org.geotools.referencing.factory

Class CachedCRSAuthorityDecorator

Object

AbstractFactory

ReferencingFactory

AbstractAuthorityFactory

CachedCRSAuthorityDecorator

All Implemented Interfaces:

BufferedFactory, Factory, RegistrableFactory, AuthorityFactory, CRSAuthorityFactory

public final class CachedCRSAuthorityDecorator
extends AbstractAuthorityFactory
implements AuthorityFactory, CRSAuthorityFactory, BufferedFactory

An authority factory that caches all objects created by the delegate CRSAuthorityFactory. The behaviour of the createFoo(String) methods first looks if a previously created object exists for the given code. If such an object exists, it is returned directly. The testing of the cache is synchronized and may block if the referencing object is under construction.

If the object is not yet created, the definition is delegated to the appropriate the AuthorityFactory authority factory and the result is cached for next time.

This object is responsible for owning a {{ReferencingObjectCache}}; there are several implementations to choose from on construction.

Since:

2.4

Author:

Jody Garnett

Field Summary

Fields inherited from class ReferencingFactory

LOGGER

Fields inherited from class AbstractFactory

hints, MAXIMUM_PRIORITY, MINIMUM_PRIORITY, NORMAL_PRIORITY, priority

Constructor Summary

Constructors

Modifier	Constructor and Description
	CachedCRSAuthorityDecorator(CRSAuthorityFactory factory) Constructs an instance wrapping the specified factory with a default cache.
protected	CachedCRSAuthorityDecorator(CRSAuthorityFactory factory, ObjectCache cache) Constructs an instance wrapping the specified factory.

Method Summary

Modifier and Type	Method and Description
protected static ObjectCache	createCache(Hints hints) Utility method used to produce cache based on hint
CompoundCRS	createCompoundCRS(String code) Creates a 3D coordinate reference system from a code.
CoordinateReferenceSystem	createCoordinateReferenceSystem(String code) Returns an arbitrary coordinate reference system from a code.
DerivedCRS	createDerivedCRS(String code) Creates a derived coordinate reference system from a code.
EngineeringCRS	createEngineeringCRS(String code) Creates a engineering coordinate reference system from a code.
GeocentricCRS	createGeocentricCRS(String code) Returns a geocentric coordinate reference system from a code.
GeographicCRS	createGeographicCRS(String code) Returns a geographic coordinate reference system from a code.
ImageCRS	createImageCRS(String code) Creates a image coordinate reference system from a code.
IdentifiedObject	createObject(String code) Returns an arbitrary object from a code.
ProjectedCRS	createProjectedCRS(String code) Returns a projected coordinate reference system from a code.
TemporalCRS	createTemporalCRS(String code) Creates a temporal coordinate reference system from a code.
VerticalCRS	createVerticalCRS(String code) Creates a vertical coordinate reference system from a code.
void	dispose() Releases resources immediately instead of waiting for the garbage collector.
Citation	getAuthority() Returns the organization or party responsible for definition and maintenance of the database.
Set	getAuthorityCodes(Class type) Returns the set of authority codes of the given type.
String	getBackingStoreDescription() Returns a description of the underlying backing store, or null if unknown.
InternationalString	getDescriptionText(String code) Gets a description of the object corresponding to a code.
IdentifiedObjectFinder	getIdentifiedObjectFinder(Class type) Returns a finder which can be used for looking up unidentified objects.
protected String	toKey(String code)

Methods inherited from class AbstractAuthorityFactory

createCartesianCS, createCoordinateOperation, createCoordinateSystem, createCoordinateSystemAxis, createCylindricalCS, createDatum, createEllipsoid, createEllipsoidalCS, createEngineeringDatum, createExtent, createFromCoordinateReferenceSystemCodes, createGeodeticDatum, createImageDatum, createOperationMethod, createParameterDescriptor, createPolarCS, createPrimeMeridian, createSphericalCS, createTemporalDatum, createTimeCS, createUnit, createVerticalCS, createVerticalDatum, noSuchAuthorityCode, trimAuthority

Methods inherited from class ReferencingFactory

ensureNonNull, getVendor

Methods inherited from class AbstractFactory

addImplementationHints, equals, getImplementationHints, getPriority, hashCode, onDeregistration, onRegistration, toString

Methods inherited from class Object

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

Methods inherited from interface Factory

getVendor

Methods inherited from interface Factory

getImplementationHints

Constructor Detail

CachedCRSAuthorityDecorator

public CachedCRSAuthorityDecorator(CRSAuthorityFactory factory)

Constructs an instance wrapping the specified factory with a default cache.

The provided authority factory must implement DatumAuthorityFactory, CSAuthorityFactory, CRSAuthorityFactory and CoordinateOperationAuthorityFactory .

Parameters:

factory - The factory to cache. Can not be null.

