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package org.reprap.comms.messages;
import java.io.IOException;
import org.reprap.Device;
import org.reprap.comms.IncomingContext;
import org.reprap.comms.IncomingMessage;
import org.reprap.comms.OutgoingMessage;
/**
*
*/
public abstract class IncomingIntMessage extends IncomingMessage {
/**
* @param incomingContext
* @throws IOException
*/
public IncomingIntMessage(IncomingContext incomingContext)
throws IOException {
super(incomingContext);
}
/**
* @param device
* @param message
* @param timeout
* @throws IOException
*/
public IncomingIntMessage(Device device, OutgoingMessage message, long timeout)
throws IOException
{
super(device, message, timeout);
}
/**
* @param b1
* @param b2
* @return integer
*/
public static int ConvertBytesToInt(byte b1, byte b2) {
int low = b1;
int high = b2;
if (low < 0) low += 256;
if (high < 0) high += 256;
return low + (high << 8);
}
/**
* @return value
* @throws InvalidPayloadException
*/
public int getValue() throws InvalidPayloadException {
byte [] reply = getPayload();
if (reply == null || reply.length != 3)
throw new InvalidPayloadException();
return ConvertBytesToInt(reply[1], reply[2]);
}
/* (non-Javadoc)
* @see org.reprap.comms.IncomingMessage#isExpectedPacketType(byte)
*/
abstract protected boolean isExpectedPacketType(byte packetType);
}
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