Storage/Handler/Tangram.pm

############################################
#
#  $Id: Tangram.pm,v 1.8 2002/12/01 22:25:51 joko Exp $
#
#  $Log: Tangram.pm,v $
#  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::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( var_deref );
use Data::Transform::Encode qw( var2utf8 );


# 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();
}

sub getObject {
  my $self = shift;
  my $oid = shift;
  # TODO: review this
  #if (!$self->{COREHANDLE}) { return; }
  return $self->{COREHANDLE}->load($oid);
}

sub getObjectAsHash {
  my $self = shift;
  my $oid = shift;
  my $options = shift;
  my $obj = $self->getObject($oid);
  my $deref = var_deref($obj);
  var2utf8($deref) if ($options->{utf8});
  return $deref;
}

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