From: Rob Kinyon <rob.kinyon@gmail.com>
Date: Sun, 14 Feb 2010 17:42:01 +0000 (-0500)
Subject: Apply some changes
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=2ba14e04118fbfa4f41947ac9273b97ca1cb78e2;p=dbsrgits%2FDBM-Deep.git

Apply some changes
---

diff --git a/Build.PL b/Build.PL
index 3df9405..758f756 100644
--- a/Build.PL
+++ b/Build.PL
@@ -1,4 +1,4 @@
-use Module::Build;
+use Module::Build 0.28; # for prepare_metadata
 
 use strict;
 use warnings FATAL => 'all';
diff --git a/lib/DBM/Deep.pm b/lib/DBM/Deep.pm
index 294f5ab..7640810 100644
--- a/lib/DBM/Deep.pm
+++ b/lib/DBM/Deep.pm
@@ -566,14 +566,14 @@ sub CLEAR {
     my $self = shift->_get_self;
     warn "CLEAR($self)\n" if DEBUG;
 
-    unless ( $self->_engine->storage->is_writable ) {
+    my $engine = $self->_engine;
+    unless ( $engine->storage->is_writable ) {
         $self->_throw_error( 'Cannot write to a readonly filehandle' );
     }
 
     $self->lock_exclusive;
 
-    # Dispatch to the specific clearing functionality.
-    $self->_clear;
+    $engine->clear;
 
     $self->unlock;
 
diff --git a/lib/DBM/Deep/Engine.pm b/lib/DBM/Deep/Engine.pm
index f2346b4..84f1a6c 100644
--- a/lib/DBM/Deep/Engine.pm
+++ b/lib/DBM/Deep/Engine.pm
@@ -339,6 +339,31 @@ defined sector type.
 
 sub load_sector { $_[0]->sector_type->load( @_ ) }
 
+=head2 clear
+
+=cut
+
+=head2 clear( $obj )
+
+This takes an object that provides _base_offset() and deletes all its 
+elements, returning nothing.
+
+=cut
+
+sub clear {
+    my $self = shift;
+    my $obj = shift;
+
+    my $sector = $self->_load_sector( $obj->_base_offset )
+        or return;
+
+    return unless $sector->staleness == $obj->_staleness;
+
+    $sector->clear;
+
+    return;
+}
+
 =head2 cache / clear_cache
 
 This is the cache of loaded Reference sectors.