CachedCRSAuthorityDecorator

protected CachedCRSAuthorityDecorator(CRSAuthorityFactory factory,
                                      ObjectCache cache)

Constructs an instance wrapping the specified factory. The maxStrongReferences argument specify the maximum number of objects to keep by strong reference. If a greater amount of objects are created, then the strong references for the oldest ones are replaced by weak references.

This constructor is protected because subclasses must declare which of the DatumAuthorityFactory, CSAuthorityFactory, CRSAuthorityFactory SearchableAuthorityFactory and CoordinateOperationAuthorityFactory interfaces they choose to implement.

Parameters:

factory - The factory to cache. Can not be null.

maxStrongReferences - The maximum number of objects to keep by strong reference.

Method Detail

createCache

protected static ObjectCache createCache(Hints hints)
                                  throws FactoryRegistryException

Utility method used to produce cache based on hint

Throws:

FactoryRegistryException

toKey

protected String toKey(String code)

createObject

public IdentifiedObject createObject(String code)
                              throws FactoryException

Description copied from class: AbstractAuthorityFactory

Returns an arbitrary object from a code. The returned object will typically be an instance of Datum, CoordinateSystem, CoordinateReferenceSystem or CoordinateOperation. The default implementation always throw an exception. Subclasses should override this method if they are capable to automatically detect the object type from its code.

Specified by:

createObject in interface AuthorityFactory

Overrides:

createObject in class AbstractAuthorityFactory

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:

AbstractAuthorityFactory.createCoordinateReferenceSystem(java.lang.String), AbstractAuthorityFactory.createDatum(java.lang.String), AbstractAuthorityFactory.createEllipsoid(java.lang.String), AbstractAuthorityFactory.createUnit(java.lang.String)

getAuthority

public Citation getAuthority()

Description copied from class: AbstractAuthorityFactory

Returns the organization or party responsible for definition and maintenance of the database.

Specified by:

getAuthority in interface AuthorityFactory

Specified by:

getAuthority in class AbstractAuthorityFactory

Returns:

The organization reponsible for definition of the database.

getAuthorityCodes

public Set getAuthorityCodes(Class type)
                      throws FactoryException

Description copied from interface: AuthorityFactory

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.

Specified by:

getAuthorityCodes in interface AuthorityFactory

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.

getDescriptionText

public InternationalString getDescriptionText(String code)
                                       throws FactoryException

Description copied from interface: AuthorityFactory

Gets a description of the object corresponding to a code.

Specified by:

getDescriptionText in interface AuthorityFactory

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.

createCompoundCRS

public CompoundCRS createCompoundCRS(String code)
                              throws FactoryException

Description copied from class: AbstractAuthorityFactory

Creates a 3D coordinate reference system from a code.

Specified by:

createCompoundCRS in interface CRSAuthorityFactory

Overrides:

createCompoundCRS in class AbstractAuthorityFactory

Parameters:

code - Value allocated by authority.

Returns:

The coordinate reference system for the given code.

Throws:

NoSuchAuthorityCodeException - if the specified code was not found.

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

createCoordinateReferenceSystem

public CoordinateReferenceSystem createCoordinateReferenceSystem(String code)
                                                          throws FactoryException

Description copied from class: AbstractAuthorityFactory

Returns an arbitrary coordinate reference system from a code. If the coordinate reference system type is know at compile time, it is recommended to invoke the most precise method instead of this one (for example createGeographicCRS(code) instead of createCoordinateReferenceSystem(code) if the caller know he is asking for a geographic coordinate reference system).

Specified by:

createCoordinateReferenceSystem in interface CRSAuthorityFactory

Overrides:

createCoordinateReferenceSystem in class AbstractAuthorityFactory

Parameters:

code - Value allocated by authority.

Returns:

The coordinate reference system 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:

AbstractAuthorityFactory.createGeographicCRS(java.lang.String), AbstractAuthorityFactory.createProjectedCRS(java.lang.String), AbstractAuthorityFactory.createVerticalCRS(java.lang.String), AbstractAuthorityFactory.createTemporalCRS(java.lang.String), AbstractAuthorityFactory.createCompoundCRS(java.lang.String)

createDerivedCRS

public DerivedCRS createDerivedCRS(String code)
                            throws FactoryException

Description copied from class: AbstractAuthorityFactory

Creates a derived coordinate reference system from a code.

Specified by:

createDerivedCRS in interface CRSAuthorityFactory

Overrides:

createDerivedCRS in class AbstractAuthorityFactory

Parameters:

code - Value allocated by authority.

Returns:

The coordinate reference system for the given code.

Throws:

NoSuchAuthorityCodeException - if the specified code was not found.

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

createEngineeringCRS

public EngineeringCRS createEngineeringCRS(String code)
                                    throws FactoryException

Description copied from class: AbstractAuthorityFactory

Creates a engineering coordinate reference system from a code.

Specified by:

createEngineeringCRS in interface CRSAuthorityFactory

Overrides:

createEngineeringCRS in class AbstractAuthorityFactory

Parameters:

code - Value allocated by authority.

