import { GraphQLSchema, ObjectTypeDefinitionNode, FieldDefinitionNode, DirectiveNode, GraphQLEnumType, GraphQLInterfaceType, InterfaceTypeDefinitionNode, GraphQLUnionType } from 'graphql';
import { SchemaDirective } from './SchemaDirective';
export declare const DIRECTIVES: SchemaDirective[];
export declare type SchemaNode = ObjectTypeDefinitionNode | FieldDefinitionNode | DirectiveNode;
export interface Visitor {
    /**
     * Generic visit function for the AST schema traversal.
     * Only ObjectTypeDefinition and FieldDefinition nodes are included in the path during the
     * traversal
     *
     * May throw validation errors
     *
     * @param path: DFS path in the schema tree ending at the directive node of interest
     */
    visit: (path: SchemaNode[]) => void;
}
export interface Visitors {
    /**
     * A map from the node name to the Visitor
     *
     * During a DFS traversal of the AST tree if a directive node
     * name matches the key in the directives map, the corresponding visitor is called
     */
    directives: {
        [name: string]: Visitor;
    };
}
/**
 * Parse GraphQL schema
 * @constructor(schemaPath: string)
 */
export declare class GraphQLSchemaParser {
    schema: GraphQLSchema;
    private _objectTypeDefinations;
    private namedTypes;
    constructor(schemaPath: string);
    private getUnifiedSchema;
    private static buildPreamble;
    /**
     * Read GrapqhQL schema and build a schema from it
     */
    static buildSchema(contents: string): GraphQLSchema;
    getEnumTypes(): GraphQLEnumType[];
    getInterfaceTypes(): GraphQLInterfaceType[];
    getUnionTypes(): GraphQLUnionType[];
    /**
     * Get object type definations from the schema. Build-in and scalar types are excluded.
     */
    static createObjectTypeDefinations(schema: GraphQLSchema): ObjectTypeDefinitionNode[];
    /**
     * Returns fields for a given GraphQL object
     * @param objDefinationNode ObjectTypeDefinitionNode
     */
    getFields(objDefinationNode: ObjectTypeDefinitionNode | InterfaceTypeDefinitionNode): FieldDefinitionNode[];
    /**
     * Returns GraphQL object type definations
     */
    getObjectDefinations(): ObjectTypeDefinitionNode[];
    /**
     * DFS traversal of the AST
     */
    dfsTraversal(visitors: Visitors): void;
}