/**
 * @nahisaho/musubix-codegraph - SQLite Storage Implementation
 *
 * Persistent SQLite-based storage adapter for CodeGraph
 *
 * @see REQ-CG-API-005
 * @see DES-CG-006
 * @see TSK-CG-052
 */
import type { StorageAdapter, StorageStats, Entity, Relation, GraphQuery } from '../types.js';
/**
 * SQLite storage adapter
 *
 * Stores entities and relations in SQLite database for persistence.
 *
 * @example
 * ```typescript
 * const storage = new SQLiteStorage('.codegraph/index.db');
 * await storage.initialize();
 *
 * await storage.saveEntity(entity);
 * const retrieved = await storage.getEntity(entity.id);
 * ```
 */
export declare class SQLiteStorage implements StorageAdapter {
    private dbPath;
    private db;
    private initialized;
    constructor(dbPath?: string);
    /**
     * Initialize the database
     */
    initialize(): Promise<void>;
    /**
     * Close the database connection
     */
    close(): Promise<void>;
    /**
     * Save an entity
     */
    saveEntity(entity: Entity): Promise<void>;
    /**
     * Get an entity by ID
     */
    getEntity(id: string): Promise<Entity | null>;
    /**
     * Query entities
     */
    queryEntities(query: GraphQuery): Promise<Entity[]>;
    /**
     * Delete an entity
     */
    deleteEntity(id: string): Promise<void>;
    /**
     * Save a relation
     */
    saveRelation(relation: Relation): Promise<void>;
    /**
     * Get relations for an entity
     */
    getRelations(entityId: string, direction?: 'in' | 'out' | 'both'): Promise<Relation[]>;
    /**
     * Delete a relation
     */
    deleteRelation(id: string): Promise<void>;
    /**
     * Bulk save entities and relations
     */
    bulkSave(entities: Entity[], relations: Relation[]): Promise<void>;
    /**
     * Clear all data
     */
    clear(): Promise<void>;
    /**
     * Get storage statistics
     */
    getStats(): Promise<StorageStats>;
    private ensureInitialized;
    private rowToEntity;
    private rowToRelation;
    /**
     * Check if storage is initialized
     */
    isInitialized(): boolean;
    /**
     * Get database path
     */
    getDatabasePath(): string;
}
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