org.opengis.referencing
Interface AuthorityFactory

All Superinterfaces:
Factory
All Known Subinterfaces:
CoordinateOperationAuthorityFactory, CRSAuthorityFactory, CSAuthorityFactory, DatumAuthorityFactory

@UML(identifier="CS_CoordinateSystemAuthorityFactory",
     specification=OGC_01009)
public interface AuthorityFactory
extends Factory

Base interface for all authority factories. An authority is an organization that maintains definitions of authority codes. An authority code is a compact string defined by an authority to reference a particular spatial reference object. For example the European Petroleum Survey Group (EPSG) maintains a database of coordinate systems, and other spatial referencing objects, where each object has a code number ID. For example, the EPSG code for a WGS84 Lat/Lon coordinate system is '4326'.

Since:
1.0

Method Summary
 IdentifiedObject createObject(String code)
          Returns an arbitrary object from a code.
 Citation getAuthority()
          Returns the organization or party responsible for definition and maintenance of the database.
 Set<String> getAuthorityCodes(Class<? extends IdentifiedObject> type)
          Returns the set of authority codes of the given type.
 InternationalString getDescriptionText(String code)
          Gets a description of the object corresponding to a code.
 
Methods inherited from interface Factory
getVendor
 

Method Detail

getAuthority

@UML(identifier="getAuthority",
     specification=OGC_01009)
Citation getAuthority()
Returns the organization or party responsible for definition and maintenance of the database.

Returns:
The organization responsible for definition of the database.

getAuthorityCodes

Set<String> getAuthorityCodes(Class<? extends IdentifiedObject> type)
                              throws FactoryException
Returns the set of authority codes of the given type. The type argument specifies the base class. For example if this factory is an instance of CRSAuthorityFactory, then:

Parameters:
type - The spatial reference objects type.
Returns:
The set of authority codes for spatial reference objects of the given type. If this factory doesn't contains any object of the given type, then this method returns an empty set.
Throws:
FactoryException - if access to the underlying database failed.
Departure from OGC/ISO specification:
This method is not part of the OGC specification but has been added as a way to publish the capabilities of a factory.

getDescriptionText

@UML(identifier="descriptionText",
     specification=OGC_01009)
InternationalString getDescriptionText(String code)
                                       throws NoSuchAuthorityCodeException,
                                              FactoryException
Gets a description of the object corresponding to a code.

Parameters:
code - Value allocated by authority.
Returns:
A description of the object, or null if the object corresponding to the specified code has no description.
Throws:
NoSuchAuthorityCodeException - if the specified code was not found.
FactoryException - if the query failed for some other reason.

createObject

IdentifiedObject createObject(String code)
                              throws NoSuchAuthorityCodeException,
                                     FactoryException
Returns an arbitrary object from a code. The returned object will typically be an instance of Datum, CoordinateSystem, ReferenceSystem or CoordinateOperation. If the type of the object is know at compile time, it is recommended to invoke the most precise method instead of this one (for example  createCoordinateReferenceSystem(code)  instead of  createObject(code)  if the caller know he is asking for a coordinate reference system).

Parameters:
code - Value allocated by authority.
Returns:
The object for the given code.
Throws:
NoSuchAuthorityCodeException - if the specified code was not found.
FactoryException - if the object creation failed for some other reason.
See Also:
DatumAuthorityFactory.createDatum(String), CRSAuthorityFactory.createCoordinateReferenceSystem(String)
Departure from OGC/ISO specification:
This method is not part of the OGC specification. It has been added to leverage the capability of factories that can automatically determine the type of the requested object at runtime.


Copyright © 1994-2011 Open Geospatial Consortium. All Rights Reserved.