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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.log4j;

import java.util.Enumeration;

import org.apache.log4j.spi.LoggerFactory;
import org.apache.log4j.spi.LoggerRepository;
import org.apache.log4j.spi.RepositorySelector;

/**
 * Use the LogManager class to retreive {@link Logger}
 * instances or to operate on the current {@link
 * LoggerRepository}. When the LogManager class is loaded
 * into memory the default initalzation procedure is inititated. The
 * default intialization procedure is described in the short log4j manual.
 *
 * @author Ceki Gülcü */
public class LogManager {

  /**
   * @deprecated This variable is for internal use only. It will
   * become package protected in future versions.
   *
   */
  public static final String DEFAULT_CONFIGURATION_FILE = "log4j.properties";

  /**
   * @deprecated This variable is for internal use only. It will
   * become private in future versions.
   *
   */
  public static final String DEFAULT_CONFIGURATION_KEY = "log4j.configuration";

  /**
   * @deprecated This variable is for internal use only. It will
   * become private in future versions.
   *
   */
  public static final String CONFIGURATOR_CLASS_KEY = "log4j.configuratorClass";

  /**
   * @deprecated This variable is for internal use only. It will
   * become private in future versions.
   */
  public static final String DEFAULT_INIT_OVERRIDE_KEY = "log4j.defaultInitOverride";

  /**
     Sets LoggerFactory but only if the correct
     guard is passed as parameter.
     
     Initally the guard is null.  If the guard is
     null, then invoking this method sets the logger
     factory and the guard. Following invocations will throw a {@link
     IllegalArgumentException}, unless the previously set
     guard is passed as the second parameter.

     
This allows a high-level component to set the {@link
     RepositorySelector} used by the LogManager.
     
     For example, when tomcat starts it will be able to install its
     own repository selector. However, if and when Tomcat is embedded
     within JBoss, then JBoss will install its own repository selector
     and Tomcat will use the repository selector set by its container,
     JBoss.  */
  static
  public
  void setRepositorySelector(RepositorySelector selector, Object guard) 
                                                 throws IllegalArgumentException {
  }

  static
  public
  LoggerRepository getLoggerRepository() {
      return null;
  }

  /**
     Retrieve the appropriate root logger.
   */
  public
  static 
  Logger getRootLogger() {
     // Delegate the actual manufacturing of the logger to the logger repository.
    return null;
  }

  /**
     Retrieve the appropriate {@link Logger} instance.  
  */
  public
  static 
  Logger getLogger(final String name) {
     // Delegate the actual manufacturing of the logger to the logger repository.
    return null;
  }

 /**
     Retrieve the appropriate {@link Logger} instance.  
  */
  public
  static 
  Logger getLogger(final Class clazz) {
     // Delegate the actual manufacturing of the logger to the logger repository.
    return null;
  }


  /**
     Retrieve the appropriate {@link Logger} instance.  
  */
  public
  static 
  Logger getLogger(final String name, final LoggerFactory factory) {
     // Delegate the actual manufacturing of the logger to the logger repository.
    return null;
  }  

  public
  static
  Logger exists(final String name) {
    return null;
  }

  public
  static
  Enumeration getCurrentLoggers() {
    return null;
  }

  public
  static
  void shutdown() {
  }

  public
  static
  void resetConfiguration() {
  }
    
  public static Logger getLogger(String name, String group, LoggerFactory factory) {
    return null;
  }

  public static Logger getLogger(String name, String group) {
    return null;
  }
}