/**
* Internal use only.
*
* <p>Creates a new service request using the <code>data</code> byte array and information from
* the KNXnet/IP header, but leaves out the cEMI part.<br>
* This helper will not try to create the cEMI structure contained in the data part, i.e. the
* returned service request is incomplete and {@link ServiceRequest#getCEMI()} returns <code>null
* </code>. The service request must not be used for the creation of KNXnet/IP packets.
*
* @param h KNXnet/IP header associated with <code>data</code>
* @param data byte array containing the data following the KNXnet/IP header in the message
* structure
* @param offset offset into <code>data</code> pointing at the begin of usable data
* @return the new empty service request
* @throws KNXFormatException if the data buffer is too short for the request or unsupported
* connection header structure
*/
public static ServiceRequest getEmptyServiceRequest(KNXnetIPHeader h, byte[] data, int offset)
throws KNXFormatException {
return new ServiceRequest(
h.getServiceType(), data, offset, h.getTotalLength() - h.getStructLength(), null);
}
/**
* Creates a packet with a KNXnet/IP message header v1.0, containing the specified service <code>
* type</code>, and generates the corresponding byte representation of this structure.
*
* @param type service type to pack
* @return the packet as byte array
*/
public static byte[] toPacket(ServiceType type) {
final KNXnetIPHeader h = new KNXnetIPHeader(type.svcType, type.getStructLength());
final ByteArrayOutputStream os = new ByteArrayOutputStream(h.getTotalLength());
os.write(h.toByteArray(), 0, h.getStructLength());
return type.toByteArray(os);
}
