--- nfo/perl/libs/Data/Storage/Handler/Tangram.pm	2003/04/09 06:07:43	1.33
+++ nfo/perl/libs/Data/Storage/Handler/Tangram.pm	2003/05/13 16:38:38	1.38
@@ -1,8 +1,29 @@
 ############################################
 #
-#  $Id: Tangram.pm,v 1.33 2003/04/09 06:07:43 joko Exp $
+#  $Id: Tangram.pm,v 1.38 2003/05/13 16:38:38 joko Exp $
 #
 #  $Log: Tangram.pm,v $
+#  Revision 1.38  2003/05/13 16:38:38  joko
+#  problems with "tied" on 5.6.1/win32
+#
+#  Revision 1.37  2003/05/10 17:37:39  jonen
+#  corrected last commit
+#
+#  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
+#   - insertChildNode()
+#     # inserts child node at given parent (child node haven't to exists,
+#         createNode will be injected transparently)
+#
+#  Revision 1.35  2003/04/19 16:09:48  jonen
+#  + added operator dispatching (currently for getting ref-type) at 'getListFiltered'
+#
+#  Revision 1.34  2003/04/11 01:18:53  joko
+#  sendQuery:
+#  + introduced crud action 'DELETE'
+#
 #  Revision 1.33  2003/04/09 06:07:43  joko
 #  revamped 'sub sendQuery'
 #
@@ -502,8 +523,14 @@
   #    objects => $objects,
   #  );
   
-    # HACK: build eval-string (sorry) to get filtered list - please give advice here
-    push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
+    # TODO: is_op?
+    # dispatch un-common operators if exists
+    if($filter->{op} eq "ref") {
+      push @tfilters, 'ref($remote->{' . $filter->{key} . '})' . " eq '$filter->{val}'";
+    } else {
+      # HACK: build eval-string (sorry) to get filtered list - please give advice here
+      push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
+    }
 
   }
 
@@ -564,19 +591,20 @@
   # mode = OID|SPECIAL
   my $mode = '';
   my $ident = '';
-  my $action = '';
+  my $crud = '';
   
   
   # dispatch type and mode
   
     # defaults - 1
     if ($query->{options}) {
-      $action = $query->{options}->{action};
+      $crud = $query->{options}->{crud};
+      $crud ||= $query->{options}->{action};
     }
 
     # defaults - 2
     $type ||= 'TRANSPARENT'; 
-    $action ||= 'load';
+    $crud ||= 'RETRIEVE';
 
     if ($query->{options}->{OID}) {
       $type = 'ITEM';
@@ -585,8 +613,13 @@
     
     } elsif (my $guid = $query->{options}->{GUID}) {
       $type = 'TRANSPARENT';
-      $query->{criterias} = [ { key => 'guid', op => 'eq', val => $guid } ];
-    
+      $query->{criterias} = [ { key => 'guid', op => 'eq', val => $guid } ];    
+
+    # if operator is different (dispatcher for 'getListFiltered')
+    } elsif (my $op = $query->{options}->{op}) {
+      $type = 'TRANSPARENT';
+      $query->{criterias} = [ { key => $query->{options}->{meta_label}, op => $op, val => $query->{options}->{meta_value} } ];    
+
     }
   
     # HACK: special case: querying by id does not translate into a common tangram query
@@ -604,6 +637,7 @@
   if ($type eq 'ITEM' && $ident) {
 
     if ($mode eq 'OID') {    
+      # TODO: review this case!
       $result = $self->getObject($ident, $query->{options});
     
     } elsif ($mode eq 'SPECIAL.SYNC') {
@@ -635,7 +669,7 @@
   
   } elsif ($type eq 'TRANSPARENT') {
 
-    if ($action eq 'load') {
+    if ($crud eq 'RETRIEVE') {
 
       my $list = $self->getListFiltered($query->{node}, $query->{criterias});
       #return $self->createSet($object);
@@ -662,14 +696,14 @@
       #my $res = $self->{COREHANDLE}->select($h, $h->{);
       $result = $self->createCursor($query->{node});
 
-    } elsif ($action eq 'save') {
+    } elsif ($crud eq 'UPDATE') {
 
       # Patch current query to be a loader (e.g. change action, remove payload) ...
       my $childquery = deep_copy($query);
-      $childquery->{options}->{action} = 'load';
+      $childquery->{options}->{crud} = 'RETRIEVE';
       delete $childquery->{payload};
 
-      # ... to use it to fetch fresh object using ourselves (sendQuery).
+      # ... to use it to fetch a fresh object using ourselves (sendQuery).
       my $cursor = $self->sendQuery($childquery);
       my $status = $cursor->getStatus();
       my $object = $cursor->getNextEntry();
@@ -681,6 +715,29 @@
       # Execute update operation at orm.
       $self->update($object);
     
+    } elsif ($crud eq 'DELETE') {
+
+      # Patch current query to be a loader (e.g. change action) ...
+      my $childquery = deep_copy($query);
+      $childquery->{options}->{crud} = 'RETRIEVE';
+
+      # ... to use it to fetch a fresh object using ourselves (sendQuery).
+      my $cursor = $self->sendQuery($childquery);
+      my $status = $cursor->getStatus();
+      my $object = $cursor->getNextEntry();
+
+      $self->erase($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;
+
     }
 
   }
@@ -835,5 +892,132 @@
   $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 (seems, only on Linux node's are tied!!)
+    my $tied_node = tied $parent->{$nodename};
+
+    # insert/change child entry at parent
+    #print "reference: " . ref($parent->{$nodename}) . "\n";
+    if(ref($parent->{$nodename}) eq 'ARRAY') {
+      # (seems, only on Linux node's are tied!!)
+      if($tied_node) {
+        # 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 $tied_node; }
+      } else {
+        push @{$parent->{$nodename}}, $child_entry;
+      }
+    }
+    elsif(ref($parent->{$nodename}) eq 'HASH') {
+      if(my $key = $query_args->{hash_key}) {
+        # (seems, only on Linux node's are tied!!)
+        if($tied_node) {
+          # 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 {
+          $parent->{$nodename}->{$key} = $child_entry;
+        }
+      } 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__