Kotlin Property Override Extension

fieldValueOverride.kt

    fun addBloodlineToCharacter(characterId: String, bloodlineId: String): CharacterOutput? {
        val character: CharacterDocument = characterRepository.findById(characterId)
        updatedCharacter = characterRepository.save(character.override(_bloodlineId = bloodlineId))
        updatedCharacter.asOutput()
    }
    
    fun CharacterDocument.override(
        _name: String = this.name,
        _age: Short = this.age,
        _bloodlineId: String? = this.bloodlineId,
        _villageId: String? = this.villageId,
        _timestamp: Long? = this.timestamp,
    ): CharacterDocument {
        return CharacterDocument(
            id = this.id,
            name = _name,
            age = _age,
            bloodlineId = _bloodlineId,
            villageId = _villageId,
            timestamp = _timestamp
        )
    }