Storage/Handler/Tangram.pm

############################################
#
#  $Id: Tangram.pm,v 1.10 2002/12/03 15:53:23 joko Exp $
#
#  $Log: Tangram.pm,v $
#  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;


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 = $self->{COREHANDLE}->remote($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;
}

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