Examples of org.springframework.web.portlet.ModelAndView

org.springframework.web.portlet.ModelAndView
Holder for both Model and View in the web MVC framework. Note that these are entirely distinct. This class merely holds both to make it possible for a controller to return both model and view in a single return value.
Represents a model and view returned by a handler, to be resolved by a DispatcherPortlet. The view can take the form of a String view name which will need to be resolved by a ViewResolver object; alternatively a view object can be specified directly. The model is a Map, allowing the use of multiple objects keyed by name. @author Juergen Hoeller @since 2.0 @see org.springframework.web.portlet.DispatcherPortlet @see org.springframework.web.servlet.ViewResolver @see org.springframework.web.portlet.HandlerAdapter @see org.springframework.web.portlet.mvc.Controller

    handleException = true;
    PortletSession session = renderRequest.getPortletSession();
    final FlowException flowException = new FlowException("Error") {
    };
    session.setAttribute("actionRequestFlowException", flowException);
    ModelAndView mv = controller.handleRender(renderRequest, renderResponse, flowHandler);
    assertEquals("error", mv.getViewName());
  }

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  private ModelAndView handleException(FlowException e, FlowHandler flowHandler, RenderRequest request,
      RenderResponse response) {
    String view = flowHandler.handleException(e, request, response);
    if (view != null) {
      return new ModelAndView(view);
    } else {
      return defaultHandleException(flowHandler, e, request, response);
    }
  }

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  private ModelAndView handleResourceException(FlowException e, FlowHandler flowHandler, ResourceRequest request,
      ResourceResponse response) {
    String view = flowHandler.handleResourceException(e, request, response);
    if (view != null) {
      return new ModelAndView(view);
    } else {
      return defaultHandleResourceException(flowHandler, e, request, response);
    }
  }

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    PortletHandlerMethodResolver methodResolver = getMethodResolver(handler);
    Method handlerMethod = methodResolver.resolveHandlerMethod(request);
    PortletHandlerMethodInvoker methodInvoker = new PortletHandlerMethodInvoker(methodResolver);


    Object result = methodInvoker.invokeHandlerMethod(handlerMethod, handler, webRequest, implicitModel);
    ModelAndView mav = methodInvoker.getModelAndView(handlerMethod, handler.getClass(), result, implicitModel,
        webRequest);
    methodInvoker.updateModelAttributes(
        handler, (mav != null ? mav.getModel() : null), implicitModel, webRequest);


    // Expose implicit model for subsequent render phase.
    if (response instanceof StateAwareResponse && !implicitModel.isEmpty()) {
      StateAwareResponse stateResponse = (StateAwareResponse) response;
      Map<?, ?> modelToStore = implicitModel;

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        for (ModelAndViewResolver mavResolver : customModelAndViewResolvers) {
          org.springframework.web.servlet.ModelAndView smav =
              mavResolver.resolveModelAndView(handlerMethod, handlerType, returnValue, implicitModel, webRequest);
          if (smav != ModelAndViewResolver.UNRESOLVED) {
            return (smav.isReference() ?
                new ModelAndView(smav.getViewName(), smav.getModelMap()) :
                new ModelAndView(smav.getView(), smav.getModelMap()));
          }
        }
      }


      if (returnValue instanceof ModelAndView) {
        ModelAndView mav = (ModelAndView) returnValue;
        mav.getModelMap().mergeAttributes(implicitModel);
        return mav;
      }
      else if (returnValue instanceof org.springframework.web.servlet.ModelAndView) {
        org.springframework.web.servlet.ModelAndView smav = (org.springframework.web.servlet.ModelAndView) returnValue;
        ModelAndView mav = (smav.isReference() ?
            new ModelAndView(smav.getViewName(), smav.getModelMap()) :
            new ModelAndView(smav.getView(), smav.getModelMap()));
        mav.getModelMap().mergeAttributes(implicitModel);
        return mav;
      }
      else if (returnValue instanceof Model) {
        return new ModelAndView().addAllObjects(implicitModel).addAllObjects(((Model) returnValue).asMap());
      }
      else if (returnValue instanceof View) {
        return new ModelAndView(returnValue).addAllObjects(implicitModel);
      }
      else if (handlerMethod.isAnnotationPresent(ModelAttribute.class)) {
        addReturnValueAsModelAttribute(handlerMethod, handlerType, returnValue, implicitModel);
        return new ModelAndView().addAllObjects(implicitModel);
      }
      else if (returnValue instanceof Map) {
        return new ModelAndView().addAllObjects(implicitModel).addAllObjects((Map<String, Object>) returnValue);
      }
      else if (returnValue instanceof String) {
        return new ModelAndView((String) returnValue).addAllObjects(implicitModel);
      }
      else if (returnValue == null) {
        // Either returned null or was 'void' return.
        return null;
      }
      else if (!BeanUtils.isSimpleProperty(returnValue.getClass())) {
        // Assume a single model attribute...
        addReturnValueAsModelAttribute(handlerMethod, handlerType, returnValue, implicitModel);
        return new ModelAndView().addAllObjects(implicitModel);
      }
      else {
        throw new IllegalArgumentException("Invalid handler method return value: " + returnValue);
      }
    }

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  private ModelAndView getModelAndView(Object returnValue) {
    if (returnValue instanceof ModelAndView) {
      return (ModelAndView) returnValue;
    }
    else if (returnValue instanceof Model) {
      return new ModelAndView().addAllObjects(((Model) returnValue).asMap());
    }
    else if (returnValue instanceof Map) {
      return new ModelAndView().addAllObjects((Map<String, Object>) returnValue);
    }
    else if (returnValue instanceof View) {
      return new ModelAndView(returnValue);
    }
    else if (returnValue instanceof String) {
      return new ModelAndView((String) returnValue);
    }
    else if (returnValue == null) {
      return new ModelAndView();
    }
    else {
      throw new IllegalArgumentException("Invalid handler method return value: " + returnValue);
    }
  }

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   */
  @Override
  protected ModelAndView handleRenderRequestInternal(RenderRequest request, RenderResponse response)
      throws Exception {


    return new ModelAndView(getViewName());
  }

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    Properties props = new Properties();
    props.setProperty("java.lang.Exception", "error");
    props.setProperty("AnotherException", "another-error");
    exceptionResolver.setMappedHandlers(Collections.singleton(handler1));
    exceptionResolver.setExceptionMappings(props);
    ModelAndView mav = exceptionResolver.resolveException(request, response, handler1, genericException);
    assertEquals("error", mav.getViewName());
  }

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    Properties props = new Properties();
    props.setProperty("Exception", "error");
    props.setProperty("AnotherException", "another-error");
    exceptionResolver.setMappedHandlers(Collections.singleton(handler1));
    exceptionResolver.setExceptionMappings(props);
    ModelAndView mav = exceptionResolver.resolveException(request, response, handler1, genericException);
    assertEquals("error", mav.getViewName());
  }

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    Properties props = new Properties();
    props.setProperty("Exception", "error");
    props.setProperty("SomeOddException", "another-error");
    exceptionResolver.setMappedHandlers(Collections.singleton(handler1));
    exceptionResolver.setExceptionMappings(props);
    ModelAndView mav = exceptionResolver.resolveException(request, response, handler1, oddException);
    assertEquals("another-error", mav.getViewName());
  }

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