@Override
public void format(ByteArrayOutputStream buf) {
if (buf == null) {
return;
}
// Text string object
int tag = 0x80 | ComprehensionTlvTag.TEXT_STRING.value();
buf.write(tag); // tag
byte[] data;
if (mIsYesNo) {
data = new byte[1];
data[0] = mYesNoResponse ? GET_INKEY_YES : GET_INKEY_NO;
} else if (mInData != null && mInData.length() > 0) {
try {
// ETSI TS 102 223 8.15, should use the same format as in SMS messages
// on the network.
if (mIsUcs2) {
// ucs2 is by definition big endian.
data = mInData.getBytes("UTF-16BE");
} else if (mIsPacked) {
byte[] tempData = GsmAlphabet.stringToGsm7BitPacked(mInData, 0, 0);
// The size of the new buffer will be smaller than the original buffer
// since 7-bit GSM packed only requires ((mInData.length * 7) + 7) / 8 bytes.
// And we don't need to copy/store the first byte from the returned array
// because it is used to store the count of septets used.
data = new byte[tempData.length - 1];
System.arraycopy(tempData, 1, data, 0, tempData.length - 1);
} else {
data = GsmAlphabet.stringToGsm8BitPacked(mInData);
}
} catch (UnsupportedEncodingException e) {
data = new byte[0];
} catch (EncodeException e) {
data = new byte[0];
}
} else {
data = new byte[0];
}
// length - one more for data coding scheme.
// ETSI TS 102 223 Annex C (normative): Structure of CAT communications
// Any length within the APDU limits (up to 255 bytes) can thus be encoded on two bytes.
// This coding is chosen to remain compatible with TS 101.220.
// Note that we need to reserve one more byte for coding scheme thus the maximum APDU
// size would be 254 bytes.
if (data.length + 1 <= 255) {
writeLength(buf, data.length + 1);
} else {
data = new byte[0];
}
// data coding scheme
if (mIsUcs2) {
buf.write(0x08); // UCS2
} else if (mIsPacked) {
buf.write(0x00); // 7 bit packed
} else {
buf.write(0x04); // 8 bit unpacked
}
for (byte b : data) {
buf.write(b);
}
}
