--- nfo/perl/libs/Data/Storage/Handler/Tangram.pm	2003/03/27 15:31:14	1.30
+++ nfo/perl/libs/Data/Storage/Handler/Tangram.pm	2003/04/05 21:24:09	1.31
@@ -1,8 +1,11 @@
 ############################################
 #
-#  $Id: Tangram.pm,v 1.30 2003/03/27 15:31:14 joko Exp $
+#  $Id: Tangram.pm,v 1.31 2003/04/05 21:24:09 joko Exp $
 #
 #  $Log: Tangram.pm,v $
+#  Revision 1.31  2003/04/05 21:24:09  joko
+#  modified 'sub getChildNodes': now contains code from 'querySchema'
+#
 #  Revision 1.30  2003/03/27 15:31:14  joko
 #  fixes to modules regarding new namespace(s) below Data::Mungle::*
 #
@@ -231,33 +234,61 @@
 sub getChildNodes {
 
   my $self = shift;
-  my @nodes;
+  my $mode = shift;
+  $mode ||= 'core';
+  
+  $logger->debug( __PACKAGE__ . "->getChildNodes($mode)" );
 
-  $logger->debug( __PACKAGE__ . "->getChildNodes()" );
+  if ($mode eq 'core') {
 
-  # 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} );
+    my @nodes;
+    
+    # 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;
   
-  # 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 = $self->sendCommand( 'SHOW TABLES;' ) ) {
+  } elsif ($mode eq 'root') {
+    
+    # FIXME: this will return *all* known classes to 'Class::Tangram',
+    # which might not be what you expect since more than one instance
+    # of Tangram may be in memory and Class::Tangram seems to 
+    # offer no methods to determine this or filter its result(s) according
+    # to a specific database.
+    my @object_names = Class::Tangram::known_classes();
+    my @concret_names;
+    my $o_cnt;
+    foreach (sort @object_names) {
+      push @concret_names, $_  if (!Class::Tangram::class_is_abstract($_));
+      $o_cnt++;
+    }
   
-  # TODO: REVIEW
-  #$storage->disconnect();
+    my $result = {
+      all => \@object_names,
+      concrete => \@concret_names,
+    };
+    return $result;
   
-  $self->{meta}->{childnodes} = \@nodes;
+  }
   
-  return \@nodes;
 
 }
 
-
 sub testIntegrity {
 
   my $self = shift;