org.geotools.referencing.factory.epsg
Class ThreadedHsqlEpsgFactory
Object
AbstractFactory
ReferencingFactory
AbstractAuthorityFactory
BufferedAuthorityFactory
DeferredAuthorityFactory
ThreadedEpsgFactory
ThreadedHsqlEpsgFactory
- All Implemented Interfaces:
- RegisterableService, BufferedFactory, Factory, OptionalFactory, AuthorityFactory, CRSAuthorityFactory, CSAuthorityFactory, DatumAuthorityFactory, CoordinateOperationAuthorityFactory
public class ThreadedHsqlEpsgFactory
- extends ThreadedEpsgFactory
Connection to the EPSG database in HSQL database engine format using JDBC. The EPSG
database can be downloaded from http://www.epsg.org.
The SQL scripts (modified for the HSQL syntax as explained
here) are bundled into this plugin. The database version is given in the
edition attribute
of the authority.
The HSQL database is read only.
Implementation note
The SQL scripts are executed the first time a connection is required. The database
is then created as cached tables (HSQL.properties
and HSQL.data
files)
in a temporary directory. Future connections to the EPSG database while reuse the cached
tables, if available. Otherwise, the scripts will be executed again in order to recreate
them.
If the EPSG database should be created in a different directory (or already exists in that
directory), it may be specified as a system property
nammed "EPSG-HSQL.directory".
- Since:
- 2.4
- Author:
- Martin Desruisseaux, Didier Richard
- Module:
modules/plugin/epsg-hsql (gt-epsg-hsql.jar)
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 |
VERSION
public static final Version VERSION
- Current version of EPSG-HSQL plugin. This is usually the same version number than the
one in the EPSG database bundled in this plugin. However this field may contains
additional minor version number if there is some changes related to the EPSG-HSQL
plugin rather then the EPSG database itself (for example additional database index).
DIRECTORY_KEY
public static final String DIRECTORY_KEY
- The key for fetching the database directory from system properties.
- See Also:
- Constant Field Values
DATABASE_NAME
public static final String DATABASE_NAME
- The database name.
- See Also:
- Constant Field Values
ThreadedHsqlEpsgFactory
public ThreadedHsqlEpsgFactory()
- Creates a new instance of this factory. If the "EPSG-HSQL.directory"
system property is defined and contains
the name of a directory with a valid parent, then the
"EPSG" database will be saved in that directory. Otherwise, a
temporary directory will be used.
ThreadedHsqlEpsgFactory
public ThreadedHsqlEpsgFactory(Hints hints)
- Creates a new instance of this data source using the specified hints. The priority
is set to a lower value than the FactoryOnAccess's one in order to give
precedence to the Access-backed database, if presents. Priorities are set that way
because:
- The MS-Access format is the primary EPSG database format.
- If a user downloads the MS-Access database himself, he probably wants to use it.
createDataSource
protected DataSource createDataSource()
throws SQLException
- Returns a data source for the HSQL database.
- Overrides:
createDataSource
in class ThreadedEpsgFactory
- Returns:
- The EPSG data source, or
null
if none where found.
- Throws:
SQLException
- if an error occured while creating the data source.
createBackingStore
protected AbstractAuthorityFactory createBackingStore(Hints hints)
throws SQLException
- Returns the backing-store factory for HSQL syntax. If the cached tables are not available,
they will be created now from the SQL scripts bundled in this plugin.
- Overrides:
createBackingStore
in class ThreadedEpsgFactory
- Parameters:
hints
- A map of hints, including the low-level factories to use for CRS creation.
- Returns:
- The EPSG factory using HSQL syntax.
- Throws:
SQLException
- if connection to the database failed.
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