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java.lang.Objectorg.geotools.data.vpf.VPFDataStoreFactory
public class VPFDataStoreFactory
Class VPFDataSourceFactory.java is responsible for constructing appropriate VPFDataStore (actually VPFLibrary) objects. VPFDataStoreFactory - factory for VPFLibrary - factory for VPFCoverage - factory for VPFFeatureClass - implements FeatureType by delegation to contained DefaultFeatureType - contains VPFFiles - retrieves VPFColumns from VPFFiles for use in constructing DefaultFeatureType - contains joins (column pairs) - factory for VPFFeatureType - implements FeatureType by delegation to contained VPFFeatureClass VPFFile - contains VPFInputStream - factory for VPFColumn - implements AttributeType by delegation to contained DefaultFeatureType
Created: Fri Mar 28 15:54:32 2003
Nested Class Summary |
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Nested classes/interfaces inherited from interface org.geotools.data.DataAccessFactory |
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DataAccessFactory.Param |
Field Summary | |
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static DataAccessFactory.Param |
DIR
A parameter which is the directory containing the LHT file |
protected static java.util.logging.Logger |
LOGGER
The logger for the vpf module. |
static DataAccessFactory.Param |
NAMESPACEP
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Constructor Summary | |
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VPFDataStoreFactory()
Default Constructor |
Method Summary | |
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boolean |
canProcess(java.util.Map params)
Test to see if this factory is suitable for processing the data pointed to by the params map. |
DataStore |
createDataStore(java.util.Map params)
Construct a live data source using the params specifed. |
DataStore |
createNewDataStore(java.util.Map params)
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java.lang.String |
getDescription()
Describe the nature of the datasource constructed by this factory. |
java.lang.String |
getDisplayName()
Name suitable for display to end user. |
java.util.Map |
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. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected static final java.util.logging.Logger LOGGER
public static final DataAccessFactory.Param DIR
public static final DataAccessFactory.Param NAMESPACEP
Constructor Detail |
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public VPFDataStoreFactory()
Method Detail |
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public java.lang.String getDisplayName()
DataAccessFactory
A non localized display name for this data store type.
getDisplayName
in interface DataAccessFactory
public java.lang.String getDescription()
DataAccessFactory
A non localized description of this data store type.
getDescription
in interface DataAccessFactory
public boolean canProcess(java.util.Map 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(java.util.Map params) throws java.io.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, mysql
java.io.IOException
- if there were any problems setting up (creating or
connecting) the datasource.public DataStore createNewDataStore(java.util.Map params) throws java.io.IOException
createNewDataStore
in interface DataStoreFactorySpi
java.io.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 java.util.Map getImplementationHints()
getImplementationHints
in interface Factory
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