[rules-users] Accessing FactField Metadata

[pcourtney]

Davide,

 

Thanks for your responses and for re-opening the JIRA.

 

Although I get warnings about accessing FieldDefinition and
AnnotationDefinition due to restriction on the
drools-core-5.4.0.Final.jar library, it does work to cast FactField to
FieldDefinition and use its methods to access the AnnotationDefinitions.

 

Regarding your other suggestion, I was able to use Java reflection to
get the FactType annotations (factType.getFactClass().getAnnotations()).
However, I was not able to use Java reflection to obtain the field
annotations. I successfully used
factType.getFactClass().getDeclaredFields() to get the Fields. But then
using field.getClass().getAnnotations() on each Field did not return any
annotations. Using the debugger, I can see that the
factType.definedClass.declaredFields.referent[0].annotations variable is
not null and is null for referent[1] and referent[2] where each referent
is a Field. I do not know how to interpret the contents of the Field's
annotations variable, but at least it is not null for the first Field
which seems correct since I have a DRL field annotation on the first
field and not on the next 2. 

 

Thanks again for your help.

Phil

 

From: Davide Sottara [via Drools]
[mailto:ml-node+s46999n4019373h56 at n3.nabble.com] 
Sent: Thursday, August 23, 2012 1:29 PM
To: Courtney, Phil
Subject: Re: Accessing FactField Metadata

 

Phil, 
also consider that getDefinedClass().getAnnotations() will give you the
>>JAVA<< annotations. 
Any custom Drools metadata which is not mapped into a java annotation
(e.g. @role) will not 
be visible from there. 

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