Package gaiasky.util.gaia

Class BaseAttitudeDataServer<A extends Attitude>

java.lang.Object
gaiasky.util.gaia.BaseAttitudeDataServer<A>
Type Parameters:
A - type of Attitude that the server is serving
Direct Known Subclasses:
AnalyticalAttitudeDataServer, NumericalAttitudeDataServer
public abstract class BaseAttitudeDataServer<A extends Attitude>
extends java.lang.Object
Common base class for all attitude data servers. This holds all common fields e.g. the time origin for relative time scales (in ns) and implements getAttitude(long) in terms of getAttitude(long) which is the same for all servers. The time context and its possible switch is implemented in a thread-safe manner. Derived classes should hence be likewise thread-safe.

  • Field Summary

    Fields
    Modifier and Type Field Description
    protected boolean initialized
    Some scanning laws have constants or tables for interpolation that need to be computed before the first use and recomputed after changing certain reference values.
    protected TimeContext initialRequestedTimeContext  
    protected TimeContext nativeTimeContext
    native and initially requested time context of the server - has to be set by the implementing class
    protected boolean withUncertaintiesCorrelations
    switch to decide if attitude uncertainties and correlations should be calculated

  • Constructor Summary

    Constructors
    Constructor Description
    BaseAttitudeDataServer()  

  • Method Summary

    Modifier and Type Method Description
    A getAttitude​(long time)  
    A getAttitude​(java.util.Date date)  
    protected abstract A getAttitudeNative​(long time)
    Evaluate the attitude in the native time system of the server
    long getRefTime()  
    boolean isInitialized()  
    void setInitialized​(boolean initialized)  
    void setRefTime​(long t)  

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • initialized

      protected boolean initialized
      Some scanning laws have constants or tables for interpolation that need to be computed before the first use and recomputed after changing certain reference values. This flag indicates that the constants or tables (whatever applicable) are up to date.

    • nativeTimeContext

      protected TimeContext nativeTimeContext
      native and initially requested time context of the server - has to be set by the implementing class

    • initialRequestedTimeContext

      protected TimeContext initialRequestedTimeContext

    • withUncertaintiesCorrelations

      protected boolean withUncertaintiesCorrelations
      switch to decide if attitude uncertainties and correlations should be calculated

  • Constructor Details

    • BaseAttitudeDataServer

      public BaseAttitudeDataServer()

  • Method Details

    • isInitialized

      public boolean isInitialized()
      Returns:
      Returns the initialised.

    • setInitialized

      public void setInitialized​(boolean initialized)

    • getAttitude

      public A getAttitude​(java.util.Date date)

    • getAttitude

      public A getAttitude​(long time)
      Parameters:
      time - The elapsed time in nanoseconds since J2010

    • getAttitudeNative

      protected abstract A getAttitudeNative​(long time)
      Evaluate the attitude in the native time system of the server

    • setRefTime

      public void setRefTime​(long t)
      Parameters:
      t - Reference time in nanoseconds (jd)

    • getRefTime

      public long getRefTime()
      Returns:
      The reference time in ns