Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
_ExternalSpecifications |
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| 3.6666666666666665;3.667 |
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 javax.faces.validator; | |
20 | ||
21 | import java.util.logging.Level; | |
22 | import java.util.logging.Logger; | |
23 | ||
24 | import javax.el.ELContext; | |
25 | ||
26 | /** | |
27 | * <p> | |
28 | * Package-private utility class for determining which specifications are available | |
29 | * in the current process. See JIRA issue: http://issues.apache.org/jira/browse/MYFACES-2386 | |
30 | * </p> | |
31 | * | |
32 | * @since 2.0 | |
33 | */ | |
34 | final class _ExternalSpecifications | |
35 | { | |
36 | ||
37 | //private static final Log log = LogFactory.getLog(BeanValidator.class); | |
38 | 0 | private static final Logger log = Logger.getLogger(_ExternalSpecifications.class.getName()); |
39 | ||
40 | private static volatile Boolean beanValidationAvailable; | |
41 | private static volatile Boolean unifiedELAvailable; | |
42 | ||
43 | /** | |
44 | * This method determines if Bean Validation is present. | |
45 | * | |
46 | * Eager initialization is used for performance. This means Bean Validation binaries | |
47 | * should not be added at runtime after this variable has been set. | |
48 | * @return true if Bean Validation is available, false otherwise. | |
49 | */ | |
50 | public static boolean isBeanValidationAvailable() | |
51 | { | |
52 | 0 | if (beanValidationAvailable == null) |
53 | { | |
54 | try | |
55 | { | |
56 | try | |
57 | { | |
58 | 0 | beanValidationAvailable = (Class.forName("javax.validation.Validation") != null); |
59 | } | |
60 | 0 | catch(ClassNotFoundException e) |
61 | { | |
62 | 0 | beanValidationAvailable = Boolean.FALSE; |
63 | 0 | } |
64 | ||
65 | 0 | if (beanValidationAvailable) |
66 | { | |
67 | try | |
68 | { | |
69 | // Trial-error approach to check for Bean Validation impl existence. | |
70 | // If any Exception occurs here, we assume that Bean Validation is not available. | |
71 | // The cause may be anything, i.e. NoClassDef, config error... | |
72 | 0 | _ValidationUtils.tryBuildDefaultValidatorFactory(); |
73 | } | |
74 | 0 | catch (Throwable t) |
75 | { | |
76 | 0 | log.log(Level.FINE, "Error initializing Bean Validation (could be normal)", t); |
77 | 0 | beanValidationAvailable = false; |
78 | 0 | } |
79 | } | |
80 | } | |
81 | 0 | catch (Throwable t) |
82 | { | |
83 | 0 | log.log(Level.FINE, "Error loading class (could be normal)", t); |
84 | 0 | beanValidationAvailable = false; |
85 | 0 | } |
86 | ||
87 | //log.info("MyFaces Bean Validation support " + (beanValidationAvailable ? "enabled" : "disabled")); | |
88 | } | |
89 | 0 | return beanValidationAvailable; |
90 | } | |
91 | ||
92 | /** | |
93 | * This method determines if Unified EL is present. | |
94 | * | |
95 | * Eager initialization is used for performance. This means Unified EL binaries | |
96 | * should not be added at runtime after this variable has been set. | |
97 | * @return true if UEL is available, false otherwise. | |
98 | */ | |
99 | public static boolean isUnifiedELAvailable() | |
100 | { | |
101 | 0 | if (unifiedELAvailable == null) |
102 | { | |
103 | try | |
104 | { | |
105 | // Check if the UEL classes are available. | |
106 | // If the JSP EL classes are loaded first, UEL will not work | |
107 | // properly, hence it will be disabled. | |
108 | 0 | unifiedELAvailable = ( |
109 | Class.forName("javax.el.ValueReference") != null | |
110 | && Class.forName("javax.el.ValueExpression") | |
111 | .getMethod("getValueReference", ELContext.class) != null | |
112 | ); | |
113 | } | |
114 | 0 | catch (Throwable t) |
115 | { | |
116 | 0 | log.log(Level.FINE, "Error loading class (could be normal)", t); |
117 | 0 | unifiedELAvailable = false; |
118 | 0 | } |
119 | ||
120 | //log.info("MyFaces Unified EL support " + (unifiedELAvailable ? "enabled" : "disabled")); | |
121 | } | |
122 | 0 | return unifiedELAvailable; |
123 | } | |
124 | ||
125 | /** | |
126 | * this class should not be instantiated. | |
127 | */ | |
128 | private _ExternalSpecifications() | |
129 | 0 | { |
130 | 0 | } |
131 | ||
132 | } |