/**
 * Base repository interface providing common repository functionality
 */
export declare abstract class BaseRepository<T> {
    /**
     * Check if entity exists by ID
     */
    abstract exists(id: number): Promise<boolean>;
    /**
     * Find entity by ID
     */
    abstract findById(id: number): Promise<T | null>;
    /**
     * Save entity (create or update)
     * Returns the saved entity with generated ID if it was a new entity
     */
    abstract save(entity: T): Promise<T>;
    /**
     * Delete entity by ID
     */
    abstract delete(id: number): Promise<void>;
    /**
     * Get entity by ID or throw NotFoundError
     */
    protected getByIdOrThrow(id: number): Promise<T>;
    /**
     * Check if entity exists and throw ConflictError if it does
     */
    protected checkNotExists(id: number, entityType: string): Promise<void>;
    /**
     * Check if entity exists and throw NotFoundError if it doesn't
     */
    protected checkExists(id: number, entityType: string): Promise<void>;
}
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