Package org.orekit.gnss.metric.parser

Class AbstractEncodedMessage

java.lang.Object
org.orekit.gnss.metric.parser.AbstractEncodedMessage
All Implemented Interfaces:
EncodedMessage
Direct Known Subclasses:
ByteArrayEncodedMessage, HexadecimalSequenceEncodedMessage, InputStreamEncodedMessage, StreamMonitor
public abstract class AbstractEncodedMessage extends Object implements EncodedMessage
Encoded messages as a sequence of bytes.

Note that only full bytes are supported. This means that for example the 300 bits message from GPS sub-frames must be completed with 4 zero bits to reach 304 bits = 38 bytes, even if only the first 300 bits will be decoded and the 4 extra bits in the last byte will be ignored.

Since:
11.0
Author:
Luc Maisonobe

  • Constructor Details

    • AbstractEncodedMessage

      protected AbstractEncodedMessage()
      Empty constructor.

      This constructor is not strictly necessary, but it prevents spurious javadoc warnings with JDK 18 and later.

      Since:
      12.0

  • Method Details

    • start

      public void start()
      Start message extraction.
      Specified by:
      start in interface EncodedMessage

    • fetchByte

      protected abstract int fetchByte()
      Fetch the next byte from the message.
      Returns:
      next byte from the message, as a primitive integer, or -1 if end of data has been reached

    • extractBits

      public long extractBits(int n)
      Extract the next n bits from the encoded message.
      Specified by:
      extractBits in interface EncodedMessage
      Parameters:
      n - number of bits to extract (cannot exceed 32 bits)
      Returns:
      bits packed as the LSB of a 64 bits primitive long