| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.felix.log; |
| |
| /** |
| * Implementation dependent exception class used to avoid references to any |
| * bundle defined exception class, which might prevent an uninstalled bundle |
| * from being garbage collected. This exception maintains the class of the |
| * original exception (as part of the message), the message (appended to the |
| * class name) and the stack trace of both the exception thrown and any |
| * embedded exceptions. |
| */ |
| final class LogException extends Exception |
| { |
| /** The class name of the original exception. */ |
| private final String m_className; |
| /** The message from the original exception. */ |
| private final String m_message; |
| /** The localized message from the original exception. */ |
| private final String m_localizedMessage; |
| |
| /** |
| * Create a new instance. |
| * @param exception the original exception. |
| */ |
| private LogException(final Throwable exception) |
| { |
| m_className = exception.getClass().getName(); |
| m_message = exception.getMessage(); |
| m_localizedMessage = exception.getLocalizedMessage(); |
| setStackTrace(exception.getStackTrace()); |
| |
| Throwable cause = exception.getCause(); |
| if (cause != null) |
| { |
| cause = getException(cause); |
| initCause(cause); |
| } |
| } |
| |
| /** |
| * Returns the message associated with the exception. The message |
| * will be the class name of the original exception followed by the |
| * message of the original exception. |
| * @return the message associated with the exception |
| */ |
| public String getMessage() |
| { |
| return m_className + ": " + m_message; |
| } |
| |
| /** |
| * Returns the localized message associated with the exception. The |
| * localized message will be the class name of the original exception |
| * followed by the localized message of the original exception. |
| * @return the localized message associated with the exception |
| */ |
| public String getLocalizedMessage() |
| { |
| return m_className + ": " + m_localizedMessage; |
| } |
| |
| /** The prefix that identifies classes from the "java" namespace. */ |
| private static final String JAVA_PACKAGE_PREFIX = "java."; |
| |
| /** |
| * Returns the exception to store in the {@link LogEntry}. |
| * @param exception the exception that was originally thrown. |
| * @return the exception to store in the {@link LogEntry} |
| */ |
| static Throwable getException(final Throwable exception) |
| { |
| Throwable result = null; |
| |
| if (exception != null) |
| { |
| String className = exception.getClass().getName(); |
| if (exception.getCause() == null && className.startsWith(JAVA_PACKAGE_PREFIX)) |
| { |
| result = exception; |
| } |
| else |
| { |
| result = new LogException(exception); |
| } |
| } |
| |
| return result; |
| } |
| } |