@angular/router
Version:
Angular - the routing library
839 lines (838 loc) • 68.1 kB
JavaScript
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,uselessCode} checked by tsc
*/
/**
* @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 { PRIMARY_OUTLET, convertToParamMap } from './shared';
import { forEach, shallowEqual } from './utils/collection';
/**
* @return {?}
*/
export function createEmptyUrlTree() {
return new UrlTree(new UrlSegmentGroup([], {}), {}, null);
}
/**
* @param {?} container
* @param {?} containee
* @param {?} exact
* @return {?}
*/
export function containsTree(container, containee, exact) {
if (exact) {
return equalQueryParams(container.queryParams, containee.queryParams) &&
equalSegmentGroups(container.root, containee.root);
}
return containsQueryParams(container.queryParams, containee.queryParams) &&
containsSegmentGroup(container.root, containee.root);
}
/**
* @param {?} container
* @param {?} containee
* @return {?}
*/
function equalQueryParams(container, containee) {
// TODO: This does not handle array params correctly.
return shallowEqual(container, containee);
}
/**
* @param {?} container
* @param {?} containee
* @return {?}
*/
function equalSegmentGroups(container, containee) {
if (!equalPath(container.segments, containee.segments))
return false;
if (container.numberOfChildren !== containee.numberOfChildren)
return false;
for (const c in containee.children) {
if (!container.children[c])
return false;
if (!equalSegmentGroups(container.children[c], containee.children[c]))
return false;
}
return true;
}
/**
* @param {?} container
* @param {?} containee
* @return {?}
*/
function containsQueryParams(container, containee) {
// TODO: This does not handle array params correctly.
return Object.keys(containee).length <= Object.keys(container).length &&
Object.keys(containee).every(key => containee[key] === container[key]);
}
/**
* @param {?} container
* @param {?} containee
* @return {?}
*/
function containsSegmentGroup(container, containee) {
return containsSegmentGroupHelper(container, containee, containee.segments);
}
/**
* @param {?} container
* @param {?} containee
* @param {?} containeePaths
* @return {?}
*/
function containsSegmentGroupHelper(container, containee, containeePaths) {
if (container.segments.length > containeePaths.length) {
/** @type {?} */
const current = container.segments.slice(0, containeePaths.length);
if (!equalPath(current, containeePaths))
return false;
if (containee.hasChildren())
return false;
return true;
}
else if (container.segments.length === containeePaths.length) {
if (!equalPath(container.segments, containeePaths))
return false;
for (const c in containee.children) {
if (!container.children[c])
return false;
if (!containsSegmentGroup(container.children[c], containee.children[c]))
return false;
}
return true;
}
else {
/** @type {?} */
const current = containeePaths.slice(0, container.segments.length);
/** @type {?} */
const next = containeePaths.slice(container.segments.length);
if (!equalPath(container.segments, current))
return false;
if (!container.children[PRIMARY_OUTLET])
return false;
return containsSegmentGroupHelper(container.children[PRIMARY_OUTLET], containee, next);
}
}
/**
* \@description
*
* Represents the parsed URL.
*
* Since a router state is a tree, and the URL is nothing but a serialized state, the URL is a
* serialized tree.
