Examples of org.springframework.web.servlet.support.RequestContext

Package org.springframework.web.servlet.support

Examples of org.springframework.web.servlet.support.RequestContext

org.springframework.web.servlet.support.RequestContext
Context holder for request-specific state, like current web application context, current locale, current theme, and potential binding errors. Provides easy access to localized messages and Errors instances.
Suitable for exposition to views, and usage within JSP's "useBean" tag, JSP scriptlets, JSTL EL, Velocity templates, etc. Necessary for views that do not have access to the servlet request, like Velocity templates.
Can be instantiated manually, or automatically exposed to views as model attribute via AbstractView's "requestContextAttribute" property.
Will also work outside of DispatcherServlet requests, accessing the root WebApplicationContext and using an appropriate fallback for the locale (the HttpServletRequest's primary locale). @author Juergen Hoeller @since 03.03.2003 @see org.springframework.web.servlet.DispatcherServlet @see org.springframework.web.servlet.view.AbstractView#setRequestContextAttribute @see org.springframework.web.servlet.view.UrlBasedViewResolver#setRequestContextAttribute @see #getFallbackLocale()


    public int doStartTag() throws JspException {


        try {
            this.requestContext =
                    new RequestContext((HttpServletRequest) this.pageContext.getRequest());
        } catch (RuntimeException ex) {
            throw ex;
        } catch (Exception ex) {
            pageContext.getServletContext().log("Exception in custom tag", ex);
        }

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    }


    public Errors getValidationErrors(HttpServletRequest request, HttpServletResponse response, Object handler, Map model) {
        String commandName = this.resolveCommandName(handler);
        if (commandName != null) {
            RequestContext requestContext = new RequestContext(request, model);
            return requestContext.getErrors(commandName);
        } else {
            logger.warn("No command name found for handler : " + handler);
            return null;
        }
    }

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     * Use the application context itself for default message resolution.
     */
    private MessageSource getMessageSource() {
        try {
            this.requestContext =
                new RequestContext((HttpServletRequest) this.pageContext.getRequest());
        }
        catch (RuntimeException ex) {
            throw ex;
        }
        catch (Exception ex) {

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        final IContext context = processingContext.getContext();
        if (!canApply || !(context instanceof IWebContext)) {
            return action;
        }


        final RequestContext requestContext =
                (RequestContext) context.getVariables().get(SpringContextVariableNames.SPRING_REQUEST_CONTEXT);
        if (requestContext == null) {
            return action;
        }

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        final IContext context = processingContext.getContext();
        if (!canApply || !(context instanceof IWebContext)) {
            return value;
        }


        final RequestContext requestContext =
                (RequestContext) context.getVariables().get(SpringContextVariableNames.SPRING_REQUEST_CONTEXT);
        if (requestContext == null) {
            return value;
        }

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        final IContext context = processingContext.getContext();
        if (!canApply || !(context instanceof IWebContext)) {
            return null;
        }


        final RequestContext requestContext =
                (RequestContext) context.getVariables().get(SpringContextVariableNames.SPRING_REQUEST_CONTEXT);
        if (requestContext == null) {
            return null;
        }

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        final IContext context = processingContext.getContext();
        if (!canApply || !(context instanceof IWebContext)) {
            return url;
        }


        final RequestContext requestContext =
                (RequestContext) context.getVariables().get(SpringContextVariableNames.SPRING_REQUEST_CONTEXT);
        if (requestContext == null) {
            return url;
        }

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        final Errors errors = bindStatus.getErrors();
        if (errors == null) {
            return Collections.EMPTY_LIST;
        }


        final RequestContext requestContext =
                (RequestContext) processingContext.getContext().getVariables().get(SpringContextVariableNames.SPRING_REQUEST_CONTEXT);
        if (requestContext == null) {
            return Collections.EMPTY_LIST;
        }


        final List<DetailedError> errorObjects = new ArrayList<DetailedError>(errors.getErrorCount() + 2);




        if (includeGlobalErrors) {
            final List<ObjectError> globalErrors = errors.getGlobalErrors();
            for (final ObjectError globalError : globalErrors) {
                final String message = requestContext.getMessage(globalError, false);
                final DetailedError errorObject =
                        new DetailedError(globalError.getCode(), globalError.getArguments(), message);
                errorObjects.add(errorObject);
            }
        }


        if (includeFieldErrors) {
            final List<FieldError> fieldErrors = errors.getFieldErrors();
            for (final FieldError fieldError : fieldErrors) {
                final String message = requestContext.getMessage(fieldError, false);
                final DetailedError errorObject =
                        new DetailedError(fieldError.getField(), fieldError.getCode(), fieldError.getArguments(), message);
                errorObjects.add(errorObject);
            }
        }

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         * this method performs no preprocessing on the expression!
         */


        // This method will return null if no binding is found and optional == true


        final RequestContext requestContext =
                (RequestContext) processingContext.getContext().getVariables().get(SpringContextVariableNames.SPRING_REQUEST_CONTEXT);
        if (requestContext == null) {
            return null;
        }

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            mergedModel.putAll(model);
        }


        final ApplicationContext applicationContext = getApplicationContext();


        final RequestContext requestContext = 
                new RequestContext(request, response, getServletContext(), mergedModel);
        
        // For compatibility with ThymeleafView
        addRequestContextAsVariable(mergedModel, SpringContextVariableNames.SPRING_REQUEST_CONTEXT, requestContext);
        // For compatibility with AbstractTemplateView
        addRequestContextAsVariable(mergedModel, AbstractTemplateView.SPRING_MACRO_REQUEST_CONTEXT_ATTRIBUTE, requestContext);

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