From 3324b02df620784d3346aa87b3e1cea5e5018008 Mon Sep 17 00:00:00 2001
From: jlaine <jlaine@e071eeec-0327-468d-9b6a-08194a12b294>
Date: Mon, 11 Apr 2011 07:50:03 +0000
Subject: [PATCH] start splitting code to an actual backend

git-svn-id: https://svn.bolloretelecom.eu/opensource/django-ldapdb/trunk@1013 e071eeec-0327-468d-9b6a-08194a12b294
---
 ldapdb/backends/__init__.py      |  0
 ldapdb/backends/ldap/__init__.py |  0
 ldapdb/backends/ldap/compiler.py | 84 ++++++++++++++++++++++++++++++++
 3 files changed, 84 insertions(+)
 create mode 100644 ldapdb/backends/__init__.py
 create mode 100644 ldapdb/backends/ldap/__init__.py
 create mode 100644 ldapdb/backends/ldap/compiler.py

diff --git a/ldapdb/backends/__init__.py b/ldapdb/backends/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/ldapdb/backends/ldap/__init__.py b/ldapdb/backends/ldap/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/ldapdb/backends/ldap/compiler.py b/ldapdb/backends/ldap/compiler.py
new file mode 100644
index 0000000..ab17bd4
--- /dev/null
+++ b/ldapdb/backends/ldap/compiler.py
@@ -0,0 +1,84 @@
+# -*- coding: utf-8 -*-
+# 
+# django-ldapdb
+# Copyright (c) 2009-2010, Bolloré telecom
+# All rights reserved.
+# 
+# See AUTHORS file for a full list of contributors.
+# 
+# Redistribution and use in source and binary forms, with or without modification,
+# are permitted provided that the following conditions are met:
+# 
+#     1. Redistributions of source code must retain the above copyright notice, 
+#        this list of conditions and the following disclaimer.
+#     
+#     2. Redistributions in binary form must reproduce the above copyright 
+#        notice, this list of conditions and the following disclaimer in the
+#        documentation and/or other materials provided with the distribution.
+# 
+#     3. Neither the name of Bolloré telecom nor the names of its contributors
+#        may be used to endorse or promote products derived from this software
+#        without specific prior written permission.
+# 
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+class SQLCompiler(object):
+    def __init__(self, query, connection, using):
+        self.query = query
+        self.connection = connection
+        self.using = using
+
+    def results_iter(self):
+        if self.query.select_fields:
+            fields = self.query.select_fields
+        else:
+            fields = self.query.model._meta.fields
+
+        attrlist = [ x.db_column for x in fields if x.db_column ]
+
+        try:
+            vals = self.connection.search_s(
+                self.query.model.base_dn,
+                self.query.model.search_scope,
+                filterstr=self.query._ldap_filter(),
+                attrlist=attrlist,
+            )
+        except ldap.NO_SUCH_OBJECT:
+            return
+
+        # perform sorting
+        if self.query.extra_order_by:
+            ordering = self.query.extra_order_by
+        elif not self.query.default_ordering:
+            ordering = self.query.order_by
+        else:
+            ordering = self.query.order_by or self.query.model._meta.ordering
+        def cmpvals(x, y):
+            for fieldname in ordering:
+                if fieldname.startswith('-'):
+                    fieldname = fieldname[1:]
+                    negate = True
+                else:
+                    negate = False
+                field = self.query.model._meta.get_field(fieldname)
+                attr_x = field.from_ldap(x[1].get(field.db_column, []), connection=self.connection)
+                attr_y = field.from_ldap(y[1].get(field.db_column, []), connection=self.connection)
+                # perform case insensitive comparison
+                if hasattr(attr_x, 'lower'):
+                    attr_x = attr_x.lower()
+                if hasattr(attr_y, 'lower'):
+                    attr_y = attr_y.lower()
+                val = negate and cmp(attr_y, attr_x) or cmp(attr_x, attr_y)
+                if val:
+                    return val
+            return 0
-- 
2.30.2