/**
* constructs HooMEResponse from input stream
*
* @param in deserialization input source
* @throws java.io.IOException if I/O problem
* @throws BadAttributeValueException if bad data value
*/
public HooMEResponse(MessageInput in) throws java.io.IOException, BadAttributeValueException {
super(in);
this.resultList = new ArrayList<Result>();
int payloadLength = HooMEUtilities.getUnsignedInt(in.getScanner().readShort());
long expecting = 0;
byte rawMatches = in.getScanner().readByte();
int mul = 8; // cobined size in octets of file id and size for every result
short rawPort = in.getScanner().readShort();
byte[] addressArray = new byte[Consts.FOUR_BITS];
for (int i = 0; i < Consts.FOUR_BITS; i++) {
addressArray[i] = in.getScanner().readByte();
}
this.setResponseHost(
new InetSocketAddress(
InetAddress.getByAddress(addressArray), HooMEUtilities.getUnsignedInt(rawPort)));
long matches = HooMEUtilities.getUnsignedLongInt(rawMatches);
expecting = (mul * matches);
for (long i = 0; i < matches; i++) {
Result aResult = new Result(in);
// check to see if we have exceeded the specified payload length and throw exception
if ((aResult.getFileName().length() + expecting) > payloadLength
|| (aResult.getFileName().length() + expecting) > Consts.MAX_UNSIGNED_SHORT) {
throw new BadAttributeValueException(Consts.ILL_ARG);
} else {
expecting += aResult.getFileName().length();
this.addResult(aResult);
}
}
}
/**
* checks to see if we have not exceeded the allowable number of bytes in a payload
*
* @param result the result that is being added
* @return true if not bad attribute
*/
public boolean validateSize(Result result) {
int existingResultSize = 8; // size of a result object with an empty string
int count = 28; // combined size of all fields currently in the hoome response class
count +=
existingResultSize
+ result
.getFileName()
.length(); // add the length result to be added to the current count
for (Result aResult : this.resultList) {
count += existingResultSize + aResult.getFileName().length();
if (count > Consts.MAX_UNSIGNED_SHORT) {
return false;
}
}
return true;
}
/** overides encode in HooMEMessage */
@Override
public void encode(MessageOutput out) throws java.io.IOException {
super.encode(out);
int payLoadLength = 0;
for (Result aResult : this.resultList) {
payLoadLength += aResult.getFileName().length() + 1;
}
// add header for result
payLoadLength += (Consts.FOUR_BITS + Consts.FOUR_BITS) * this.resultList.size();
// add the header for response
payLoadLength += 1 + Consts.TWO_BITS + Consts.FOUR_BITS;
out.getDataOutputStream().writeShort((short) payLoadLength);
out.getDataOutputStream().writeByte((byte) this.resultList.size());
out.getDataOutputStream().writeShort((short) this.responseHost.getPort());
out.getDataOutputStream().write(this.responseHost.getAddress().getAddress());
for (Result aResult : this.resultList) {
aResult.encode(out);
}
}
