public class VPFDataStoreFactory extends Object implements DataStoreFactorySpi
VPFFile - contains VPFInputStream - factory for VPFColumn - implements AttributeType by delegation to contained DefaultFeatureType
Created: Fri Mar 28 15:54:32 2003
DataAccessFactory.Param
Modifier and Type | Field and Description |
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static DataAccessFactory.Param |
DIR
A parameter which is the directory containing the LHT file
|
static DataAccessFactory.Param |
NAMESPACEP |
Constructor and Description |
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VPFDataStoreFactory()
Default Constructor
|
Modifier and Type | Method and Description |
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boolean |
canProcess(Map<String,?> params)
Test to see if this factory is suitable for processing the data pointed to by the params map.
|
DataStore |
createDataStore(Map<String,?> params)
Construct a live data source using the params specifed.
|
DataStore |
createDataStore(URL url) |
DataStore |
createNewDataStore(Map<String,?> params) |
String |
getDescription()
Describe the nature of the datasource constructed by this factory.
|
String |
getDisplayName()
Name suitable for display to end user.
|
Map<RenderingHints.Key,?> |
getImplementationHints()
Returns the implementation hints.
|
DataAccessFactory.Param[] |
getParametersInfo()
MetaData about the required Parameters (for createDataStore).
|
boolean |
isAvailable()
Test to see if the implementation is available for use.
|
public static final DataAccessFactory.Param DIR
public static final DataAccessFactory.Param NAMESPACEP
public String getDisplayName()
DataAccessFactory
A non localized display name for this data store type.
getDisplayName
in interface DataAccessFactory
public String getDescription()
DataAccessFactory
A non localized description of this data store type.
getDescription
in interface DataAccessFactory
public boolean canProcess(Map<String,?> params)
DataAccessFactory
If this datasource requires a number of parameters then this mehtod should check that they are all present and that they are all valid. If the datasource is a file reading data source then the extentions or mime types of any files specified should be checked. For example, a Shapefile datasource should check that the url param ends with shp, such tests should be case insensative.
canProcess
in interface DataAccessFactory
params
- The full set of information needed to construct a live data source.public DataStore createDataStore(Map<String,?> params) throws IOException
DataStoreFactorySpi
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.
createDataStore
in interface DataAccessFactory
createDataStore
in interface DataStoreFactorySpi
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, mysqlIOException
- if there were any problems setting up (creating or connecting) the
datasource.public DataStore createDataStore(URL url) throws IOException
IOException
public DataStore createNewDataStore(Map<String,?> params) throws IOException
createNewDataStore
in interface DataStoreFactorySpi
IOException
public DataAccessFactory.Param[] getParametersInfo()
DataAccessFactory
Interpretation of FeatureDescriptor values:
This should be the same as:
Object params = factory.getParameters();
BeanInfo info = getBeanInfo( params );
return info.getPropertyDescriptors();
getParametersInfo
in interface DataAccessFactory
public boolean isAvailable()
DataAccessFactory
Most factories will simply return true
as GeoTools will distribute the
appropriate libraries. Though it's not a bad idea for DataStoreFactories to check to make
sure that the libraries are there.
OracleDataStoreFactory is an example of one that may generally return false
,
since GeoTools can not distribute the oracle jars. (they must be added by the client.)
One may ask how this is different than canProcess, and basically available is used by the DataStoreFinder getAvailableDataStore method, so that DataStores that can not even be used do not show up as options in gui applications.
isAvailable
in interface DataAccessFactory
public Map<RenderingHints.Key,?> getImplementationHints()
getImplementationHints
in interface Factory
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