import { Coordinate, Item } from "@fjell/types";
/**
 * Utility class for serializing and deserializing items to/from JSON
 */
export declare class FileProcessor {
    /**
     * Serialize an item to JSON string
     */
    serialize<V extends Item<any, any, any, any, any, any>>(item: V): string;
    /**
     * Deserialize JSON string to an item
     * Returns null if deserialization fails or item is invalid
     */
    deserialize<V extends Item<any, any, any, any, any, any>>(content: string, _coordinate: Coordinate<any, any, any, any, any, any>): V | null;
    /**
     * Validate that an object has the basic structure of an Item
     */
    validateItemStructure(item: any): item is Item<any, any, any, any, any, any>;
    /**
     * Serialize item to a Buffer (for uploading to GCS)
     */
    serializeToBuffer<V extends Item<any, any, any, any, any, any>>(item: V): Buffer;
    /**
     * Deserialize from a Buffer (from GCS download)
     */
    deserializeFromBuffer<V extends Item<any, any, any, any, any, any>>(buffer: Buffer, coordinate: Coordinate<any, any, any, any, any, any>): V | null;
    /**
     * Check if content is valid JSON
     */
    isValidJson(content: string): boolean;
    /**
     * Pretty print JSON (for debugging)
     */
    prettyPrint(item: any): string;
}
/**
 * Singleton instance
 */
export declare const fileProcessor: FileProcessor;