import { Index } from '../../ast/entity';
import { Block } from '../../ast/entity/block';
import { DataSource } from '../../ast/entity/data-source';
import { Field } from '../../ast/entity/field';
import { Table } from '../../ast/entity/table';
import { Configuration } from '../../util/configuration';
import { LogListener } from '../../util/log-listener';
export interface OutputWriter {
    appendContents(text: string): void;
}
export declare enum SourceType {
    TABLE = 0,
    FIELD = 1,
    UNIQUE = 2,
    INDEX = 3,
    FOREIGN = 4,
    CONSTRAINT = 5,
    REFERENCE = 6,
    INHERITED = 7,
    PRIMARY = 8,
    OPTION = 9,
    IMAGE = 10,
    COMMENT = 11
}
export declare class SourceContext {
    type: SourceType;
    tableStack: Table[];
    field: Field;
    index?: Index;
    option?: string;
    comment?: string;
    output: OutputWriter;
    config: Configuration;
    data: DataSource;
    position: number;
}
export declare abstract class Source extends Block {
    protected configuration: Configuration;
    filePathOrContents?: string;
    protected logger?: LogListener;
    encoding: string;
    constructor(configuration: Configuration, filePathOrContents?: string);
    abstract load(pathAsContent?: boolean): Promise<void>;
    setLogger(logger: LogListener): void;
    readFile(fileName: string): Promise<string>;
    writeFile(fileName: string, contents: string): Promise<void>;
}