content: /*
   * Copyright (c) 2005, 2020, Oracle and/or its affiliates.
   *
   * This program is free software; you can redistribute it and/or modify it under
   * the terms of the GNU General Public License, version 2.0, as published by the
   * Free Software Foundation.
   *
   * This program is also distributed with certain software (including but not
   * limited to OpenSSL) that is licensed under separate terms, as designated in a
   * particular file or component or in included license documentation. The
   * authors of MySQL hereby grant you an additional permission to link the
   * program and your derivative works with the separately licensed software that
   * they have included with MySQL.
   *
   * Without limiting anything contained in the foregoing, this file, which is
   * part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
   * version 1.0, a copy of which can be found at
   * http://oss.oracle.com/licenses/universal-foss-exception.
   *
   * This program is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
   * FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0,
   * for more details.
   *
   * You should have received a copy of the GNU General Public License along with
   * this program; if not, write to the Free Software Foundation, Inc.,
   * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
   */
  
  package com.mysql.cj.util;
  
  import com.mysql.cj.conf.PropertyDefinitions;
  
  public class LogUtils {
  
      public static final String CALLER_INFORMATION_NOT_AVAILABLE = "Caller information not available";
  
      private static final String LINE_SEPARATOR = System.getProperty(PropertyDefinitions.SYSP_line_separator);
  
      private static final int LINE_SEPARATOR_LENGTH = LINE_SEPARATOR.length();
  
      public static String findCallingClassAndMethod(Throwable t) {
          String stackTraceAsString = Util.stackTraceToString(t);
  
          String callingClassAndMethod = CALLER_INFORMATION_NOT_AVAILABLE;
  
          int endInternalMethods = Math.max(Math.max(stackTraceAsString.lastIndexOf("com.mysql.cj"), stackTraceAsString.lastIndexOf("com.mysql.cj.core")),
                  stackTraceAsString.lastIndexOf("com.mysql.cj.jdbc"));
  
          if (endInternalMethods != -1) {
              int endOfLine = stackTraceAsString.indexOf(LINE_SEPARATOR, endInternalMethods);
  
              if (endOfLine != -1) {
                  int nextEndOfLine = stackTraceAsString.indexOf(LINE_SEPARATOR, endOfLine + LINE_SEPARATOR_LENGTH);
                  callingClassAndMethod = nextEndOfLine != -1 ? stackTraceAsString.substring(endOfLine + LINE_SEPARATOR_LENGTH, nextEndOfLine)
                          : stackTraceAsString.substring(endOfLine + LINE_SEPARATOR_LENGTH);
              }
          }
  
          if (!callingClassAndMethod.startsWith("\tat ") && !callingClassAndMethod.startsWith("at ")) {
              return "at " + callingClassAndMethod;
          }
  
          return callingClassAndMethod;
      }
  
  }
  