Package org.geotools.api.data

Interface DataStoreFactorySpi

All Superinterfaces:

DataAccessFactory, Factory

All Known Subinterfaces:

FileDataStoreFactorySpi

All Known Implementing Classes:

CSVDataStoreFactory, DB2NGDataStoreFactory, DB2NGJNDIDataStoreFactory, GeoJSONDataStoreFactory, GeoPkgDataStoreFactory, GraticuleDataStoreFactory, H2DataStoreFactory, H2GISDataStoreFactory, H2GISJNDIDataStoreFactory, H2JNDIDataStoreFactory, HanaDataStoreFactory, HanaJNDIDataStoreFactory, InformixDataStoreFactory, InformixJNDIDataStoreFactory, JDBCDataStoreFactory, JDBCJNDIDataStoreFactory, JDTSSQLServerJNDIDataStoreFactory, JniOGRDataStoreFactory, JTDSSqlServerDataStoreFactory, MBTilesDataStoreFactory, MongoDataStoreFactory, MySQLDataStoreFactory, MySQLJNDIDataStoreFactory, NetCDFAuxiliaryStoreFactory, OGRDataStoreFactory, OracleNGDataStoreFactory, OracleNGJNDIDataStoreFactory, OracleNGOCIDataStoreFactory, PostgisNGDataStoreFactory, PostgisNGJNDIDataStoreFactory, PreGeneralizedDataStoreFactory, PropertyDataStoreFactory, ShapefileDataStoreFactory, ShapefileDirectoryFactory, SQLServerDataStoreFactory, SQLServerJNDIDataStoreFactory, STACDataStoreFactory, TeradataDataStoreFactory, TeradataJNDIDataStoreFactory, VectorMosaicStoreFactory, VPFDataStoreFactory, VPFFileFactory, WFSDataStoreFactory

public interface DataStoreFactorySpi
extends DataAccessFactory

Factory used to construct a DataStore from a set of parameters.

The following example shows how a user might connect to a PostGIS database, and maintain the resulting DataStore in a Registry:

 HashMap params = new HashMap();
 params.put("namespace", "leeds");
 params.put("dbtype", "postgis");
 params.put("host","feathers.leeds.ac.uk");
 params.put("port", "5432");
 params.put("database","postgis_test");
 params.put("user","postgis_ro");
 params.put("passwd","postgis_ro");

 DefaultRegistry registry = new DefaultRegistry();
 registry.addDataStore("leeds", params);

 DataStore postgis = registry.getDataStore( "leeds" );
 SimpleFeatureSource = postgis.getFeatureSource( "table" );
 

Implementation Notes

An instance of this interface should exist for all data stores which want to take advantage of the dynamic plug-in system. In addition to implementing this factory interface each DataStore implementation should have a services file:

META-INF/services/org.geotools.api.data.DataStoreFactorySpi

The file should contain a single line which gives the full name of the implementing class.

example:
e.g. org.geotools.data.mytype.MyTypeDataSourceFacotry

The factories are never called directly by client code, instead the DataStoreFinder class is used.

Author:

Jody Garnett, Refractions Research

Nested Class Summary

Nested classes/interfaces inherited from interface DataAccessFactory

DataAccessFactory.Param

Method Summary

Modifier and Type	Method	Description
DataStore	createDataStore(Map<String,?> params)	Construct a live data source using the params specifed.
DataStore	createNewDataStore(Map<String,?> params)

Methods inherited from interface DataAccessFactory

canProcess, getDescription, getDisplayName, getParametersInfo, isAvailable

Methods inherited from interface Factory

getImplementationHints

Method Detail

createDataStore

DataStore createDataStore(Map<String,?> params)
                   throws IOException

Construct a live data source using the params specifed.

You can think of this as setting up a connection to the back end data source.

Magic Params: the following params are magic and are honoured by convention by the GeoServer and uDig application.

• "user": is taken to be the user name
• "passwd": is taken to be the password
• "namespace": is taken to be the namespace prefix (and will be kept in sync with GeoServer namespace management.

When we eventually move over to the use of OpperationalParam we will have to find someway to codify this convention.

Specified by:

createDataStore in interface DataAccessFactory

Parameters:

params - The full set of information needed to construct a live data store. Typical key values for the map include: url - location of a resource, used by file reading datasources. dbtype - the type of the database to connect to, e.g. postgis, mysql

Returns:

The created DataStore, this may be null if the required resource was not found or if insufficent parameters were given. Note that canProcess() should have returned false if the problem is to do with insuficent parameters.

Throws:

IOException - if there were any problems setting up (creating or connecting) the datasource.

createNewDataStore

DataStore createNewDataStore(Map<String,?> params)
                      throws IOException

Throws:

IOException