When creating a java condition ending with a semi-colon, loading of the ruleset is successful.
e.g. when creating a rule containing
<java:condition>
true;
</java:condition>
then
ruleBase = RuleBaseLoader.loadFromInputStream(this.getClass().getResourceAsStream( "/myrule.java.drl" ))
does not generate any errors.
Although, when asserting an object in the working memory that leads to the evaluation of that condition, first some output is written to the system out, followed by an exception:
drools/org/MyRuleSet_1136384249796/java/Allow_ProviderA_access_0.java(26)
Syntax error on token ";", delete this token
drools/org/MyRuleSet_1136384249796/java/Allow_ProviderA_access_0.java(26)
Syntax error on token ";", delete this token
java.lang.NoClassDefFoundError: drools/org/MyRuleSet_1136384249796/java/Allow_ProviderA_access_0
at drools.org.MyRuleSet_1136384249796.java.Allow_ProviderA_access_0Invoker$Condition_1Invoker.invoke(Allow_ProviderA_access_0Invoker.java:36)
at org.drools.semantics.java.JavaCondition.isAllowed(JavaCondition.java:172)
at org.drools.reteoo.ConditionNode.assertTuple(ConditionNode.java:154)
at org.drools.reteoo.TupleSource.propagateAssertTuple(TupleSource.java:118)
at org.drools.reteoo.ParameterNode.assertObject(ParameterNode.java:126)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:173)
at org.drools.reteoo.Rete.assertObject(Rete.java:111)
at org.drools.reteoo.RuleBaseImpl.assertObject(RuleBaseImpl.java:193)
at org.drools.reteoo.WorkingMemoryImpl.assertObject(WorkingMemoryImpl.java:373)
at org.drools.reteoo.WorkingMemoryImpl.assertObject(WorkingMemoryImpl.java:348)
If a ; is not allowed in a condition, this problem should be detected when parsing the ruleset.
Bug
Resolved
Minor
condition ending with ; is not considered as wrong when parsing ruleset but generates error when asserting an object
When parsing java rules, java errors are not detected in conditions and actions in a lot of cases and generate errors at runtime.
Examples include referencing undeclared parameters, using methods or classes that are unknown, invalid use of methods (wrong args etc), and many more.