import { DataAdapter } from "../data-adapter.js";
import { DiscardObsoleteFragmentType } from "../obsolete-handling.js";
import { Source } from "../source.js";
import { DataJson } from "./json-format.js";
export declare class DefaultDataAdapter implements DataAdapter {
    #private;
    watchPatterns?: string[] | undefined;
    /**
     * Create a new default data adapter.
     *
     * @param filename The absolute filename where to store data. If undefined, this data adapter is inert and can only be used for testing by using {@link importJson} and {@link exportJson}.
     * @param watchable If true, this adapter supports watching the translation data file for changes.
     */
    constructor(filename?: string, watchable?: boolean);
    get revision(): number;
    /**
     * Import translation data from it's json representation.
     *
     * This will increment the {@link revision}.
     */
    importJson(data: DataJson): void;
    reload(): Promise<boolean>;
    get modified(): boolean;
    /**
     * Export translation data to it's json representation.
     *
     * This will not clear the {@link modified} flag. To clear it, use {@link clearModified}.
     */
    exportJson(): DataJson;
    persist(): Promise<void>;
    /**
     * Clear the {@link modified} flag.
     */
    clearModified(): void;
    updateFragment(sourceId: string, fragmentId: string, update: Source.FragmentUpdate): void;
    discardFragments(sourceId: string, type: DiscardObsoleteFragmentType, keepFragmentIds?: DataAdapter.IdSet): void;
    discardSources(type: DiscardObsoleteFragmentType, keepSourceIds: DataAdapter.IdSet): void;
    getSyncFragment(sourceId: string, fragment: Source.Fragment): DataAdapter.Fragment | undefined;
    forEachSyncFragment(getSource: (sourceId: string) => Source | undefined, callback: (fragmentId: string, fragment: DataAdapter.Fragment) => void): void;
}