openrewrite / openrewrite/rewrite-static-analysis

RSPEC-4034 - "Stream" call chains should be simplified when possible

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recipe
Dominant language
Java
Stars
62
Forks
112
Avg merge
1d 19h
Merged PRs (30d)
40

Description


 private static boolean isTypeAllowed(String type) {
        return Set.of("types").stream().filter(type::contains).collect(Collectors.toList()).isEmpty();
    }

 private static boolean isTypeAllowed(String type) {
        return Set.of("types").stream().stream().filter(type::contains).count() == 0
    }


 private static boolean isTypeAllowed(String type) {
        return Set.of("types").stream().noneMatch(type::contains);
    }

More examples : https://rules.sonarsource.com/java/RSPEC-4034

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reviewing the RSPEC-4034 examples in the issue and the linked Sonar rule, then inspect the repository's existing Java static-analysis recipes and tests for the entry point used to detect stream call chains. Done means the applicable chains are simplified to equivalent terminal operations and the behavior is covered by tests.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
tooling
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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