public static Pattern globToRegexp()

in freemarker-docgen-core/src/main/java/org/freemarker/docgen/core/FileUtil.java [299:342]

• 41 lines of code
• 29 McCabe index (conditional complexity)

    public static Pattern globToRegexp(String text) {
        StringBuilder sb = new StringBuilder();
    
        if (!text.startsWith("/")) {
            text = "/" + text;
        }
        if (text.endsWith("/")) {
            text += "**";
        }
        
        char[] chars = text.toCharArray();
        int ln = chars.length;
        for (int i = 0; i < ln; i++) {
            char c = chars[i];
            if (c == '\\' || c == '^' || c == '.' || c == '$' || c == '|'
                    || c == '(' || c == ')' || c == '[' || c == ']'
                    || c == '+' || c == '{'
                    || c == '}' || c == '@') {
                sb.append('\\');
                sb.append(c);
            } else if (i == 0 && ln > 2
                    && chars[0] == '*' && chars[1] == '*'
                    && chars[2] == '/') {
                sb.append(".*/");
                i += 2;
            } else if (c == '/' && i + 2 < ln
                    && chars[i + 1] == '*' && chars[i + 2] == '*') {
                if (i + 3 == ln) {
                    sb.append("/.*");
                } else {
                    sb.append("(/.*)?");
                }
                i += 2;
            } else if (c == '*') {
                sb.append("[^/]*");
            } else if (c == '?') {
                sb.append("[^/]");
            } else {
                sb.append(c);
            }
        }
    
        return Pattern.compile(sb.toString());
    }