org.geotools.referencing.factory.epsg

Class FactoryUsingWKT

Object

AbstractFactory

ReferencingFactory

AbstractAuthorityFactory

BufferedAuthorityFactory

DeferredAuthorityFactory

FactoryUsingWKT

All Implemented Interfaces:

BufferedFactory, Factory, OptionalFactory, RegistrableFactory, AuthorityFactory, CRSAuthorityFactory

Direct Known Subclasses:

EsriExtension, NetCDFCRSAuthorityFactory, UnnamedExtension

public class FactoryUsingWKT
extends DeferredAuthorityFactory
implements CRSAuthorityFactory

Authority factory for Coordinate Reference Systems beyong the one defined in the EPSG database. This factory is used as a fallback when a requested code is not found in the EPSG database, or when there is no connection at all to the EPSG database. The additional CRS are defined as Well Known Text in a property file located by default in the org.geotools.referencing.factory.epsg package, and whose name should be "epsg.properties". If no property file is found, the factory won't be activated. The property file can also be located in a custom directory; See getDefinitionsURL() for more details.

This factory can also be used to provide custom extensions or overrides to a main EPSG factory. In order to provide a custom extension file, override the getDefinitionsURL() method. In order to make the factory be an override, change the default priority by using the two arguments constructor (this factory defaults to ThreadedEpsgFactory.PRIORITY - 10, so it's used as an extension).

Since:

2.1

Author:

Martin Desruisseaux, Jody Garnett, Rueben Schulz, Andrea Aime

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	DEFAULT_PRIORITY Deprecated. We will try to replace the priority mechanism by a better one in a future Geotools version.
static String	FILENAME The default filename to read.

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
	FactoryUsingWKT() Constructs an authority factory using the default set of factories.
	FactoryUsingWKT(Hints userHints) Constructs an authority factory using a set of factories created from the specified hints.
protected	FactoryUsingWKT(Hints userHints, int priority) Constructs an authority factory using the specified hints and priority.

Method Summary

Modifier and Type	Method and Description
protected AbstractAuthorityFactory	createBackingStore() Creates the backing store authority factory.
protected Citation[]	getAuthorities() Returns the set of authorities to use as identifiers for the CRS to be created.
Citation	getAuthority() Returns the authority.
protected URL	getDefinitionsURL() Returns the URL to the property file that contains CRS definitions.
static void	main(String[] args) Prints a list of codes that duplicate the ones provided in the ThreadedEpsgFactory.
protected Set	reportDuplicatedCodes(PrintWriter out) Prints a list of codes that duplicate the ones provided by ThreadedEpsgFactory.
protected Set	reportInstantiationFailures(PrintWriter out) Prints a list of CRS that can't be instantiated.

Methods inherited from class DeferredAuthorityFactory

canDisposeBackingStore, dispose, disposeBackingStore, exit, getBackingStore, isAvailable, isConnected, setTimeout

Methods inherited from class BufferedAuthorityFactory

createCartesianCS, createCompoundCRS, createCoordinateOperation, createCoordinateReferenceSystem, createCoordinateSystem, createCoordinateSystemAxis, createCylindricalCS, createDatum, createDerivedCRS, createEllipsoid, createEllipsoidalCS, createEngineeringCRS, createEngineeringDatum, createExtent, createFromCoordinateReferenceSystemCodes, createGeocentricCRS, createGeodeticDatum, createGeographicCRS, createImageCRS, createImageDatum, createObject, createOperationMethod, createParameterDescriptor, createPolarCS, createPrimeMeridian, createProjectedCRS, createSphericalCS, createTemporalCRS, createTemporalDatum, createTimeCS, createUnit, createVerticalCRS, createVerticalCS, createVerticalDatum, getAuthorityCodes, getBackingStoreDescription, getDescriptionText, getIdentifiedObjectFinder, getVendor

Methods inherited from class AbstractAuthorityFactory

noSuchAuthorityCode, trimAuthority

Methods inherited from class ReferencingFactory

ensureNonNull

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 CRSAuthorityFactory

createCompoundCRS, createCoordinateReferenceSystem, createDerivedCRS, createEngineeringCRS, createGeocentricCRS, createGeographicCRS, createImageCRS, createProjectedCRS, createTemporalCRS, createVerticalCRS

Methods inherited from interface AuthorityFactory

createObject, getAuthorityCodes, getDescriptionText

Methods inherited from interface Factory

getVendor

Methods inherited from interface Factory

getImplementationHints

Field Detail

FILENAME

public static final String FILENAME

The default filename to read. The default FactoryUsingWKT implementation will search for the first occurence of this file in the following places:

• In the directory specified by the system property.
• In every org/geotools/referencing/factory/espg directories found on the classpath.