* UrlTree is a data structure that provides a lot of affordances in dealing with URLs
*
* \@usageNotes
* ### Example
*
* ```
* \@Component({templateUrl:'template.html'})
* class MyComponent {
* constructor(router: Router) {
* const tree: UrlTree =
* router.parseUrl('/team/33/(user/victor//support:help)?debug=true#fragment');
* const f = tree.fragment; // return 'fragment'
* const q = tree.queryParams; // returns {debug: 'true'}
* const g: UrlSegmentGroup = tree.root.children[PRIMARY_OUTLET];
* const s: UrlSegment[] = g.segments; // returns 2 segments 'team' and '33'
* g.children[PRIMARY_OUTLET].segments; // returns 2 segments 'user' and 'victor'
* g.children['support'].segments; // return 1 segment 'help'
* }
* }
* ```
*
* \@publicApi
*/
export class UrlTree {
/**
* \@internal
* @param {?} root
* @param {?} queryParams
* @param {?} fragment
*/
constructor(root, queryParams, fragment) {
this.root = root;
this.queryParams = queryParams;
this.fragment = fragment;
}
/**
* @return {?}
*/
get queryParamMap() {
if (!this._queryParamMap) {
this._queryParamMap = convertToParamMap(this.queryParams);
}
return this._queryParamMap;
}
/**
* \@docsNotRequired
* @return {?}
*/
toString() { return DEFAULT_SERIALIZER.serialize(this); }
}
if (false) {
/**
* \@internal
* @type {?}
*/
UrlTree.prototype._queryParamMap;
/**
* The root segment group of the URL tree
* @type {?}
*/
UrlTree.prototype.root;
/**
* The query params of the URL
* @type {?}
*/
UrlTree.prototype.queryParams;
/**
* The fragment of the URL
* @type {?}
*/
UrlTree.prototype.fragment;
}
/**
* \@description
*
* Represents the parsed URL segment group.
*
* See `UrlTree` for more information.
*
* \@publicApi
*/
export class UrlSegmentGroup {
/**
* @param {?} segments
* @param {?} children
*/
constructor(segments, children) {
this.segments = segments;
this.children = children;
/**
* The parent node in the url tree
*/
this.parent = null;
forEach(children, (v, k) => v.parent = this);
}
/**
* Whether the segment has child segments
* @return {?}
*/
hasChildren() { return this.numberOfChildren > 0; }
/**
* Number of child segments
* @return {?}
*/
get numberOfChildren() { return Object.keys(this.children).length; }
/**
* \@docsNotRequired
* @return {?}
*/
toString() { return serializePaths(this); }
}
if (false) {
/**
* \@internal
* @type {?}
*/
UrlSegmentGroup.prototype._sourceSegment;
/**
* \@internal
* @type {?}
*/
UrlSegmentGroup.prototype._segmentIndexShift;
/**
* The parent node in the url tree
* @type {?}
*/
UrlSegmentGroup.prototype.parent;
/**
* The URL segments of this group. See `UrlSegment` for more information
* @type {?}
*/
UrlSegmentGroup.prototype.segments;
/**
* The list of children of this group
* @type {?}
*/
UrlSegmentGroup.prototype.children;
}
/**
* \@description
*
* Represents a single URL segment.
*
* A UrlSegment is a part of a URL between the two slashes. It contains a path and the matrix
* parameters associated with the segment.
*
* \@usageNotes
* ### Example
*
* ```
* \@Component({templateUrl:'template.html'})
* class MyComponent {
* constructor(router: Router) {
* const tree: UrlTree = router.parseUrl('/team;id=33');
* const g: UrlSegmentGroup = tree.root.children[PRIMARY_OUTLET];
* const s: UrlSegment[] = g.segments;
* s[0].path; // returns 'team'
* s[0].parameters; // returns {id: 33}
* }
* }
* ```
*
* \@publicApi
*/
export class UrlSegment {
/**
* @param {?} path
* @param {?} parameters
*/
constructor(path, parameters) {
this.path = path;
this.parameters = parameters;
}
/**
* @return {?}
*/
get parameterMap() {
if (!this._parameterMap) {
this._parameterMap = convertToParamMap(this.parameters);
}
return this._parameterMap;
}
/**
* \@docsNotRequired
* @return {?}
*/
toString() { return serializePath(this); }
}
if (false) {
/**
* \@internal
* @type {?}
*/
UrlSegment.prototype._parameterMap;
/**
* The path part of a URL segment
* @type {?}
*/
UrlSegment.prototype.path;
/**
* The matrix parameters associated with a segment
* @type {?}
*/
UrlSegment.prototype.parameters;
}
/**
* @param {?} as
* @param {?} bs
* @return {?}
*/
export function equalSegments(as, bs) {
return equalPath(as, bs) && as.every((a, i) => shallowEqual(a.parameters, bs[i].parameters));
}
/**
* @param {?} as
* @param {?} bs
* @return {?}
*/
export function equalPath(as, bs) {
if (as.length !== bs.length)
return false;
return as.every((a, i) => a.path === bs[i].path);
}
/**
* @template T
* @param {?} segment
* @param {?} fn
* @return {?}
*/
export function mapChildrenIntoArray(segment, fn) {
/** @type {?} */
let res = [];
forEach(segment.children, (child, childOutlet) => {
if (childOutlet === PRIMARY_OUTLET) {
res = res.concat(fn(child, childOutlet));
}
});
forEach(segment.children, (child, childOutlet) => {
if (childOutlet !== PRIMARY_OUTLET) {
res = res.concat(fn(child, childOutlet));
}
});
return res;
}
/**
* \@description
*
* Serializes and deserializes a URL string into a URL tree.
