X-Git-Url: http://git.kpe.io/?p=clsql.git;a=blobdiff_plain;f=sql%2Finitialize.lisp;h=cc827bb9661677c31726ec126a957b2b18523210;hp=9fad818b05a7ada566e27067ab1cda80d0c8da41;hb=HEAD;hpb=8a8ee2d7d791b7a3efaed06420802a925d16fca3

diff --git a/sql/initialize.lisp b/sql/initialize.lisp
index 9fad818..cc827bb 100644
--- a/sql/initialize.lisp
+++ b/sql/initialize.lisp
@@ -3,13 +3,11 @@
 ;;;; FILE IDENTIFICATION
 ;;;;
 ;;;; Name:          initialize.lisp
-;;;; Purpose:       Initializion routines for backend
-;;;; Programmers:   Kevin M. Rosenberg 
+;;;; Purpose:       Initializion routines for db backend
+;;;; Programmers:   Kevin M. Rosenberg
 ;;;; Date Started:  May 2002
 ;;;;
-;;;; $Id$
-;;;;
-;;;; This file, part of CLSQL, is Copyright (c) 2002-2004 by Kevin M. Rosenberg
+;;;; This file, part of CLSQL, is Copyright (c) 2002-2010 by Kevin M. Rosenberg
 ;;;; and Copyright (c) 1999-2001 by Pierre R. Mai
 ;;;;
 ;;;; CLSQL users are granted the rights to distribute and use this software
@@ -34,25 +32,30 @@
   (mapc #'database-type-load-foreign *loaded-database-types*))
 
 (defvar *default-database-type* nil
-  "Specifies the default type of database.")
+  "Designates the default database type which is initialised by
+  the function INITIALISE-DATABASE-TYPE.")
 
 (defvar *initialized-database-types* nil
-  "Contains a list of database types which have been initialized by calls
-to initialize-database-type.")
+  "A list of database types which have currently been initialised
+by calling INITIALIZE-DATABASE-TYPE.")
 
 (defun initialize-database-type (&key (database-type *default-database-type*))
-  "Initialize the given database-type, if it is not already
-initialized, as indicated by `*initialized-database-types*'."
+  "Initializes the supplied DATABASE-TYPE, if it is not already
+initialized, as indicated by *INITIALIZED-DATABASE-TYPES* and
+returns DATABASE-TYPE. *DEFAULT-DATABASE-TYPE* is set to
+DATABASE-TYPE and, if DATABASE-TYPE has not been initialised, it
+is added to *INITIALIZED-DATABASE-TYPES*. "
   (when (member database-type *initialized-database-types*)
     (return-from initialize-database-type database-type))
-  
-  (let ((system (intern (concatenate 'string 
-			  (symbol-name '#:clsql-)
-			  (symbol-name database-type)))))
+
+  (let ((system (intern (concatenate 'string
+                          (symbol-name '#:clsql-)
+                          (symbol-name database-type)))))
     (when (not (find-package system))
       (asdf:operate 'asdf:load-op system)))
-  
+
   (when (database-initialize-database-type database-type)
     (push database-type *initialized-database-types*)
+    (setf *default-database-type* database-type)
     database-type))