1 files changed, 71 insertions, 0 deletions

diff --git a/lib/sqlalchemy/types.py b/lib/sqlalchemy/types.py
new file mode 100644
index 000000000..a138eb4c8
--- /dev/null
+++ b/lib/sqlalchemy/types.py
@@ -0,0 +1,71 @@
+__ALL__ = [
+            'INT', 'CHAR', 'VARCHAR', 'TEXT', 'FLOAT', 'DECIMAL', 
+            'TIMESTAMP', 'DATETIME', 'CLOB', 'BLOB', 'BOOLEAN', 'String', 'Integer', 'Numeric', 'DateTime', 'Binary', 
+            ]
+
+
+class TypeEngineMeta(type):
+    def convert_bind_param(cls, value):
+        return cls.singleton.convert_bind_param(value)
+    def convert_result_value(cls, value):
+        return cls.singleton.convert_result_value(value)
+        
+class TypeEngine(object):
+    __metaclass__ = TypeEngineMeta
+    def get_col_spec(self):
+        raise NotImplementedError()
+    def convert_bind_param(self, value):
+        raise NotImplementedError()
+    def convert_result_value(self, value):
+        raise NotImplementedError()
+
+class NullTypeEngine(TypeEngine):
+    def get_col_spec(self):
+        raise NotImplementedError()
+    def convert_bind_param(self, value):
+        return value
+    def convert_result_value(self, value):
+        return value
+
+class String(TypeEngine):
+    def __init__(self, length):
+        self.length = length
+String.singleton = String(-1)
+
+class Integer(TypeEngine):
+    """integer datatype"""
+    pass
+Integer.singleton = Integer()
+
+class Numeric(TypeEngine):
+    def __init__(self, precision, length):
+        self.precision = precision
+        self.length = length
+Numeric.singleton = Numeric(10, 2)
+
+class DateTime(TypeEngine):
+    pass
+DateTime.singleton = DateTime()
+
+class Binary(TypeEngine):
+    pass
+Binary.singleton = Binary()
+
+class Boolean(TypeEngine):
+    pass
+Boolean.singleton = Boolean()
+
+class FLOAT(Numeric):pass
+class TEXT(String): pass
+class DECIMAL(Numeric):pass
+class INT(Integer):pass
+INTEGER = INT
+class TIMESTAMP(DateTime): pass
+class DATETIME(DateTime): pass
+class CLOB(String): pass
+class VARCHAR(String): pass
+class CHAR(String):pass
+class BLOB(Binary): pass
+class BOOLEAN(Boolean): pass
+
+