1 /**
2 * This file Copyright (c) 2010 Magnolia International
3 * Ltd. (http://www.magnolia-cms.com). All rights reserved.
4 *
5 *
6 * This file is dual-licensed under both the Magnolia
7 * Network Agreement and the GNU General Public License.
8 * You may elect to use one or the other of these licenses.
9 *
10 * This file is distributed in the hope that it will be
11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14 * Redistribution, except as permitted by whichever of the GPL
15 * or MNA you select, is prohibited.
16 *
17 * 1. For the GPL license (GPL), you can redistribute and/or
18 * modify this file under the terms of the GNU General
19 * Public License, Version 3, as published by the Free Software
20 * Foundation. You should have received a copy of the GNU
21 * General Public License, Version 3 along with this program;
22 * if not, write to the Free Software Foundation, Inc., 51
23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 *
25 * 2. For the Magnolia Network Agreement (MNA), this file
26 * and the accompanying materials are made available under the
27 * terms of the MNA which accompanies this distribution, and
28 * is available at http://www.magnolia-cms.com/mna.html
29 *
30 * Any modifications to this file must keep this entire header
31 * intact.
32 *
33 */
34 package info.magnolia.module.blossom.urimapping;
35
36 import info.magnolia.cms.beans.config.VirtualURIMapping;
37 import info.magnolia.context.MgnlContext;
38 import info.magnolia.module.blossom.support.MethodInvocationUtils;
39 import info.magnolia.module.blossom.support.ParameterResolver;
40
41 import javax.servlet.http.HttpServletRequest;
42 import java.lang.reflect.Method;
43
44 /**
45 * VirtualURIMapping that delegates to a method using reflection. The method must return either a String or a
46 * MappingResult and can accept as arguments the incoming uri as a String and/or a HttpServletRequest.
47 */
48 public class VirtualURIMappingAdapter implements VirtualURIMapping {
49
50 private Object targetObject;
51 private Method targetMethod;
52
53 public VirtualURIMappingAdapter(Object targetObject, Method targetMethod) {
54 this.targetObject = targetObject;
55 this.targetMethod = targetMethod;
56 }
57
58 public MappingResult mapURI(String uri) {
59
60 Object result = MethodInvocationUtils.invoke(targetMethod, targetObject, getVirtualURIMappingParameters(uri));
61
62 if (result == null)
63 return null;
64
65 if (result instanceof VirtualURIMapping.MappingResult)
66 return (VirtualURIMapping.MappingResult) result;
67
68 if (result instanceof String) {
69 String resultString = (String) result;
70 VirtualURIMapping.MappingResult mappingResult = new VirtualURIMapping.MappingResult();
71 mappingResult.setLevel(resultString.length());
72 mappingResult.setToURI(resultString);
73 return mappingResult;
74 }
75
76 throw new IllegalArgumentException("VirtualURIMapping must return either String or MappingResult");
77 }
78
79 private ParameterResolver getVirtualURIMappingParameters(final String uri) {
80 return new ParameterResolver() {
81 public Object resolveParameter(Class<?> parameterType) {
82 if (parameterType.equals(String.class))
83 return uri;
84 if (parameterType.equals(HttpServletRequest.class))
85 return MgnlContext.getWebContext().getRequest();
86 return super.resolveParameter(parameterType);
87 }
88 };
89 }
90 }