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 org.apache.commons.lang3.StringUtils;
25 import org.apache.turbine.services.TurbineServices;
26 import org.apache.turbine.services.template.TemplateEngineService;
27 import org.apache.turbine.services.template.TemplateService;
28
29 /**
30 * This is a pretty simple mapper which returns template pathes for
31 * a supplied template name. This path can be used by the TemplateEngine
32 * to access a certain resource to actually render the template.
33 *
34 * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
35 * @version $Id$
36 */
37
38 public class ScreenTemplateMapper
39 extends BaseTemplateMapper
40 implements Mapper
41 {
42 /**
43 * Default C'tor. If you use this C'tor, you must use
44 * the bean setter to set the various properties needed for
45 * this mapper before first usage.
46 */
47 public ScreenTemplateMapper()
48 {
49 super();
50 }
51
52 /**
53 * Check, whether the provided name exists. Returns null
54 * if the screen does not exist.
55 *
56 * @param template The template name.
57 * @return The matching screen name.
58 */
59 @Override
60 public String doMapping(String template)
61 {
62 String [] components = StringUtils.split(template, String.valueOf(TemplateService.TEMPLATE_PARTS_SEPARATOR));
63
64 // Last element decides, which template Service to use...
65 TemplateService templateService = (TemplateService)TurbineServices.getInstance().getService(TemplateService.SERVICE_NAME);
66 TemplateEngineService tes = templateService.getTemplateEngineService(components[components.length - 1]);
67
68 String templatePackage = StringUtils.join(components, String.valueOf(separator));
69
70 // But the Templating service must look for the name with prefix
71 StringBuilder testPath = new StringBuilder();
72 if (StringUtils.isNotEmpty(prefix))
73 {
74 testPath.append(prefix);
75 testPath.append(separator);
76 }
77 testPath.append(templatePackage);
78
79 return (tes != null && tes.templateExists(testPath.toString()))
80 ? templatePackage
81 : null;
82 }
83 }
84
85
86
87