Java Doc for AbstractDataStoreFactory.java in  » GIS » GeoTools-2.4.1 » org » geotools » data » Java Source Code / Java DocumentationJava Source Code and Java Documentation

Will also allow me to mess with the interface API without breaking every last DataStoreFactorySpi out there.

The default implementations often hinge around the use of getParameterInfo and the correct use of Param by your subclass.

You still have to implement a few methods:

 public DataSourceMetadataEnity createMetadata( Map params ) throws IOException {
 String host = (String) HOST.lookUp(params);
 String user = (String) USER.lookUp(params);
 Integer port = (Integer) PORT.lookUp(params);
 String database = (String) DATABASE.lookUp(params);
 String description = "Connection to "+getDisplayName()+" on "+host+" as "+user ;
 return new DataSourceMetadataEnity( host+":"+port, database, description );
 }

It will ensure that:

• params is not null
• Everything is of the correct type (or upcovertable to the correct type without Error)
• Required Parameters are present

Why would you ever want to override this method? If you want to check that a expected file exists and is a directory.

 public boolean canProcess( Map params ) {
 if( !super.canProcess( params ) ){
 return false; // was not in agreement with getParametersInfo
 }
 // example check
 File file = (File) DIRECTORY.lookup( params ); // DIRECTORY is a param
 return file.exists() && file.isDirectory();
 }
 

Will return Foo for org.geotools.data.foo.FooFactory.