Storage/Handler/Tangram.pm

############################################
#
#  $Id: Tangram.pm,v 1.12 2002/12/04 11:34:49 joko Exp $
#
#  $Log: Tangram.pm,v $
#  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( var_deref );
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;
  }
  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( $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;
  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 = $self->{_COREHANDLE}->remote($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 $oid = shift;
  # TODO: review this
  #if (!$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});
  undef($obj) if($options->{destroy});
  return $deref;
}

sub getSchema {
  return $schema_tangram;
}

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

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