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Not annotated parameter overrides @??? parameter
While overriding code:
from: org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader
I receive an IntelliJ warning:
Not annotated parameter overrides @??? parameter less... (Strg+F1) Inspection info: Reports problems related to @Nullable and @NotNull annotations usage configured in Constant conditions & exceptions inspection.
What can I do to avoid that?
- intellij-idea
Explanation
Although I can't reproduce this on AbstractItemCountingItemStreamItemReader from this artifact
, this annotation means that the parent method has some @NotNull / @NonNull annotation on the parameter, while the overriding method has no.
To fix it, you need to put the same annotation on the overriding method.
As I wrote, there is no such annotation in the version I've downloaded, but check your sources and copy the parameter annotation from there.
This warning sometimes gets buggy, so it can help to restart the IDEA. Restarting helped when I tried to write a trivial example to reproduce the warning.
A trivial reproducible example
Parent class:
Child class:
- Specially note that non-annotating @Nullable method does not provoke any warning.
- Warning only worked after IDEA restart.
- The whole inspection looks to work pretty buggy, if you turn on/off the checkboxes in the inspection settings and try to reproduce them. So, again, restarting/invalidating caches may help to get rid or show the incorrect warning.
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[Solved]-Not annotated parameter overrides @NonNullApi parameter-Springboot
https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/lang/NonNullApi.html :
A common Spring annotation to declare that parameters and return values are to be considered as non-nullable by default for a given package.
Here's the org/springframework/core/convert/converter/package-info.java :
@NonNullApi can be overridden at the method level with the @Nullable annotation to prevent the warning for a method that might return null, and that's what you see in org.springframework.core.convert.converter.Converter :
On you overriding method you don't specify the @Nullable annotation and thus the warning.
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Not annotated parameter overrides @NonNullApi parameter
idea警告，就下面这样
Not annotated parameter overrides @NonNullApi parameter
Not annotated parameter overrides @NotNull parameter
这个警告看起来很不友好，看起来是让你加上@NotNull注解或者@NonNullApi ，但是加了根本没用！！！ 虽然只是警告 但是强迫症很难受！！！
直译：没有被注解的参数重写了@NonNullApi参数 这个提示是说因为被重写的方法的包被这个@NonNullApi注解了，所以方法参数也需要被注解 提示Not annotated parameter是说没有给参数加注解，至于加啥注解提示里没说。
解决方式（两种）
使用“javax.annotation.nonnull”注解可以解决.
直接给参数添加@Nonnull注解
使用“org.springframework.lang.NonNullApi”注解可以解决
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When using null-related annotations at global scope level, for instance using javax.annotation.ParametersAreNonnullByDefault (from JSR-305) at package level, it means that all the parameters to all the methods included in the package will, or should, be considered Non- null . It is equivalent to annotating every parameter in every method with non-null annotations (such as @Nonnull ).
The rule raises an issue every time a parameter could be null for a method invocation, where the method is annotated as forbidding null parameters.
Noncompliant Code Example
Compliant solution.
Two solutions are possible:
- The signature of the method is correct, and null check should be done prior to the call.
- The signature of the method is not coherent and should be annotated to allow null values being passed as parameter
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COMMENTS
, this annotation means that the parent method has some @NotNull / @NonNull annotation on the parameter, while the overriding method has no. To
The bug is that this warning appears when "@NonNull" should be used to annotate an overridden parameter, but the warning text indicates that
What steps will reproduce the issue? ... What is the expected result? Smth like "Not annotated parameter overrides NotNull parameter", or no warnings. What
@NonNullApi can be overridden at the method level with the @Nullable annotation to prevent the warning for a method that might return null, and that's what you
Android : Meaning of Android Studio error: Not annotated parameter overrides @NonNull parameter [ Beautify Your Computer
Not annotated parameter overrides @NotNull parameter ... The purpose is to allow the compiler to warn when certain assumptions are being violated
parameter is annotated, the analyzer reports an error if the pointer is null., Optional pointer parameters When a pointer parameter annotation, This annotation
现象：idea报错，就下面这样Not annotated parameter overrides @NonNullApi parameter类似的还有这个：Not annotated parameter overrides @NotNull
The signature of the method is not coherent and should be annotated to allow null values being passed as parameter. @javax.annotation.
... parameters for onCommand, over commandsender, command and st, with the message "Not annotated parameter overrides @NotNull parameter"