01: /* ***** BEGIN LICENSE BLOCK *****
02: * Version: MPL 1.1
03: * The contents of this file are subject to the Mozilla Public License Version
04: * 1.1 (the "License"); you may not use this file except in compliance with
05: * the License. You may obtain a copy of the License at
06: * http://www.mozilla.org/MPL/
07: *
08: * Software distributed under the License is distributed on an "AS IS" basis,
09: * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
10: * for the specific language governing rights and limitations under the
11: * License.
12: *
13: * The Original Code is Riot.
14: *
15: * The Initial Developer of the Original Code is
16: * Neteye GmbH.
17: * Portions created by the Initial Developer are Copyright (C) 2007
18: * the Initial Developer. All Rights Reserved.
19: *
20: * Contributor(s):
21: * Felix Gnass [fgnass at neteye dot de]
22: *
23: * ***** END LICENSE BLOCK ***** */
24: package org.riotfamily.common.web.mapping;
25:
26: import java.util.ArrayList;
27: import java.util.Collections;
28: import java.util.Iterator;
29: import java.util.List;
30:
31: import javax.servlet.http.HttpServletRequest;
32:
33: import org.springframework.context.ApplicationContext;
34: import org.springframework.context.ApplicationContextAware;
35: import org.springframework.core.OrderComparator;
36: import org.springframework.util.Assert;
37:
38: /**
39: * Class that performs URL lookups for handlers mapped by a
40: * {@link ReverseHandlerMapping}.
41: *
42: * @author Felix Gnass [fgnass at neteye dot de]
43: * @since 6.5
44: */
45: public class HandlerUrlResolver implements ApplicationContextAware {
46:
47: private List mappings;
48:
49: public void setApplicationContext(
50: ApplicationContext applicationContext) {
51: mappings = new ArrayList(applicationContext.getBeansOfType(
52: ReverseHandlerMapping.class).values());
53:
54: if (!mappings.isEmpty()) {
55: Collections.sort(mappings, new OrderComparator());
56: }
57: }
58:
59: /**
60: * Returns the URL of a mapped handler.
61: * @param handlerName The name of the handler
62: * @param prefix Optional prefix to sort out ambiguities
63: * @param attributes Optional attributes to fill out wildcards. Can either
64: * be <code>null</code>, a primitive wrapper, a Map or a bean.
65: * @param request The current request
66: */
67: public String getUrlForHandler(HttpServletRequest request,
68: String handlerName, Object attributes, String prefix) {
69:
70: Assert.notNull(mappings,
71: "The ApplicationContext must be set first");
72: String url = null;
73: Iterator it = mappings.iterator();
74: while (url == null && it.hasNext()) {
75: ReverseHandlerMapping mapping = (ReverseHandlerMapping) it
76: .next();
77: url = mapping.getUrlForHandler(handlerName, prefix,
78: attributes, request);
79: }
80: return url;
81: }
82: }
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