1 /*
2 * #%L
3 * LegacyStreamCallbackAdapter.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.MongoCollection;
25 import com.allanbank.mongodb.StreamCallback;
26 import com.allanbank.mongodb.bson.Document;
27
28 /**
29 * LegacyStreamCallbackAdapter provides an adapter from a {@link Callback} to a
30 * {@link StreamCallback}. This adapter simulates the old behaviour specified in
31 * the
32 * {@link MongoCollection#streamingFind(Callback, com.allanbank.mongodb.bson.DocumentAssignable)}
33 * and
34 * {@link MongoCollection#streamingFind(Callback, com.allanbank.mongodb.builder.Find)}
35 * using the new interface.
36 *
37 * @api.no This class is <b>NOT</b> part of the drivers API. This class may be
38 * mutated in incompatible ways between any two releases of the driver.
39 * @deprecated Deprecated to ensure this class is removed with the
40 * {@link MongoCollection#streamingFind(Callback, com.allanbank.mongodb.bson.DocumentAssignable)}
41 * and
42 * {@link MongoCollection#streamingFind(Callback, com.allanbank.mongodb.builder.Find)}
43 * methods.
44 * @copyright 2013, Allanbank Consulting, Inc., All Rights Reserved
45 */
46 @Deprecated
47 public final class LegacyStreamCallbackAdapter implements
48 StreamCallback<Document> {
49
50 /** The legacy callback to delegate to. */
51 private final Callback<Document> myDelegate;
52
53 /**
54 * Creates a new LegacyStreamCallbackAdapter.
55 *
56 * @param delegate
57 * The legacy callback to delegate to.
58 */
59 public LegacyStreamCallbackAdapter(final Callback<Document> delegate) {
60 myDelegate = delegate;
61 }
62
63 /**
64 * {@inheritDoc}
65 * <p>
66 * Overridden to forward to the legacy {@link Callback#callback}.
67 * </p>
68 */
69 @Override
70 public void callback(final Document result) {
71 myDelegate.callback(result);
72 }
73
74 /**
75 * {@inheritDoc}
76 * <p>
77 * Overridden to forward to {@link Callback#callback callback(null)}.
78 * </p>
79 */
80 @Override
81 public void done() {
82 myDelegate.callback(null);
83 }
84
85 /**
86 * {@inheritDoc}
87 * <p>
88 * Overridden to forward to the legacy {@link Callback#exception}.
89 * </p>
90 */
91 @Override
92 public void exception(final Throwable thrown) {
93 myDelegate.exception(thrown);
94 }
95 }