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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    * 
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   * 
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.apache.log4j.spi;
19  
20  import org.apache.log4j.Level;
21  import org.apache.log4j.Logger;
22  import org.apache.log4j.helpers.LogLog;
23  
24  // Contibutors: Mathias Bogaert
25  
26  /**
27   * @deprecated Replaced by {@link RootLogger}.  
28   */
29  final public class RootCategory extends Logger {
30  
31    /**
32       The root category names itself as "root". However, the root
33       category cannot be retrieved by name.  
34    */
35    public
36    RootCategory(Level level) {
37      super("root");
38      setLevel(level);
39    }
40  
41    
42    /**
43       Return the assigned level value without walking the category
44       hierarchy.
45    */
46    final
47    public 
48    Level getChainedLevel() {
49      return level;
50    }
51  
52    /**
53       Setting a null value to the level of the root category may have catastrophic
54       results. We prevent this here.
55  
56       @since 0.8.3 */
57    final  
58    public
59    void setLevel(Level level) {
60      if(level == null) {
61        LogLog.error("You have tried to set a null level to root.",
62  		   new Throwable());
63      }
64      else {
65        this.level = level;
66      }
67    }
68  
69    final  
70    public
71    void setPriority(Level level) {
72      setLevel(level);
73    }
74  
75    
76  }