*
* The url serialization strategy is customizable. You can
* make all URLs case insensitive by providing a custom UrlSerializer.
*
* See `DefaultUrlSerializer` for an example of a URL serializer.
*
* \@publicApi
* @abstract
*/
export class UrlSerializer {
}
if (false) {
/**
* Parse a url into a `UrlTree`
* @abstract
* @param {?} url
* @return {?}
*/
UrlSerializer.prototype.parse = function (url) { };
/**
* Converts a `UrlTree` into a url
* @abstract
* @param {?} tree
* @return {?}
*/
UrlSerializer.prototype.serialize = function (tree) { };
}
/**
* \@description
*
* A default implementation of the `UrlSerializer`.
*
* Example URLs:
*
* ```
* /inbox/33(popup:compose)
* /inbox/33;open=true/messages/44
* ```
*
* DefaultUrlSerializer uses parentheses to serialize secondary segments (e.g., popup:compose), the
* colon syntax to specify the outlet, and the ';parameter=value' syntax (e.g., open=true) to
* specify route specific parameters.
*
* \@publicApi
*/
export class DefaultUrlSerializer {
/**
* Parses a url into a `UrlTree`
* @param {?} url
* @return {?}
*/
parse(url) {
/** @type {?} */
const p = new UrlParser(url);
return new UrlTree(p.parseRootSegment(), p.parseQueryParams(), p.parseFragment());
}
/**
* Converts a `UrlTree` into a url
* @param {?} tree
* @return {?}
*/
serialize(tree) {
/** @type {?} */
const segment = `/${serializeSegment(tree.root, true)}`;
/** @type {?} */
const query = serializeQueryParams(tree.queryParams);
/** @type {?} */
const fragment = typeof tree.fragment === `string` ? `#${encodeUriFragment((/** @type {?} */ ((tree.fragment))))}` : '';
return `${segment}${query}${fragment}`;
}
}
/** @type {?} */
const DEFAULT_SERIALIZER = new DefaultUrlSerializer();
/**
* @param {?} segment
* @return {?}
*/
export function serializePaths(segment) {
return segment.segments.map(p => serializePath(p)).join('/');
}
/**
* @param {?} segment
* @param {?} root
* @return {?}
*/
function serializeSegment(segment, root) {
if (!segment.hasChildren()) {
return serializePaths(segment);
}
if (root) {
/** @type {?} */
const primary = segment.children[PRIMARY_OUTLET] ?
