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################################# |
############################################ |
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# $Id$ |
# $Id$ |
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# |
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# $Log$ |
# $Log$ |
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# Revision 1.7 2002/12/01 04:46:19 joko |
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# + sub eraseAll |
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# |
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# Revision 1.6 2002/11/29 05:02:30 joko |
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# - sub getNewPerlObjectByPkgName (moved to libp.pm) |
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# + sub getMetaInfo |
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# - sub existsChildNode (moved to Abstract.pm) |
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# + sub getListUnfiltered |
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# + sub getListFiltered |
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# + sub createCursor |
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# + sub createSet |
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# + sub sendQuery |
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# |
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# Revision 1.5 2002/11/17 06:35:18 joko |
# Revision 1.5 2002/11/17 06:35:18 joko |
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# + locator metadata can now be reached via ->{locator} |
# + locator metadata can now be reached via ->{locator} |
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# - getChildNodes is now wrapped via COREHANDLE |
# - getChildNodes is now wrapped via COREHANDLE |
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# Revision 1.1 2002/10/10 03:44:07 cvsjoko |
# Revision 1.1 2002/10/10 03:44:07 cvsjoko |
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# + new |
# + new |
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# |
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############################################ |
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################################# |
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package Data::Storage::Handler::Tangram; |
package Data::Storage::Handler::Tangram; |
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use Tangram; |
use Tangram; |
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use Data::Dumper; |
use Data::Dumper; |
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use libp qw( getNewPerlObjectByPkgName ); |
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use Data::Storage::Result::Tangram; |
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use Data::Compare::Struct qw( isEmpty ); |
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# get logger instance |
# get logger instance |
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my $logger = Log::Dispatch::Config->instance; |
my $logger = Log::Dispatch::Config->instance; |
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our $metainfo = { |
sub getMetaInfo { |
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'disconnectMethod' => 'disconnect', |
my $self = shift; |
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}; |
$logger->debug( __PACKAGE__ . "->getMetaInfo()" ); |
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return { |
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sub getNewPerlObjectByPkgName { |
'disconnectMethod' => 'disconnect', |
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my $pkgname = shift; |
}; |
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my $args = shift; |
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$logger->debug( __PACKAGE__ . "->getNewPerlObjectByPkgName( pkgname $pkgname args $args )" ); |
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my $evstring = "use $pkgname;"; |
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eval($evstring); |
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$@ && $logger->error( __PACKAGE__ . ':' . __LINE__ . " Error in eval $evstring: " . $@ ); |
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return $pkgname->new($args); |
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} |
} |
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sub _initSchema { |
sub _initSchema { |
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return unless $self->_initSchema(); |
return unless $self->_initSchema(); |
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# create the main tangram storage object |
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#$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn ); |
#$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn ); |
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$self->{COREHANDLE} = Tangram::Relational->connect( $self->{schema_tangram}, $dsn ); |
$self->{COREHANDLE} = Tangram::Relational->connect( $self->{schema_tangram}, $dsn ); |
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# some attempts for configuring the wrapped underlying dbi..... |
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#$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage(); |
#$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage(); |
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#$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE(); |
#$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE(); |
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#$self->_configureUnderlyingStorage; |
#$self->_configureUnderlyingStorage; |
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# ..... encapsulation wins! |
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$self->configureCOREHANDLE(); |
$self->configureCOREHANDLE(); |
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$self->{locator}->{status}->{connected} = 1; |
$self->{locator}->{status}->{connected} = 1; |
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# create new DBI - Data::Storage - object from already connected DBI::db - handle inside the current COREHANDLE |
# create new DBI - Data::Storage - object from already connected DBI::db - handle inside the current COREHANDLE |
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#my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} }); |
#my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} }); |
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#my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} ); |
#my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} ); |
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# todo: should we retrieve information from the schema here |
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# rather than poorly getting table names from underlying dbi? |
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my $storage = $self->_getSubLayerHandle(); |
my $storage = $self->_getSubLayerHandle(); |
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@nodes = @{$storage->getChildNodes()}; |
@nodes = @{$storage->getChildNodes()}; |
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#$storage->_configureCOREHANDLE(); |
#$storage->_configureCOREHANDLE(); |
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} |
} |
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sub existsChildNode { |
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my $self = shift; |
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my $nodename = shift; |
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$logger->debug( __PACKAGE__ . "->getChildNode( nodename $nodename )" ); |
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$self->getChildNodes() unless $self->{meta}->{childnodes}; |
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#print Dumper($self->{meta}->{childnodes}); |
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return grep $nodename, @{$self->{meta}->{childnodes}}; |
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} |
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sub testIntegrity { |
sub testIntegrity { |
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my $self = shift; |
my $self = shift; |
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return $res; |
return $res; |
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} |
} |
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sub getListUnfiltered { |
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my $self = shift; |
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my $nodename = shift; |
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my @results; |
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$logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" ); |
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# get set of objects from odbms by object name |
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my $object_set = $self->{COREHANDLE}->remote($nodename); |
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@results = $self->{COREHANDLE}->select($object_set); |
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return \@results; |
