Package org.geotools.data.ogr

Class OGRDataStoreFactory

Object
OGRDataStoreFactory
All Implemented Interfaces:
DataAccessFactory, DataStoreFactorySpi, Factory
Direct Known Subclasses:
JniOGRDataStoreFactory
public abstract class OGRDataStoreFactory extends Object implements DataStoreFactorySpi
Implementation of the DataStore service provider interface for OGR.
Author:
Andrea Aime, GeoSolution

  • Field Details

    • LOGGER

      protected static Logger LOGGER

    • OGR_NAME

      public static final DataAccessFactory.Param OGR_NAME

    • OGR_DRIVER_NAME

      public static final DataAccessFactory.Param OGR_DRIVER_NAME

    • NAMESPACEP

      public static final DataAccessFactory.Param NAMESPACEP

    • DEFAULT_MAXCONN

      protected static final Integer DEFAULT_MAXCONN

    • MAXCONN

      public static final DataAccessFactory.Param MAXCONN
      Maximum number of connections in the connection pool

    • DEFAULT_MINCONN

      protected static final Integer DEFAULT_MINCONN

    • MINCONN

      public static final DataAccessFactory.Param MINCONN
      Minimum number of connections in the connection pool

    • DEFAULT_MAXWAIT

      protected static final int DEFAULT_MAXWAIT
      See Also:

    • MAXWAIT

      public static final DataAccessFactory.Param MAXWAIT
      Maximum amount of time the pool will wait when trying to grab a new connection *

    • DEFAULT_EVICTABLE_TIME

      protected static final int DEFAULT_EVICTABLE_TIME
      See Also:

    • MIN_EVICTABLE_TIME

      public static final DataAccessFactory.Param MIN_EVICTABLE_TIME
      Min time for a connection to be idle in order to be evicted *

    • DEFAULT_EVICTOR_TESTS_PER_RUN

      public static final int DEFAULT_EVICTOR_TESTS_PER_RUN
      See Also:

    • EVICTOR_TESTS_PER_RUN

      public static final DataAccessFactory.Param EVICTOR_TESTS_PER_RUN
      Number of connections checked during a single evictor run *

    • DEFAULT_PRIME_DATASOURCE

      public static final boolean DEFAULT_PRIME_DATASOURCE
      See Also:

    • PRIME_DATASOURCE

      public static final DataAccessFactory.Param PRIME_DATASOURCE
      Whether to try to initialize a datasource with a full data read before using it*

  • Constructor Details

    • OGRDataStoreFactory

      public OGRDataStoreFactory()

  • Method Details

    • createOGR

      protected abstract OGR createOGR()

    • canProcess

      public boolean canProcess(Map<String,?> params)
      Description copied from interface: DataAccessFactory
      Test to see if this factory is suitable for processing the data pointed to by the params map.

      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.

      Specified by:
      canProcess in interface DataAccessFactory
      Parameters:
      params - The full set of information needed to construct a live data source.
      Returns:
      booean true if and only if this factory can process the resource indicated by the param set and all the required params are pressent.

    • createDataStore

      public DataStore createDataStore(Map<String,?> params) throws IOException
      Description copied from interface: DataStoreFactorySpi
      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
      Specified by:
      createDataStore in interface DataStoreFactorySpi
      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

      public DataStore createNewDataStore(Map<String,?> params) throws IOException
      Not implemented yet.
      Specified by:
      createNewDataStore in interface DataStoreFactorySpi
      Throws:
      IOException

    • getDisplayName

      public String getDisplayName()
      Description copied from interface: DataAccessFactory
      Name suitable for display to end user.

      A non localized display name for this data store type.

      Specified by:
      getDisplayName in interface DataAccessFactory
      Returns:
      A short name suitable for display in a user interface.

    • getDescription

      public String getDescription()
      Describes the type of data the datastore returned by this factory works with.
      Specified by:
      getDescription in interface DataAccessFactory
      Returns:
      String a human readable description of the type of restore supported by this datastore.

    • isAvailable

      public final boolean isAvailable()
      Test to see if this datastore is available, if it has all the appropriate libraries to construct a datastore.
      Specified by:
      isAvailable in interface DataAccessFactory
      Returns:
      true if and only if this factory is available to create DataStores.
      TODO:
      REVISIT: I'm just adding this method to compile, maintainer should revisit to check for any libraries that may be necessary for datastore creations.

    • isAvailable

      public final boolean isAvailable(boolean handleError)
      Performs the available test specifying how to handle errors.

      Specifying true for handleError will cause any exceptions to be caught and logged, and return false

    • doIsAvailable

      protected abstract boolean doIsAvailable() throws Throwable
      Performs the actual test to see if the OGR library and this datastore is available.

      Implementations of this method should not attempt to handle any fatal exceptions.

      Throws:
      Throwable

    • getParametersInfo

      public DataAccessFactory.Param[] getParametersInfo()
      Describe parameters.
      Specified by:
      getParametersInfo in interface DataAccessFactory
      Returns:
      Param array describing the Map for createDataStore
      See Also:

    • canProcess

      public boolean canProcess(String ogrName, String driverName)
      Assume we can process an ogrName if the ogrName exists and can be opened, or if the specified driver does exist.

    • getAvailableDrivers

      public Set<String> getAvailableDrivers()

    • getImplementationHints

      public Map<RenderingHints.Key,?> getImplementationHints()
      Description copied from interface: Factory
      Map of hints (maybe unmodifiable) used by this factory to customize its use. This map is not guaranteed to contains all the hints supplied by the user; it may be only a subset. Consequently, hints provided here are usually not suitable for creating new factories, unless the implementation make some additional garantees.

      The primary purpose of this method is to determine if an existing factory instance can be reused for a set of user-supplied hints. This method is invoked by FactoryRegistry in order to compare this factory's hints against user's hints. This is dependency introspection only; FactoryRegistry never invokes this method for creating new factories.

      Keys are usually static constants from the Hints class, while values are instances of some key-dependent class. The key set must contains at least all hints impacting functionality. While the key set may contains all hints supplied by the user, it is recommended to limit the set to only the hints used by this particular factory instance. A minimal set will helps FactoryRegistry to compare only hints that matter and avoid the creation of unnecessary instances of this factory.

      The hint values may be different than the one supplied by the user. If a user supplied a hint as a Class object, this method shall replace it by the actual instance used, if possible.

      Implementations of this method are usually quite simple. For example if a datum authority factory uses an ordinary datum factory, its method could be implemented as below (note that we should not check if the datum factory is null, since key with null value is the expected behaviour in this case). Example: 

      
 Map hints = new HashMap();
 hints.put(Hints.DATUM_FACTORY, datumFactory);
 return hints;
      Specified by:
      getImplementationHints in interface Factory
      Returns:
      The map of hints, or an {@linkplain java.util.Collections.emptyMap() empty map} if none.