsn )" );
248
249	joko	1.2	my $ok;
250	joko	1.8	if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
251	joko	1.4	return unless $self->_initSchema();
252			$ok = Tangram::Relational->deploy($self->{schema_tangram}, $dbh );
253	joko	1.2	$dbh->disconnect();
254			}
255			return $ok;
256			}
257
258			sub retreatSchema {
259	joko	1.4
260	joko	1.2	my $self = shift;
261	joko	1.5	my $dsn = $self->{locator}->{dbi}->{dsn};
262	joko	1.4
263			$logger->debug( __PACKAGE__ . "->retreatSchema( dsn $dsn )" );
264
265	joko	1.2	my $ok;
266	joko	1.8	if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
267	joko	1.4
268			return unless $self->_initSchema();
269
270			#use Data::Dumper; print Dumper($self);
271			$self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");
272
273			$ok = Tangram::Relational->retreat($self->{schema_tangram}, $dbh );
274	joko	1.8
275			# answer "$ok=2" means "maybe" for now - we have to patch this to a constant here because...
276			# - ... Tangram::Relational->retreat doesn't seem to return a valid status
277			# - possible improvement:
278			# - test this by checking for count of tables in database
279			# - problem with this: there may be some left not having been included to the schema
280			# - maybe better: use "->getChildNodes"?
281			$ok = 2;
282
283	joko	1.2	$dbh->disconnect();
284	joko	1.8
285	joko	1.2	}
286			return $ok;
287	joko	1.4	}
288
289			sub rebuildDbAndSchema {
290			my $self = shift;
291			$logger->info( __PACKAGE__ . "->rebuildDbAndSchema()" );
292			my @results;
293
294			# sum up results (bool (0/1)) in array
295			push @results, $self->retreatSchema();
296			push @results, $self->{dataStorageLayer}->dropDb();
297			push @results, $self->{dataStorageLayer}->createDb();
298			push @results, $self->deploySchema();
299
300			# scan array for "bad ones"
301			my $res = 1;
302			map {
303			$res = 0 if (!$_);
304			} @results;
305
306			return $res;
307	joko	1.6	}
308
309			sub getListUnfiltered {
310			my $self = shift;
311			my $nodename = shift;
312			my @results;
313			$logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );
314			# get set of objects from odbms by object name
315			my $object_set = $self->{COREHANDLE}->remote($nodename);
316			@results = $self->{COREHANDLE}->select($object_set);
317			return \@results;
318			}
319
320			sub getListFiltered {
321			my $self = shift;
322
323			# redirect to unfiltered mode
324			#return $self->getListUnfiltered(@_);
325
326			my $nodename = shift;
327			my $filters = shift;
328			my @results;
329			$logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );
330
331			#print Dumper($filters);
332
333			my @tfilters;
334
335			foreach my $filter (@$filters) {
336
337			# get filter - TODO: for each filter
338			#my $filter = $filters->[0];
339
340			# build filter
341			my $lexpr = $filter->{key};
342			#my $op = $filter->{op};
343			my $op = '=';
344			my $rexpr = $filter->{val};
345			my $tight = 100;
346
347			# my $tfilter = Tangram::Filter->new(
348			# expr => "t1.$lexpr $op '$rexpr'",
349			# tight => $tight,
350			# objects => $objects,
351			# );
352
353			# HACK: build eval-string (sorry) to get filtered list - please give advice here
354			push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
355
356			}
357
358			my $tfilter = join(' & ', @tfilters);
359
360			# get set of objects from odbms by object name
361			my $remote = $self->{COREHANDLE}->remote($nodename);
362
363			# was:
364			#@results = $self->{COREHANDLE}->select($object_set, $tfilter);
365
366			# is:
367			# HACK: build eval-string (sorry) to get filtered list - please give advice here
368			my $evalstring = 'return $self->{COREHANDLE}->select($remote, ' . $tfilter . ');';
369
370			# get filtered list/set
371			@results = eval($evalstring);
372			die $@ if $@;
373
374			return \@results;
375			}
376
377			sub createCursor {
378			my $self = shift;
379			my $node = shift;
380			my $cmdHandle = $self->{COREHANDLE}->cursor($node);
381			my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );
382			return $result;
383			}
384
385			sub createSet {
386			my $self = shift;
387			my @objects = @_;
388			my $rh = Set::Object->new();
389			foreach (@objects) {
390			#print Dumper($_);
391			$rh->insert($_) if !isEmpty($_);
392			}
393			#print Dumper($rh->members());
394			my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
395			return $result;
396			}
397
398			sub sendQuery {
399			my $self = shift;
400			my $query = shift;
401			#my $sql = "SELECT cs FROM $self->{metainfo}->{$descent}->{node} WHERE $self->{metainfo}->{$descent}->{IdentProvider}->{arg}='$self->{entry}->{source}->{ident}';";
402			#my $result = $self->{metainfo}->{$descent}->{storage}->sendCommand($sql);
403
404			#print Dumper($query);
405
406			# HACK: special case: querying by id does not translate into a common tangram query
407			# just load the object by given id(ent)
408			if ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq') {
409			#print "LOAD!!!", "\n";
410			#exit;
411			#return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );
412			my $ident = $query->{criterias}->[0]->{val};
413			#print "load obj", "\n";
414			#return $self->createSet() if $ident == 5;
415			my $object = $self->{COREHANDLE}->load($ident);
416			#print "get id", "\n";
417			my $oid = $self->{COREHANDLE}->id($object);
418			return $self->createSet($object);
419			#return $self->createSet( $self->{COREHANDLE}->load('300090018') );
420			}
421
422			die("This should not be reached for now - redirect to \$self->getListFiltered() here!");
423
424			# TODO: do a common tangram query here
425
426			my @crits;
427			foreach (@{$query->{criterias}}) {
428			my $op = '';
429			$op = '=' if lc $_->{op} eq 'eq';
430			push @crits, "$_->{key}$op'$_->{val}'";
431			}
432			my $subnodes = {};
433			map { $subnodes->{$_}++ } @{$query->{subnodes}};
434			# HACK: this is hardcoded ;( expand possibilities!
435			#my $crit = join(' AND ', @crits);
436			#my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit);
437			#return $self->sendCommand($sql);
438			#my $h = $self->{COREHANDLE}->remote($query->{node});
439			#my $res = $self->{COREHANDLE}->select($h, $h->{);
440			return $self->createCursor($query->{node});
441	joko	1.7	}
442
443			sub eraseAll {
444			my $self = shift;
445			my $classname = shift;
446			my $remote = $self->{storage}->remote($classname);
447			my @objs = $self->{storage}->select($remote);
448			$self->{COREHANDLE}->erase(@objs);
449	joko	1.8	}
450
451			sub createDb {
452			my $self = shift;
453			my $storage = $self->_getSubLayerHandle();
454			return $storage->createDb();
455	cvsjoko	1.1	}
456
457			1;
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