1    /*
2     * ====================================================================
3     * The Apache Software License, Version 1.1
4     *
5     * Copyright (c) 2002 The Apache Software Foundation.  All rights
6     * reserved.
7     *
8     * Redistribution and use in source and binary forms, with or without
9     * modification, are permitted provided that the following conditions
10    * are met:
11    *
12    * 1. Redistributions of source code must retain the above copyright
13    *    notice, this list of conditions and the following disclaimer.
14    *
15    * 2. Redistributions in binary form must reproduce the above copyright
16    *    notice, this list of conditions and the following disclaimer in
17    *    the documentation and/or other materials provided with the
18    *    distribution.
19    *
20    * 3. The end-user documentation included with the redistribution,
21    *    if any, must include the following acknowledgment:
22    *       "This product includes software developed by the
23    *        Apache Software Foundation (http://www.apache.org/)."
24    *    Alternately, this acknowledgment may appear in the software itself,
25    *    if and wherever such third-party acknowledgments normally appear.
26    *
27    * 4. The names "Apache" and "Apache Software Foundation" and
28    *    "Apache POI" must not be used to endorse or promote products
29    *    derived from this software without prior written permission. For
30    *    written permission, please contact apache@apache.org.
31    *
32    * 5. Products derived from this software may not be called "Apache",
33    *    "Apache POI", nor may "Apache" appear in their name, without
34    *    prior written permission of the Apache Software Foundation.
35    *
36    * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
37    * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
38    * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
39    * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
40    * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41    * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
42    * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
43    * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
44    * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
45    * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
46    * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
47    * SUCH DAMAGE.
48    * ====================================================================
49    *
50    * This software consists of voluntary contributions made by many
51    * individuals on behalf of the Apache Software Foundation.  For more
52    * information on the Apache Software Foundation, please see
53    * <http://www.apache.org/>.
54    */
55   package org.apache.poi.util;
56   
57   import java.util.HashMap;
58   import java.util.Map;
59   
60   /**
61    * Provides logging without clients having to mess with
62    * configuration/initialization.
63    *
64    * @author Andrew C. Oliver (acoliver at apache dot org)
65    * @author Marc Johnson (mjohnson at apache dot org)
66    * @author Nicola Ken Barozzi (nicolaken at apache.org)
67    */
68   
69   public class POILogFactory
70   {
71   //    private static LogFactory _creator = LogFactory.getFactory();
72   
73       // map of POILogger instances, with classes as keys
74       private static Map _loggers = new HashMap();;
75   
76   
77       /**
78        * construct a POILogFactory.
79        */
80   
81       private POILogFactory()
82       {
83       }
84   
85       /**
86        * Get a logger, based on a class name
87        *
88        * @param theclass the class whose name defines the log
89        *
90        * @return a POILogger for the specified class
91        */
92   
93       public static POILogger getLogger( final Class theclass )
94       {
95           return getLogger( theclass.getName() );
96       }
97   
98       /**
99        * Get a logger, based on a String
100       *
101       * @param cat the String that defines the log
102       *
103       * @return a POILogger for the specified class
104       */
105  
106      public static POILogger getLogger( final String cat )
107      {
108          POILogger logger = null;
109  
110          if ( _loggers.containsKey( cat ) )
111          {
112              logger = (POILogger) _loggers.get( cat );
113          }
114          else
115          {
116              logger = new POILogger( );
117              _loggers.put( cat, logger );
118          }
119          return logger;
120      }
121  
122  }   // end public class POILogFactory
123