Due to validation, german umlauts (ä, ö, ü) and the sz-character (ß) are not supported as filter attributes .
`
switch (c)
{
case ' ':
case '(':
case ')':
break loop;
case '+':
case '-':
case '.':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
case 'G':
case 'H':
case 'I':
case 'J':
case 'K':
case 'L':
case 'M':
case 'N':
case 'O':
case 'P':
case 'Q':
case 'R':
case 'S':
case 'T':
case 'U':
case 'V':
case 'W':
case 'X':
case 'Y':
case 'Z':
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
case 'g':
case 'h':
case 'i':
case 'j':
case 'k':
case 'l':
case 'm':
case 'n':
case 'o':
case 'p':
case 'q':
case 'r':
case 's':
case 't':
case 'u':
case 'v':
case 'w':
case 'x':
case 'y':
case 'z':
// These are all OK.
currentPos++;
break;
case '/':
case ':':
case ';':
case '<':
case '=':
case '>':
case '?':
case '@':
case '[':
case '\\':
case ']':
case '^':
case '_':
case '`':
// These are not allowed, but they are explicitly called out because
// they are included in the range of values between '-' and 'z', and
// making sure all possible characters are included can help make
// the switch statement more efficient. We'll fall through to the
// default clause to reject them.
default:
final String msg = String.format(
"Invalid character '%c' in a number or boolean value at " +
"position %d",
c, currentPos);
throw new IllegalArgumentException(msg);`
Due to validation, german umlauts (ä, ö, ü) and the sz-character (ß) are not supported as filter attributes .
` switch (c) { case ' ': case '(': case ')': break loop;