Storage/Handler/Tangram.pm

############################################
#
#  $Id: Tangram.pm,v 1.11 2002/12/04 08:54:08 jonen Exp $
#
#  $Log: Tangram.pm,v $
#  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::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 );
  
    # 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;
}

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