Examples of org.springframework.web.servlet.view.ContentNegotiatingViewResolver

Package org.springframework.web.servlet.view

Examples of org.springframework.web.servlet.view.ContentNegotiatingViewResolver

org.springframework.web.servlet.view.ContentNegotiatingViewResolver
Implementation of {@link ViewResolver} that resolves a view based on the request file name or {@code Accept} header.
The {@code ContentNegotiatingViewResolver} does not resolve views itself, but delegates to other {@link ViewResolver}s. By default, these other view resolvers are picked up automatically from the application context, though they can also be set explicitly by using the {@link #setViewResolvers(List) viewResolvers} property.Note that in order for this view resolver to work properly, the {@link #setOrder(int) order}property needs to be set to a higher precedence than the others (the default is {@link Ordered#HIGHEST_PRECEDENCE}.)
This view resolver uses the requested {@linkplain MediaType media type} to select a suitable {@link View} for arequest. This media type is determined by using the following criteria:
1. If the requested path has a file extension and if the {@link #setFavorPathExtension} property is{@code true}, the {@link #setMediaTypes(Map) mediaTypes} property is inspected for a matching media type.
2. If the request contains a parameter defining the extension and if the {@link #setFavorParameter}property is true, the {@link #setMediaTypes(Map) mediaTypes} property is inspected for a matchingmedia type. The default name of the parameter is format and it can be configured using the {@link #setParameterName(String) parameterName} property.
3. If there is no match in the {@link #setMediaTypes(Map) mediaTypes} property and if the Java ActivationFramework (JAF) is both {@linkplain #setUseJaf enabled} and present on the classpath,{@link FileTypeMap#getContentType(String)} is used instead.
4. If the previous steps did not result in a media type, and {@link #setIgnoreAcceptHeader ignoreAcceptHeader} is {@code false}, the request {@code Accept} header isused.
Once the requested media type has been determined, this resolver queries each delegate view resolver for a {@link View} and determines if the requested media type is {@linkplain MediaType#includes(MediaType) compatible}with the view's {@linkplain View#getContentType() content type}). The most compatible view is returned.
Additionally, this view resolver exposes the {@link #setDefaultViews(List) defaultViews} property, allowing you tooverride the views provided by the view resolvers. Note that these default views are offered as candicates, and still need have the content type requested (via file extension, parameter, or {@code Accept} header, described above).You can also set the {@linkplain #setDefaultContentType(MediaType) default content type} directly, which will bereturned when the other mechanisms ( {@code Accept} header, file extension or parameter) do not result in a match.
For example, if the request path is {@code /view.html}, this view resolver will look for a view that has the {@code text/html} content type (based on the {@code html} file extension). A request for {@code /view} with a {@code text/html} request {@code Accept} header has the same result. @author Arjen Poutsma @author Juergen Hoeller @since 3.0 @see ViewResolver @see InternalResourceViewResolver @see BeanNameViewResolver


    List<View> viewList = new ArrayList<View>();
    viewList.add(new MappingJacksonJsonView());
    viewList.add(new MarshallingView(marshaller));


    ContentNegotiatingViewResolver cnViewResolver = new ContentNegotiatingViewResolver();
    cnViewResolver.setDefaultViews(viewList);
    cnViewResolver.setDefaultContentType(MediaType.TEXT_HTML);


    MockMvc mockMvc =
      standaloneSetup(new PersonController())
        .setViewResolvers(cnViewResolver, new InternalResourceViewResolver())
        .build();

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    viewResolver.setSuffix(".jsp");


    MappingJackson2JsonView defaultView = new MappingJackson2JsonView();
    defaultView.setExtractValueFromSingleKeyModel(true);


    ContentNegotiatingViewResolver contentViewResolver = new ContentNegotiatingViewResolver();
    contentViewResolver.setContentNegotiationManager(contentNegotiationManager.getObject());
    contentViewResolver.setViewResolvers(Arrays.<ViewResolver> asList(viewResolver));
    contentViewResolver.setDefaultViews(Arrays.<View> asList(defaultView));
    return contentViewResolver;
  }

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    return new PropertySourcesPlaceholderConfigurer();
  }


  @Bean
  public ContentNegotiatingViewResolver contentViewResolver() throws Exception {
    ContentNegotiatingViewResolver contentViewResolver = new ContentNegotiatingViewResolver();
    ContentNegotiationManagerFactoryBean contentNegotiationManager = new ContentNegotiationManagerFactoryBean();
    contentNegotiationManager.addMediaType("json", MediaType.APPLICATION_JSON);
    contentViewResolver.setContentNegotiationManager(contentNegotiationManager.getObject());
    contentViewResolver.setDefaultViews(Arrays.<View> asList(new MappingJacksonJsonView()));
    return contentViewResolver;
  }

