Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
JavaEnvironment |
|
| 1.0;1 |
1 | /* | |
2 | * Licensed to the Apache Software Foundation (ASF) under one | |
3 | * or more contributor license agreements. See the NOTICE file | |
4 | * distributed with this work for additional information | |
5 | * regarding copyright ownership. The ASF licenses this file | |
6 | * to you under the Apache License, Version 2.0 (the | |
7 | * "License"); you may not use this file except in compliance | |
8 | * with the License. You may obtain a copy of the License at | |
9 | * | |
10 | * http://www.apache.org/licenses/LICENSE-2.0 | |
11 | * | |
12 | * Unless required by applicable law or agreed to in writing, | |
13 | * software distributed under the License is distributed on an | |
14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
15 | * KIND, either express or implied. See the License for the | |
16 | * specific language governing permissions and limitations | |
17 | * under the License. | |
18 | */ | |
19 | package org.apache.shiro.util; | |
20 | ||
21 | /** | |
22 | * Internal helper class used to find the Java/JDK version | |
23 | * that Shiro is operating within, to allow for automatically | |
24 | * adapting to the present platform's capabilities. | |
25 | * | |
26 | * <p>Note that Shiro does not support 1.2 or earlier JVMs - only 1.3 and later. | |
27 | * | |
28 | * <p><em>This class was borrowed and heavily based upon a nearly identical version found in | |
29 | * the <a href="http://www.springframework.org/">Spring Framework</a>, with minor modifications. | |
30 | * The original author names and copyright (Apache 2.0) has been left in place. A special | |
31 | * thanks to Rod Johnson, Juergen Hoeller, and Rick Evans for making this available.</em> | |
32 | * | |
33 | * @since 0.2 | |
34 | */ | |
35 | 0 | public abstract class JavaEnvironment { |
36 | ||
37 | /** | |
38 | * Constant identifying the 1.3.x JVM (JDK 1.3). | |
39 | */ | |
40 | public static final int JAVA_13 = 0; | |
41 | ||
42 | /** | |
43 | * Constant identifying the 1.4.x JVM (J2SE 1.4). | |
44 | */ | |
45 | public static final int JAVA_14 = 1; | |
46 | ||
47 | /** | |
48 | * Constant identifying the 1.5 JVM (Java 5). | |
49 | */ | |
50 | public static final int JAVA_15 = 2; | |
51 | ||
52 | /** | |
53 | * Constant identifying the 1.6 JVM (Java 6). | |
54 | */ | |
55 | public static final int JAVA_16 = 3; | |
56 | ||
57 | /** | |
58 | * Constant identifying the 1.7 JVM. | |
59 | */ | |
60 | public static final int JAVA_17 = 4; | |
61 | ||
62 | /** | |
63 | * Constant identifying the 1.8 JVM. | |
64 | */ | |
65 | public static final int JAVA_18 = 5; | |
66 | ||
67 | /** The virtual machine version, i.e. <code>System.getProperty("java.version");</code>. */ | |
68 | private static final String version; | |
69 | ||
70 | /** | |
71 | * The virtual machine <em>major</em> version. For example, with a <code>version</code> of | |
72 | * <code>1.5.6_10</code>, this would be <code>1.5</code> | |
73 | */ | |
74 | private static final int majorVersion; | |
75 | ||
76 | /** | |
77 | * Static code initialization block that sets the | |
78 | * <code>version</code> and <code>majorVersion</code> Class constants | |
79 | * upon initialization. | |
80 | */ | |
81 | static { | |
82 | 0 | version = System.getProperty("java.version"); |
83 | // version String should look like "1.4.2_10" | |
84 | ||
85 | // NOTE: JDK 1.9 will be versioned differently '9' and/or 9.x.x | |
86 | // https://blogs.oracle.com/java-platform-group/entry/a_new_jdk_9_version | |
87 | ||
88 | 0 | if (version.contains("1.8.")) { |
89 | 0 | majorVersion = JAVA_18; |
90 | 0 | } else if (version.contains("1.7.")) { |
91 | 0 | majorVersion = JAVA_17; |
92 | 0 | } else if (version.contains("1.6.")) { |
93 | 0 | majorVersion = JAVA_16; |
94 | 0 | } else if (version.contains("1.5.")) { |
95 | 0 | majorVersion = JAVA_15; |
96 | 0 | } else if (version.contains("1.4.")) { |
97 | 0 | majorVersion = JAVA_14; |
98 | } else { | |
99 | // else leave 1.3 as default (it's either 1.3 or unknown) | |
100 | 0 | majorVersion = JAVA_13; |
101 | } | |
102 | 0 | } |
103 | ||
104 | ||
105 | /** | |
106 | * Return the full Java version string, as returned by | |
107 | * <code>System.getProperty("java.version")</code>. | |
108 | * | |
109 | * @return the full Java version string | |
110 | * @see System#getProperty(String) | |
111 | */ | |
112 | public static String getVersion() { | |
113 | 0 | return version; |
114 | } | |
115 | ||
116 | /** | |
117 | * Get the major version code. This means we can do things like | |
118 | * <code>if (getMajorVersion() < JAVA_14)</code>. | |
119 | * | |
120 | * @return a code comparable to the JAVA_XX codes in this class | |
121 | * @see #JAVA_13 | |
122 | * @see #JAVA_14 | |
123 | * @see #JAVA_15 | |
124 | * @see #JAVA_16 | |
125 | * @see #JAVA_17 | |
126 | * @see #JAVA_18 | |
127 | */ | |
128 | public static int getMajorVersion() { | |
129 | 0 | return majorVersion; |
130 | } | |
131 | ||
132 | /** | |
133 | * Convenience method to determine if the current JVM is at least Java 1.4. | |
134 | * | |
135 | * @return <code>true</code> if the current JVM is at least Java 1.4 | |
136 | * @see #getMajorVersion() | |
137 | * @see #JAVA_14 | |
138 | * @see #JAVA_15 | |
139 | * @see #JAVA_16 | |
140 | * @see #JAVA_17 | |
141 | * @see #JAVA_18 | |
142 | */ | |
143 | public static boolean isAtLeastVersion14() { | |
144 | 0 | return getMajorVersion() >= JAVA_14; |
145 | } | |
146 | ||
147 | /** | |
148 | * Convenience method to determine if the current JVM is at least | |
149 | * Java 1.5 (Java 5). | |
150 | * | |
151 | * @return <code>true</code> if the current JVM is at least Java 1.5 | |
152 | * @see #getMajorVersion() | |
153 | * @see #JAVA_15 | |
154 | * @see #JAVA_16 | |
155 | * @see #JAVA_17 | |
156 | * @see #JAVA_18 | |
157 | */ | |
158 | public static boolean isAtLeastVersion15() { | |
159 | 0 | return getMajorVersion() >= JAVA_15; |
160 | } | |
161 | ||
162 | /** | |
163 | * Convenience method to determine if the current JVM is at least | |
164 | * Java 1.6 (Java 6). | |
165 | * | |
166 | * @return <code>true</code> if the current JVM is at least Java 1.6 | |
167 | * @see #getMajorVersion() | |
168 | * @see #JAVA_15 | |
169 | * @see #JAVA_16 | |
170 | * @see #JAVA_17 | |
171 | * @see #JAVA_18 | |
172 | * | |
173 | * @since 1.2 | |
174 | */ | |
175 | public static boolean isAtLeastVersion16() { | |
176 | 0 | return getMajorVersion() >= JAVA_16; |
177 | } | |
178 | } |