109 lines
3.5 KiB
Java
109 lines
3.5 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.catalina.util;
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import java.util.HashSet;
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import java.util.Set;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.ConcurrentMap;
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import org.apache.tomcat.util.descriptor.web.ErrorPage;
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/**
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* Provides support for tracking per exception type and per HTTP status code
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* error pages.
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*/
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public class ErrorPageSupport {
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// Fully qualified class name to error page
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private ConcurrentMap<String, ErrorPage> exceptionPages = new ConcurrentHashMap<>();
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// HTTP status code to error page
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private ConcurrentMap<Integer, ErrorPage> statusPages = new ConcurrentHashMap<>();
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public void add(ErrorPage errorPage) {
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String exceptionType = errorPage.getExceptionType();
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if (exceptionType == null) {
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statusPages.put(Integer.valueOf(errorPage.getErrorCode()), errorPage);
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} else {
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exceptionPages.put(exceptionType, errorPage);
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}
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}
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public void remove(ErrorPage errorPage) {
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String exceptionType = errorPage.getExceptionType();
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if (exceptionType == null) {
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statusPages.remove(Integer.valueOf(errorPage.getErrorCode()), errorPage);
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} else {
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exceptionPages.remove(exceptionType, errorPage);
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}
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}
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public ErrorPage find(int statusCode) {
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return statusPages.get(Integer.valueOf(statusCode));
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}
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/**
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* Find the ErrorPage, if any, for the named exception type.
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*
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* @param exceptionType The fully qualified class name of the exception type
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*
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* @return The ErrorPage for the named exception type, or {@code null} if
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* none is configured
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*
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* @deprecated Unused. Will be removed in Tomcat 10.
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* Use {@link #find(Throwable)} instead.
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*/
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@Deprecated
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public ErrorPage find(String exceptionType) {
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return exceptionPages.get(exceptionType);
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}
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public ErrorPage find(Throwable exceptionType) {
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if (exceptionType == null) {
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return null;
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}
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Class<?> clazz = exceptionType.getClass();
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String name = clazz.getName();
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while (!Object.class.equals(clazz)) {
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ErrorPage errorPage = exceptionPages.get(name);
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if (errorPage != null) {
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return errorPage;
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}
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clazz = clazz.getSuperclass();
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if (clazz == null) {
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break;
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}
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name = clazz.getName();
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}
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return null;
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}
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public ErrorPage[] findAll() {
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Set<ErrorPage> errorPages = new HashSet<>();
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errorPages.addAll(exceptionPages.values());
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errorPages.addAll(statusPages.values());
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return errorPages.toArray(new ErrorPage[errorPages.size()]);
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}
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}
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