1 /*
2 * Copyright 2009-2021 the original author or authors.
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.apache.ibatis.reflection;
17
18 import org.apache.ibatis.io.Resources;
19
20 /**
21 * To check the existence of version dependent classes.
22 */
23 public class Jdk {
24
25 /**
26 * <code>true</code> if <code>java.lang.reflect.Parameter</code> is available.
27 * @deprecated Since 3.5.0, Will remove this field at feature(next major version up)
28 */
29 @Deprecated
30 public static final boolean parameterExists;
31
32 static {
33 boolean available = false;
34 try {
35 Resources.classForName("java.lang.reflect.Parameter");
36 available = true;
37 } catch (ClassNotFoundException e) {
38 // ignore
39 }
40 parameterExists = available;
41 }
42
43 /**
44 * @deprecated Since 3.5.0, Will remove this field at feature(next major version up)
45 */
46 @Deprecated
47 public static final boolean dateAndTimeApiExists;
48
49 static {
50 boolean available = false;
51 try {
52 Resources.classForName("java.time.Clock");
53 available = true;
54 } catch (ClassNotFoundException e) {
55 // ignore
56 }
57 dateAndTimeApiExists = available;
58 }
59
60 /**
61 * @deprecated Since 3.5.0, Will remove this field at feature(next major version up)
62 */
63 @Deprecated
64 public static final boolean optionalExists;
65
66 static {
67 boolean available = false;
68 try {
69 Resources.classForName("java.util.Optional");
70 available = true;
71 } catch (ClassNotFoundException e) {
72 // ignore
73 }
74 optionalExists = available;
75 }
76
77 private Jdk() {
78 super();
79 }
80 }