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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.config;
19  
20  /**
21   * Thrown when an error is encountered whilst attempting to set a property
22   * using the {@link PropertySetter} utility class.
23   * 
24   * @author Anders Kristensen
25   * @since 1.1
26   */
27  public class PropertySetterException extends Exception {
28    private static final long serialVersionUID = -1352613734254235861L;
29    protected Throwable rootCause;
30    
31    public
32    PropertySetterException(String msg) {
33      super(msg);
34    }
35    
36    public
37    PropertySetterException(Throwable rootCause)
38    {
39      super();
40      this.rootCause = rootCause;
41    }
42    
43    /**
44       Returns descriptive text on the cause of this exception.
45     */
46    public
47    String getMessage() {
48      String msg = super.getMessage();
49      if (msg == null && rootCause != null) {
50        msg = rootCause.getMessage();
51      }
52      return msg;
53    }
54  }