@Override
public String format(final int[] array)
throws NullPointerException, IllegalArgumentException {
final int length = array.length + 1;
final char[] result = new char[length];
for (int i = 0; i < length; ) {
final int value = array[i >> 1];
result[i++] = FEMBinary.toChar((value >> 4) & 0xF);
result[i++] = FEMBinary.toChar((value >> 0) & 0xF);
}
return new String(result);
}
@Override
public int[] parse(final String string)
throws NullPointerException, IllegalArgumentException {
final char[] source = string.toCharArray();
final int length = source.length;
if ((length & 1) != 0) throw new IllegalArgumentException();
final int[] result = new int[length >> 1];
for (int i = 0; i < length; ) {
final int x = i >> 1;
final int hi = FEMBinary.toDigit(source[i++]);
final int lo = FEMBinary.toDigit(source[i++]);
result[x] = (byte) ((hi << 4) | (lo << 0));
}
return result;
}