【Java开源代码栏目提醒】:网学会员在Java开源代码频道为大家收集整理了LogFactory.java提供大家参考,希望对大家有所帮助!
/*
Copyright (C) 2002-2004 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of version 2 of the GNU General Public License as
published by the Free Software Foundation.
There are special exceptions to the terms and conditions of the GPL
as it is applied to this software. View the full text of the
exception in file EXCEPTIONS-CONNECTOR-J in the directory of this
software distribution.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package com.mysql.jdbc.log;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.sql.SQLException;
import com.mysql.jdbc.SQLError;
/**
* Creates instances of loggers for the driver to use.
*
* @author Mark Matthews
*
* @version $Id: LogFactory.java 3726 2005-05-19 15:52:24Z mmatthews $
*/
public class LogFactory {
/**
* Returns a logger instance of the given class, with the given instance
* name.
*
* @param className
* the class to instantiate
* @param instanceName
* the instance name
* @return a logger instance
* @throws SQLException
* if unable to create a logger instance
*/
public static Log getLogger(String className, String instanceName)
throws SQLException {
if (className == null) {
throw new SQLException("Logger class can not be NULL",
SQLError.SQL_STATE_ILLEGAL_ARGUMENT);
}
if (instanceName == null) {
throw new SQLException("Logger instance name can not be NULL",
SQLError.SQL_STATE_ILLEGAL_ARGUMENT);
}
try {
Class loggerClass = Class.forName(className);
Constructor constructor = loggerClass
.getConstructor(new Class[] { String.class });
return (Log) constructor.newInstance(new Object[] { instanceName });
} catch (ClassNotFoundException cnfe) {
throw new SQLException("Unable to load class for logger '"
+ className + "'", SQLError.SQL_STATE_ILLEGAL_ARGUMENT);
} catch (NoSuchMethodException nsme) {
throw new SQLException(
"Logger class does not have a single-arg constructor that takes an instance name",
SQLError.SQL_STATE_ILLEGAL_ARGUMENT);
} catch (InstantiationException inse) {
throw new SQLException("Unable to instantiate logger class '"
+ className + "', exception in constructor?",
SQLError.SQL_STATE_ILLEGAL_ARGUMENT);
} catch (InvocationTargetException ite) {
throw new SQLException("Unable to instantiate logger class '"
+ className + "', exception in constructor?",
SQLError.SQL_STATE_ILLEGAL_ARGUMENT);
} catch (IllegalAccessException iae) {
throw new SQLException("Unable to instantiate logger class '"
+ className + "', constructor not public",
SQLError.SQL_STATE_ILLEGAL_ARGUMENT);
} catch (ClassCastException cce) {
throw new SQLException("Logger class '" + className
+ "' does not implement the '" + Log.class.getName()
+ "' interface", SQLError.SQL_STATE_ILLEGAL_ARGUMENT);
}
}
}
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