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# This file is part of GNU Enterprise. |
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# GNU Enterprise is free software; you can redistribute it |
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# and/or modify it under the terms of the GNU General Public |
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# License as published by the Free Software Foundation; either |
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# version 2, or (at your option) any later version. |
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# |
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# GNU Enterprise is distributed in the hope that it will be |
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# useful, but WITHOUT ANY WARRANTY; without even the implied |
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# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
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# PURPOSE. See the GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public |
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# License along with program; see the file COPYING. If not, |
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# write to the Free Software Foundation, Inc., 59 Temple Place |
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# - Suite 330, Boston, MA 02111-1307, USA. |
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# Copyright 2000-2003 Free Software Foundation |
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# |
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# FILE: |
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# GConnection.py |
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# DESCRIPTION: |
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# NOTES: |
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# Old methods in GDataObjects and their new counterparts: |
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# * getSchemaTypes() --> types |
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# * getSchemaList() --> find(type='...') |
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# * getSchemaByName() --> find(name='...') |
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# * writeSchema() --> write() |
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# |
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# Preferred way to access these discovery routines is: |
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# connection.schema.<function> |
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# |
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import string |
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# |
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# Schema (metadata) functions |
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# |
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class Introspection: |
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def __init__(self, connection): |
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self._connection = connection |
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# Return a list of the types of Schema objects this driver provides |
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# Contains tuples of (key, description, dataSource??) |
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# dataSource?? is true if this schema type can be a datasource |
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types = [] |
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# Return a list of Schema objects |
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def find(self, name=None, type=None): |
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return [] |
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def findfirst(self, *args, **parms): |
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return self.find(*args, **parms)[0] |
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# write Schema to Database |
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def write(self,obj,overwrite=0): |
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tmsg = _("This database adapter doesn't have 'schema writing' support") |
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raise NoWriteSchemaSupport, tmsg |
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# Used by the introspection classes |
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class Schema: |
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def __init__(self, attrs={}, getChildSchema=None): |
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self.name = '' |
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self.type = '' |
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self.__dict__.update(attrs) |
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if getChildSchema != None: |
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self.getChildSchema = getChildSchema |
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def __cmp__(self, other): |
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if not isinstance(other, Schema): |
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return 1 |
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elif id(other) == id(self): |
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return 0 |
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else: |
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return cmp(string.lower(self.name), string.lower(other.name)) or 1 |
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def getChildSchema(self, parent): |
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return () |
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