// An alias (or commonly called "nickname") is:
// Nickname must begin with a letter.
// Only letters a-z, numbers 0-9, or . are allowed in Nickname field.
public static boolean isAlias(String string) {
if (!MmsConfig.isAliasEnabled()) {
return false;
}
int len = string == null ? 0 : string.length();
if (len < MmsConfig.getAliasMinChars() || len > MmsConfig.getAliasMaxChars()) {
return false;
}
if (!Character.isLetter(string.charAt(0))) { // Nickname begins with a letter
return false;
}
for (int i = 1; i < len; i++) {
char c = string.charAt(i);
if (!(Character.isLetterOrDigit(c) || c == '.')) {
return false;
}
}
return true;
}
