--- nfo/perl/libs/Data/Storage/Handler/Tangram.pm	2003/04/19 16:09:48	1.35
+++ nfo/perl/libs/Data/Storage/Handler/Tangram.pm	2003/05/10 17:31:18	1.36
@@ -1,8 +1,14 @@
 ############################################
 #
-#  $Id: Tangram.pm,v 1.35 2003/04/19 16:09:48 jonen Exp $
+#  $Id: Tangram.pm,v 1.36 2003/05/10 17:31:18 jonen Exp $
 #
 #  $Log: Tangram.pm,v $
+#  Revision 1.36  2003/05/10 17:31:18  jonen
+#  + added new functions related to 'create' item
+#   - createNode()
+#     # creates non-persistent 'deep dummy filled' object
+#   -
+#
 #  Revision 1.35  2003/04/19 16:09:48  jonen
 #  + added operator dispatching (currently for getting ref-type) at 'getListFiltered'
 #
@@ -714,6 +720,16 @@
 
       $self->erase($object);
 
+    } elsif ($crud eq 'CREATE') {
+      
+      my $nodename = $query->{node};      
+      my $newnode = $self->createNode($nodename);
+      my $id = $self->{_COREHANDLE}->insert($newnode);
+  
+      print "Saved new node $nodename with GUID $newnode->{guid}, OID '$id': " . Dumper($newnode) . "\n";
+      
+      return $newnode;
+
     }
 
   }
@@ -868,5 +884,122 @@
   $self->{dataStorageLayer}->disconnect();
 }
 
+
+sub createNode {
+  my $self = shift;
+  my $classname = shift;
+
+  my $obj = $classname->new();
+  
+  my $attr_options = Class::Tangram::attribute_options($classname);
+  #print "Attribute Options: " . Dumper($attr_options);
+
+  my $attr_types = Class::Tangram::attribute_types($classname);
+  #print "Attribute Types: " . Dumper($attr_types);
+  
+  foreach(keys %{$attr_types}) {
+    if($attr_types->{$_} eq 'string') {
+      $obj->{$_} = '';
+    } elsif($attr_types->{$_} eq 'int') {
+      $obj->{$_} = 0;
+    } elsif($attr_types->{$_} eq 'real') {
+      $obj->{$_} = 0;
+    } elsif($attr_types->{$_} eq 'rawdatetime') {
+      $obj->{$_} = '0000-00-00 00:00:00';
+    } elsif($attr_types->{$_} eq 'ref') {
+      if($attr_options->{$_}->{class}) {
+        $obj->{$_} = $self->createNode($attr_options->{$_}->{class});
+      } else {
+        #$obj->{$_} = undef();
+      }
+    } elsif($attr_types->{$_} eq 'iarray') {
+        $obj->{$_} = [ ];
+    } elsif($attr_types->{$_} eq 'hash') {
+        $obj->{$_} = {  };
+    } elsif($attr_types->{$_} eq 'flat_hash') {
+        $obj->{$_} = { };
+    }
+  }
+  
+  #print "New Object: " . Dumper($obj);
+  
+  return $obj;
+}
+
+
+  sub insertChildNode {
+    my $self = shift;
+    my $child_entry = shift;
+    my $query_args = shift;
+    
+    my $core = $self->{_COREHANDLE};
+    my $nodename = $query_args->{nodename};
+    
+    # get parent object
+    my $query = {
+          node => $query_args->{parent}->{nodename},
+          options => { GUID => $query_args->{parent}->{guid}, },
+          };
+    my $cursor = $self->sendQuery($query);
+    my $parent = $cursor->getNextEntry();
+
+    # debug
+    #print "Parent_org: " . Dumper($parent);
+        
+    # Create child node object if isn't already done 
+    # ($child_entry have to be the class name then...)
+    if(!ref($child_entry)) {
+      $child_entry = $self->createNode($child_entry);
+      # it could be insert 'manually' or will be insert 'transparent' if parent will be updated
+      #$core->insert($child_entry);
+      #print "Create child object [$nodename]: " . Dumper($child_entry);
+    }
+
+    # get reference of tied node
+    my $tied_node = tied $parent->{$nodename};
+
+    # insert/change child entry at parent
+    #print "reference: " . ref($parent->{$nodename}) . "\n";
+    if(ref($parent->{$nodename}) eq 'ARRAY') {
+      # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type,
+      # so a 'PUSH' is not implemented (which could be then done transparently)
+      my $array = $tied_node->FETCH;
+      push @$array, $child_entry;
+      $tied_node->STORE($array);
+      # node will be normaly untied at 'STORE'
+      if(tied $parent->{$nodename}) { print "already tied !!\n"; }
+      else { undef $tied_node; }
+    }
+    elsif(ref($parent->{$nodename}) eq 'HASH') {
+      if(my $key = $query_args->{hash_key}) {
+        # same problem as with 'ARRAY':
+        # all tangram types are tied as 'SCALAR' with special 'FETCH', 'STORE' methods per type.
+        my $hash = $tied_node->FETCH;
+        $hash->{$key} = $child_entry;
+        $tied_node->STORE($hash); 
+        # node will be normaly untied at 'STORE'
+        if(tied $parent->{$nodename}) { print "already tied !!\n"; }
+        else { undef $tied_node; }
+      } else {
+       print "ERROR: No HASH KEY given, so not able to insert hash entry!";
+      }
+    } 
+    else {
+      $parent->{$nodename} = $child_entry;
+    }
+
+    # debug
+    #print "Parent_new: " . Dumper($parent);
+    
+    # save parent
+    $core->update($parent);
+    
+    # debug
+    #print "Saved Parent: ". Dumper($parent);
+    
+    return $child_entry;
+  }
+
+
 1;
 __END__