org.deegree.crs.components
Class PrimeMeridian

java.lang.Object
  org.deegree.crs.Identifiable
      org.deegree.crs.components.PrimeMeridian

public class PrimeMeridian
extends Identifiable

The PrimeMeridian class saves the longitude to the greenwich meridian.

Version:

$Revision:$, $Date:$

Author:

Rutger Bezema, last edited by: $Author:$

Field Summary

static PrimeMeridian

GREENWICH The PrimeMeridian of greenwich with epsg:8901 code and radian units.

Constructor Summary

PrimeMeridian(Unit units, double longitude, String identifier)

PrimeMeridian(Unit units, double longitude, String[] identifiers)

PrimeMeridian(Unit units, double longitude, String[] identifiers, String[] names, String[] versions, String[] descriptions, String[] areasOfUse)

PrimeMeridian(Unit units, double longitude, String identifier, String name, String version, String description, String areaOfUse)

PrimeMeridian(Unit units, String[] identifiers)
A Prime meredian with 0 degrees longitude from the greenwich meridian.

PrimeMeridian(Unit units, String identifier, String name)
A Prime meredian with 0 degrees longitude from the greenwich meridian.

Method Summary

boolean	equals(Object other)
Unit	getAngularUnit()
double	getLongitude()
double	getLongitude(Unit targetUnit)
int	hashCode() Implementation as proposed by Joshua Block in Effective Java (Addison-Wesley 2001), which supplies an even distribution and is relatively fast.
String	toString()

Methods inherited from class org.deegree.crs.Identifiable

checkForNullObject, checkForNullObject, getAreaOfUse, getAreasOfUse, getDescription, getDescriptions, getIdAndName, getIdentifier, getIdentifiers, getName, getNames, getVersion, getVersions

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

GREENWICH

public static final PrimeMeridian GREENWICH

The PrimeMeridian of greenwich with epsg:8901 code and radian units.

Constructor Detail

PrimeMeridian

public PrimeMeridian(Unit units,
                     double longitude,
                     String[] identifiers,
                     String[] names,
                     String[] versions,
                     String[] descriptions,
                     String[] areasOfUse)

Parameters:

units - Angular units of longitude, normally radians.

longitude - (in given units) normally radians.

identifiers -

names -

versions -

descriptions -

areasOfUse -

PrimeMeridian

public PrimeMeridian(Unit units,
                     double longitude,
                     String identifier,
                     String name,
                     String version,
                     String description,
                     String areaOfUse)

Parameters:

units - Angular units of longitude.

longitude -

identifier -

name -

version -

description -

areaOfUse -

PrimeMeridian

public PrimeMeridian(Unit units,
                     double longitude,
                     String[] identifiers)

Parameters:

units - Angular units of longitude.

longitude -

identifiers -

PrimeMeridian

public PrimeMeridian(Unit units,
                     double longitude,
                     String identifier)

Parameters:

units - Angular units of longitude.

longitude -

identifier -

PrimeMeridian

public PrimeMeridian(Unit units,
                     String[] identifiers)

A Prime meredian with 0 degrees longitude from the greenwich meridian.

Parameters:

units - Angular units of longitude.

identifiers -

PrimeMeridian

public PrimeMeridian(Unit units,
                     String identifier,
                     String name)

A Prime meredian with 0 degrees longitude from the greenwich meridian.

Parameters:

units - Angular units of longitude.

identifier -

name - human readable name

Method Detail

getLongitude

public double getLongitude()

Returns:

the longitude value relative to the Greenwich Meridian. The longitude is expressed in this objects angular units.

getLongitude

public double getLongitude(Unit targetUnit)

Parameters:

targetUnit - The unit in which to express longitude.

Returns:

the longitude value relative to the Greenwich Meridian, expressed in the specified units. This convenience method make easier to obtains longitude in degrees (getLongitude(Unit.DEGREE)), no matter the underlying angular unit of this prime meridian.

getAngularUnit

public Unit getAngularUnit()

Returns:

the angular unit.

equals

public boolean equals(Object other)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Identifiable

hashCode

public int hashCode()

Implementation as proposed by Joshua Block in Effective Java (Addison-Wesley 2001), which supplies an even distribution and is relatively fast. It is created from field f as follows:

• boolean -- code = (f ? 0 : 1)
• byte, char, short, int -- code = (int)f
• long -- code = (int)(f ^ (f >>>32))
• float -- code = Float.floatToIntBits(f);
• double -- long l = Double.doubleToLongBits(f); code = (int)(l ^ (l >>> 32))
• all Objects, (where equals( ) calls equals( ) for this field) -- code = f.hashCode( )
• Array -- Apply above rules to each element

Combining the hash code(s) computed above: result = 37 * result + code;

Overrides:

hashCode in class Object

Returns:

(int) ( result >>> 32 ) ^ (int) result;

See Also:

Object.hashCode()