Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

NullPointerException when calling AnnotationInfo#getParameterValues

See original GitHub issue

I want to get the current value from the io.swagger.annotations.ApiOperation annotation. In my use case I must get the value for notes.

final AnnotationInfo annotationInfo = methodInfo.getAnnotationInfo( ApiOperation.class.getName() );
assertThat( annotationInfo ).isNotNull();
final String value = annotationInfo.getParameterValues().get( "notes" ).getValue().toString();

Annotation to get the value from: @ApiOperation(value = "", notes = "${snippetclassifications.findById}", response = RestSnippetClassification.class)

The getParameterValues() call throws the following NullPointerException:

java.lang.NullPointerException
	at io.github.classgraph.ObjectTypedValueWrapper.getArrayValueClassOrName(ObjectTypedValueWrapper.java:291)
	at io.github.classgraph.ObjectTypedValueWrapper.convertWrapperArraysToPrimitiveArrays(ObjectTypedValueWrapper.java:372)
	at io.github.classgraph.AnnotationParameterValue.convertWrapperArraysToPrimitiveArrays(AnnotationParameterValue.java:165)
	at io.github.classgraph.AnnotationParameterValueList.convertWrapperArraysToPrimitiveArrays(AnnotationParameterValueList.java:110)
	at io.github.classgraph.AnnotationInfo.convertWrapperArraysToPrimitiveArrays(AnnotationInfo.java:458)
	at io.github.classgraph.ObjectTypedValueWrapper.convertWrapperArraysToPrimitiveArrays(ObjectTypedValueWrapper.java:362)
	at io.github.classgraph.AnnotationParameterValue.convertWrapperArraysToPrimitiveArrays(AnnotationParameterValue.java:165)
	at io.github.classgraph.AnnotationParameterValueList.convertWrapperArraysToPrimitiveArrays(AnnotationParameterValueList.java:110)
	at io.github.classgraph.AnnotationInfo.getParameterValues(AnnotationInfo.java:136)
	at de.myview.xom.rest.api.AbstractApiControllerTest.checkApiOperationNotesProperty(AbstractApiControllerTest.java:590)
	at de.myview.xom.rest.api.AbstractApiControllerTest.lambda$33(AbstractApiControllerTest.java:578)

This happens when the code tries to get the default-value for the property properties. This property has following definition:

Extension[] extensions() default @Extension(properties = @ExtensionProperty(name = "", value = ""));

I have used ClassGraph 4.8.47 and attached the verbose output of my test. verbose.log

Issue Analytics

State:
Created 4 years ago
Comments:10 (7 by maintainers)

Top GitHub Comments

1reaction

torstenkuhnhennecommented, Sep 28, 2019

@lukehutch I can confirm that the current snapshot version is working 😃

Thank you for your quick support and the good work. I use ClassGraph a lot and it works like a charm!

0reactions

lukehutchcommented, Oct 16, 2019

@torstenkuhnhenne After a very long time trying to solve issues with both Sonatype and BinTray, Maven deployment is fixed again, and ClassGraph version 4.8.48 should be in Maven Central in a few hours. Sorry for the delay.

Top Results From Across the Web

How to Fix and Avoid NullPointerException in Java - Rollbar

NullPointerException in Java occurs when a variable is accessed which is not pointing to any object and refers to nothing or null.

java - What is a NullPointerException, and how do I fix it?

Calling super on a null reference throws a NullPointerException . If you are confused, this is talking about qualified superclass constructor invocations: class ......

Java NullPointerException - Detect, Fix, and Best Practices

1. NullPointerException when calling an instance method · 2. Java NullPointerException while accessing/modifying field of a null object · 3. Java ...

Null Pointer Exception In Java - GeeksforGeeks

NullPointerException is thrown when program attempts to use an object reference that has the null value.

NullPointerException (Java Platform SE 7 ) - Oracle Help Center

Thrown when an application attempts to use null in a case where an object is required. These include: Calling the instance method of...