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} |
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sub getListFiltered { |
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my $self = shift; |
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# redirect to unfiltered mode |
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#return $self->getListUnfiltered(@_); |
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my $nodename = shift; |
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my $filters = shift; |
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my @results; |
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$logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" ); |
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#print Dumper($filters); |
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my @tfilters; |
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foreach my $filter (@$filters) { |
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# get filter - TODO: for each filter |
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#my $filter = $filters->[0]; |
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# build filter |
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my $lexpr = $filter->{key}; |
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#my $op = $filter->{op}; |
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my $op = '='; |
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my $rexpr = $filter->{val}; |
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my $tight = 100; |
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# my $tfilter = Tangram::Filter->new( |
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# expr => "t1.$lexpr $op '$rexpr'", |
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# tight => $tight, |
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# objects => $objects, |
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# ); |
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# HACK: build eval-string (sorry) to get filtered list - please give advice here |
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push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'"; |
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} |
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my $tfilter = join(' & ', @tfilters); |
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# get set of objects from odbms by object name |
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my $remote = $self->{COREHANDLE}->remote($nodename); |
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# was: |
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#@results = $self->{COREHANDLE}->select($object_set, $tfilter); |
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# is: |
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# HACK: build eval-string (sorry) to get filtered list - please give advice here |
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my $evalstring = 'return $self->{COREHANDLE}->select($remote, ' . $tfilter . ');'; |
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# get filtered list/set |
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@results = eval($evalstring); |
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die $@ if $@; |
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return \@results; |
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} |
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sub createCursor { |
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my $self = shift; |
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my $node = shift; |
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my $cmdHandle = $self->{COREHANDLE}->cursor($node); |
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my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle ); |
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return $result; |
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} |
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sub createSet { |
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my $self = shift; |
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my @objects = @_; |
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my $rh = Set::Object->new(); |
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foreach (@objects) { |
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#print Dumper($_); |
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$rh->insert($_) if !isEmpty($_); |
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} |
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#print Dumper($rh->members()); |
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my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh ); |
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return $result; |
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} |
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sub sendQuery { |
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my $self = shift; |
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my $query = shift; |
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#my $sql = "SELECT cs FROM $self->{metainfo}->{$descent}->{node} WHERE $self->{metainfo}->{$descent}->{IdentProvider}->{arg}='$self->{entry}->{source}->{ident}';"; |
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#my $result = $self->{metainfo}->{$descent}->{storage}->sendCommand($sql); |
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#print Dumper($query); |
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# HACK: special case: querying by id does not translate into a common tangram query |
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# just load the object by given id(ent) |
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if ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq') { |
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#print "LOAD!!!", "\n"; |
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#exit; |
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#return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) ); |
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my $ident = $query->{criterias}->[0]->{val}; |
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#print "load obj", "\n"; |
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#return $self->createSet() if $ident == 5; |
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my $object = $self->{COREHANDLE}->load($ident); |
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#print "get id", "\n"; |
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my $oid = $self->{COREHANDLE}->id($object); |
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return $self->createSet($object); |
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#return $self->createSet( $self->{COREHANDLE}->load('300090018') ); |
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} |
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die("This should not be reached for now - redirect to \$self->getListFiltered() here!"); |
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# TODO: do a common tangram query here |
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my @crits; |
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foreach (@{$query->{criterias}}) { |
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my $op = ''; |
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$op = '=' if lc $_->{op} eq 'eq'; |
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push @crits, "$_->{key}$op'$_->{val}'"; |
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} |
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my $subnodes = {}; |
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map { $subnodes->{$_}++ } @{$query->{subnodes}}; |
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# HACK: this is hardcoded ;( expand possibilities! |
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#my $crit = join(' AND ', @crits); |
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#my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit); |
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#return $self->sendCommand($sql); |
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#my $h = $self->{COREHANDLE}->remote($query->{node}); |
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#my $res = $self->{COREHANDLE}->select($h, $h->{); |
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return $self->createCursor($query->{node}); |
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} |
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sub eraseAll { |
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my $self = shift; |
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my $classname = shift; |
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my $remote = $self->{storage}->remote($classname); |
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my @objs = $self->{storage}->select($remote); |
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$self->{COREHANDLE}->erase(@objs); |
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} |
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1; |
1; |