1    import org.apache.log4j.Logger; 
2     
3    /** 
4     * <p> 
5     * Wraps a Log4j Logger.  This non-public class is the one actually interacting 
6     * with the log4j.jar library.  That way LogWrapper can safely attempt to use 
7     * log4j.jar, but still degrade gracefully and provide logging via standard-out 
8     * even if log4j is unavailable. 
9     * <p> 
10    * The interactions with log4j.jar could be done directly inside LogWrapper 
11    * as long as the Java code is compiled by Java 1.4 or greater (still works 
12    * at runtime in Java 1.3).  The interactions with log4j.jar only need to be 
13    * pushed out into a separate class like this for people using a Java 1.3 
14    * compiler, which creates bytecode that is more strict with depedency 
15    * checking. 
16    * 
17    * @author Credit Union Central of British Columbia 
18    * @author <a href="http://www.cucbc.com/">www.cucbc.com</a> 
19    * @author <a href="mailto:juliusdavies@cucbc.com">juliusdavies@cucbc.com</a> 
20    * @since 3-Aug-2006 
21    */ 
22   final class LogHelper 
23   { 
24     private final Logger l; 
25     LogHelper( Class c )              { l = Logger.getLogger( c ); } 
26     LogHelper( String s )             { l = Logger.getLogger( s ); } 
27     void debug(Object o)              { l.debug(o);                } 
28     void debug(Object o, Throwable t) { l.debug(o,t);              } 
29     void info (Object o)              { l.info(o);                 } 
30     void info (Object o, Throwable t) { l.info(o,t);               } 
31     void warn (Object o)              { l.warn(o);                 } 
32     void warn (Object o, Throwable t) { l.warn(o,t);               } 
33     void error(Object o)              { l.error(o);                } 
34     void error(Object o, Throwable t) { l.error(o,t);              } 
35     void fatal(Object o)              { l.fatal(o);                } 
36     void fatal(Object o, Throwable t) { l.fatal(o,t);              } 
37     boolean isDebugEnabled()          { return l.isDebugEnabled(); } 
38     boolean isInfoEnabled()           { return l.isInfoEnabled();  } 
39     Object getLog4jLogger()           { return l;                  } 
40   } 
41