org.geotools.data.csv

Class CSVFeatureSource

Object

ContentFeatureSource

CSVFeatureSource

All Implemented Interfaces:

FeatureSource<SimpleFeatureType,SimpleFeature>, SimpleFeatureSource

public class CSVFeatureSource
extends ContentFeatureSource

Field Summary

Fields inherited from class ContentFeatureSource

entry, hints, lock, query, queryCapabilities, schema, transaction

Constructor Summary

Constructors

Constructor and Description
CSVFeatureSource(ContentEntry entry)
CSVFeatureSource(ContentEntry entry, Query query)
CSVFeatureSource(CSVDataStore datastore)
CSVFeatureSource(CSVDataStore datastore, Query query)

Method Summary

Modifier and Type	Method and Description
protected SimpleFeatureType	buildFeatureType() Creates the feature type or schema for the feature source.
protected ReferencedEnvelope	getBoundsInternal(Query query) Calculates the bounds of a specified query.
protected int	getCountInternal(Query query) Calculates the number of features of a specified query.
CSVDataStore	getDataStore() The datastore that this feature source originated from.
protected FeatureReader<SimpleFeatureType,SimpleFeature>	getReaderInternal(Query query) Subclass method for returning a native reader from the datastore.

Methods inherited from class ContentFeatureSource

accepts, addFeatureListener, addHints, buildQueryCapabilities, canEvent, canFilter, canLimit, canLock, canOffset, canReproject, canRetype, canSort, canTransact, doLockInternal, doUnlockInternal, getAbsoluteSchema, getBounds, getBounds, getCount, getEntry, getFeatures, getFeatures, getFeatures, getInfo, getName, getQueryCapabilities, getReader, getReader, getReader, getSchema, getState, getSupportedHints, getTransaction, getView, getView, handleVisitor, isView, joinQuery, lockFeatures, lockFeatures, lockFeatures, processLock, removeFeatureListener, resolvePropertyNames, resolvePropertyNames, setFeatureLock, setTransaction, unLockFeatures, unLockFeatures, unLockFeatures

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CSVFeatureSource

public CSVFeatureSource(CSVDataStore datastore)

CSVFeatureSource

public CSVFeatureSource(CSVDataStore datastore,
                        Query query)

CSVFeatureSource

public CSVFeatureSource(ContentEntry entry)

CSVFeatureSource

public CSVFeatureSource(ContentEntry entry,
                        Query query)

Method Detail

getDataStore

public CSVDataStore getDataStore()

Description copied from class: ContentFeatureSource

The datastore that this feature source originated from.

Subclasses may wish to extend this method in order to type narrow its return type.

Specified by:

getDataStore in interface FeatureSource<SimpleFeatureType,SimpleFeature>

Overrides:

getDataStore in class ContentFeatureSource

Returns:

the data source providing this FeatureSource

getBoundsInternal

protected ReferencedEnvelope getBoundsInternal(Query query)
                                        throws IOException

Description copied from class: ContentFeatureSource

Calculates the bounds of a specified query. Subclasses must implement this method. If the computation is not fast, subclasses can return null.

Specified by:

getBoundsInternal in class ContentFeatureSource

Throws:

IOException

getCountInternal

protected int getCountInternal(Query query)
                        throws IOException

Description copied from class: ContentFeatureSource

Calculates the number of features of a specified query. Subclasses must implement this method. If the computation is not fast, it's possible to return -1.

Specified by:

getCountInternal in class ContentFeatureSource

Throws:

IOException

getReaderInternal

protected FeatureReader<SimpleFeatureType,SimpleFeature> getReaderInternal(Query query)
                                                                    throws IOException

Description copied from class: ContentFeatureSource

Subclass method for returning a native reader from the datastore.

It is important to note that if the native reader intends to handle any of the following natively:

• reprojection
• filtering
• max feature limiting
• sorting
• locking
• transactions

Then it *must* set the corresponding flags to true:

• ContentFeatureSource.canReproject() - handles Query.getCoordinateSystemReproject() internally. Example would be PostGIS using Proj to handle reproejction internally
• ContentFeatureSource.canFilter() - handles Query#getFilter() internally.
• {@link #canLimit()} - handles {@link Query#getMaxFeatures()} and {@link Query#getStartIndex()} internally.
• {@link #canSort()} - handles {@link Query#getSortBy()} natively.
• {@link #canRetype()} - handles {@link Query#getProperties()} natively. Example would be only parsing the properties the user asks for from an XML file
• {@link #canLock()} - handles read-locks natively
• {@link #canTransact()} - handles transactions natively

Specified by:

getReaderInternal in class ContentFeatureSource

Throws:

IOException

buildFeatureType

protected SimpleFeatureType buildFeatureType()
                                      throws IOException

Description copied from class: ContentFeatureSource

Creates the feature type or schema for the feature source.

Implementations should use SimpleFeatureTypeBuilder to build the feature type. Also, the builder should be injected with the feature factory which has been set on the DataStore (see ContentDataStore.getFeatureFactory(). Example:

   SimpleFeatureTypeBuilder b = new SimpleFeatureTypeBuilder();
   b.setFeatureTypeFactory( getDataStore().getFeatureTypeFactory() );

   //build the feature type
   ...
 

Specified by:

buildFeatureType in class ContentFeatureSource

Throws:

IOException