Hi everybody,
I have been struggling with a problem for a few hours now.
Basically, what I am trying to do is set a default value to variable1 in a
first rule. Then executes an other rule that checks the value of variable1
and set variable2 to a specific value under some conditions. Right now, my
rules go like this :
rule "First rule: default"
salience 10
lock-on-active true
when
$myObject : MyObject()
then
modify($myObject) {
setVariable1(defaultValue);
}
end
rule "Second rule"
salience 0
lock-on-active false
when
$myObject : MyObject(variable1 == defaultValue)
then
$myObject.setVariable2(value2);
end
When those rules are executed, an exception is thrown :
org.drools.runtime.rule.ConsequenceException: rule: First rule: default
...
Caused by: java.lang.NullPointerException
When I remove the "modify" in the first rule, the exception is not thrown
but obviously the second rule is not properly executed ...
What is the problem ? What am I doing wrong ?
Thanks for your help!
Vak'
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