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1
24 package org.riotfamily.common.web.view;
25
26 import java.util.ArrayList  ;
27 import java.util.Collections ;
28 import java.util.Iterator ;
29 import java.util.Locale ;
30 import java.util.Map ;
31
32 import javax.servlet.http.HttpServletRequest ;
33
34 import org.springframework.beans.factory.BeanFactoryUtils;
35 import org.springframework.beans.factory.ListableBeanFactory;
36 import org.springframework.beans.factory.NoSuchBeanDefinitionException;
37 import org.springframework.core.OrderComparator;
38 import org.springframework.web.servlet.DispatcherServlet;
39 import org.springframework.web.servlet.ModelAndView;
40 import org.springframework.web.servlet.RequestToViewNameTranslator;
41 import org.springframework.web.servlet.View;
42 import org.springframework.web.servlet.ViewResolver;
43 import org.springframework.web.servlet.support.RequestContextUtils;
44 import org.springframework.web.servlet.view.DefaultRequestToViewNameTranslator;
45
46
49 public class ViewResolverHelper {
50
51 private ArrayList viewResolvers;
52
53 private RequestToViewNameTranslator viewNameTranslator;
54
55 public ViewResolverHelper(ListableBeanFactory beanFactory) {
56 Map matchingBeans = BeanFactoryUtils.beansOfTypeIncludingAncestors(
57 beanFactory, ViewResolver.class, true, false);
58
59 if (!matchingBeans.isEmpty()) {
60 this.viewResolvers = new ArrayList (matchingBeans.values());
61 Collections.sort(this.viewResolvers, new OrderComparator());
62 }
63
64 try {
65 this.viewNameTranslator = (RequestToViewNameTranslator) beanFactory.getBean(
66 DispatcherServlet.REQUEST_TO_VIEW_NAME_TRANSLATOR_BEAN_NAME,
67 RequestToViewNameTranslator.class);
68 }
69 catch (NoSuchBeanDefinitionException ex) {
70 this.viewNameTranslator = new DefaultRequestToViewNameTranslator();
71 }
72 }
73
74 public View resolveView(HttpServletRequest request, ModelAndView mv)
75 throws ViewResolutionException {
76
77 if (mv.hasView() && !mv.isReference()) {
78 return mv.getView();
79 }
80 return resolveView(request, mv.getViewName());
81 }
82
83 public View resolveView(HttpServletRequest request, String viewName)
84 throws ViewResolutionException {
85
86 try {
87 if (viewName == null) {
88 viewName = viewNameTranslator.getViewName(request);
89 }
90 Iterator i = viewResolvers.iterator();
91 while (i.hasNext()) {
92 ViewResolver viewResolver = (ViewResolver) i.next();
93 Locale locale = RequestContextUtils.getLocale(request);
94 View view = viewResolver.resolveViewName(viewName, locale);
95 if (view != null) {
96 return view;
97 }
98 }
99 }
100 catch (Exception e) {
101 throw new ViewResolutionException(viewName, e);
102 }
103 throw new ViewResolutionException(viewName);
104 }
105
106 }
107 |
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