001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache license, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the license for the specific language governing permissions and 015 * limitations under the license. 016 */ 017package org.apache.logging.log4j.core.appender.db.jpa.converter; 018 019import javax.persistence.AttributeConverter; 020import javax.persistence.Converter; 021 022import org.apache.logging.log4j.util.Strings; 023 024/** 025 * A JPA 2.1 attribute converter for {@link StackTraceElement}s in {@link org.apache.logging.log4j.core.LogEvent}s. This 026 * converter is capable of converting both to and from {@link String}s. 027 */ 028@Converter(autoApply = false) 029public class StackTraceElementAttributeConverter implements AttributeConverter<StackTraceElement, String> { 030 private static final int UNKNOWN_SOURCE = -1; 031 032 private static final int NATIVE_METHOD = -2; 033 034 @Override 035 public String convertToDatabaseColumn(final StackTraceElement element) { 036 if (element == null) { 037 return null; 038 } 039 040 return element.toString(); 041 } 042 043 @Override 044 public StackTraceElement convertToEntityAttribute(final String s) { 045 if (Strings.isEmpty(s)) { 046 return null; 047 } 048 049 return StackTraceElementAttributeConverter.convertString(s); 050 } 051 052 static StackTraceElement convertString(final String s) { 053 final int open = s.indexOf("("); 054 055 final String classMethod = s.substring(0, open); 056 final String className = classMethod.substring(0, classMethod.lastIndexOf(".")); 057 final String methodName = classMethod.substring(classMethod.lastIndexOf(".") + 1); 058 059 final String parenthesisContents = s.substring(open + 1, s.indexOf(")")); 060 061 String fileName = null; 062 int lineNumber = UNKNOWN_SOURCE; 063 if ("Native Method".equals(parenthesisContents)) { 064 lineNumber = NATIVE_METHOD; 065 } else if (!"Unknown Source".equals(parenthesisContents)) { 066 final int colon = parenthesisContents.indexOf(":"); 067 if (colon > UNKNOWN_SOURCE) { 068 fileName = parenthesisContents.substring(0, colon); 069 try { 070 lineNumber = Integer.parseInt(parenthesisContents.substring(colon + 1)); 071 } catch (final NumberFormatException ignore) { 072 // we don't care 073 } 074 } else { 075 fileName = parenthesisContents.substring(0); 076 } 077 } 078 079 return new StackTraceElement(className, methodName, fileName, lineNumber); 080 } 081}