[jboss-jira] [JBoss JIRA] Reopened: (JBAOP-348) NPE on ConstructorCallMatcher

NPE on ConstructorCallMatcher ----------------------------- Key: JBAOP-348 URL: http://jira.jboss.com/jira/browse/JBAOP-348 Project: JBoss AOP Issue Type: Bug Security Level: Public(Everyone can see) Affects Versions: 2.0.0.alpha2 Reporter: Flavia Rainone Assigned To: Flavia Rainone Fix For: 2.0.0.alpha6 This bug happens on generated advsior instrumentation, in the following scenario: - class A extends B - B is advised by AOP - A is not advised by AOP - B calls constructor of A - calls to A constructor are identified by a pointcut During the instrumentation of a class B, the call to constructor of A is identified. As a consequence, during the matching process, A temporary advisor is required, through AspectManager.getTempClassAdvisorIfNotExist method. This method identifies A as advisable (since it extends an advisable class, B) and tries to retrieve its advisor instead of getting a temporary class advisor. Since A doesn't have the class advisor field, aspect manager retrieves its super class advisor. However, this value isn't set yet because we are still instrumenting B class. Hence, a null advisor is returned, what triggers the NullPointerException on ConstructorCallMatcher. To reproduce this bug, it is enough to alter beforeafterArgs tests, by making TargetCallerPOJO a superclass of TargetCallerPOJO2. The stack trace: java.lang.ExceptionInInitializerError at org.jboss.test.aop.beforeafterArgs.CallerTestCase.setUp(CallerTestCase.java:60) Caused by: java.lang.RuntimeException: java.lang.RuntimeException: java.lang.NullPointerException at org.jboss.aop.ClassAdvisor.doResolveCallerConstructorInfo(ClassAdvisor.java:1563) at org.jboss.aop.ClassAdvisor.access$400(ClassAdvisor.java:83) at org.jboss.aop.ClassAdvisor$ResolveCallerConstuctorInfoAction$1.run(ClassAdvisor.java:2028) at java.security.AccessController.doPrivileged(Native Method) at org.jboss.aop.ClassAdvisor$ResolveCallerConstuctorInfoAction$1 .resolveInfo(ClassAdvisor.java:2024) at org.jboss.aop.ClassAdvisor.resolveCallerConstructorInfo(ClassAdvisor.java:1527) at org.jboss.test.aop.beforeafterArgs.TargetCallerPOJO$TargetCallerPOJOAdvisor.initialiseCallers(TargetCallerPOJO$TargetCallerPOJOAdvisor.java) at org.jboss.test.aop.beforeafterArgs.TargetCallerPOJO$TargetCallerPOJOAdvisor.initialise(TargetCallerPOJO$TargetCallerPOJOAdvisor.java) at org.jboss.test.aop.beforeafterArgs.TargetCallerPOJO$TargetCallerPOJOAdvisor.<init>(TargetCallerPOJO$TargetCallerPOJOAdvisor.java) at org.jboss.test.aop.beforeafterArgs.TargetCallerPOJO.<clinit>(TargetCallerPOJO.java) ... 13 more Caused by: java.lang.RuntimeException:java.lang.NullPointerException at org.jboss.aop.pointcut.ConstructorCallMatcher.visit(ConstructorCallMatcher.java:76) at org.jboss.aop.pointcut.ast.ASTCall.jjtAccept(ASTCall.java:41) at org.jboss.aop.pointcut.MatcherHelper.visit(MatcherHelper.java:89) at org.jboss.aop.pointcut.MatcherHelper.matches(MatcherHelper.java:83) at org.jboss.aop.pointcut.PointcutExpression.matchesCall(PointcutExpression.java:243) at org.jboss.aop.ClassAdvisor.doResolveCallerConstructorInfo(ClassAdvisor.java:1548) ... 22 more Caused by: java.lang.NullPointerException at org.jboss.aop.pointcut.ConstructorMatcher.<init>(ConstructorMatcher.java:61) at org.jboss.aop.pointcut.ConstructorCallMatcher.visit(ConstructorCallMatcher.java:71) .. 27 more