Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
SingleDocumentCallback |
|
| 2.0;2 |
1 | /* | |
2 | * #%L | |
3 | * SingleDocumentCallback.java - mongodb-async-driver - Allanbank Consulting, Inc. | |
4 | * %% | |
5 | * Copyright (C) 2011 - 2014 Allanbank Consulting, Inc. | |
6 | * %% | |
7 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
8 | * you may not use this file except in compliance with the License. | |
9 | * You may obtain a copy of the License at | |
10 | * | |
11 | * http://www.apache.org/licenses/LICENSE-2.0 | |
12 | * | |
13 | * Unless required by applicable law or agreed to in writing, software | |
14 | * distributed under the License is distributed on an "AS IS" BASIS, | |
15 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
16 | * See the License for the specific language governing permissions and | |
17 | * limitations under the License. | |
18 | * #L% | |
19 | */ | |
20 | ||
21 | package com.allanbank.mongodb.client.callback; | |
22 | ||
23 | import com.allanbank.mongodb.Callback; | |
24 | import com.allanbank.mongodb.MongoDbException; | |
25 | import com.allanbank.mongodb.bson.Document; | |
26 | import com.allanbank.mongodb.client.MongoIteratorImpl; | |
27 | import com.allanbank.mongodb.client.message.Reply; | |
28 | ||
29 | /** | |
30 | * Callback to convert a {@link Reply} into a single document. | |
31 | * | |
32 | * @api.no This class is <b>NOT</b> part of the drivers API. This class may be | |
33 | * mutated in incompatible ways between any two releases of the driver. | |
34 | * @copyright 2011-2013, Allanbank Consulting, Inc., All Rights Reserved | |
35 | */ | |
36 | 26 | public final class SingleDocumentCallback extends |
37 | AbstractReplyCallback<Document> { | |
38 | ||
39 | /** | |
40 | * Create a new CursorCallback. | |
41 | * | |
42 | * @param results | |
43 | * The callback to update once the first set of results are | |
44 | * ready. | |
45 | */ | |
46 | public SingleDocumentCallback(final Callback<Document> results) { | |
47 | 36 | super(results); |
48 | 36 | } |
49 | ||
50 | /** | |
51 | * {@inheritDoc} | |
52 | * <p> | |
53 | * Overridden to construct a {@link MongoIteratorImpl} around the reply. | |
54 | * </p> | |
55 | * | |
56 | * @see AbstractReplyCallback#convert(Reply) | |
57 | */ | |
58 | @Override | |
59 | protected Document convert(final Reply reply) throws MongoDbException { | |
60 | 26 | if (!reply.getResults().isEmpty()) { |
61 | 22 | return reply.getResults().get(0); |
62 | } | |
63 | 4 | return null; |
64 | } | |
65 | } |