61 lines
2.1 KiB
Java
61 lines
2.1 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.jasper.runtime;
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import java.lang.reflect.InvocationTargetException;
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/**
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* Utilities for handling Throwables and Exceptions.
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*/
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public class ExceptionUtils {
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/**
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* Checks whether the supplied Throwable is one that needs to be
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* rethrown and swallows all others.
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* @param t the Throwable to check
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*/
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public static void handleThrowable(Throwable t) {
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if (t instanceof ThreadDeath) {
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throw (ThreadDeath) t;
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}
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if (t instanceof StackOverflowError) {
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// Swallow silently - it should be recoverable
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return;
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}
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if (t instanceof VirtualMachineError) {
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throw (VirtualMachineError) t;
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}
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// All other instances of Throwable will be silently swallowed
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}
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/**
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* Checks whether the supplied Throwable is an instance of
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* <code>InvocationTargetException</code> and returns the throwable that is
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* wrapped by it, if there is any.
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*
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* @param t the Throwable to check
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* @return <code>t</code> or <code>t.getCause()</code>
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*/
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public static Throwable unwrapInvocationTargetException(Throwable t) {
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if (t instanceof InvocationTargetException && t.getCause() != null) {
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return t.getCause();
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}
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return t;
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}
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}
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