e51d5aa678
This commit extends the Album entity with bidirectional relationship
management for the AlbumHasGenre join table, enabling many-to-many
associations between albums and genres with convenient helper methods.
Key enhancements:
Relationship Mapping:
- Added OneToMany relationship from Album to AlbumHasGenre
* Bidirectional mapping with cascade ALL and orphan removal
* Maintains collection of album-genre associations
* Initialized as ArrayList to prevent null pointer exceptions
* Follows the same pattern as albumArtists relationship
Helper Methods for Genre Management:
- addGenre(Genre genre):
* Creates AlbumHasGenre join table entry
* Sets bidirectional references to Album and Genre
* Adds association to albumGenres collection
* Simplifies adding genres to albums programmatically
- removeGenre(Genre genre):
* Removes association by comparing genre IDs
* Safely handles null checks
* Uses removeIf for clean collection manipulation
* Maintains referential integrity
- getGenres():
* Convenience method to extract Genre list from join table
* Uses Java streams for clean transformation
* Maps AlbumHasGenre → Genre
* Returns List<Genre> for easy consumption
Collection Management:
- Added getAlbumGenres() getter
* Returns full List<AlbumHasGenre> for direct access
* Useful for repository-level operations
- Added setAlbumGenres() setter
* Allows bulk replacement of genre associations
* Required by JPA for entity hydration
Benefits:
- Enables navigating from Album to associated Genres
- Simplifies genre association management in service layer
- Cascade operations ensure join table entries are managed automatically
- Orphan removal prevents orphaned join table entries
- Consistent API with existing Artist relationship methods
- Type-safe genre management through helper methods
Pattern Consistency:
This implementation mirrors the albumArtists relationship structure,
providing a consistent API for managing both artist and genre associations
on the Album entity. Both relationships use the same cascade and orphan
removal strategies for reliable data integrity.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
This commit message is ready to use in IntelliJ for the Album.java changes!
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