Does Drools imply null checks before trying to read a value in JBoss BRMS 5.3.1

Issue

• In rules we have often the following condition statement:

fact.subfact.attribute = ''MyValue''

• As subfact and attribute are objects they potentially could be NULL, a check is required to avoid NullPointerExceptions.
• Are these conditions added during generation by default or do we have to add them in the rule definition, like

fact.subfact != null, fact.subfact.attribute != null, fact.subfact.attribute = ''MyValue''