Returns:

The coordinate reference system for the given code.

Throws:

NoSuchAuthorityCodeException - if the specified code was not found.

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

createGeocentricCRS

public GeocentricCRS createGeocentricCRS(String code)
                                  throws FactoryException

Description copied from class: AbstractAuthorityFactory

Returns a geocentric coordinate reference system from a code.

Specified by:

createGeocentricCRS in interface CRSAuthorityFactory

Overrides:

createGeocentricCRS in class AbstractAuthorityFactory

Parameters:

code - Value allocated by authority.

Returns:

The coordinate reference system for the given code.

Throws:

NoSuchAuthorityCodeException - if the specified code was not found.

FactoryException - if the object creation failed.

See Also:

AbstractAuthorityFactory.createGeodeticDatum(java.lang.String)

createGeographicCRS

public GeographicCRS createGeographicCRS(String code)
                                  throws FactoryException

Description copied from class: AbstractAuthorityFactory

Returns a geographic coordinate reference system from a code.

Specified by:

createGeographicCRS in interface CRSAuthorityFactory

Overrides:

createGeographicCRS in class AbstractAuthorityFactory

Parameters:

code - Value allocated by authority.

Returns:

The coordinate reference system 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:

AbstractAuthorityFactory.createGeodeticDatum(java.lang.String)

createImageCRS

public ImageCRS createImageCRS(String code)
                        throws FactoryException

Description copied from class: AbstractAuthorityFactory

Creates a image coordinate reference system from a code.

Specified by:

createImageCRS in interface CRSAuthorityFactory

Overrides:

createImageCRS in class AbstractAuthorityFactory

Parameters:

code - Value allocated by authority.

Returns:

The coordinate reference system for the given code.

Throws:

NoSuchAuthorityCodeException - if the specified code was not found.

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

createProjectedCRS

public ProjectedCRS createProjectedCRS(String code)
                                throws FactoryException

Description copied from class: AbstractAuthorityFactory

Returns a projected coordinate reference system from a code.

Specified by:

createProjectedCRS in interface CRSAuthorityFactory

Overrides:

createProjectedCRS in class AbstractAuthorityFactory

Parameters:

code - Value allocated by authority.

Returns:

The coordinate reference system 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:

AbstractAuthorityFactory.createGeodeticDatum(java.lang.String)

createTemporalCRS

public TemporalCRS createTemporalCRS(String code)
                              throws FactoryException

Description copied from class: AbstractAuthorityFactory

Creates a temporal coordinate reference system from a code.

Specified by:

createTemporalCRS in interface CRSAuthorityFactory

Overrides:

createTemporalCRS in class AbstractAuthorityFactory

Parameters:

code - Value allocated by authority.

Returns:

The coordinate reference system 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:

AbstractAuthorityFactory.createTemporalDatum(java.lang.String)

createVerticalCRS

public VerticalCRS createVerticalCRS(String code)
                              throws FactoryException

Description copied from class: AbstractAuthorityFactory

Creates a vertical coordinate reference system from a code.

Specified by:

createVerticalCRS in interface CRSAuthorityFactory

Overrides:

createVerticalCRS in class AbstractAuthorityFactory

Parameters:

code - Value allocated by authority.

Returns:

The coordinate reference system 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:

AbstractAuthorityFactory.createVerticalDatum(java.lang.String)

dispose

public void dispose()
             throws FactoryException

Description copied from class: AbstractAuthorityFactory

Releases resources immediately instead of waiting for the garbage collector. Once a factory has been disposed, further create(...) invocations may throw a FactoryException. Disposing a previously-disposed factory, however, has no effect.

Overrides:

dispose in class AbstractAuthorityFactory

Throws:

FactoryException - if an error occured while disposing the factory.

getBackingStoreDescription

public String getBackingStoreDescription()
                                  throws FactoryException

Description copied from class: AbstractAuthorityFactory

Returns a description of the underlying backing store, or null if unknown. This is for example the database software used for storing the data. The default implementation returns always null.

Overrides:

getBackingStoreDescription in class AbstractAuthorityFactory

Returns:

The description of the underlying backing store, or null.

Throws:

FactoryException - if a failure occurs while fetching the engine description.

getIdentifiedObjectFinder

public IdentifiedObjectFinder getIdentifiedObjectFinder(Class type)
                                                 throws FactoryException

Returns a finder which can be used for looking up unidentified objects. The default implementation delegates lookup to the underlying backing store and caches the result.

Overrides:

getIdentifiedObjectFinder in class AbstractAuthorityFactory

Parameters:

type - The type of objects to look for. Should be a GeoAPI interface like GeographicCRS.class, but this method accepts also implementation class. If the type is unknown, use IdentifiedObject.class. A more accurate type may help to speed up the search, since it reduces the amount of tables to scan in some implementations like the factories backed by EPSG database.

Returns:

A finder to use for looking up unidentified objects.

Throws:

FactoryException - if the finder can not be created.

Since:

2.4