1 /*
2 * #%L
3 * LongToIntCallback.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
25 /**
26 * LongToIntCallback provides a simple callback wrapper to convert the long
27 * value to an integer.
28 *
29 * @api.no This class is <b>NOT</b> part of the drivers API. This class may be
30 * mutated in incompatible ways between any two releases of the driver.
31 * @copyright 2012-2013, Allanbank Consulting, Inc., All Rights Reserved
32 */
33 public class LongToIntCallback implements Callback<Long> {
34
35 /** The delegate callback to forward the integer result to. */
36 private final Callback<Integer> myDelegate;
37
38 /**
39 * Creates a new LongToIntCallback.
40 *
41 * @param delegate
42 * The delegate callback to forward the integer result to.
43 */
44 public LongToIntCallback(final Callback<Integer> delegate) {
45 myDelegate = delegate;
46 }
47
48 /**
49 * {@inheritDoc}
50 * <p>
51 * Overridden to cast the Long to an integer and foward to the delegate
52 * callback.
53 * </p>
54 */
55 @Override
56 public void callback(final Long result) {
57 myDelegate.callback(Integer.valueOf(result.intValue()));
58 }
59
60 /**
61 * {@inheritDoc}
62 * <p>
63 * Overridden to forward the exception to the delegate callback.
64 * </p>
65 */
66 @Override
67 public void exception(final Throwable thrown) {
68 myDelegate.exception(thrown);
69 }
70 }