Package org.geotools.api.data

Interface FeatureStore<T extends FeatureType,F extends Feature>

All Superinterfaces:

FeatureSource<T,F>

All Known Subinterfaces:

FeatureLocking<T,F>, SimpleFeatureLocking, SimpleFeatureStore

All Known Implementing Classes:

ContentFeatureStore, CSVFeatureStore, DirectoryFeatureLocking, DirectoryFeatureStore, GeoJSONFeatureStore, JDBCFeatureStore, MemoryFeatureStore, MongoFeatureStore, OracleTransformFeatureStore, PostgisTransformFeatureStore, PropertyFeatureStore, SQLServerTransformFeatureStore, TransformFeatureLocking, TransformFeatureStore

public interface FeatureStore<T extends FeatureType,F extends Feature>
extends FeatureSource<T,F>

This interface extends FeatureSource, adding methods to add and remove features and to modify existing features.

 DataStore myDataStore = ...
 FeatureSource featureSource = myDataStore.getFeatureSource("aname");
 if (featureSource instanceof FeatureStore) {
     // we have write access to the feature data
     FeatureStore featureStore = (FeatureStore) featureSource;

     // add some new features
     Transaction t = new DefaultTransaction("add");
     featureStore.setTransaction(t);
     try {
         featureStore.addFeatures( someFeatures );
         t.commit();
     } catch (Exception ex) {
        java.util.logging.Logger.getGlobal().log(java.util.logging.Level.INFO, "", ex);
         t.rollback();
     } finally {
         t.close();
     }
 }
 

Author:

Jody Garnett, Ray Gallagher, Rob Hranac, TOPP, Chris Holmes, TOPP

Method Summary

Modifier and Type	Method	Description
List<FeatureId>	addFeatures(FeatureCollection<T,F> featureCollection)	Adds all features from the feature collection.
Transaction	getTransaction()	Gets the Transaction that this FeatureStore is currently operating against.
void	modifyFeatures(Name[] attributeNames, Object[] attributeValues, Filter filter)	Modifies the attributes with the supplied values in all features selected by the given filter.
void	modifyFeatures(Name attributeName, Object attributeValue, Filter filter)	Modifies an attribute with the supplied value in all features selected by the given filter.
void	removeFeatures(Filter filter)	Removes features selected by the given filter.
void	setFeatures(FeatureReader<T,F> reader)	Deletes any existing features in the data source and then inserts new features provided by the given reader.
void	setTransaction(Transaction transaction)	Provide a transaction for commit/rollback control of a modifying operation on this FeatureStore.

Methods inherited from interface FeatureSource

addFeatureListener, getBounds, getBounds, getCount, getDataStore, getFeatures, getFeatures, getFeatures, getInfo, getName, getQueryCapabilities, getSchema, getSupportedHints, removeFeatureListener

Method Detail

addFeatures

List<FeatureId> addFeatures(FeatureCollection<T,F> featureCollection)
                     throws IOException

Adds all features from the feature collection.

A list of FeatureIds is returned, one for each feature in the order created. However, these might not be assigned until after a commit has been performed.

Parameters:

featureCollection - the collection of features to add

Returns:

the FeatureIds of the newly added features

Throws:

IOException - if an error occurs modifying the data source

removeFeatures

void removeFeatures(Filter filter)
             throws IOException

Removes features selected by the given filter.

Parameters:

filter - an OpenGIS filter

Throws:

IOException - if an error occurs modifying the data source

modifyFeatures

void modifyFeatures(Name[] attributeNames,
                    Object[] attributeValues,
                    Filter filter)
             throws IOException

Modifies the attributes with the supplied values in all features selected by the given filter.

Parameters:

attributeNames - the attributes to modify

attributeValues - the new values for the attributes

filter - an OpenGIS filter

Throws:

IOException - if the attribute and object arrays are not equal in length; if the value types do not match the attribute types; if modification is not supported; or if there errors accessing the data source

modifyFeatures

void modifyFeatures(Name attributeName,
                    Object attributeValue,
                    Filter filter)
             throws IOException

Modifies an attribute with the supplied value in all features selected by the given filter.

Parameters:

attributeName - the attribute to modify

attributeValue - the new value for the attribute

filter - an OpenGIS filter

Throws:

IOException - if modification is not supported; if the value type does not match the attribute type; or if there errors accessing the data source

setFeatures

void setFeatures(FeatureReader<T,F> reader)
          throws IOException

Deletes any existing features in the data source and then inserts new features provided by the given reader. This is primarily used as a convenience method for file-based data sources.

Parameters:

reader - - the collection to be written

Throws:

IOException - if there are any datasource errors.

setTransaction

void setTransaction(Transaction transaction)

Provide a transaction for commit/rollback control of a modifying operation on this FeatureStore.

 Transaction t = new DefaultTransaction();
 featureStore.setTransaction(t);
 try {
     featureStore.addFeatures( someFeatures );
     t.commit();
 } catch ( IOException ex ) {
     // something went wrong;
    java.util.logging.Logger.getGlobal().log(java.util.logging.Level.INFO, "", ex);
     t.rollback();
 } finally {
     t.close();
 }
 

Parameters:

transaction - the transaction

getTransaction

Transaction getTransaction()

Gets the Transaction that this FeatureStore is currently operating against.

 Transaction t = featureStore.getTransaction();
 try {
     featureStore.addFeatures( features );
     t.commit();
 } catch( IOException erp ){
     // something went wrong;
    java.util.logging.Logger.getGlobal().log(java.util.logging.Level.INFO, "", ex);
     t.rollback();
 }
 

Returns:

Transaction in use, or Transaction.AUTO_COMMIT