r3 - 09 Jan 2007 - 00:00:00 - MoinMoin?You are here: TWiki > ABCD Web > SoftwareRequirements
Things that need to be included in the software design of the PyWrapper?:
Support for several DBMS with different SQL Syntax
develop abstraction layer: database modules
Dynamic SQL needed.
Graph representation of the database tables.
Output +/- directly to stream in contrast to keep all output in memory first. This is needed for good perfomance for larger results.
This disqualifies the creation of a single DOM object as the result
Validation of resulting XML according to custom XML Schemas on the fly.
This requires the usage of DOM objects as the result. To still allow streaming of the result, a DOM object could be created per "record" which could be validated +/- properly and then streamed.
XML Schema parsing to create "Response Structure" objects.
objects representing xml schemas. PyWrapper? CMF objects are reused for this. The response structure objects represent the entire potential space of valid xml documents based on a schema. There are classes representing XML Attributes, Elements and Choices which can be serialized to enhance performance.