+ return $self->_dellist('parent', @_);
+}
+
+sub TO_JSON { return { %{ shift() } }; }
+
+sub write_cache
+{
+ my $json = DXJSON->new;
+ $json->canonical(isdbg('routecache'));
+
+ my $ta = [ gettimeofday ];
+ my @s;
+ eval {
+ while (my ($k, $v) = each %list) {
+ push @s, "$k:" . $json->encode($v) . "\n";
+ }
+ };
+ if (!$@ && @s) {
+ my $fh = IO::File->new(">$cachefn") or carp("writing $cachefn $!");
+ print $fh $_ for (sort @s);
+ $fh->close;
+ } else {
+ dbg("Route::User::write_cache error '$@'");
+ return;
+ }
+ my $diff = _diffms($ta);
+ dbg("Route::User::write_cache time to write: $diff mS");
+}
+
+sub read_cache
+{
+ my $json = DXJSON->new;
+ $json->canonical(isdbg('routecache'));
+
+ my $ta = [ gettimeofday ];
+ my $count;
+
+ my $fh = IO::File->new("$cachefn") or carp("reading $cachefn $!");
+ while (my $l = <$fh>) {
+ chomp $l;
+ my ($k, $v) = split /:/, $l, 2;
+ $list{$k} = bless $json->decode($v) or carp("json error decoding '$v'");
+ ++$count;
+ }
+ $fh->close if $fh;
+
+ my $diff = _diffms($ta);
+ dbg("Route::User::read_cache time to read $count records from $cachefn : $diff mS");
+}
+
+#
+# generic AUTOLOAD for accessors
+#
+
+sub AUTOLOAD
+{
+ no strict;
+ my ($pkg,$name) = $AUTOLOAD =~ /^(.*)::(\w+)$/;
+ return if $name eq 'DESTROY';
+
+ confess "Non-existant field '$AUTOLOAD'" unless $valid{$name} || $Route::valid{$name};
+
+ # this clever line of code creates a subroutine which takes over from autoload
+ # from OO Perl - Conway
+ *$AUTOLOAD = sub {$_[0]->{$name} = $_[1] if @_ > 1; return $_[0]->{$name}};
+ goto &$AUTOLOAD;
+# *{"${pkg}::$name"} = sub {$_[0]->{$name} = $_[1] if @_ > 1; return $_[0]->{$name}};
+# goto &{"${pkg}::$name"};