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:

GeoAPI 1.0

Method Summary

Modifier and Type	Method and Description
IdentifiedObject	createObject(java.lang.String code) Returns an arbitrary object from a code.
Citation	getAuthority() Returns the organization or party responsible for definition and maintenance of the database.
java.util.Set<java.lang.String>	getAuthorityCodes(java.lang.Class type) Returns the set of authority codes of the given type.
InternationalString	getDescriptionText(java.lang.String code) Gets a description of the object corresponding to a code.

Methods inherited from interface org.opengis.referencing.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.

getAuthorityCodes

@Extension
java.util.Set<java.lang.String> getAuthorityCodes(java.lang.Class type)
                                                      throws FactoryException

Returns the set of authority codes of the given type. The type argument specify the base class. For example if this factory is an instance of CRSAuthorityFactory, then:

• CoordinateReferenceSystem.class asks for all authority codes accepted by one of createGeographicCRS, createProjectedCRS, createVerticalCRS, createTemporalCRS and their friends.
• ProjectedCRS.class asks only for authority codes accepted by createProjectedCRS.

Parameters:

type - The spatial reference objects type (may be Object.class).

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.

getDescriptionText

@UML(identifier="descriptionText",
     specification=OGC_01009)
InternationalString getDescriptionText(java.lang.String code)
                                                                                                 throws 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

@Extension
IdentifiedObject createObject(java.lang.String code)
                                  throws 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.

Throws:

NoSuchAuthorityCodeException - if the specified code was not found.

FactoryException - if the object creation failed for some other reason.

See Also:

DatumAuthorityFactory.createDatum(java.lang.String), CRSAuthorityFactory.createCoordinateReferenceSystem(java.lang.String)