Added a method to make it easier to insert schema migration calls.

git-svn-id: https://samskivert.googlecode.com/svn/trunk@1726 6335cc39-0255-0410-8fd6-9bcaacd3b74c

projects/samskivert/src/java/com/samskivert/jdbc/SimpleRepository.java

@@ -66,6 +66,22 @@ public class SimpleRepository extends Repository
     {
         super(provider);
         _dbident = dbident;
+
+        // give the repository a chance to do any schema migration before
+        // things get further underway
+        try {
+            execute(new Operation() {
+                public Object invoke (Connection conn, DatabaseLiaison liaison)
+                    throws SQLException, PersistenceException
+                {
+                    migrateSchema();
+                    return null;
+                }
+            });
+        } catch (PersistenceException pe) {
+            Log.warning("Failure migrating schema [dbident=" + _dbident + "].");
+            Log.logStackTrace(pe);
+        }
     }
 
     /**
@@ -299,6 +315,19 @@ public class SimpleRepository extends Repository
         });
     }
 
+    /**
+     * Derived classes can override this method and perform any schema
+     * migration they might need (using the idempotent {@link JDBCUtil} schema
+     * migration methods). This is called during the repository's constructor
+     * and will thus take place before derived classes (like the {@link
+     * JORARepository} introspect on the schema to match it up to associated
+     * Java classes).
+     */
+    protected void migrateSchema ()
+        throws SQLException, PersistenceException
+    {
+    }
+
     /**
      * Called when we fetch a connection from the provider. This gives
      * derived classes an opportunity to configure whatever internals they