Summary

This PR extends Maven's UpgradeDependencyVersion recipe to automatically upgrade annotation processor versions in Maven's <annotationProcessorPaths> configuration, bringing Maven's behavior in line with how Gradle already handles annotation processor upgrades.

Problem

Previously, when using UpgradeDependencyVersion to upgrade dependencies like MapStruct, the recipe would upgrade:

• Regular dependencies in <dependencies>
• Plugin dependencies in <plugin><dependencies>
• Gradle annotation processors

However, it would not upgrade Maven annotation processors defined in:

<annotationProcessorPaths>
  <path>
    <groupId>org.mapstruct</groupId>
    <artifactId>mapstruct-processor</artifactId>
    <version>1.4.1.Final</version>
  </path>
</annotationProcessorPaths>

This inconsistency meant that users had to manually update annotation processor versions in Maven projects, even when using automated dependency upgrade recipes.

Solution

This change treats Maven's <annotationProcessorPaths><path> elements similarly to plugin dependencies, ensuring they are upgraded alongside regular dependencies. The implementation:

1. Adds detection for annotation processor path tags using a new ANNOTATION_PROCESSORS_PATH_MATCHER
2. Reuses the existing upgrade logic (renamed from upgradePluginDependency to upgradeTag) for both plugin dependencies and annotation processor paths
3. Properly handles version properties used in annotation processor declarations

Testing

Added comprehensive tests demonstrating:

• Direct version upgrades in annotation processor paths
• Version property resolution for annotation processors
• Verification that Gradle variant of the recipe at the moment does the same thing.

Impact

This ensures consistent dependency management across build systems, eliminating the need for manual intervention when upgrading libraries that include annotation processors (like MapStruct, Lombok, etc.).

References

• Related discussion: Upgrading spotbugs plugin and mapstruct rewrite-migrate-java#818 (comment)