Pattern Matcher SFDC

gistfile1.java

public static String extractRefId(String orgId, String testString) {
    pattern myPattern = pattern.compile('(?m).*\\[ ref:(.*)\\.(.*):ref \\].*');
    matcher myMatcher = myPattern.matcher(testString);

    if (myMatcher.matches()) {
        if (myMatcher.group(1) == orgId) {
            return myMatcher.group(2);
        }
    }
   
    return null;
}