1 /*
2 * #%L
3 * Assertions.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.util;
22
23 /**
24 * Assertions provides common validation methods for the driver.
25 *
26 * @api.no This class is <b>NOT</b> part of the drivers API. This class may be
27 * mutated in incompatible ways between any two releases of the driver.
28 * @copyright 2012-2013, Allanbank Consulting, Inc., All Rights Reserved
29 */
30 public class Assertions {
31
32 /**
33 * Throws an {@link IllegalArgumentException} if the {@code value} is
34 * <code>null</code> or an empty string.
35 *
36 * @param value
37 * The value to test.
38 * @param message
39 * The message for the exception to throw.
40 * @throws IllegalArgumentException
41 * In the case that the {@code value} is <code>null</code>.
42 */
43 public static void assertNotEmpty(final String value, final String message)
44 throws IllegalArgumentException {
45 if ((value == null) || value.trim().isEmpty()) {
46 throw new IllegalArgumentException(message);
47 }
48 }
49
50 /**
51 * Throws an {@link IllegalArgumentException} if the {@code value} is
52 * <code>null</code>.
53 *
54 * @param value
55 * The value to test.
56 * @param message
57 * The message for the exception to throw.
58 * @throws IllegalArgumentException
59 * In the case that the {@code value} is <code>null</code>.
60 */
61 public static void assertNotNull(final Object value, final String message)
62 throws IllegalArgumentException {
63 if (value == null) {
64 throw new IllegalArgumentException(message);
65 }
66 }
67
68 /**
69 * Throws an {@link IllegalArgumentException} if the {@code value} is
70 * <code>null</code>.
71 *
72 * @param mustBeTrue
73 * The value to test.
74 * @param message
75 * The message for the exception to throw.
76 * @throws IllegalArgumentException
77 * In the case that the {@code value} is <code>null</code>.
78 */
79 public static void assertThat(final boolean mustBeTrue, final String message)
80 throws IllegalArgumentException {
81 if (!mustBeTrue) {
82 throw new IllegalArgumentException(message);
83 }
84 }
85
86 /**
87 * Creates a new Assertions.
88 */
89 private Assertions() {
90 // Static class.
91 }
92 }