serializeSegment(segment.children[PRIMARY_OUTLET], false) :
'';
/** @type {?} */
const children = [];
forEach(segment.children, (v, k) => {
if (k !== PRIMARY_OUTLET) {
children.push(`${k}:${serializeSegment(v, false)}`);
}
});
return children.length > 0 ? `${primary}(${children.join('//')})` : primary;
}
else {
/** @type {?} */
const children = mapChildrenIntoArray(segment, (v, k) => {
if (k === PRIMARY_OUTLET) {
return [serializeSegment(segment.children[PRIMARY_OUTLET], false)];
}
return [`${k}:${serializeSegment(v, false)}`];
});
return `${serializePaths(segment)}/(${children.join('//')})`;
}
}
/**
* Encodes a URI string with the default encoding. This function will only ever be called from
* `encodeUriQuery` or `encodeUriSegment` as it's the base set of encodings to be used. We need
* a custom encoding because encodeURIComponent is too aggressive and encodes stuff that doesn't
* have to be encoded per https://url.spec.whatwg.org.
* @param {?} s
* @return {?}
*/
function encodeUriString(s) {
return encodeURIComponent(s)
.replace(/%40/g, '@')
.replace(/%3A/gi, ':')
.replace(/%24/g, '$')
.replace(/%2C/gi, ',');
}
/**
* This function should be used to encode both keys and values in a query string key/value. In
* the following URL, you need to call encodeUriQuery on "k" and "v":
*
* http://www.site.org/html;mk=mv?k=v#f
* @param {?} s
* @return {?}
*/
export function encodeUriQuery(s) {
return encodeUriString(s).replace(/%3B/gi, ';');
}
/**
* This function should be used to encode a URL fragment. In the following URL, you need to call
* encodeUriFragment on "f":
*
* http://www.site.org/html;mk=mv?k=v#f
* @param {?} s
* @return {?}
*/
export function encodeUriFragment(s) {
return encodeURI(s);
}
/**
* This function should be run on any URI segment as well as the key and value in a key/value
* pair for matrix params. In the following URL, you need to call encodeUriSegment on "html",
* "mk", and "mv":
*
* http://www.site.org/html;mk=mv?k=v#f
* @param {?} s
* @return {?}
*/
export function encodeUriSegment(s) {
return encodeUriString(s).replace(/\(/g, '%28').replace(/\)/g, '%29').replace(/%26/gi, '&');
}
/**
* @param {?} s
* @return {?}
*/
export function decode(s) {
return decodeURIComponent(s);
}
/**
* @param {?} s
* @return {?}
*/
export function decodeQuery(s) {
return decode(s.replace(/\+/g, '%20'));
}
/**
* @param {?} path
* @return {?}
*/
export function serializePath(path) {
return `${encodeUriSegment(path.path)}${serializeMatrixParams(path.parameters)}`;
}
/**
* @param {?} params
* @return {?}
*/
function serializeMatrixParams(params) {
return Object.keys(params)
.map(key => `;${encodeUriSegment(key)}=${encodeUriSegment(params[key])}`)
.join('');
}
/**
* @param {?} params
* @return {?}
*/
function serializeQueryParams(params) {
/** @type {?} */
const strParams = Object.keys(params).map((name) => {
/** @type {?} */
const value = params[name];
return Array.isArray(value) ?
