Java Context.findErrorPage方法代碼示例

import org.apache.catalina.Context; //導入方法依賴的package包/類
/**
 * Find and return the ErrorPage instance for the specified exception's
 * class, or an ErrorPage instance for the closest superclass for which
 * there is such a definition.  If no associated ErrorPage instance is
 * found, return <code>null</code>.
 *
 * @param context The Context in which to search
 * @param exception The exception for which to find an ErrorPage
 */
private static ErrorPage findErrorPage
    (Context context, Throwable exception) {

    if (exception == null)
        return (null);
    Class<?> clazz = exception.getClass();
    String name = clazz.getName();
    while (!Object.class.equals(clazz)) {
        ErrorPage errorPage = context.findErrorPage(name);
        if (errorPage != null)
            return (errorPage);
        clazz = clazz.getSuperclass();
        if (clazz == null)
            break;
        name = clazz.getName();
    }
    return (null);

}
 

import org.apache.catalina.Context; //導入方法依賴的package包/類
/**
 * Find and return the ErrorPage instance for the specified exception's
 * class, or an ErrorPage instance for the closest superclass for which
 * there is such a definition.  If no associated ErrorPage instance is
 * found, return <code>null</code>.
 *
 * @param context The Context in which to search
 * @param exception The exception for which to find an ErrorPage
 */
protected static ErrorPage findErrorPage
    (Context context, Throwable exception) {

    if (exception == null)
        return (null);
    Class<?> clazz = exception.getClass();
    String name = clazz.getName();
    while (!Object.class.equals(clazz)) {
        ErrorPage errorPage = context.findErrorPage(name);
        if (errorPage != null)
            return (errorPage);
        clazz = clazz.getSuperclass();
        if (clazz == null)
            break;
        name = clazz.getName();
    }
    return (null);

}
 

import org.apache.catalina.Context; //導入方法依賴的package包/類
/**
 * Find and return the ErrorPage instance for the specified exception's
 * class, or an ErrorPage instance for the closest superclass for which
 * there is such a definition.  If no associated ErrorPage instance is
 * found, return <code>null</code>.
 *
 * @param context The Context in which to search
 * @param exception The exception for which to find an ErrorPage
 */
protected static ErrorPage findErrorPage
    (Context context, Throwable exception) {

    if (exception == null)
        return (null);
    Class clazz = exception.getClass();
    String name = clazz.getName();
    while (!"java.lang.Object".equals(clazz)) {
        ErrorPage errorPage = context.findErrorPage(name);
        if (errorPage != null)
            return (errorPage);
        clazz = clazz.getSuperclass();
        if (clazz == null)
            break;
        name = clazz.getName();
    }
    return (null);

}
 

import org.apache.catalina.Context; //導入方法依賴的package包/類
/**
 * Find and return the ErrorPage instance for the specified exception's
 * class, or an ErrorPage instance for the closest superclass for which
 * there is such a definition. If no associated ErrorPage instance is found,
 * return <code>null</code>.
 *
 * @param context
 *            The Context in which to search
 * @param exception
 *            The exception for which to find an ErrorPage
 */
private static ErrorPage findErrorPage(Context context, Throwable exception) {

	if (exception == null)
		return (null);
	Class<?> clazz = exception.getClass();
	String name = clazz.getName();
	while (!Object.class.equals(clazz)) {
		ErrorPage errorPage = context.findErrorPage(name);
		if (errorPage != null)
			return (errorPage);
		clazz = clazz.getSuperclass();
		if (clazz == null)
			break;
		name = clazz.getName();
	}
	return (null);

}
 

import org.apache.catalina.Context; //導入方法依賴的package包/類
/**
 * Handle the HTTP status code (and corresponding message) generated
 * while processing the specified Request to produce the specified
 * Response.  Any exceptions that occur during generation of the error
 * report are logged and swallowed.
 *
 * @param request The request being processed
 * @param response The response being generated
 */
protected void status(Request request, Response response) {

    // Do nothing on non-HTTP responses
    if (!(response instanceof HttpResponse))
        return;
    HttpResponse hresponse = (HttpResponse) response;
    if (!(response.getResponse() instanceof HttpServletResponse))
        return;
    int statusCode = hresponse.getStatus();
    String message = RequestUtil.filter(hresponse.getMessage());
    if (message == null)
        message = "";

    // Handle a custom error page for this status code
    Context context = request.getContext();
    if (context == null)
        return;

    ErrorPage errorPage = context.findErrorPage(statusCode);
    if (errorPage != null) {
        response.setAppCommitted(false);
        ServletRequest sreq = request.getRequest();
        ServletResponse sresp = response.getResponse();
        sreq.setAttribute(Globals.STATUS_CODE_ATTR,
                          new Integer(statusCode));
        sreq.setAttribute(Globals.ERROR_MESSAGE_ATTR,
                          message);
        Wrapper wrapper = request.getWrapper();
        if (wrapper != null)
            sreq.setAttribute(Globals.SERVLET_NAME_ATTR,
                              wrapper.getName());
        if (sreq instanceof HttpServletRequest)
            sreq.setAttribute(Globals.EXCEPTION_PAGE_ATTR,
                              ((HttpServletRequest) sreq).getRequestURI());
        if (custom(request, response, errorPage)) {
            try {
                sresp.flushBuffer();
            } catch (IOException e) {
                log("Exception Processing " + errorPage, e);
            }
        }
    }

}