uber/NullAway

Disallow writing `@Initializer` on constructors

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#540 创建于 2022年1月6日

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good first issue

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描述

If a constructor is annotated with @Initializer, NullAway currently treats the constructor as if it were an initializer method that runs after any constructor, which clearly doesn't make sense. Instead, NullAway should report an error, as this is an invalid use of @Initializer.

贡献者指南

研究方向
Look at NullAway's source code to understand how `@Initializer` is currently validated, likely in a handler or checker class. Examine existing checks for invalid annotation usage patterns, such as `@NonNull` on primitives. Add a new check that detects when `@Initializer` is applied to a constructor and reports an error. Consider writing a unit test to verify the behavior. Refer to issue #540 and the file `com/uber/nullaway/NullAway.java` or similar.
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java
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backendtooling
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Javaannotation processing basics
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