Refactored to _descend to fix the recursion bug

[dbsrgits/DBM-Deep.git] / lib / DBM / Deep / Engine.pm

diff --git a/lib/DBM/Deep/Engine.pm b/lib/DBM/Deep/Engine.pm
index 0419be7..5d9b034 100644 (file)
--- a/lib/DBM/Deep/Engine.pm
+++ b/lib/DBM/Deep/Engine.pm
@@ -381,5 +381,40 @@ sub storage { $_[0]{storage} }
 
 sub sector_type { die "sector_type must be implemented in a child class" }
 
+# This code is to make sure we write all the values in the $value to the
+# disk and to make sure all changes to $value after the assignment are
+# reflected on disk. This may be counter-intuitive at first, but it is
+# correct dwimmery.
+#   NOTE - simply tying $value won't perform a STORE on each value. Hence,
+# the copy to a temp value.
+sub _descend {
+    my $self = shift;
+    my ($value, $value_sector) = @_;
+    my $r = Scalar::Util::reftype( $value ) || '';
+
+    if ( $r eq 'ARRAY' ) {
+        my @temp = @$value;
+        tie @$value, 'DBM::Deep', {
+            base_offset => $value_sector->offset,
+            staleness   => $value_sector->staleness,
+            storage     => $self->storage,
+            engine      => $self,
+        };
+        @$value = @temp;
+        bless $value, 'DBM::Deep::Array' unless Scalar::Util::blessed( $value );
+    }
+    elsif ( $r eq 'HASH' ) {
+        my %temp = %$value;
+        tie %$value, 'DBM::Deep', {
+            base_offset => $value_sector->offset,
+            staleness   => $value_sector->staleness,
+            storage     => $self->storage,
+            engine      => $self,
+        };
+        %$value = %temp;
+        bless $value, 'DBM::Deep::Hash' unless Scalar::Util::blessed( $value );
+    }
+}
+
 1;
 __END__