1 /**
2 * Copyright (C) 2005-2009 Alfresco Software Limited.
3 *
4 * This file is part of the Spring Surf Extension project.
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * 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, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 package org.springframework.extensions.webscripts;
20
21 import java.util.List;
22
23 import freemarker.template.TemplateMethodModelEx;
24 import freemarker.template.TemplateModelException;
25 import freemarker.template.TemplateScalarModel;
26
27 /**
28 * @author David Caruana
29 *
30 * Custom FreeMarker Template language method.
31 * <p>
32 * Render absolute url for the specified url (only if the url isn't already absolute).
33 * <p>
34 * Usage: absurl(String url)
35 */
36 public final class AbsoluteUrlMethod implements TemplateMethodModelEx
37 {
38 private String basePath;
39
40 /**
41 * Construct
42 *
43 * @param basePath base path used to construct absolute url
44 */
45 public AbsoluteUrlMethod(String basePath)
46 {
47 this.basePath = basePath;
48 }
49
50
51 /**
52 * @see freemarker.template.TemplateMethodModel#exec(java.util.List)
53 */
54 public Object exec(List args) throws TemplateModelException
55 {
56 String result = "";
57
58 if (args.size() == 1)
59 {
60 Object arg0 = args.get(0);
61 if (arg0 instanceof TemplateScalarModel)
62 {
63 result = ((TemplateScalarModel)arg0).getAsString();
64 if (result.startsWith("/"))
65 {
66 result = basePath + result;
67 }
68 }
69 }
70
71 return result;
72 }
73 }