kelvin goodson wrote:
If you are discounting using XSD for the source of metadata to
describe the SDO types then there is the SDO API provided for dynamic
metadata creation. The sample at [1] gives an introduction to this.
The paper at [2] discusses the subject also, and the program
underlying the discussion in the paper is at [3] (no change
monitoring) and [4] (with change monitoring).
You say that you want to write the minimum code. There is a quick and
simple Tuscany API for simple cases that you could use instead (See
the MetaDataBuilder inner class in [5]). Whilst the code to create
the type system with this project specific API is simple to understand
and implement it has some drawbacks. We don't have a sample program
for this, but I believe the DAS uses it) I'm happy to discuss further
if you want some more insight into this.
Kelvin.
[1]
http://svn.apache.org/repos/asf/incubator/tuscany/java/sdo/sample/src/main/java/org/apache/tuscany/samples/sdo/intermediate/DynamicCustomerTypeSample.java
[2] http://java.sys-con.com/read/358059_2.htm
[3]
http://svn.apache.org/repos/asf/incubator/tuscany/java/sdo/sample/src/main/java/org/apache/tuscany/samples/sdo/advanced/MedicalScenario.java
[4]
http://svn.apache.org/repos/asf/incubator/tuscany/java/sdo/sample/src/main/java/org/apache/tuscany/samples/sdo/advanced/MedicalScenarioWithChangeMonitoring.java
[5]
http://svn.apache.org/repos/asf/incubator/tuscany/java/sdo/lib/src/main/java/org/apache/tuscany/sdo/api/SDOHelper.java
Thanks.
Follow-up questions:
- Is there an SDO Helper that can introspect my handwritten Item Java
class and drive the calls to the TypeHelper APIs? If not, can I add one?
- I see that I can associate a class with a type, does it have to be an
interface or can it be a class?
- If it can be a class do I really need a factory class or is the SDO
runtime able to instantiate the class?
- I see methods like getStaticType on generated SDOs, do I need to
implement that method in my handwritten SDO and why?
--
Jean-Sebastien
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