stella.parameter
Class SiderealTime

java.lang.Object
  util.PropertyContainer
      util.PropertyResources
          util.PropertyBundles
              stella.parameter.AbstractParameter
                  stella.parameter.AbstractValue
                      stella.parameter.SiderealTime

All Implemented Interfaces:

Cloneable, Parameter, Increasing<Number>, ParameterDepending, Value, ExitCleaning, Initializable, LocalizedSupplying, PropertySupplying, Reloadable, ResourceSupplying

public class SiderealTime
extends AbstractValue
implements Increasing<Number>, ParameterDepending, Reloadable

And yet another implementation of a sidereal time computation. This time we follow the general Value contract. Therefore, two other globals must be registered, Time and Longitude.

This is a very simple sidereal time algorithmus (linear in time) which may proove to be unsatisfying for the STELLA purpose.

Nested Class Summary

static class

SiderealTime.Now Reads the first command line argument and parses it into a date.

Nested classes/interfaces inherited from class util.PropertyResources

PropertyResources.URLResource

Field Summary

private static double[]	CONST Constants required for the algorithm.
private static String	DEFLONGITUDE The name of this global (sidereal).
static String	DEFNAME The name of this global (sidereal).
private static String	DEFTIME The name of this global (sidereal).
static String	KEY_LONGITUDE The name of the latitude to use.
static String	KEY_TIME The name of the latitude to use.
private Value	longitude The longitude of Teide, degrees.
private Value	time The UT time in ms.

Fields inherited from class stella.parameter.AbstractParameter

KEY_FORMAT, KEY_NAME, KEY_PRESERVE, UNKNOWN

Fields inherited from class util.PropertyBundles

KEY_LOCALECOUNTRY, KEY_LOCALELANGUAGE, KEY_RESOURCEBUNDLES

Fields inherited from class util.PropertyResources

KEY_NOINITONCREATE, localurl, locate, POSTFIX_DIR, POSTFIX_EXT, POSTFIX_FILE, POSTFIX_LIST, POSTFIX_URL, urlset

Fields inherited from class util.PropertyContainer

KEY_LISTSEPARATOR, KEY_MAPKEYVALUECHAR, KEY_MAPSEPARATOR

Fields inherited from interface util.PropertySupplying

CONFIG, KEY_CLASS

Fields inherited from interface util.ResourceSupplying

KEY_URLRESOURCES, KEY_URLUSECONFIG, KEY_URLUSECURRENT, KEY_URLUSEHOME

Constructor Summary

SiderealTime(Map<String,String> info)
Constructs a new sidereal time object.

Method Summary

Double	getAscendTime(Number until) Returns the remaining time in ms.
String	getFormatted() Returns a formatted version of the sidereal time.
static double	getLocalApparentSiderealTime(double jd, double lamdeg) Returns the apparent local sidereal time for the given jd and the given longitude, return value is in degrees.
Number	getValue() Returns the sidereal time in degrees, wrapped into a Double.
void	registerParameter(Parameter what) Registers the required additional globals for the sidereal time.
double	rescanned(String key, String old, String newval) As any parameter depending instance we fail if the parameter we depend on is now a different one.
Number	setValue(Number val) Sets the sidereal time.

Methods inherited from class stella.parameter.AbstractValue

get, set

Methods inherited from class stella.parameter.AbstractParameter

createParameter, delivers, exit, getFormatted, getName, getPreserveFile, getString, getString, init, register, setName, toString

Methods inherited from class util.PropertyBundles

clone, getLocalized, getLocalized, getLocalizedString, getLocalizedString, loadResource

Methods inherited from class util.PropertyResources

createFrom, createFrom, createFrom, getApplet, getAsResources, getLocalClassLoader, getPropertiesToKey, getPropertiesToKey, getResource, getResourceAsStream, getResourceFromKey, getResources, keyCreate, keyCreate, reload, setApplet

