/*
* Copyright (c) 2002, 2018, Oracle and/or its affiliates. All rights reserved.
*
* 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.log;
import java.lang.reflect.
Constructor;
import java.lang.reflect.
InvocationTargetException;
import com.mysql.cj.exceptions.
ExceptionFactory;
import com.mysql.cj.exceptions.
WrongArgumentException;
import com.mysql.cj.util.
Util;
/**
* Creates instances of loggers for the driver to use.
*/
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
*/
public static
Log getLogger(
String className,
String instanceName) {
if (
className == null) {
throw
ExceptionFactory.
createException(
WrongArgumentException.class, "Logger class can not be NULL");
}
if (
instanceName == null) {
throw
ExceptionFactory.
createException(
WrongArgumentException.class, "Logger instance name can not be NULL");
}
try {
Class<?>
loggerClass = null;
try {
loggerClass =
Class.
forName(
className);
} catch (
ClassNotFoundException nfe) {
loggerClass =
Class.
forName(
Util.
getPackageName(
LogFactory.class) + "." +
className);
}
Constructor<?>
constructor =
loggerClass.
getConstructor(new
Class<?>[] {
String.class });
return (
Log)
constructor.
newInstance(new
Object[] {
instanceName });
} catch (
ClassNotFoundException cnfe) {
throw
ExceptionFactory.
createException(
WrongArgumentException.class, "Unable to load class for logger '" +
className + "'",
cnfe);
} catch (
NoSuchMethodException nsme) {
throw
ExceptionFactory.
createException(
WrongArgumentException.class,
"Logger class does not have a single-arg constructor that takes an instance name",
nsme);
} catch (
InstantiationException inse) {
throw
ExceptionFactory.
createException(
WrongArgumentException.class,
"Unable to instantiate logger class '" +
className + "', exception in constructor?",
inse);
} catch (
InvocationTargetException ite) {
throw
ExceptionFactory.
createException(
WrongArgumentException.class,
"Unable to instantiate logger class '" +
className + "', exception in constructor?",
ite);
} catch (
IllegalAccessException iae) {
throw
ExceptionFactory.
createException(
WrongArgumentException.class,
"Unable to instantiate logger class '" +
className + "', constructor not public",
iae);
} catch (
ClassCastException cce) {
throw
ExceptionFactory.
createException(
WrongArgumentException.class,
"Logger class '" +
className + "' does not implement the '" +
Log.class.
getName() + "' interface",
cce);
}
}
}