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definition on the HTTP+REST API.

Description

Defining proper contracts on Nullability for the HTTP+REST transport and client

@ehsavoie ehsavoie requested review from fjuma and kabir and removed request for fjuma October 10, 2025 08:04
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Summary of Changes

Hello @ehsavoie, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the robustness and clarity of the HTTP+REST API by introducing explicit nullability contracts using JSpecify annotations and configuring static analysis tools like Error Prone and NullAway. These changes aim to prevent NullPointerExceptions at compile time, improve code predictability, and modernize the codebase with Java 17 features, ultimately leading to a more reliable and maintainable system.

Highlights

  • Nullability Enforcement: Integrated JSpecify annotations (@Nullable, @NullMarked) across the codebase to explicitly define nullability contracts for fields, parameters, and return types, enhancing static analysis capabilities.
  • Static Analysis Configuration: Updated pom.xml to configure Error Prone and NullAway, enabling strict nullability checks at compile time, with specific exclusions for test and generated code.
  • Code Modernization: Refactored several switch statements to use Java 17's enhanced switch expressions, improving code readability and conciseness in error mapping and enum parsing.
  • Robustness Improvements: Added explicit null checks and improved default value handling in various client and server components to prevent potential NullPointerExceptions and ensure more predictable behavior.
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Code Review

This pull request does a great job of improving null-safety by introducing jspecify annotations and fixing potential null-related issues. The refactorings to use modern Java features like switch expressions and defensive copying are also valuable improvements.
I've identified a few issues, including two critical visibility changes that would break compilation, a redundant line of code, a minor logging improvement, and a style suggestion for better readability. Please address these points to finalize the PR.

definition on the HTTP+REST  API.

Signed-off-by: Emmanuel Hugonnet <ehugonne@redhat.com>
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Thanks @ehsavoie!

@fjuma fjuma merged commit 47c906f into a2aproject:main Oct 10, 2025
9 of 14 checks passed
@ehsavoie ehsavoie deleted the jspecify_rest branch December 11, 2025 08:22
kabir pushed a commit to kabir/a2a-java that referenced this pull request Dec 23, 2025
…roject#332)

definition on the HTTP+REST  API.

# Description
Defining proper contracts on Nullability for the HTTP+REST transport and
client

Signed-off-by: Emmanuel Hugonnet <ehugonne@redhat.com>
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2 participants