Methods inherited from class util.PropertyContainer

augment, augment, augment, defaultBoolean, defaultChar, defaultDouble, defaultFloat, defaultInt, defaultLong, defaultObject, defaultObject, defaultProperties, defaultProperty, getAsBoolean, getAsChar, getAsDouble, getAsEnums, getAsFloat, getAsInt, getAsList, getAsLong, getAsMap, getAsMap, getAsObject, getAsObject, getProperties, getProperty, has, isNew, parseObject, reload, removeProperty, setObject, setProperties, setProperty, stringProperties

Methods inherited from class java.lang.Object

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

Methods inherited from interface util.Reloadable

reload

Methods inherited from interface stella.Parameter

getName, getString

Methods inherited from interface util.PropertySupplying

defaultBoolean, defaultChar, defaultDouble, defaultFloat, defaultInt, defaultLong, defaultObject, defaultObject, defaultProperties, defaultProperty, getAsBoolean, getAsChar, getAsDouble, getAsFloat, getAsInt, getAsList, getAsLong, getAsMap, getAsObject, getAsObject, getProperties, getProperty, has, parseObject, removeProperty, setObject, setProperty, stringProperties

Methods inherited from interface util.Initializable

init

Methods inherited from interface util.ResourceSupplying

getResource, getResourceAsStream, getResources

Field Detail

KEY_LONGITUDE

public static final String KEY_LONGITUDE

The name of the latitude to use.

See Also:

Constant Field Values

KEY_TIME

public static final String KEY_TIME

The name of the latitude to use.

See Also:

Constant Field Values

DEFNAME

public static final String DEFNAME

The name of this global (sidereal).

See Also:

Constant Field Values

DEFLONGITUDE

private static final String DEFLONGITUDE

The name of this global (sidereal).

See Also:

Constant Field Values

DEFTIME

private static final String DEFTIME

The name of this global (sidereal).

See Also:

Constant Field Values

CONST

private static final double[] CONST

Constants required for the algorithm.

time

private Value time

The UT time in ms.

longitude

private Value longitude

The longitude of Teide, degrees.

Constructor Detail

SiderealTime

public SiderealTime(Map<String,String> info)

Constructs a new sidereal time object. Note that this global can only function correctly after the time and longitude have been registered.

Method Detail

rescanned

public double rescanned(String key,
                        String old,
                        String newval)

As any parameter depending instance we fail if the parameter we depend on is now a different one.

Specified by:

rescanned in interface Reloadable

Overrides:

rescanned in class AbstractParameter

setValue

public Number setValue(Number val)
                throws UnsupportedOperationException

Sets the sidereal time. The sidereal time is a read-only variable, therefore this method throws an UnsupportedOperationException.

Specified by:

setValue in interface Value

Throws:

UnsupportedOperationException

getValue

public Number getValue()

Returns the sidereal time in degrees, wrapped into a Double. Note that this method returns null if either the globals denoting the time or the Teide longitude are missing.

Specified by:

getValue in interface Value

getLocalApparentSiderealTime

public static double getLocalApparentSiderealTime(double jd,
                                                  double lamdeg)

Returns the apparent local sidereal time for the given jd and the given longitude, return value is in degrees.

registerParameter

public void registerParameter(Parameter what)

Registers the required additional globals for the sidereal time. For this particular object, latitude and UT is required. Note that the argumental global is checked for being of instance types of Time or Longitude, rather than querrying for the global name.

Specified by:

registerParameter in interface ParameterDepending

getAscendTime

public Double getAscendTime(Number until)

Returns the remaining time in ms.

Specified by:

getAscendTime in interface Increasing<Number>

Parameters:

until - The value in the future.

Returns:

A double carrying the remaining time or null if the time cannot be calculated.

getFormatted

public String getFormatted()

Returns a formatted version of the sidereal time.

Specified by:

getFormatted in interface Parameter

Overrides:

getFormatted in class AbstractParameter