value.map(v => `${encodeUriQuery(name)}=${encodeUriQuery(v)}`).join('&') :
`${encodeUriQuery(name)}=${encodeUriQuery(value)}`;
});
return strParams.length ? `?${strParams.join("&")}` : '';
}
/** @type {?} */
const SEGMENT_RE = /^[^\/()?;=#]+/;
/**
* @param {?} str
* @return {?}
*/
function matchSegments(str) {
/** @type {?} */
const match = str.match(SEGMENT_RE);
return match ? match[0] : '';
}
/** @type {?} */
const QUERY_PARAM_RE = /^[^=?&#]+/;
/**
* @param {?} str
* @return {?}
*/
function matchQueryParams(str) {
/** @type {?} */
const match = str.match(QUERY_PARAM_RE);
return match ? match[0] : '';
}
/** @type {?} */
const QUERY_PARAM_VALUE_RE = /^[^?&#]+/;
/**
* @param {?} str
* @return {?}
*/
function matchUrlQueryParamValue(str) {
/** @type {?} */
const match = str.match(QUERY_PARAM_VALUE_RE);
return match ? match[0] : '';
}
class UrlParser {
/**
* @param {?} url
*/
constructor(url) {
this.url = url;
this.remaining = url;
}
/**
* @return {?}
*/
parseRootSegment() {
this.consumeOptional('/');
if (this.remaining === '' || this.peekStartsWith('?') || this.peekStartsWith('#')) {
return new UrlSegmentGroup([], {});
}
// The root segment group never has segments
return new UrlSegmentGroup([], this.parseChildren());
}
/**
* @return {?}
*/
parseQueryParams() {
/** @type {?} */
const params = {};
if (this.consumeOptional('?')) {
do {
this.parseQueryParam(params);
} while (this.consumeOptional('&'));
}
return params;
}
/**
* @return {?}
*/
parseFragment() {
return this.consumeOptional('#') ? decodeURIComponent(this.remaining) : null;
}
/**
* @return {?}
*/
parseChildren() {
if (this.remaining === '') {
return {};
}
this.consumeOptional('/');
/** @type {?} */
const segments = [];
if (!this.peekStartsWith('(')) {
segments.push(this.parseSegment());
}
while (this.peekStartsWith('/') && !this.peekStartsWith('//') && !this.peekStartsWith('/(')) {
this.capture('/');
segments.push(this.parseSegment());
}
/** @type {?} */
let children = {};
if (this.peekStartsWith('/(')) {
this.capture('/');
children = this.parseParens(true);
}
/** @type {?} */
let res = {};
if (this.peekStartsWith('(')) {
res = this.parseParens(false);
}
if (segments.length > 0 || Object.keys(children).length > 0) {
res[PRIMARY_OUTLET] = new UrlSegmentGroup(segments, children);
}
return res;
}
/**
* @return {?}
*/
parseSegment() {
/** @type {?} */
const path = matchSegments(this.remaining);
if (path === '' && this.peekStartsWith(';')) {
throw new Error(`Empty path url segment cannot have parameters: '${this.remaining}'.`);
}
this.capture(path);
return new UrlSegment(decode(path), this.parseMatrixParams());
}
/**
* @return {?}
*/
parseMatrixParams() {
/** @type {?} */
const params = {};
while (this.consumeOptional(';')) {
this.parseParam(params);
}
return params;
}
/**
* @param {?} params
* @return {?}
*/
parseParam(params) {
/** @type {?} */
const key = matchSegments(this.remaining);
if (!key) {
return;
}
this.capture(key);
/** @type {?} */
let value = '';
if (this.consumeOptional('=')) {
/** @type {?} */
const valueMatch = matchSegments(this.remaining);
if (valueMatch) {
value = valueMatch;
this.capture(value);
}
}
params[decode(key)] = decode(value);
}
/**
* @param {?} params
* @return {?}
*/
parseQueryParam(params) {
/** @type {?} */
const key = matchQueryParams(this.remaining);
if (!key) {
return;
}
this.capture(key);
/** @type {?} */
let value = '';
if (this.consumeOptional('=')) {
/** @type {?} */
const valueMatch = matchUrlQueryParamValue(this.remaining);
if (valueMatch) {
value = valueMatch;
this.capture(value);
}
}
/** @type {?} */
const decodedKey = decodeQuery(key);
/** @type {?} */
const decodedVal = decodeQuery(value);
if (params.hasOwnProperty(decodedKey)) {
/** @type {?} */
let currentVal = params[decodedKey];
if (!Array.isArray(currentVal)) {
currentVal = [currentVal];
params[decodedKey] = currentVal;
