| 1 | /**
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| 2 | * @license
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| 3 | * Copyright Google Inc. All Rights Reserved.
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| 4 | *
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| 5 | * Use of this source code is governed by an MIT-style license that can be
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| 6 | * found in the LICENSE file at https://angular.io/license
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| 7 | */
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| 8 | /**
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| 9 | * A unique object used for retrieving items from the {@link ReflectiveInjector}.
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| 10 | *
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| 11 | * Keys have:
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| 12 | * - a system-wide unique `id`.
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| 13 | * - a `token`.
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| 14 | *
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| 15 | * `Key` is used internally by {@link ReflectiveInjector} because its system-wide unique `id` allows
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| 16 | * the
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| 17 | * injector to store created objects in a more efficient way.
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| 18 | *
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| 19 | * `Key` should not be created directly. {@link ReflectiveInjector} creates keys automatically when
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| 20 | * resolving
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| 21 | * providers.
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| 22 | * @experimental
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| 23 | */
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| 24 | export declare class ReflectiveKey {
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| 25 | token: Object;
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| 26 | id: number;
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| 27 | /**
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| 28 | * Private
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| 29 | */
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| 30 | constructor(token: Object, id: number);
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| 31 | /**
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| 32 | * Returns a stringified token.
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| 33 | */
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| 34 | get displayName(): string;
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| 35 | /**
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| 36 | * Retrieves a `Key` for a token.
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| 37 | */
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| 38 | static get(token: Object): ReflectiveKey;
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| 39 | /**
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| 40 | * @returns the number of keys registered in the system.
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| 41 | */
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| 42 | static get numberOfKeys(): number;
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| 43 | }
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