Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
ClassMapper |
|
| 3.0;3 |
1 | package org.apache.turbine.services.template.mapper; | |
2 | ||
3 | ||
4 | /* | |
5 | * Licensed to the Apache Software Foundation (ASF) under one | |
6 | * or more contributor license agreements. See the NOTICE file | |
7 | * distributed with this work for additional information | |
8 | * regarding copyright ownership. The ASF licenses this file | |
9 | * to you under the Apache License, Version 2.0 (the | |
10 | * "License"); you may not use this file except in compliance | |
11 | * with the License. You may obtain a copy of the License at | |
12 | * | |
13 | * http://www.apache.org/licenses/LICENSE-2.0 | |
14 | * | |
15 | * Unless required by applicable law or agreed to in writing, | |
16 | * software distributed under the License is distributed on an | |
17 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
18 | * KIND, either express or implied. See the License for the | |
19 | * specific language governing permissions and limitations | |
20 | * under the License. | |
21 | */ | |
22 | ||
23 | ||
24 | import java.util.ArrayList; | |
25 | import java.util.Arrays; | |
26 | import java.util.List; | |
27 | ||
28 | import org.apache.commons.lang.StringUtils; | |
29 | import org.apache.commons.logging.Log; | |
30 | import org.apache.commons.logging.LogFactory; | |
31 | import org.apache.turbine.modules.Loader; | |
32 | import org.apache.turbine.services.template.TemplateService; | |
33 | ||
34 | /** | |
35 | * This mapper tries to map Template names to class names. If no direct match | |
36 | * is found, it tries matches "upwards" in the package hierarchy until either | |
37 | * a match is found or the root is hit. Then it returns the name of the | |
38 | * default class from the TemplateEngineService. | |
39 | * | |
40 | * 1. about.directions.Driving <- direct matching the template to the class name | |
41 | * 2. about.directions.Default <- matching the package, class name is Default | |
42 | * 3. about.Default <- stepping up in the package hierarchy, looking for Default | |
43 | * 4. Default <- Class called "Default" without package | |
44 | * 5. VelocityScreen <- The class configured by the Service (VelocityService) to | |
45 | * | |
46 | * Please note, that no actual packages are searched. This is the scope of the | |
47 | * TemplateEngine Loader which is passed at construction time. | |
48 | * | |
49 | * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a> | |
50 | * @version $Id: ClassMapper.java 1071091 2011-02-15 22:06:55Z tv $ | |
51 | */ | |
52 | ||
53 | public class ClassMapper | |
54 | extends BaseMapper | |
55 | implements Mapper | |
56 | { | |
57 | /** The loader for actually trying out the package names */ | |
58 | 282 | private Loader loader = null; |
59 | ||
60 | /** Logging */ | |
61 | 58 | private static Log log = LogFactory.getLog(ClassMapper.class); |
62 | ||
63 | /** | |
64 | * Default C'tor. If you use this C'tor, you must use | |
65 | * the bean setter to set the various properties needed for | |
66 | * this mapper before first usage. | |
67 | */ | |
68 | public ClassMapper() | |
69 | 282 | { |
70 | // empty | |
71 | 282 | } |
72 | ||
73 | /** | |
74 | * Get the Loader value. | |
75 | * @return the Loader value. | |
76 | */ | |
77 | public Loader getLoader() | |
78 | { | |
79 | 0 | return loader; |
80 | } | |
81 | ||
82 | /** | |
83 | * Set the Loader value. | |
84 | * @param loader The new Loader value. | |
85 | */ | |
86 | public void setLoader(Loader loader) | |
87 | { | |
88 | 282 | this.loader = loader; |
89 | 282 | log.debug("Loader is " + this.loader); |
90 | 282 | } |
91 | ||
92 | /** | |
93 | * Strip off a possible extension, replace all "," with "." | |
94 | * Look through the given package path until a match is found. | |
95 | * | |
96 | * @param template The template name. | |
97 | * @return A class name for the given template. | |
98 | */ | |
99 | public String doMapping(String template) | |
100 | { | |
101 | 58 | log.debug("doMapping(" + template + ")"); |
102 | ||
103 | // Copy our elements into an array | |
104 | 58 | List<String> components |
105 | = new ArrayList<String>(Arrays.asList(StringUtils.split( | |
106 | template, | |
107 | String.valueOf(TemplateService.TEMPLATE_PARTS_SEPARATOR)))); | |
108 | 58 | int componentSize = components.size() - 1 ; |
109 | ||
110 | // This method never gets an empty string passed. | |
111 | // So this is never < 0 | |
112 | 58 | String className = components.get(componentSize); |
113 | 58 | components.remove(componentSize--); |
114 | ||
115 | 58 | log.debug("className is " + className); |
116 | ||
117 | // Strip off a possible Extension | |
118 | 58 | int dotIndex = className.lastIndexOf(TemplateService.EXTENSION_SEPARATOR); |
119 | 58 | className = (dotIndex < 0) ? className : className.substring(0, dotIndex); |
120 | ||
121 | // This is an optimization. If the name we're looking for is | |
122 | // already the default name for the template, don't do a "first run" | |
123 | // which looks for an exact match. | |
124 | 58 | boolean firstRun = !className.equals(TemplateService.DEFAULT_NAME); |
125 | ||
126 | for(;;) | |
127 | { | |
128 | 146 | String pkg = StringUtils.join(components.iterator(), String.valueOf(separator)); |
129 | 146 | StringBuffer testName = new StringBuffer(); |
130 | ||
131 | 146 | log.debug("classPackage is now: " + pkg); |
132 | ||
133 | 146 | if (!components.isEmpty()) |
134 | { | |
135 | 90 | testName.append(pkg); |
136 | 90 | testName.append(separator); |
137 | } | |
138 | ||
139 | 146 | testName.append((firstRun) |
140 | ? className | |
141 | : TemplateService.DEFAULT_NAME); | |
142 | ||
143 | 146 | log.debug("Looking for " + testName); |
144 | try | |
145 | { | |
146 | 146 | loader.getAssembler(testName.toString()); |
147 | 24 | log.debug("Found it, returning " + testName); |
148 | 24 | return testName.toString(); |
149 | } | |
150 | 122 | catch (Exception e) |
151 | { | |
152 | // Not found. Go on. | |
153 | } | |
154 | ||
155 | 122 | if (firstRun) |
156 | { | |
157 | 46 | firstRun = false; |
158 | } | |
159 | else | |
160 | { | |
161 | 76 | if (components.isEmpty()) |
162 | { | |
163 | 34 | break; // for(;;) |
164 | } | |
165 | 42 | components.remove(componentSize--); |
166 | } | |
167 | 88 | } |
168 | ||
169 | 34 | log.debug("Returning default"); |
170 | 34 | return getDefaultName(template); |
171 | } | |
172 | } | |
173 | ||
174 | ||
175 | ||
176 |