[rules-dev] xdrl fixes/enhancements

[Mark Proctor]

On 10/05/2011 09:07, Mark Proctor wrote:
> On 10/05/2011 08:10, Veit Guna wrote:
>> Hi.
>>
>> Any chance that this could be reviewed and maybe integrated into the
>> release?
>>
>> https://jira.jboss.org/browse/JBRULES-2672
> I'm in two minds on this. Edson and I are thinking of changing the xml
> parser to just be:
> <Pattern object-type="xxxx">
> <expr>......</expr>
> <expr>......</expr>
> <expr>......</expr>
> </Pattern>
>
> With any valid  expression allwed in expr, i.e. any combinatino of ||,
> &&, method calls, +, - etc. Which follows what we've done with free-form
> drl.
> Our current approach to normalising expressions in XMl isn't working too
> well, and the more we extropolate that the worse it gets:
> <dro:pattern object-type="String">
> <dro:and-constraint-connective>
> <dro:field-constraint field-name="this">
> <dro:literal-restriction evaluator="!=" value="null"/>
> </dro:field-constraint>
> <dro:field-constraint field-name="this.toLowerCase">
> <dro:literal-restriction evaluator="==" value="true"/>
> </dro:field-constraint>
> </dro:and-constraint-connective>
> <dro:from>
> <dro:expression>fctv_17263.getHeaderValues("X-My-Header");
> </dro:expression>
> </dro:from>
> </dro:pattern>
>
> But I do recognise that you patch might give a lifeline to existing XML
> users....
I should add that I ripped out most of the handler validation 
parent/peer stuff already. This was necessary to get the new compiler 
working, and <expr> actually already works, see DumperTest.
<lhs>
<forall>
<pattern object-type="State">
<field-binding field-name="state" identifier="state" />
</pattern>

<pattern object-type="Person">
<expr>
                status == state
</expr>
<field-binding field-name="likes" identifier="likes" />
</pattern>
</forall>

</lhs>

Mark
> Mark
>
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