@angular/core
Version:
Angular - the core framework
73 lines • 9.29 kB
JavaScript
/**
* @license
* Copyright Google LLC 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 { RuntimeError } from '../../errors';
import { ReflectionCapabilities } from '../../reflection/reflection_capabilities';
import { Host, Inject, Optional, Self, SkipSelf } from '../metadata';
import { Attribute } from '../metadata_attr';
let _reflect = null;
export function getReflect() {
return (_reflect = _reflect || new ReflectionCapabilities());
}
export function reflectDependencies(type) {
return convertDependencies(getReflect().parameters(type));
}
export function convertDependencies(deps) {
return deps.map(dep => reflectDependency(dep));
}
function reflectDependency(dep) {
const meta = {
token: null,
attribute: null,
host: false,
optional: false,
self: false,
skipSelf: false,
};
if (Array.isArray(dep) && dep.length > 0) {
for (let j = 0; j < dep.length; j++) {
const param = dep[j];
if (param === undefined) {
// param may be undefined if type of dep is not set by ngtsc
continue;
}
const proto = Object.getPrototypeOf(param);
if (param instanceof Optional || proto.ngMetadataName === 'Optional') {
meta.optional = true;
}
else if (param instanceof SkipSelf || proto.ngMetadataName === 'SkipSelf') {
meta.skipSelf = true;
}
else if (param instanceof Self || proto.ngMetadataName === 'Self') {
meta.self = true;
}
else if (param instanceof Host || proto.ngMetadataName === 'Host') {
meta.host = true;
}
else if (param instanceof Inject) {
meta.token = param.token;
}
else if (param instanceof Attribute) {
if (param.attributeName === undefined) {
throw new RuntimeError(204 /* RuntimeErrorCode.INVALID_INJECTION_TOKEN */, ngDevMode && `Attribute name must be defined.`);
}
meta.attribute = param.attributeName;
}
else {
meta.token = param;
}
}
}
else if (dep === undefined || (Array.isArray(dep) && dep.length === 0)) {
meta.token = null;
}
else {
meta.token = dep;
}
return meta;
}
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QgaiA9IDA7IGogPCBkZXAubGVuZ3RoOyBqKyspIHtcbiAgICAgIGNvbnN0IHBhcmFtID0gZGVwW2pdO1xuICAgICAgaWYgKHBhcmFtID09PSB1bmRlZmluZWQpIHtcbiAgICAgICAgLy8gcGFyYW0gbWF5IGJlIHVuZGVmaW5lZCBpZiB0eXBlIG9mIGRlcCBpcyBub3Qgc2V0IGJ5IG5ndHNjXG4gICAgICAgIGNvbnRpbnVlO1xuICAgICAgfVxuXG4gICAgICBjb25zdCBwcm90byA9IE9iamVjdC5nZXRQcm90b3R5cGVPZihwYXJhbSk7XG5cbiAgICAgIGlmIChwYXJhbSBpbnN0YW5jZW9mIE9wdGlvbmFsIHx8IHByb3RvLm5nTWV0YWRhdGFOYW1lID09PSAnT3B0aW9uYWwnKSB7XG4gICAgICAgIG1ldGEub3B0aW9uYWwgPSB0cnVlO1xuICAgICAgfSBlbHNlIGlmIChwYXJhbSBpbnN0YW5jZW9mIFNraXBTZWxmIHx8IHByb3RvLm5nTWV0YWRhdGFOYW1lID09PSAnU2tpcFNlbGYnKSB7XG4gICAgICAgIG1ldGEuc2tpcFNlbGYgPSB0cnVlO1xuICAgICAgfSBlbHNlIGlmIChwYXJhbSBpbnN0YW5jZW9mIFNlbGYgfHwgcHJvdG8ubmdNZXRhZGF0YU5hbWUgPT09ICdTZWxmJykge1xuICAgICAgICBtZXRhLnNlbGYgPSB0cnVlO1xuICAgICAgfSBlbHNlIGlmIChwYXJhbSBpbnN0YW5jZW9mIEhvc3QgfHwgcHJvdG8ubmdNZXRhZGF0YU5hbWUgPT09ICdIb3N0Jykge1xuICAgICAgICBtZXRhLmhvc3QgPSB0cnVlO1xuICAgICAgfSBlbHNlIGlmIChwYXJhbSBpbnN0YW5jZW9mIEluamVjdCkge1xuICAgICAgICBtZXRhLnRva2VuID0gcGFyYW0udG9rZW47XG4gICAgICB9IGVsc2UgaWYgKHBhcmFtIGluc3RhbmNlb2YgQXR0cmlidXRlKSB7XG4gICAgICAgIGlmIChwYXJhbS5hdHRyaWJ1dGVOYW1lID09PSB1bmRlZmluZWQpIHtcbiAgICAgICAgICB0aHJvdyBuZXcgUnVudGltZUVycm9yKFxuICAgICAgICAgICAgICBSdW50aW1lRXJyb3JDb2RlLklOVkFMSURfSU5KRUNUSU9OX1RPS0VOLFxuICAgICAgICAgICAgICBuZ0Rldk1vZGUgJiYgYEF0dHJpYnV0ZSBuYW1lIG11c3QgYmUgZGVmaW5lZC5gKTtcbiAgICAgICAgfVxuICAgICAgICBtZXRhLmF0dHJpYnV0ZSA9IHBhcmFtLmF0dHJpYnV0ZU5hbWU7XG4gICAgICB9IGVsc2Uge1xuICAgICAgICBtZXRhLnRva2VuID0gcGFyYW07XG4gICAgICB9XG4gICAgfVxuICB9IGVsc2UgaWYgKGRlcCA9PT0gdW5kZWZpbmVkIHx8IChBcnJheS5pc0FycmF5KGRlcCkgJiYgZGVwLmxlbmd0aCA9PT0gMCkpIHtcbiAgICBtZXRhLnRva2VuID0gbnVsbDtcbiAgfSBlbHNlIHtcbiAgICBtZXRhLnRva2VuID0gZGVwO1xuICB9XG4gIHJldHVybiBtZXRhO1xufVxuIl19