--- /dev/null
+# -*- coding: utf-8 -*-
+##############################################################################
+#
+# mojo, a Python library for implementing document based databases
+# Copyright (C) 2013-2014 by Javier Sancho Fernandez <jsf at jsancho dot org>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+##############################################################################
+
+class SQLGeneric(object):
+ def sql(self):
+ return ""
+
+
+class Query(SQLGeneric):
+ def __init__(self, fields, tables, constraints):
+ self.fields = fields
+ self.tables = tables
+ self.constraints = constraints
+
+
+class Field(SQLGeneric):
+ def __init__(self, table, field_name):
+ self.table = table
+ self.field_name = field_name
+
+
+class Table(SQLGeneric):
+ def __init__(self, db_name, table_name):
+ self.db_name = db_name
+ self.table_name = table_name
+
+
+class Constraint(SQLGeneric):
+ def __init__(self, operator, *args):
+ self.operator = operator
+ self.args = args
+
+class Literal(SQLGeneric):
+ def __init__(self, value):
+ self.value = value