Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2018-present Open Networking Foundation |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.store.service; |
| 17 | |
| 18 | import java.util.concurrent.CompletableFuture; |
| 19 | |
| 20 | /** |
| 21 | * Asynchronous iterator. |
| 22 | */ |
| 23 | public interface AsyncIterator<T> { |
| 24 | |
| 25 | /** |
| 26 | * Returns whether the iterator has a next item. |
| 27 | * |
| 28 | * @return whether a next item exists in the iterator |
| 29 | */ |
| 30 | CompletableFuture<Boolean> hasNext(); |
| 31 | |
| 32 | /** |
| 33 | * Returns the next item in the iterator. |
| 34 | * |
| 35 | * @return the next item in the iterator |
| 36 | */ |
| 37 | CompletableFuture<T> next(); |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 38 | } |