feat: add getMetadata method for RequestContext

[flex-myeonghyeon]

Description

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Fixes #<issue_number_goes_here> 🦕

[gemini-code-assist]

Summary of Changes

Hello @flex-myeonghyeon, 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 introduces a new capability to the RequestContext by exposing request metadata. This enhancement allows other components to easily access additional context associated with a request, improving the flexibility and information richness of the request handling process. The change is fully covered by new unit tests to ensure correctness.

Highlights

• New Feature: Metadata Access: A new getMetadata() method has been added to the RequestContext class, allowing retrieval of request-specific metadata as an unmodifiable map.
• Unit Test Coverage: Comprehensive unit tests have been introduced for the getMetadata() method, covering scenarios where metadata is null and when it is populated.

Changelog

• server-common/src/main/java/io/a2a/server/agentexecution/RequestContext.java
  • Imported java.util.Map.
  • Added a public getMetadata() method to retrieve request metadata, returning an unmodifiable map or null.
• server-common/src/test/java/io/a2a/server/agentexecution/RequestContextTest.java
  • Imported java.util.HashMap.
  • Verified getMetadata() returns null when no parameters are provided in testInitWithoutParams.
  • Added a new test case testInitWithParamsMetadata to confirm correct metadata retrieval when parameters are set.

Activity

• No human activity has been recorded on this pull request yet.

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[gemini-code-assist]

Code Review

This pull request adds a getMetadata method to RequestContext to expose request metadata. The implementation is correct and includes corresponding tests. I've suggested a small improvement to the tests to verify the immutability of the returned metadata map, which is an important contract to enforce.

[kabir]

/gemini review

[gemini-code-assist]

Code Review

The pull request introduces a new getMetadata method to the RequestContext class, allowing access to request-specific metadata. The change also includes corresponding test cases to ensure its functionality and immutability. The implementation correctly handles null cases and returns an unmodifiable map, which is good for preventing external modifications. The changes are well-contained and address the stated feature request effectively.

[kabir]

@jmesnil @ehsavoie I approved this, please one of you see if you agree