[rules-users] Events - Determining the Fact Pattern

[David Boaz]

Hi all,

Is it possible to determine the Pattern that ‘produced’ a given Fact? For
example, assuming we have the following rule and event handler:

rule r1
	when 
		p1:Person(...)
		p2:Person(...)
	then
	...
end

protected class MyAgendaEventHandler extends
	    DefaultAgendaEventListener {

	@Override
	public void
afterActivationFired(org.drools.event.rule.AfterActivationFiredEvent event)
{
		String ruleName = event.getActivation().getRule().getName();
		KnowledgeRuntime knowledgeRuntime = event.getKnowledgeRuntime();
		for (FactHandle factHandle : event.getActivation().getFactHandles()) {
			Object fact = knowledgeRuntime.getObject(factHandle);
			Pattern pattern= ?;
		}
	}
}

Is it possible to determine the Pattern that originate a Person object? If
yes, how the pattern is identified?

Thanks, David
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