@SuppressWarnings("unchecked")
public SenseData decode(ByteBuffer buffer) throws IOException {
DataInputStream in = new DataInputStream(new ByteBufferInputStream(buffer));
int b1 = in.readUnsignedByte();
ResponseCode code = ResponseCode.valueOf((byte) (b1 & 0x7F)); // throws IOException
SenseData sense = null;
switch (code) {
case CURRENT_FIXED:
sense = new FixedSenseData();
break;
case CURRENT_DESCRIPTOR:
sense = new DescriptorSenseData();
break;
case DEFERRED_FIXED:
sense = new FixedSenseData();
break;
case DEFERRED_DESCRIPTOR:
sense = new DescriptorSenseData();
break;
}
sense.decode(new byte[] {(byte) b1}, buffer);
return sense;
}
public FixedSenseData(
boolean current,
KCQ kcq,
byte[] information,
byte[] commandSpecificInformation,
SenseKeySpecificField senseKeySpecific) {
super(
ResponseCode.valueOf(current, false),
kcq,
information,
commandSpecificInformation,
senseKeySpecific);
}
@Override
public void decode(byte[] header, ByteBuffer input) throws IOException {
assert header != null && header.length == 1 : "input header is invalid";
boolean valid = (header[0] & 0x80) != 0;
this.setResponseCode(ResponseCode.valueOf((byte) (header[0] & 0x7F)));
DataInputStream in = new DataInputStream(new ByteBufferInputStream(input));
// read in first segment of fixed format sense data
in.readByte();
int key = in.readUnsignedByte() & 0x0F; // TODO: FILEMARK, EOM, and ILI are unsupported
byte[] info = new byte[4];
in.read(info);
int length = in.readUnsignedByte() - 10; // length of next segment, minus required read-in
length = length < 0 ? 0 : length;
// read in the next segment of the fixed format sense data
byte[] cmdi = new byte[4];
in.read(cmdi);
int code = in.readUnsignedByte();
int qualifier = in.readUnsignedByte();
in.readByte();
this.senseKeySpecificBuffer = new byte[3];
in.read(this.senseKeySpecificBuffer);
// the rest of the additional sense bytes are ignored
// (vendor specific bytes not supported)
in.skip(length);
KCQ kcq = KCQ.valueOf(key, code, qualifier); // throws IOException on invalid values
// Set appropriate fields
this.setKcq(kcq);
this.setInformation(valid ? info : null);
this.setCommandSpecificInformation(cmdi);
// sense key specific buffer already set, will be decoded when exception is constructed.
}
