mirror of
https://github.com/sqlalchemy/sqlalchemy.git
synced 2026-06-02 05:48:52 -04:00
Mike Bayer
100 lines
2.9 KiB
Python
100 lines
2.9 KiB
Python
# types.py
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# Copyright (C) 2005 Michael Bayer mike_mp@zzzcomputing.com
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with this library; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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__ALL__ = [
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'INT', 'CHAR', 'VARCHAR', 'TEXT', 'FLOAT', 'DECIMAL',
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'TIMESTAMP', 'DATETIME', 'CLOB', 'BLOB', 'BOOLEAN', 'String', 'Integer', 'Numeric', 'DateTime', 'Binary', 'Boolean'
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]
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class TypeEngine(object):
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def get_col_spec(self, typeobj):
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raise NotImplementedError()
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def convert_bind_param(self, value):
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raise NotImplementedError()
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def convert_result_value(self, value):
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raise NotImplementedError()
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def adapt(self, typeobj):
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return typeobj()
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def adapt_args(self):
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return self
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def adapt_type(typeobj, colspecs):
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if type(typeobj) is type:
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typeobj = typeobj()
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typeobj = typeobj.adapt_args()
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t = typeobj.__class__
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for t in t.__mro__[0:-1]:
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try:
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return typeobj.adapt(colspecs[t])
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except KeyError, e:
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pass
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return typeobj.adapt(typeobj.__class__)
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class NullTypeEngine(TypeEngine):
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def get_col_spec(self, typeobj):
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raise NotImplementedError()
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def convert_bind_param(self, value):
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return value
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def convert_result_value(self, value):
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return value
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class String(TypeEngine):
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def __init__(self, length = None):
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self.length = length
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def adapt(self, typeobj):
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return typeobj(self.length)
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def adapt_args(self):
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if self.length is None:
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return TEXT()
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else:
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return self
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class Integer(TypeEngine):
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"""integer datatype"""
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pass
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class Numeric(TypeEngine):
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def __init__(self, precision = 10, length = 2):
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self.precision = precision
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self.length = length
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def adapt(self, typeobj):
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return typeobj(self.precision, self.length)
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class DateTime(TypeEngine):
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pass
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class Binary(TypeEngine):
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pass
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class Boolean(TypeEngine):
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pass
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class FLOAT(Numeric):pass
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class TEXT(String):pass
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class DECIMAL(Numeric):pass
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class INT(Integer):pass
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INTEGER = INT
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class TIMESTAMP(DateTime): pass
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class DATETIME(DateTime): pass
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class CLOB(String): pass
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class VARCHAR(String): pass
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class CHAR(String):pass
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class BLOB(Binary): pass
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class BOOLEAN(Boolean): pass
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