The filename part before the extension ("epsg") denotes the authority namespace where to register the content of this file. The user-directory given by the system property may contains other property files for other authorities, like "esri.properties", but those additional authorities are not handled by the default FactoryUsingWKT class.

See Also:

getDefinitionsURL(), Constant Field Values

DEFAULT_PRIORITY

protected static final int DEFAULT_PRIORITY

Deprecated. We will try to replace the priority mechanism by a better one in a future Geotools version.

Default priority for this factory.

Since:

2.4

See Also:

Constant Field Values

Constructor Detail

FactoryUsingWKT

public FactoryUsingWKT()

Constructs an authority factory using the default set of factories.

FactoryUsingWKT

public FactoryUsingWKT(Hints userHints)

Constructs an authority factory using a set of factories created from the specified hints. This constructor recognizes the CRS, CS, DATUM and MATH_TRANSFORM FACTORY hints.

FactoryUsingWKT

protected FactoryUsingWKT(Hints userHints,
                          int priority)

Constructs an authority factory using the specified hints and priority.

Method Detail

getAuthority

public Citation getAuthority()

Returns the authority. The default implementation returns the first citation returned by getAuthorities(), with the addition of identifiers from all additional authorities returned by the above method.

Specified by:

getAuthority in interface AuthorityFactory

Overrides:

getAuthority in class BufferedAuthorityFactory

Returns:

The organization reponsible for definition of the database.

See Also:

getAuthorities()

getAuthorities

protected Citation[] getAuthorities()

Returns the set of authorities to use as identifiers for the CRS to be created. This set is given to the properties-backed factory constructor.

The default implementation returns a singleton containing only EPSG. Subclasses should override this method in order to enumerate all relevant authorities, with EPSG in last position. For example EsriExtension returns {ESRI, EPSG}.

Since:

2.4

getDefinitionsURL

protected URL getDefinitionsURL()

Returns the URL to the property file that contains CRS definitions. The default implementation performs the following search path:

• If a value is set for the system property key, then the "epsg.properties" file will be searched in this directory.
• If no value is set for the above-cited system property, or if no "epsg.properties" file was found in that directory, then the first "epsg.properties" file found in any org/geotools/referencing/factory/epsg directory on the classpath will be used.
• If no file was found on the classpath neither, then this factory will be disabled.

Returns:

The URL, or null if none.

createBackingStore

protected AbstractAuthorityFactory createBackingStore()
                                               throws FactoryException

Creates the backing store authority factory.

Specified by:

createBackingStore in class DeferredAuthorityFactory

Returns:

The backing store to uses in createXXX(...) methods.

Throws:

FactoryNotFoundException - if the no epsg.properties file has been found.

FactoryException - if the constructor failed to find or read the file. This exception usually has an IOException as its cause.

reportDuplicatedCodes

protected Set reportDuplicatedCodes(PrintWriter out)
                             throws FactoryException

Prints a list of codes that duplicate the ones provided by ThreadedEpsgFactory. This is used for implementation of main method in order to check the content of the "epsg.properties" file (or whatever property file used as backing store for this factory) from the command line.

Parameters:

out - The writer where to print the report.

Returns:

The set of duplicated codes.

Throws:

FactoryException - if an error occured.

Since:

2.4

reportInstantiationFailures

protected Set reportInstantiationFailures(PrintWriter out)
                                   throws FactoryException

Prints a list of CRS that can't be instantiated. This is used for implementation of main method in order to check the content of the "epsg.properties" file (or whatever property file used as backing store for this factory) from the command line.

Parameters:

out - The writer where to print the report.

Returns:

The set of codes that can't be instantiated.

Throws:

FactoryException - if an error occured while fetching authority codes.

Since:

2.4

main

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

Prints a list of codes that duplicate the ones provided in the ThreadedEpsgFactory. The factory tested is the one registered in ReferencingFactoryFinder. By default, this is this FactoryUsingWKT class backed by the "epsg.properties" property file. This method can be invoked from the command line in order to check the content of the property file. Valid arguments are:

-test	Try to instantiate all CRS and reports any failure to do so.
-duplicated	List all codes from the WKT factory that are duplicating a code from the SQL factory.

Parameters:

args - Command line arguments.

Throws:

FactoryException - if an error occured.

Since:

2.4