/**
* parses a single record
*
* @param response of heat pump
* @param RecordDefinition that shall be used for parsing the heat pump response
* @return string value of the parse response
* @throws StiebelHeatPumpException
*/
public String parseRecord(byte[] response, RecordDefinition recordDefinition)
throws StiebelHeatPumpException {
try {
if (response.length < 2) {
logger.error(
"response does not have a valid length of bytes: {}", DataParser.bytesToHex(response));
throw new StiebelHeatPumpException();
}
ByteBuffer buffer = ByteBuffer.wrap(response);
short number = 0;
byte[] bytes = null;
switch (recordDefinition.getLength()) {
case 1:
bytes = new byte[1];
System.arraycopy(response, recordDefinition.getPosition(), bytes, 0, 1);
number = Byte.valueOf(buffer.get(recordDefinition.getPosition()));
break;
case 2:
bytes = new byte[2];
System.arraycopy(response, recordDefinition.getPosition(), bytes, 0, 2);
number = buffer.getShort(recordDefinition.getPosition());
break;
}
if (recordDefinition.getBitPosition() > 0) {
int returnValue = getBit(bytes, recordDefinition.getBitPosition());
return String.valueOf(returnValue);
}
if (recordDefinition.getScale() != 1.0) {
double myDoubleNumber = number * recordDefinition.getScale();
myDoubleNumber = Math.round(myDoubleNumber * 100.0) / 100.0;
String returnString = String.format("%s", myDoubleNumber);
return returnString;
}
return String.valueOf(number);
} catch (Exception e) {
logger.error(
"response {} could not be parsed for record definition {} ",
DataParser.bytesToHex(response),
recordDefinition.getName());
throw new StiebelHeatPumpException();
}
}
/**
* composes the new value of a record definition into a updated set command that can be send back
* to heat pump
*
* @param response of heat pump that should be updated with new value
* @param RecordDefinition that shall be used for compose the new value into the heat pump set
* command
* @param string value to be compose
* @return byte[] ready to send to heat pump
* @throws StiebelHeatPumpException
*/
public byte[] composeRecord(String value, byte[] response, RecordDefinition recordDefinition)
throws StiebelHeatPumpException {
short newValue = 0;
if (recordDefinition.getDataType() != Type.Settings) {
logger.warn(
"The record {} can not be set as it is not a setable value!", recordDefinition.getName());
throw new StiebelHeatPumpException("record is not a setting!");
}
double number = Double.parseDouble(value);
if (number > recordDefinition.getMax() || number < recordDefinition.getMin()) {
logger.warn(
"The record {} can not be set to value {} as allowed range is {}<-->{} !",
recordDefinition.getName(),
value,
recordDefinition.getMax(),
recordDefinition.getMin());
throw new StiebelHeatPumpException("invalid value !");
}
// change response byte to setting command
response[1] = SET;
// reverse the scale
if (recordDefinition.getScale() != 1.0) {
number = number / recordDefinition.getScale();
newValue = (short) number;
}
// set new bit values in a byte
if (recordDefinition.getBitPosition() > 0) {
byte[] abyte = new byte[] {response[recordDefinition.getPosition()]};
abyte = setBit(abyte, recordDefinition.getBitPosition(), newValue);
response[recordDefinition.getPosition()] = abyte[0];
return response;
}
// create byte values for single and double byte values
// and update response
switch (recordDefinition.getLength()) {
case 1:
byte newByteValue = (byte) number;
response[recordDefinition.getPosition()] = newByteValue;
break;
case 2:
byte[] newByteValues = shortToByte(newValue);
int position = recordDefinition.getPosition();
response[position] = newByteValues[1];
response[position + 1] = newByteValues[0];
break;
}
response[2] = this.calculateChecksum(response);
response = this.addDuplicatedBytes(response);
logger.debug(
"Updated record {} at position {} to value {}.",
recordDefinition.getName(),
recordDefinition.getPosition(),
value);
return response;
}