Storage/Handler/Tangram.pm

############################################
#
#  $Id: Tangram.pm,v 1.6 2002/11/29 05:02:30 joko Exp $
#
#  $Log: Tangram.pm,v $
#  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;' ) ) {
  
  $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};
  #my $dsn = $self->{dbi}->{dsn};

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

  my $ok;
  # TODO: is this DBI->connect okay here like it is? regarding errors.....???
  if ( my $dbh = DBI->connect($dsn, '', '', {
                                                      PrintError => 0,
                                                    } ) ) {

    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};
  #my $dsn = $self->{dbi}->{dsn};

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

  my $ok;
  if ( my $dbh = DBI->connect($dsn, '', '', {
                                                      #PrintError => 0,
                                                      #RaiseError => 0,
                                                    } ) ) {

    return unless $self->_initSchema();
    
    #use Data::Dumper; print Dumper($self);
    $self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");
    
    $ok = Tangram::Relational->retreat($self->{schema_tangram}, $dbh );
    $ok = 2;    # answer is "maybe" for now since Tangram::Relational->retreat doesn't seem to return a valid status
                    # idea: 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
    $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);
}

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