/// <reference types="node" />
import Optional from '../base/Optional';
import Iterator from "../base/Iterator";
import DbfRecord from '../dbf/DbfRecord';
import DbfHeader from '../dbf/DbfHeader';
import { FileStream } from 'ginkgoch-filestream';
import IQueryFilter from '../shared/IQueryFilter';
export default class DbfIterator extends Iterator<DbfRecord> {
    _index: number;
    _header: DbfHeader;
    _stream: FileStream;
    _filter: {
        from: number;
        limit: number;
        to: number;
        fields?: string[];
    };
    constructor(fd: number, header: DbfHeader, filter?: IQueryFilter);
    /**
     * @override
     * @returns {Promise<Optional<DbfRecord>}
     */
    next(): Optional<DbfRecord>;
    /**
     *
     * @param {Buffer} buffer
     * @param {DbfHeader} header
     * @param {Array<string>} fieldNames
     * @returns {DbfRecord}
     */
    static _readRecord(buffer: Buffer, header: DbfHeader, fieldNames?: string[]): DbfRecord;
}
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