spring-projects / spring-projects/spring-framework

`ResolvableType::isInstance` should respect AOP proxy

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status: waiting-for-triage
Dominant language
Java
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Description

Currently doesn't detect target wrapped by proxy.

boolean b1 = resolvableType.isInstance(target); // true
// wrap target to JDK Dynamic Proxy
boolean b2 = resolvableType.isInstance(proxy); // false

See https://github.com/spring-projects/spring-framework/pull/37047#issue-4879201728

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First steps

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start at ResolvableType::isInstance and read the linked pull request for context on the JDK Dynamic Proxy case. Trace how the target and proxy are inspected, then verify that the proxy produces the expected instance result and add or update coverage for the shown example.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
backend
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
55/100

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