How to use

getErrorPage

method

in

org.apache.tomcat.util.descriptor.web.LoginConfig

@Override
protected boolean forwardToErrorPageInternal(Request request, HttpServletResponse response, Object loginConfig) throws IOException {
  if (loginConfig == null) return false;
  LoginConfig config = (LoginConfig)loginConfig;
  if (config.getErrorPage() == null) return false;
  // had to do this to get around compiler/IDE issues :(
  try {
    Method method = null;
    /*
    for (Method m : getClass().getDeclaredMethods()) {
      if (m.getName().equals("forwardToErrorPage")) {
        method = m;
        break;
      }
    }
    */
    method = FormAuthenticator.class.getDeclaredMethod("forwardToErrorPage", Request.class, HttpServletResponse.class, LoginConfig.class);
    method.setAccessible(true);
    method.invoke(this, request, response, config);
  } catch (Exception e) {
    throw new RuntimeException(e);
  }
  return true;
}

@Override
protected boolean forwardToErrorPageInternal(Request request, HttpServletResponse response, Object loginConfig) throws IOException {
  if (loginConfig == null) return false;
  LoginConfig config = (LoginConfig)loginConfig;
  if (config.getErrorPage() == null) return false;
  // had to do this to get around compiler/IDE issues :(
  try {
    Method method = null;
    /*
    for (Method m : getClass().getDeclaredMethods()) {
      if (m.getName().equals("forwardToErrorPage")) {
        method = m;
        break;
      }
    }
    */
    method = FormAuthenticator.class.getDeclaredMethod("forwardToErrorPage", Request.class, HttpServletResponse.class, LoginConfig.class);
    method.setAccessible(true);
    method.invoke(this, request, response, config);
  } catch (Exception e) {
    throw new RuntimeException(e);
  }
  return true;
}

  throws IOException {
String errorPage = config.getErrorPage();
if (errorPage == null || errorPage.length() == 0) {
  String msg = sm.getString("formAuthenticator.noErrorPage",
  (config.getErrorPage());
try {
  if (context.fireRequestInitEvent(request)) {

  throws IOException {
String errorPage = config.getErrorPage();
if (errorPage == null || errorPage.length() == 0) {
  String msg = sm.getString("formAuthenticator.noErrorPage",
    context.getServletContext().getRequestDispatcher(config.getErrorPage());
try {
  if (context.fireRequestInitEvent(request.getRequest())) {

  this.redirectTo(request, response, request.getServletPath());
} else {
  this.redirectTo(request, response, loginConfig.getErrorPage());

  throws IOException {
String errorPage = config.getErrorPage();
if (errorPage == null || errorPage.length() == 0) {
  String msg = sm.getString("formAuthenticator.noErrorPage",
    context.getServletContext().getRequestDispatcher(config.getErrorPage());
try {
  if (context.fireRequestInitEvent(request.getRequest())) {

  this.redirectTo(request, response, request.getServletPath());
} else {
  this.redirectTo(request, response, loginConfig.getErrorPage());

  this.redirectTo(request, response, request.getServletPath());
} else {
  this.redirectTo(request, response, loginConfig.getErrorPage());

  this.redirectTo(request, response, request.getServletPath());
} else {
  this.redirectTo(request, response, loginConfig.getErrorPage());

  this.redirectTo(request, response, request.getServletPath());
} else {
  this.redirectTo(request, response, loginConfig.getErrorPage());

  this.redirectTo(request, response, request.getServletPath());
} else {
  this.redirectTo(request, response, loginConfig.getErrorPage());

  this.redirectTo(request, response, request.getServletPath());
} else {
  this.redirectTo(request, response, loginConfig.getErrorPage());

String errorPage = config.getErrorPage();
if ((errorPage != null) && !errorPage.startsWith("/")) {
  if (isServlet22()) {

String errorPage = config.getErrorPage();
if ((errorPage != null) && !errorPage.startsWith("/")) {
  if (isServlet22()) {

String errorPage = config.getErrorPage();
if ((errorPage != null) && !errorPage.startsWith("/")) {
  if (isServlet22()) {

appendElement(sb,INDENT4, "realm-name",
    loginConfig.getRealmName());
if (loginConfig.getErrorPage() != null ||
      loginConfig.getLoginPage() != null) {
  sb.append("    <form-login-config>\n");
      loginConfig.getLoginPage());
  appendElement(sb, INDENT6, "form-error-page",
      loginConfig.getErrorPage());
  sb.append("    </form-login-config>\n");

appendElement(sb,INDENT4, "realm-name",
    loginConfig.getRealmName());
if (loginConfig.getErrorPage() != null ||
      loginConfig.getLoginPage() != null) {
  sb.append("    <form-login-config>\n");
      loginConfig.getLoginPage());
  appendElement(sb, INDENT6, "form-error-page",
      loginConfig.getErrorPage());
  sb.append("    </form-login-config>\n");

appendElement(sb,INDENT4, "realm-name",
    loginConfig.getRealmName());
if (loginConfig.getErrorPage() != null ||
      loginConfig.getLoginPage() != null) {
  sb.append("    <form-login-config>\n");
      loginConfig.getLoginPage());
  appendElement(sb, INDENT6, "form-error-page",
      loginConfig.getErrorPage());
  sb.append("    </form-login-config>\n");