}
currentVal.push(decodedVal);
}
else {
// Create a new value
params[decodedKey] = decodedVal;
}
}
/**
* @param {?} allowPrimary
* @return {?}
*/
parseParens(allowPrimary) {
/** @type {?} */
const segments = {};
this.capture('(');
while (!this.consumeOptional(')') && this.remaining.length > 0) {
/** @type {?} */
const path = matchSegments(this.remaining);
/** @type {?} */
const next = this.remaining[path.length];
// if is is not one of these characters, then the segment was unescaped
// or the group was not closed
if (next !== '/' && next !== ')' && next !== ';') {
throw new Error(`Cannot parse url '${this.url}'`);
}
/** @type {?} */
let outletName = /** @type {?} */ ((undefined));
if (path.indexOf(':') > -1) {
outletName = path.substr(0, path.indexOf(':'));
this.capture(outletName);
this.capture(':');
}
else if (allowPrimary) {
outletName = PRIMARY_OUTLET;
}
/** @type {?} */
const children = this.parseChildren();
segments[outletName] = Object.keys(children).length === 1 ? children[PRIMARY_OUTLET] :
new UrlSegmentGroup([], children);
this.consumeOptional('//');
}
return segments;
}
/**
* @param {?} str
* @return {?}
*/
peekStartsWith(str) { return this.remaining.startsWith(str); }
/**
* @param {?} str
* @return {?}
*/
consumeOptional(str) {
if (this.peekStartsWith(str)) {
this.remaining = this.remaining.substring(str.length);
return true;
}
return false;
}
/**
* @param {?} str
* @return {?}
*/
capture(str) {
if (!this.consumeOptional(str)) {
throw new Error(`Expected "${str}".`);
}
}
}
if (false) {
/** @type {?} */
UrlParser.prototype.remaining;
/** @type {?} */
UrlParser.prototype.url;
}
//# 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All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {PRIMARY_OUTLET, ParamMap, Params, convertToParamMap} from './shared';\nimport {forEach, shallowEqual} from './utils/collection';\n\nexport function createEmptyUrlTree() {\n  return new UrlTree(new UrlSegmentGroup([], {}), {}, null);\n}\n\nexport function containsTree(container: UrlTree, containee: UrlTree, exact: boolean): boolean {\n  if (exact) {\n    return equalQueryParams(container.queryParams, containee.queryParams) &&\n        equalSegmentGroups(container.root, containee.root);\n  }\n\n  return containsQueryParams(container.queryParams, containee.queryParams) &&\n      containsSegmentGroup(container.root, containee.root);\n}\n\nfunction equalQueryParams(container: Params, containee: Params): boolean {\n  // TODO: This does not handle array params correctly.\n  return shallowEqual(container, containee);\n}\n\nfunction equalSegmentGroups(container: UrlSegmentGroup, containee: UrlSegmentGroup): boolean {\n  if (!equalPath(container.segments, containee.segments)) return false;\n  if (container.numberOfChildren !== containee.numberOfChildren) return false;\n  for (const c in containee.children) {\n    if (!container.children[c]) return false;\n    if (!equalSegmentGroups(container.children[c], containee.children[c])) return false;\n  }\n  return true;\n}\n\nfunction containsQueryParams(container: Params, containee: Params): boolean {\n  // TODO: This does not handle array params correctly.\n  return Object.keys(containee).length <= Object.keys(container).length &&\n      Object.keys(containee).every(key => containee[key] === container[key]);\n}\n\nfunction containsSegmentGroup(container: UrlSegmentGroup, containee: UrlSegmentGroup): boolean {\n  return containsSegmentGroupHelper(container, containee, containee.segments);\n}\n\nfunction containsSegmentGroupHelper(\n    container: UrlSegmentGroup, containee: UrlSegmentGroup, containeePaths: UrlSegment[]): boolean {\n  if (container.segments.length > containeePaths.length) {\n    const current = container.segments.slice(0, containeePaths.length);\n    if (!equalPath(current, containeePaths)) return false;\n    if (containee.hasChildren()) return false;\n    return true;\n\n  } else if (container.segments.length === containeePaths.length) {\n    if (!equalPath(container.segments, containeePaths)) return false;\n    for (const c in containee.children) {\n      if (!container.children[c]) return false;\n      if (!containsSegmentGroup(container.children[c], containee.children[c])) return false;\n    }\n    return true;\n\n  } else {\n    const current = containeePaths.slice(0, container.segments.length);\n    const next = containeePaths.slice(container.segments.length);\n    if (!equalPath(container.segments, current)) return false;\n    if (!container.children[PRIMARY_OUTLET]) return false;\n    return containsSegmentGroupHelper(container.children[PRIMARY_OUTLET], containee, next);\n  }\n}\n\n/**\n * @description\n *\n * Represents the parsed URL.\n *\n * Since a router state is a tree, and the URL is nothing but a serialized state, the URL is a\n * serialized tree.\n * UrlTree is a data structure that provides a lot of affordances in dealing with URLs\n *\n * @usageNotes\n * ### Example\n *\n * ```\n * @Component({templateUrl:'template.html'})\n * class MyComponent {\n *   constructor(router: Router) {\n *     const tree: UrlTree =\n *       router.parseUrl('/team/33/(user/victor//support:help)?debug=true#fragment');\n *     const f = tree.fragment; // return 'fragment'\n *     const q = tree.queryParams; // returns {debug: 'true'}\n *     const g: UrlSegmentGroup = tree.root.children[PRIMARY_OUTLET];\n *     const s: UrlSegment[] = g.segments; // returns 2 segments 'team' and '33'\n *     g.children[PRIMARY_OUTLET].segments; // returns 2 segments 'user' and 'victor'\n *     g.children['support'].segments; // return 1 segment 'help'\n *   }\n * }\n * ```\n *\n * @publicApi\n */\nexport class UrlTree {\n  /** @internal */\n  // TODO(issue/24571): remove '!'.\n  _queryParamMap !: ParamMap;\n\n  /** @internal */\n  constructor(\n      /** The root segment group of the URL tree */\n      public root: UrlSegmentGroup,\n      /** The query params of the URL */\n      public queryParams: Params,\n      /** The fragment of the URL */\n      public fragment: string|null) {}\n\n  get queryParamMap(): ParamMap {\n    if (!this._queryParamMap) {\n      this._queryParamMap = convertToParamMap(this.queryParams);\n    }\n    return this._queryParamMap;\n  }\n\n  /** @docsNotRequired */\n  toString(): string { return DEFAULT_SERIALIZER.serialize(this); }\n}\n\n/**\n * @description\n *\n * Represents the parsed URL segment group.\n *\n * See `UrlTree` for more information.\n *\n * @publicApi\n */\nexport class UrlSegmentGroup {\n  /** @internal */\n  // TODO(issue/24571): remove '!'.\n  _sourceSegment !: UrlSegmentGroup;\n  /** @internal */\n  // TODO(issue/24571): remove '!'.\n  _segmentIndexShift !: number;\n  /** The parent node in the url tree */\n  parent: UrlSegmentGroup|null = null;\n\n  constructor(\n      /** The URL segments of this group. See `UrlSegment` for more information */\n      public segments: UrlSegment[],\n      /** The list of children of this group */\n      public children: {[key: string]: UrlSegmentGroup}) {\n    forEach(children, (v: any, k: any) => v.parent = this);\n  }\n\n  /** Whether the segment has child segments */\n  hasChildren(): boolean { return this.numberOfChildren > 0; }\n\n  /** Number of child segments */\n  get numberOfChildren(): number { return Object.keys(this.children).length; }\n\n  /** @docsNotRequired */\n  toString(): string { return serializePaths(this); }\n}\n\n\n/**\n * @description\n *\n * Represents a single URL segment.\n *\n * A UrlSegment is a part of a URL between the two slashes. It contains a path and the matrix\n * parameters associated with the segment.\n *\n * @usageNotes\n * ### Example\n *\n * ```\n * @Component({templateUrl:'temp