Find Method Sign Line Number

 1 package java9;
 2 
 3 import java.io.IOException;
 4 import java.nio.file.Files;
 5 import java.nio.file.Paths;
 6 import java.util.List;
 7 import java.util.regex.Pattern;
 8 
 9 public class TTT {
10 
11     public static void main(String args[]) throws IOException {
12 
13         List<String> readAllLines = Files.readAllLines(Paths
14                 .get("/Users/hongtaowang/git/spring-boot-jpa-demo/src/main/java/com/my/app/web/IndexController.java"));
15 
16         int issueLine = 29;
17 
18         String preMethodSignNumber = getPreMethodSignNumber(issueLine, readAllLines);
19 
20         System.out.println(preMethodSignNumber);
21 
22         String preSignEndChar = getPreSignEndChar(readAllLines, issueLine);
23 
24         System.out.println(preSignEndChar);
25 
26     }
27 
28     private static String getPreSignEndChar(List<String> readAllLines, int issueLine) {
29         int nextMethodSignLine = getNextMethodSignNumber(issueLine, readAllLines);
30 
31         for (int endLineNumber = nextMethodSignLine - 1; endLineNumber > 0; endLineNumber--) {
32             String endChar = readAllLines.get(endLineNumber - 1);
33 
34             if (endChar.contains("}")) {
35                 return (endLineNumber) + " end     line " + endChar;
36             }
37 
38         }
39 
40         return "";
41     }
42 
43     private static int getNextMethodSignNumber(int i, List<String> readAllLines) {
44         int j = i;
45         for (; j < readAllLines.size(); j++) {
46             String p = readAllLines.get(j - 1);
47             boolean extracted = matchMethodSign(p);
48             if (extracted) {
49                 break;
50             }
51 
52         }
53         return j;
54     }
55 
56     private static String getPreMethodSignNumber(int currentLine, List<String> readAllLines) {
57         for (int preLine = currentLine - 1; preLine > 0; preLine--) {
58             String preLineSource = readAllLines.get(preLine - 1);
59 
60             if (matchMethodSign(preLineSource)) {
61                 return (preLine) + " end     line " + preLineSource;
62             }
63 
64         }
65 
66         return "";
67     }
68 
69     private static boolean matchMethodSign(String d) {
70         String pattern = ".*[A-z].* .*[A-z1-9]\\(.*";
71         boolean isMatch = Pattern.matches(pattern, d);
72         if (!isMatch) {
73             return false;
74         }
75 
76         if (d.contains("return")) {
77             return false;
78         }
79 
80         if (d.contains("=")) {
81             return false;
82         }
83 
84         return true;
85     }
86 
87 }