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          this.contentNegotiatingResolver.setDefaultViews(views);
        }
      }
    }
    else {
      this.contentNegotiatingResolver = new ContentNegotiatingViewResolver();
      this.contentNegotiatingResolver.setDefaultViews(Arrays.asList(defaultViews));
      this.contentNegotiatingResolver.setViewResolvers(this.viewResolvers);
      this.contentNegotiatingResolver.setContentNegotiationManager(this.contentNegotiationManager);
    }
  }

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    assertEquals(1, compositeResolver.getViewResolvers().size());
    assertEquals(Ordered.HIGHEST_PRECEDENCE, compositeResolver.getOrder());


    List<ViewResolver> resolvers = compositeResolver.getViewResolvers();
    assertEquals(ContentNegotiatingViewResolver.class, resolvers.get(0).getClass());
    ContentNegotiatingViewResolver cnvr = (ContentNegotiatingViewResolver) resolvers.get(0);
    assertEquals(6, cnvr.getViewResolvers().size());
    assertEquals(1, cnvr.getDefaultViews().size());
    assertTrue(cnvr.isUseNotAcceptableStatusCode());


    String beanName = "contentNegotiationManager";
    DirectFieldAccessor accessor = new DirectFieldAccessor(cnvr);
    ContentNegotiationManager manager = (ContentNegotiationManager) accessor.getPropertyValue(beanName);
    assertNotNull(manager);

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  @Test
  public void contentNegotiation() {
    MappingJackson2JsonView view = new MappingJackson2JsonView();
    this.registry.enableContentNegotiation(view);
    ContentNegotiatingViewResolver resolver = checkAndGetResolver(ContentNegotiatingViewResolver.class);
    assertEquals(Arrays.asList(view), resolver.getDefaultViews());
    assertEquals(Ordered.HIGHEST_PRECEDENCE, this.registry.getOrder());
  }

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  @Test
  public void contentNegotiationAddsDefaultViewRegistrations() {
    MappingJackson2JsonView view1 = new MappingJackson2JsonView();
    this.registry.enableContentNegotiation(view1);


    ContentNegotiatingViewResolver resolver1 = checkAndGetResolver(ContentNegotiatingViewResolver.class);
    assertEquals(Arrays.asList(view1), resolver1.getDefaultViews());


    MarshallingView view2 = new MarshallingView();
    this.registry.enableContentNegotiation(view2);


    ContentNegotiatingViewResolver resolver2 = checkAndGetResolver(ContentNegotiatingViewResolver.class);
    assertEquals(Arrays.asList(view1, view2), resolver2.getDefaultViews());
    assertSame(resolver1, resolver2);
  }

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    viewList.add(new MarshallingView(marshaller));


    ContentNegotiationManager manager = new ContentNegotiationManager(
        new HeaderContentNegotiationStrategy(), new FixedContentNegotiationStrategy(MediaType.TEXT_HTML));


    ContentNegotiatingViewResolver cnViewResolver = new ContentNegotiatingViewResolver();
    cnViewResolver.setDefaultViews(viewList);
    cnViewResolver.setContentNegotiationManager(manager);
    cnViewResolver.afterPropertiesSet();


    MockMvc mockMvc =
      standaloneSetup(new PersonController())
        .setViewResolvers(cnViewResolver, new InternalResourceViewResolver())
        .build();

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    private Environment env;


    @Bean
    public ViewResolver ContentNegotiatingViewResolver() {
        log.debug("Configuring the ContentNegotiatingViewResolver");
        ContentNegotiatingViewResolver viewResolver = new ContentNegotiatingViewResolver();
        List<ViewResolver> viewResolvers = new ArrayList<ViewResolver>();


        UrlBasedViewResolver urlBasedViewResolver = new UrlBasedViewResolver();
        urlBasedViewResolver.setViewClass(JstlView.class);
        urlBasedViewResolver.setPrefix("/WEB-INF/pages/");
        urlBasedViewResolver.setSuffix(".jsp");
        viewResolvers.add(urlBasedViewResolver);


        viewResolver.setViewResolvers(viewResolvers);


        List<View> defaultViews = new ArrayList<View>();
        defaultViews.add(new MappingJackson2JsonView());
        defaultViews.add(syndicView());
        viewResolver.setDefaultViews(defaultViews);


        return viewResolver;
    }

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    @Bean
    @ConditionalOnBean(ViewResolver.class)
    @ConditionalOnMissingBean(name = "viewResolver")
    public ContentNegotiatingViewResolver viewResolver(BeanFactory beanFactory) {
      ContentNegotiatingViewResolver resolver = new ContentNegotiatingViewResolver();
      resolver.setContentNegotiationManager(beanFactory
          .getBean(ContentNegotiationManager.class));
      // ContentNegotiatingViewResolver uses all the other view resolvers to locate
      // a view so it should have a high precedence
      resolver.setOrder(Ordered.HIGHEST_PRECEDENCE);
      return resolver;
    }

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