/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2014 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package io.undertow.servlet.core;

import io.undertow.util.StatusCodes;

import java.util.Map;

import javax.servlet.ServletException;

Class that maintains information about error page mappings.
Author:Stuart Douglas
/** * Class that maintains information about error page mappings. * * @author Stuart Douglas */
public class ErrorPages { private final Map<Integer, String> errorCodeLocations; private final Map<Class<? extends Throwable>, String> exceptionMappings; private final String defaultErrorPage; public ErrorPages(final Map<Integer, String> errorCodeLocations, final Map<Class<? extends Throwable>, String> exceptionMappings, final String defaultErrorPage) { this.errorCodeLocations = errorCodeLocations; this.exceptionMappings = exceptionMappings; this.defaultErrorPage = defaultErrorPage; } public String getErrorLocation(final int code) { String location = errorCodeLocations.get(code); if (location == null) { return defaultErrorPage; } return location; } public String getErrorLocation(final Throwable exception) { if (exception == null) { return null; } //todo: this is kinda slow, but there is probably not a great deal that can be done about it String location = null; for (Class c = exception.getClass(); c != null && location == null; c = c.getSuperclass()) { location = exceptionMappings.get(c); } if (location == null && exception instanceof ServletException) { Throwable rootCause = ((ServletException) exception).getRootCause(); if (rootCause != null) { for (Class c = rootCause.getClass(); c != null && location == null; c = c.getSuperclass()) { location = exceptionMappings.get(c); } } } if (location == null) { location = getErrorLocation(StatusCodes.INTERNAL_SERVER_ERROR); } return location; } }