public static Interrogation fromEncodedMessage(EncodedAISMessage encodedMessage) {
if (!encodedMessage.isValid()) throw new InvalidEncodedMessage(encodedMessage);
if (!encodedMessage.getMessageType().equals(AISMessageType.Interrogation))
throw new UnsupportedMessageType(encodedMessage.getMessageType().getCode());
int messageLength = encodedMessage.getNumberOfBits();
Integer repeatIndicator = DecoderImpl.convertToUnsignedInteger(encodedMessage.getBits(6, 8));
MMSI sourceMmsi =
MMSI.valueOf(DecoderImpl.convertToUnsignedLong(encodedMessage.getBits(8, 38)));
MMSI mmsi1 = MMSI.valueOf(DecoderImpl.convertToUnsignedLong(encodedMessage.getBits(40, 70)));
Integer type1_1 = DecoderImpl.convertToUnsignedInteger(encodedMessage.getBits(70, 76));
Integer offset1_1 = DecoderImpl.convertToUnsignedInteger(encodedMessage.getBits(76, 88));
Integer type1_2 =
messageLength > 88
? DecoderImpl.convertToUnsignedInteger(encodedMessage.getBits(90, 96))
: null;
Integer offset1_2 =
messageLength > 88
? DecoderImpl.convertToUnsignedInteger(encodedMessage.getBits(96, 108))
: null;
MMSI mmsi2 =
messageLength > 160
? MMSI.valueOf(DecoderImpl.convertToUnsignedLong(encodedMessage.getBits(110, 140)))
: null;
Integer type2_1 =
messageLength > 160
? DecoderImpl.convertToUnsignedInteger(encodedMessage.getBits(140, 146))
: null;
Integer offset2_1 =
messageLength > 160
? DecoderImpl.convertToUnsignedInteger(encodedMessage.getBits(146, 158))
: null;
return new Interrogation(
repeatIndicator,
sourceMmsi,
mmsi1,
type1_1,
offset1_1,
type1_2,
offset1_2,
mmsi2,
type2_1,
offset2_1);
}
public static PositionReportClassAAssignedSchedule fromEncodedMessage(
EncodedAISMessage encodedMessage) {
if (!encodedMessage.isValid()) throw new InvalidEncodedMessage(encodedMessage);
if (!encodedMessage
.getMessageType()
.equals(AISMessageType.PositionReportClassAAssignedSchedule))
throw new UnsupportedMessageType(encodedMessage.getMessageType().getCode());
Integer repeatIndicator = DecoderImpl.convertToUnsignedInteger(encodedMessage.getBits(6, 8));
MMSI sourceMmsi =
MMSI.valueOf(DecoderImpl.convertToUnsignedLong(encodedMessage.getBits(8, 38)));
NavigationStatus navigationStatus =
NavigationStatus.fromInteger(
DecoderImpl.convertToUnsignedInteger(encodedMessage.getBits(38, 42)));
Integer rateOfTurn = DecoderImpl.convertToSignedInteger(encodedMessage.getBits(42, 50));
Float speedOverGround =
DecoderImpl.convertToUnsignedFloat(encodedMessage.getBits(50, 60)) / 10f;
Boolean positionAccurate = DecoderImpl.convertToBoolean(encodedMessage.getBits(60, 61));
Float longitude = DecoderImpl.convertToFloat(encodedMessage.getBits(61, 89)) / 600000f;
Float latitude = DecoderImpl.convertToFloat(encodedMessage.getBits(89, 116)) / 600000f;
Float courseOverGround =
DecoderImpl.convertToUnsignedFloat(encodedMessage.getBits(116, 128)) / 10f;
Integer trueHeading = DecoderImpl.convertToUnsignedInteger(encodedMessage.getBits(128, 137));
Integer second = DecoderImpl.convertToUnsignedInteger(encodedMessage.getBits(137, 143));
ManeuverIndicator maneuverIndicator =
ManeuverIndicator.fromInteger(
DecoderImpl.convertToUnsignedInteger(encodedMessage.getBits(143, 145)));
Boolean raimFlag = DecoderImpl.convertToBoolean(encodedMessage.getBits(148, 149));
return new PositionReportClassAAssignedSchedule(
AISMessageType.PositionReportClassAAssignedSchedule,
repeatIndicator,
sourceMmsi,
navigationStatus,
rateOfTurn,
speedOverGround,
positionAccurate,
latitude,
longitude,
courseOverGround,
trueHeading,
second,
maneuverIndicator,
raimFlag);
}
