rootcategory.java

log4j的源码

/*
 * Copyright 1999-2005 The Apache Software Foundation.
 * 
 * Licensed 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.spi;

import  org.apache.log4j.*;
import  org.apache.log4j.helpers.LogLog;

// Contibutors: Mathias Bogaert

/**
 * @deprecated Replaced by {@link RootLogger}.  
 */
final public class RootCategory extends Logger {

  /**
     The root category names itself as "root". However, the root
     category cannot be retrieved by name.  
  */
  public
  RootCategory(Level level) {
    super("root");
    setLevel(level);
  }

  
  /**
     Return the assigned level value without walking the category
     hierarchy.
  */
  final
  public 
  Level getChainedLevel() {
    return level;
  }

  /**
     Setting a null value to the level of the root category may have catastrophic
     results. We prevent this here.

     @since 0.8.3 */
  final  
  public
  void setLevel(Level level) {
    if(level == null) {
      LogLog.error("You have tried to set a null level to root.",
		   new Throwable());
    }
    else {
      this.level = level;
    }
  }

  final  
  public
  void setPriority(Level level) {
    setLevel(level);
  }

  
}