/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { UrlTree } from './url_tree';
/**
 * @whatItDoes Provides a way to migrate Angular 1 applications to Angular 2.
 *
 * @experimental
 */
export declare abstract class UrlHandlingStrategy {
    /**
     * Tells the router if this URL should be processed.
     *
     * When it returns true, the router will execute the regular navigation.
     * When it returns false, the router will set the router state to an empty state.
     * As a result, all the active components will be destroyed.
     *
     */
    abstract shouldProcessUrl(url: UrlTree): boolean;
    /**
     * Extracts the part of the URL that should be handled by the router.
     * The rest of the URL will remain untouched.
     */
    abstract extract(url: UrlTree): UrlTree;
    /**
     * Merges the URL fragment with the rest of the URL.
     */
    abstract merge(newUrlPart: UrlTree, rawUrl: UrlTree): UrlTree;
}
/**
 * @experimental
 */
export declare class DefaultUrlHandlingStrategy implements UrlHandlingStrategy {
    shouldProcessUrl(url: UrlTree): boolean;
    extract(url: UrlTree): UrlTree;
    merge(newUrlPart: UrlTree, wholeUrl: UrlTree): UrlTree;
}
