import type { Connection } from './Connection';
export type BeanState = 'new' | 'loaded' | 'dirty' | 'deleted';
/**
 * Base for all generated beans. Tracks dirty fields so DAO.save can issue minimal UPDATEs.
 */
export declare abstract class AbstractBean {
    protected _data: Record<string, unknown>;
    protected _dirty: Set<string>;
    protected _state: BeanState;
    /** Set by DAO when the bean is materialized; enables FK accessors to navigate. */
    _connection?: Connection;
    /** Hydrate from a row returned by the DB. Resets dirty state. */
    _hydrate(row: Record<string, unknown>): void;
    _bindConnection(conn: Connection): void;
    protected _get<T>(column: string): T;
    protected _set(column: string, value: unknown): void;
    /** Internal: snapshot of all current column values. */
    _snapshot(): Record<string, unknown>;
    /** Internal: only the columns that have been mutated since last hydrate. */
    _dirtyDiff(): Record<string, unknown>;
    _markDeleted(): void;
    _isDirty(): boolean;
    _isNew(): boolean;
    _isDeleted(): boolean;
    toJSON(): Record<string, unknown>;
}