1 /*
2 * Copyright 2010-2013 smartics, Kronseder & Reiner GmbH
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 de.smartics.testdoc.report.resource;
17
18 import java.util.Locale;
19 import java.util.ServiceLoader;
20
21 /**
22 * Service loader to load category resource descriptors.
23 *
24 * @author <a href="mailto:robert.reiner@smartics.de">Robert Reiner</a>
25 * @version $Revision:591 $
26 */
27 public final class CategoryResourceLoader
28 {
29 // ********************************* Fields *********************************
30
31 // --- constants ------------------------------------------------------------
32
33 /**
34 * The singleton instance of the resource loader.
35 */
36 public static final CategoryResourceLoader INSTANCE =
37 new CategoryResourceLoader();
38
39 // --- members --------------------------------------------------------------
40
41 /**
42 * The internal service loader.
43 */
44 private final ServiceLoader<CategoryResourceProvider> loader = ServiceLoader
45 .load(CategoryResourceProvider.class);
46
47 // ****************************** Initializer *******************************
48
49 // ****************************** Constructors ******************************
50
51 /**
52 * Default constructor.
53 */
54 private CategoryResourceLoader()
55 {
56 }
57
58 // ****************************** Inner Classes *****************************
59
60 // ********************************* Methods ********************************
61
62 // --- init -----------------------------------------------------------------
63
64 // --- get&set --------------------------------------------------------------
65
66 // --- business -------------------------------------------------------------
67
68 /**
69 * Returns the category resource for the given category type.
70 *
71 * @param categoryId the type of the category the resource is requested.
72 * @return a category resource, never <code>null</code>.
73 */
74 public CategoryResource getResource(final String categoryId)
75 {
76 return getResource(Locale.getDefault(), categoryId);
77 }
78
79 /**
80 * Returns the category resource for the given category type.
81 *
82 * @param locale the locale for which the resource is requested.
83 * @param categoryId the type of the category the resource is requested.
84 * @return a category resource, never <code>null</code>.
85 */
86 public CategoryResource getResource(final Locale locale,
87 final String categoryId)
88 {
89 try
90 {
91 final Class<?> categoryType = Class.forName(categoryId);
92 return getResource(locale, categoryType);
93 }
94 catch (final ClassNotFoundException e)
95 {
96 final int lastDotIndex = categoryId.lastIndexOf('.');
97 final String label =
98 lastDotIndex != -1 ? categoryId.substring(lastDotIndex + 1)
99 : categoryId;
100 return new CategoryResource(label, null);
101 }
102 }
103
104 /**
105 * Returns the category resource for the given category type.
106 *
107 * @param categoryType the type of the category the resource is requested.
108 * @return a category resource, never <code>null</code>.
109 */
110 public CategoryResource getResource(final Class<?> categoryType)
111 {
112 return getResource(Locale.getDefault(), categoryType);
113 }
114
115 /**
116 * Returns the category resource for the given category type.
117 *
118 * @param locale the locale for which the resource is requested.
119 * @param categoryType the type of the category the resource is requested.
120 * @return a category resource, never <code>null</code>.
121 */
122 public CategoryResource getResource(final Locale locale,
123 final Class<?> categoryType)
124 {
125 for (final CategoryResourceProvider resources : loader)
126 {
127 try
128 {
129 final CategoryResource resource =
130 resources.getResource(locale, categoryType);
131 if (resource != null)
132 {
133 return resource;
134 }
135 }
136 catch (final RuntimeException e)
137 {
138 continue;
139 }
140 }
141
142 return new CategoryResource(categoryType.getSimpleName(), null);
143 }
144
145 // --- object basics --------------------------------------------------------
146
147 }