visad.data.netcdf
Class StandardQuantityDB

java.lang.Object
  visad.data.netcdf.QuantityDB
      visad.data.netcdf.QuantityDBImpl
          visad.data.netcdf.StandardQuantityDB

All Implemented Interfaces:

Serializable

public final class StandardQuantityDB
extends QuantityDBImpl

The following class implements a database of standard quantities. It is implemented as a singleton. Instances of the class are modifiable.

Author:

Steven R. Emmerson

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class visad.data.netcdf.QuantityDBImpl

QuantityDBImpl.Iterator, QuantityDBImpl.NameIterator, QuantityDBImpl.NameKey, QuantityDBImpl.QuantityIterator, QuantityDBImpl.UnitKey

Field Summary

Fields inherited from class visad.data.netcdf.QuantityDB

emptyDB

Method Summary

QuantityDB	add(String[] definitions, String[] aliases) Adds the given quantities and aliases to the database.
void	add(String name, String unitSpec) Adds a quantity to the database given a name and a display unit specification.
static StandardQuantityDB	instance() Returns an instance of this class.
static void	main(String[] args) Tests this class.

Methods inherited from class visad.data.netcdf.QuantityDBImpl

add, add, get, get, nameIterator, quantityIterator

Methods inherited from class visad.data.netcdf.QuantityDB

add, get

Methods inherited from class java.lang.Object

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

Method Detail

instance

public static StandardQuantityDB instance()

Returns an instance of this class.

Throws:

VisADException - Couldn't instantiate.

add

public QuantityDB add(String[] definitions,
                      String[] aliases)
               throws ParseException,
                      TypeException,
                      VisADException

Adds the given quantities and aliases to the database.

Overrides:

add in class QuantityDBImpl

Parameters:

definitions - New quantities and their definitions. definitions[2*i] contains the name (e.g. "speed") of the quantity whose preferred unit specification (e.g. "m/s") is in definitions[2*i+1].

aliases - Aliases for quantities. aliases[2*i] contains the alias for the quantity named in aliases[2*i+1].

Returns:

The database resulting from the addition. Will not be the original object.

Throws:

ParseException - A unit specification couldn't be parsed.

TypeException - An incompatible version of the quantity already exists.

VisADException - Couldn't create necessary VisAD object.

add

public void add(String name,
                String unitSpec)

Adds a quantity to the database given a name and a display unit specification.

Overrides:

add in class QuantityDBImpl

Parameters:

name - The name of the quantity (e.g. "length").

unitSpec - The preferred display unit for the quantity (e.g. "feet").

Throws:

UnsupportedOperationException - Always thrown because a standard database must be unmodifiable.

main

public static void main(String[] args)
                 throws Exception

Tests this class. If the only argument is "list", then this method will print the list of standard quantities -- one per line -- in the following format: name "(" CannonicalName ")" " in " PreferredUnit e.g. VolumicElectricCharge (ElectricChargeDensity) in C/m3

Throws:

Exception