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2003-04-29 Bernhard Herzog <[email protected]> |
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Next step of table implementation. Introduce a transient database |
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using SQLite that some of the data is copied to on demand. This |
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allows us to do joins and other operations that require an index |
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for good performance with reasonable efficiency. Thuban now needs |
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SQLite 2.8.0 and pysqlite 0.4.1. Older versions may work but I |
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haven't tested that. |
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* Thuban/Model/transientdb.py: New. Transient database |
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implementation. |
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* test/test_transientdb.py: New. Tests for the transient DB |
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classes. |
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* Thuban/Model/session.py (AutoRemoveFile, AutoRemoveDir): New |
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classes to help automatically remove temporary files and |
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directories. |
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(Session.__init__): New instance variables temp_dir for the |
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temporary directory and transient_db for the SQLite database |
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(Session.temp_directory): New. Create a temporary directory if not |
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yet done and return its name. Use AutoRemoveDir to have it |
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automatically deleted |
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(Session.TransientDB): Instantiate the transient database if not |
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done yet and return it. |
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* Thuban/Model/data.py (ShapefileStore.__init__): Use an |
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AutoTransientTable so that data is copied to the transient DB on |
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demand. |
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(SimpleStore): New class that simply combines a table and a |
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shapefile |
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* Thuban/Model/table.py (Table, DBFTable): Rename Table into |
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DBFTable and update its doc-string to reflect the fact that this |
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is only the table interface to a DBF file. Table is now an alias |
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for DBFTable for temporary backwards compatibility. |
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* Thuban/UI/application.py (ThubanApplication.OnExit): Make sure |
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the last reference to the session goes away so that the temporary |
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files are removed properly. |
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* test/test_load.py (LoadSessionTest.tearDown): Remove the |
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reference to the session to make sure the temporary files are |
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removed. |
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2003-04-29 Bernhard Herzog <[email protected]> |
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* Thuban/Model/load.py (XMLReader.__init__, XMLReader.read): Turn |
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the __parser instance variable into a normal local variable in |
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read. It's only used there and read will never be called more than |
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once. Plus it introduces a reference cycle that keeps can keep the |
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session object alive for a long time. |
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2003-04-25 Jonathan Coles <[email protected]> |
2003-04-25 Jonathan Coles <[email protected]> |
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* Thuban/Model/proj.py (Projection): Removed Set*() methods to make |
* Thuban/Model/proj.py (Projection): Removed Set*() methods to make |
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