Examples of org.springframework.web.servlet.ThemeResolver

org.springframework.web.servlet.ThemeResolver
Interface for web-based theme resolution strategies that allows for both theme resolution via the request and theme modification via request and response.
This interface allows for implementations based on session, cookies, etc. The default implementation is FixedThemeResolver, simply using a configured default theme.
Note that this resolver is only responsible for determining the current theme name. The Theme instance for the resolved theme name gets looked up by DispatcherServlet via the respective ThemeSource, i.e. the current WebApplicationContext.
Use RequestContext.getTheme() to retrieve the current theme in controllers or views, independent of the actual resolution strategy. @author Jean-Pierre Pawlak @author Juergen Hoeller @since 17.06.2003 @see org.springframework.web.servlet.theme.FixedThemeResolver @see org.springframework.ui.context.Theme @see org.springframework.ui.context.ThemeSource @see org.springframework.web.servlet.support.RequestContext#getTheme




  public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
      throws ServletException {


    ThemeResolver themeResolver = RequestContextUtils.getThemeResolver(request);
    if (themeResolver == null) {
      throw new IllegalStateException("No ThemeResolver found: not in a DispatcherServlet request?");
    }
    String newTheme = request.getParameter(this.paramName);
    if (newTheme != null) {
      themeResolver.setThemeName(request, response, newTheme);
    }
    // Proceed in any case.
    return true;
  }

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   * @param request current HTTP request
   * @return the current theme, or <code>null</code> if not found
   * @see #getThemeResolver
   */
  public static Theme getTheme(HttpServletRequest request) {
    ThemeResolver themeResolver = getThemeResolver(request);
    ThemeSource themeSource = getThemeSource(request);
    if (themeResolver != null && themeSource != null) {
      String themeName = themeResolver.resolveThemeName(request);
      return themeSource.getTheme(themeName);
    }
    else {
      return null;
    }

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   * @param request current HTTP request
   * @return the current theme, or <code>null</code> if not found
   * @see #getThemeResolver
   */
  public static Theme getTheme(HttpServletRequest request) {
    ThemeResolver themeResolver = getThemeResolver(request);
    ThemeSource themeSource = getThemeSource(request);
    if (themeResolver != null && themeSource != null) {
      String themeName = themeResolver.resolveThemeName(request);
      return themeSource.getTheme(themeName);
    }
    else {
      return null;
    }

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   * @param request current HTTP request
   * @return the current theme, or <code>null</code> if not found
   * @see #getThemeResolver
   */
  public static Theme getTheme(HttpServletRequest request) {
    ThemeResolver themeResolver = getThemeResolver(request);
    ThemeSource themeSource = getThemeSource(request);
    if (themeResolver != null && themeSource != null) {
      String themeName = themeResolver.resolveThemeName(request);
      return themeSource.getTheme(themeName);
    }
    else {
      return null;
    }

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  public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
      throws ServletException {


    ThemeResolver themeResolver = RequestContextUtils.getThemeResolver(request);
    if (themeResolver == null) {
      throw new IllegalStateException("No ThemeResolver found: not in a DispatcherServlet request?");
    }
    String newTheme = request.getParameter(this.paramName);
    if (newTheme != null) {
      themeResolver.setThemeName(request, response, newTheme);
    }
    // Proceed in any case.
    return true;
  }

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   * @param request current HTTP request
   * @return the current theme, or <code>null</code> if not found
   * @see #getThemeResolver
   */
  public static Theme getTheme(HttpServletRequest request) {
    ThemeResolver themeResolver = getThemeResolver(request);
    ThemeSource themeSource = getThemeSource(request);
    if (themeResolver != null && themeSource != null) {
      String themeName = themeResolver.resolveThemeName(request);
      return themeSource.getTheme(themeName);
    }
    else {
      return null;
    }

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    MockHttpServletResponse response = new MockHttpServletResponse();
    if (inDispatcherServlet()) {
      request.setAttribute(DispatcherServlet.WEB_APPLICATION_CONTEXT_ATTRIBUTE, wac);
      LocaleResolver lr = new AcceptHeaderLocaleResolver();
      request.setAttribute(DispatcherServlet.LOCALE_RESOLVER_ATTRIBUTE, lr);
      ThemeResolver tr = new FixedThemeResolver();
      request.setAttribute(DispatcherServlet.THEME_RESOLVER_ATTRIBUTE, tr);
      request.setAttribute(DispatcherServlet.THEME_SOURCE_ATTRIBUTE, wac);
    }
    else {
      sc.setAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, wac);

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   * @param request current HTTP request
   * @return the current theme, or <code>null</code> if not found
   * @see #getThemeResolver
   */
  public static Theme getTheme(HttpServletRequest request) {
    ThemeResolver themeResolver = getThemeResolver(request);
    ThemeSource themeSource = getThemeSource(request);
    if (themeResolver != null && themeSource != null) {
      String themeName = themeResolver.resolveThemeName(request);
      return themeSource.getTheme(themeName);
    }
    else {
      return null;
    }

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  public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
      throws ServletException {


    String newTheme = request.getParameter(this.paramName);
    if (newTheme != null) {
      ThemeResolver themeResolver = RequestContextUtils.getThemeResolver(request);
      if (themeResolver == null) {
        throw new IllegalStateException("No ThemeResolver found: not in a DispatcherServlet request?");
      }
      themeResolver.setThemeName(request, response, newTheme);
    }
    // Proceed in any case.
    return true;
  }

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   * storing the new theme name through the configured {@link ThemeResolver}.
   * @param theme the new theme
   * @see ThemeResolver#setThemeName
   */
  public void changeTheme(Theme theme) {
    ThemeResolver themeResolver = RequestContextUtils.getThemeResolver(this.request);
    if (themeResolver == null) {
      throw new IllegalStateException("Cannot change theme if no ThemeResolver configured");
    }
    themeResolver.setThemeName(this.request, this.response, (theme != null ? theme.getName() : null));
    this.theme = theme;
  }

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