ParkGyeongTae opened a new pull request, #4933:
URL: https://github.com/apache/zeppelin/pull/4933
### What is this PR for?
This PR improves the robustness and clarity of the Elasticsearch interpreter
module in Zeppelin.
- Reimplemented `ActionResponse#getHit()` to throw `NoSuchElementException`
instead of relying on unchecked access to the first hit.
- Introduced a new method `getFirstHit()` which returns an
`Optional<HitWrapper>` for safer optional access.
- Added and refined Javadoc comments in:
- `ActionResponse.java` for both `getHit()` and `getFirstHit()`
- `ElasticsearchClient.java` to improve clarity on interface usage
### What type of PR is it?
Documentation
Refactoring
### Todos
* [x] Refactor `getHit()` to throw a safe exception
* [x] Add `getFirstHit()` method using `Optional`
### What is the Jira issue?
* https://issues.apache.org/jira/browse/ZEPPELIN/ZEPPELIN-6192
### How should this be tested?
* Build Test
* Elasticsearch Interpreter Test
### Screenshots (if appropriate)
### Questions:
* Does the license files need to update? No.
* Is there breaking changes for older versions? No.
* Does this needs documentation? No.
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