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18 package org.apache.log4j;
19 import org.apache.log4j.helpers.PatternParser;
20
21 /***
22
23 Example showing how to extend EnhancedPatternLayout to recognize additional
24 conversion characters.
25
26 <p>In this case MyPatternLayout recognizes %# conversion pattern. It
27 outputs the value of an internal counter which is also incremented
28 at each call.
29
30 <p>See <a href=doc-files/MyPatternLayout.java><b>source</b></a> code
31 for more details.
32
33 @see MyPatternParser
34 @see org.apache.log4j.EnhancedPatternLayout
35 @author Anders Kristensen
36 */
37 public class EnhancedMyPatternLayout extends EnhancedPatternLayout {
38 public
39 EnhancedMyPatternLayout() {
40 this(DEFAULT_CONVERSION_PATTERN);
41 }
42
43 public
44 EnhancedMyPatternLayout(String pattern) {
45 super(pattern);
46 }
47
48 public
49 PatternParser createPatternParser(String pattern) {
50 return new MyPatternParser(
51 pattern == null ? DEFAULT_CONVERSION_PATTERN : pattern);
52 }
53 }