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1
4 package com.tc.exception;
5
6 public class ExceptionWrapperImpl implements ExceptionWrapper {
7
8 private final int MAX_STAR_COUNT = 79;
9
10 public String  wrap(String message) {
11 message = (message == null) ? String.valueOf(message) : message;
12 int starCount = longestLineCharCount(message);
13 if(starCount > MAX_STAR_COUNT) {
14 starCount = MAX_STAR_COUNT;
15 }
16 return "\n" + getStars(starCount) + "\n" + message
17 + "\n" + getStars(starCount) + "\n";
18 }
19
20 private String getStars(int starCount) {
21 StringBuffer stars = new StringBuffer ();
22 while(starCount-- > 0) {
23 stars.append('*');
24 }
25 return stars.toString();
26 }
27
28 private int longestLineCharCount(String message) {
29 int count = 0;
30 int sidx = 0, eidx = 0;
31 while ((eidx = message.indexOf('\n', sidx)) >= 0) {
32 if (count < (eidx - sidx)) {
33 count = (eidx - sidx);
34 }
35 sidx = eidx + 1;
36 }
37 if (sidx < message.length() && count < (message.length() - sidx)) {
38 count = (message.length() - sidx);
39 }
40 return count;
41 }
42
43 }
44
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Java API By Example, From Geeks To Geeks.