Java Throwable to Calling Class Method findCallingClassAndMethod(Throwable t)

Description

find Calling Class And Method

License

Open Source License

Declaration

public static String findCallingClassAndMethod(Throwable t) 

Method Source Code

//package com.java2s;
/*/*w w w . j  a va 2  s  . c o m*/
 Copyright (c) 2005, 2014, Oracle and/or its affiliates. All rights reserved.

 The MySQL Connector/J is licensed under the terms of the GPLv2
 <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors.
 There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
 this software, see the FLOSS License Exception
 <http://www.mysql.com/about/legal/licensing/foss-exception.html>.

 This program is free software; you can redistribute it and/or modify it under the terms
 of the GNU General Public License as published by the Free Software Foundation; version 2
 of the License.

 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 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

 */

import com.mysql.jdbc.Util;

public class Main {
    public static final String CALLER_INFORMATION_NOT_AVAILABLE = "Caller information not available";
    private static final String LINE_SEPARATOR = System
            .getProperty("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 = stackTraceAsString
                .lastIndexOf("com.mysql.jdbc");

        if (endInternalMethods != -1) {
            int endOfLine = -1;
            int compliancePackage = stackTraceAsString.indexOf(
                    "com.mysql.jdbc.compliance", endInternalMethods);

            if (compliancePackage != -1) {
                endOfLine = compliancePackage - LINE_SEPARATOR_LENGTH;
            } else {
                endOfLine = stackTraceAsString.indexOf(LINE_SEPARATOR,
                        endInternalMethods);
            }

            if (endOfLine != -1) {
                int nextEndOfLine = stackTraceAsString.indexOf(
                        LINE_SEPARATOR, endOfLine + LINE_SEPARATOR_LENGTH);

                if (nextEndOfLine != -1) {
                    callingClassAndMethod = stackTraceAsString.substring(
                            endOfLine + LINE_SEPARATOR_LENGTH,
                            nextEndOfLine);
                } else {
                    callingClassAndMethod = stackTraceAsString
                            .substring(endOfLine + LINE_SEPARATOR_LENGTH);
                }
            }
        }

        if (!callingClassAndMethod.startsWith("\tat ")
                && !callingClassAndMethod.startsWith("at ")) {
            return "at " + callingClassAndMethod;
        }

        return callingClassAndMethod;
    }
}

Related

1. startWithClass(Throwable throwable, Class clazz)