--- nfo/perl/libs/Data/Storage/Handler/Tangram.pm 2002/11/17 06:35:18 1.5 +++ nfo/perl/libs/Data/Storage/Handler/Tangram.pm 2002/11/29 05:02:30 1.6 @@ -1,8 +1,18 @@ -################################# +############################################ # -# $Id: Tangram.pm,v 1.5 2002/11/17 06:35:18 joko Exp $ +# $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 @@ -25,8 +35,8 @@ # Revision 1.1 2002/10/10 03:44:07 cvsjoko # + new # -# -################################# +############################################ + package Data::Storage::Handler::Tangram; @@ -37,23 +47,20 @@ 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; -our $metainfo = { - 'disconnectMethod' => 'disconnect', -}; - -sub getNewPerlObjectByPkgName { - my $pkgname = shift; - my $args = shift; - $logger->debug( __PACKAGE__ . "->getNewPerlObjectByPkgName( pkgname $pkgname args $args )" ); - my $evstring = "use $pkgname;"; - eval($evstring); - $@ && $logger->error( __PACKAGE__ . ':' . __LINE__ . " Error in eval $evstring: " . $@ ); - return $pkgname->new($args); +sub getMetaInfo { + my $self = shift; + $logger->debug( __PACKAGE__ . "->getMetaInfo()" ); + return { + 'disconnectMethod' => 'disconnect', + }; } sub _initSchema { @@ -90,12 +97,16 @@ 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; @@ -114,6 +125,9 @@ # 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(); @@ -130,16 +144,6 @@ } -sub existsChildNode { - my $self = shift; - my $nodename = shift; - $logger->debug( __PACKAGE__ . "->getChildNode( nodename $nodename )" ); - $self->getChildNodes() unless $self->{meta}->{childnodes}; - #print Dumper($self->{meta}->{childnodes}); - return grep $nodename, @{$self->{meta}->{childnodes}}; -} - - sub testIntegrity { my $self = shift; @@ -301,4 +305,138 @@ 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}); +} + 1;