| /* |
| * Copyright (C) 2022 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.android.quicksearchbox.util |
| |
| /** |
| * Interface for an object that may be constructed asynchronously. In cases when the object is ready |
| * (on constructible) immediately, it provides synchronous access to it. Otherwise, the object can |
| * be sent to a [Consumer] later. |
| */ |
| interface NowOrLater<C> { |
| /** Indicates if the object is ready (or constructible synchronously). */ |
| fun haveNow(): Boolean |
| |
| /** |
| * Gets the object now. Should only be called if [.haveNow] returns `true`, otherwise an |
| * [IllegalStateException] will be thrown. |
| */ |
| val now: C |
| |
| /** |
| * Request the object asynchronously. This can be called even if the object is ready now, in which |
| * case the callback may be made in context. The thread on which the consumer is called back |
| * depends on the implementation. |
| */ |
| fun getLater(consumer: Consumer<in C>?) |
| } |