From 25feb0393f8c8a1e9e0e0edf369b10b318a60599 Mon Sep 17 00:00:00 2001
From: Constantin Michael <constantin@codesynthesis.com>
Date: Thu, 27 Oct 2011 15:54:35 +0200
Subject: Implement query image change callback machinery

---
 odb/relational/header.hxx        |  7 +++++++
 odb/relational/oracle/header.cxx | 13 +++++++++++++
 odb/relational/oracle/source.cxx |  8 ++++++++
 odb/relational/source.hxx        |  7 +++++++
 4 files changed, 35 insertions(+)

diff --git a/odb/relational/header.hxx b/odb/relational/header.hxx
index a331b3f..53ff93a 100644
--- a/odb/relational/header.hxx
+++ b/odb/relational/header.hxx
@@ -88,6 +88,11 @@ namespace relational
       }
 
       virtual void
+      image_extra (type&)
+      {
+      }
+
+      virtual void
       traverse (type& c)
       {
         os << "struct image_type";
@@ -106,6 +111,8 @@ namespace relational
         if (!composite (c))
           os << "std::size_t version;";
 
+        image_extra (c);
+
         os << "};";
       }
 
diff --git a/odb/relational/oracle/header.cxx b/odb/relational/oracle/header.cxx
index 1e9e850..acbefef 100644
--- a/odb/relational/oracle/header.cxx
+++ b/odb/relational/oracle/header.cxx
@@ -16,6 +16,19 @@ namespace relational
     {
       namespace relational = relational::header;
 
+      struct image_type: relational::image_type, context
+      {
+        image_type (base const& x): base (x) {};
+
+        virtual void
+        image_extra (type& c)
+        {
+          if (options.generate_query () && !composite (c))
+            os << "oracle::change_callback change_callback;";
+        }
+      };
+      entry<image_type> image_type_;
+
       struct image_member: relational::image_member, member_base
       {
         image_member (base const& x)
diff --git a/odb/relational/oracle/source.cxx b/odb/relational/oracle/source.cxx
index a22c235..3383b6f 100644
--- a/odb/relational/oracle/source.cxx
+++ b/odb/relational/oracle/source.cxx
@@ -866,6 +866,14 @@ namespace relational
         }
 
         virtual void
+        init_image_pre (type& c)
+        {
+          if (options.generate_query () && !composite (c))
+            os << "if (i.change_callback.callback != 0)"
+               << "(i.change_callback.callback) (i.change_callback.context);";
+        }
+
+        virtual void
         init_value_extra ()
         {
           os << "sts.find_statement ().stream_result ();";
diff --git a/odb/relational/source.hxx b/odb/relational/source.hxx
index a82fe6a..6296f74 100644
--- a/odb/relational/source.hxx
+++ b/odb/relational/source.hxx
@@ -2182,6 +2182,11 @@ namespace relational
       }
 
       virtual void
+      init_image_pre (type&)
+      {
+      }
+
+      virtual void
       init_value_extra ()
       {
       }
@@ -2413,6 +2418,8 @@ namespace relational
           os << "assert (sk != statement_update);"
              << endl;
 
+        init_image_pre (c);
+
         os << "bool grew (false);"
            << endl;
 
-- 
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