java.lang.NullPointerException

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  • I used a {{@args}} as PCD(Point Cut Designator), there is case that occur a NPE at calling the unrelated method. if all of following cases are matched, NPE are occurs. * A pointcut define using a {{@args}}. * Define a both with java method that applying AOP and java method that not applying AOP. * Call a java method that not applying AOP with specifying a null parameter. {code} java.lang.NullPointerException at org.aspectj.weaver.reflect.ShadowMatchImpl$RuntimeTestEvaluator.visit(ShadowMatchImpl.java:195) at org.aspectj.weaver.ast.HasAnnotation.accept(HasAnnotation.java:31) at org.aspectj.weaver.reflect.ShadowMatchImpl$RuntimeTestEvaluator.matches(ShadowMatchImpl.java:132) at org.aspectj.weaver.reflect.ShadowMatchImpl.matchesJoinPoint(ShadowMatchImpl.java:87) at org.springframework.aop.aspectj.AspectJExpressionPointcut.matches(AspectJExpressionPointcut.java:333) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:167) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:653) at org.springframework.issues.SampleService$$EnhancerBySpringCGLIB$$832f92bb.execute(<generated>) at org.springframework.issues.ReproTests.executeWithNull(ReproTests.java:32) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) at org.junit.runners.ParentRunner.run(ParentRunner.java:309) at org.junit.runner.JUnitCore.run(JUnitCore.java:160) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:78) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:212) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140) {code} For example: *Target Class* {code:java} public class SampleService { /** * Not matched method on {@link LoggingAspect}. */ public void execute(SampleInputBean inputBean) { System.out.println(getClass().getName() + "#execute(SampleInputBean) called."); } /** * Matched method on {@link LoggingAspect} * <p> * The SampleDto class have a {@link Loggable} annotation. */ public void execute(SampleDto dto) { System.out.println(getClass().getName() + "#execute(SampleDto) called."); } } {code} *Aspect* {code:java} @Aspect public class LoggingAspect { @Before("@args(org.springframework.issues.Loggable))") public void loggingBeginByAtArgs() { System.out.println("★★★start by @args★★★★"); } } {code} *JavaBean(TDO)* {code:java} @Loggable public class SampleDto { } {code} {code:java} public class SampleInputBean { } {code} *Test Case* {code:java} @Test public void test() { ConfigurableApplicationContext ctx = new ClassPathXmlApplicationContext("org/springframework/issues/ReproTests-context.xml"); ctx.registerShutdownHook(); SampleService sampleService = ctx.getBean("sampleService", SampleService.class); sampleService.execute(new SampleDto()); // -> OK sampleService.execute(new SampleInputBean()); // -> OK sampleService.execute((SampleDto)null); // -> OK sampleService.execute((SampleInputBean)null); // -> NPE } {code}
    via by Kazuki Shimizu,
  • I used a {{@args}} as PCD(Point Cut Designator), there is case that occur a NPE at calling the unrelated method. if all of following cases are matched, NPE are occurs. * A pointcut define using a {{@args}}. * Define a both with java method that applying AOP and java method that not applying AOP. * Call a java method that not applying AOP with specifying a null parameter. {code} java.lang.NullPointerException at org.aspectj.weaver.reflect.ShadowMatchImpl$RuntimeTestEvaluator.visit(ShadowMatchImpl.java:195) at org.aspectj.weaver.ast.HasAnnotation.accept(HasAnnotation.java:31) at org.aspectj.weaver.reflect.ShadowMatchImpl$RuntimeTestEvaluator.matches(ShadowMatchImpl.java:132) at org.aspectj.weaver.reflect.ShadowMatchImpl.matchesJoinPoint(ShadowMatchImpl.java:87) at org.springframework.aop.aspectj.AspectJExpressionPointcut.matches(AspectJExpressionPointcut.java:333) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:167) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:653) at org.springframework.issues.SampleService$$EnhancerBySpringCGLIB$$832f92bb.execute(<generated>) at org.springframework.issues.ReproTests.executeWithNull(ReproTests.java:32) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) at org.junit.runners.ParentRunner.run(ParentRunner.java:309) at org.junit.runner.JUnitCore.run(JUnitCore.java:160) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:78) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:212) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140) {code} For example: *Target Class* {code:java} public class SampleService { /** * Not matched method on {@link LoggingAspect}. */ public void execute(SampleInputBean inputBean) { System.out.println(getClass().getName() + "#execute(SampleInputBean) called."); } /** * Matched method on {@link LoggingAspect} * <p> * The SampleDto class have a {@link Loggable} annotation. */ public void execute(SampleDto dto) { System.out.println(getClass().getName() + "#execute(SampleDto) called."); } } {code} *Aspect* {code:java} @Aspect public class LoggingAspect { @Before("@args(org.springframework.issues.Loggable))") public void loggingBeginByAtArgs() { System.out.println("★★★start by @args★★★★"); } } {code} *JavaBean(TDO)* {code:java} @Loggable public class SampleDto { } {code} {code:java} public class SampleInputBean { } {code} *Test Case* {code:java} @Test public void test() { ConfigurableApplicationContext ctx = new ClassPathXmlApplicationContext("org/springframework/issues/ReproTests-context.xml"); ctx.registerShutdownHook(); SampleService sampleService = ctx.getBean("sampleService", SampleService.class); sampleService.execute(new SampleDto()); // -> OK sampleService.execute(new SampleInputBean()); // -> OK sampleService.execute((SampleDto)null); // -> OK sampleService.execute((SampleInputBean)null); // -> NPE } {code}
    via by Kazuki Shimizu,
    • java.lang.NullPointerException at org.aspectj.weaver.reflect.ShadowMatchImpl$RuntimeTestEvaluator.visit(ShadowMatchImpl.java:195) at org.aspectj.weaver.ast.HasAnnotation.accept(HasAnnotation.java:31) at org.aspectj.weaver.reflect.ShadowMatchImpl$RuntimeTestEvaluator.matches(ShadowMatchImpl.java:132) at org.aspectj.weaver.reflect.ShadowMatchImpl.matchesJoinPoint(ShadowMatchImpl.java:87) at org.springframework.aop.aspectj.AspectJExpressionPointcut.matches(AspectJExpressionPointcut.java:333) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:167) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:653) at org.springframework.issues.SampleService$$EnhancerBySpringCGLIB$$832f92bb.execute(<generated>) at org.springframework.issues.ReproTests.executeWithNull(ReproTests.java:32) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) at org.junit.runners.ParentRunner.run(ParentRunner.java:309) at org.junit.runner.JUnitCore.run(JUnitCore.java:160) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:78) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:212) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
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