org.geotools.jdbc

Class JDBCJoiningFeatureReader

Object

JDBCFeatureReader

JDBCJoiningFeatureReader

All Implemented Interfaces:

Closeable, AutoCloseable, FeatureReader<SimpleFeatureType,SimpleFeature>

public class JDBCJoiningFeatureReader
extends JDBCFeatureReader

Feature reader that wraps multiple feature readers in a join query.

Author:

Justin Deoliveira, OpenGeo

Nested Class Summary

Nested classes/interfaces inherited from class JDBCFeatureReader

JDBCFeatureReader.ResultSetFeature

Field Summary

Fields inherited from class JDBCFeatureReader

builder, callback, columnNames, cx, dataStore, featureSource, featureType, geometryFactory, hints, LOGGER, md, next, offset, pkey, query, rs, screenMap, st, TRACE_ENABLED, tracer, tx

Constructor Summary

Constructors

Constructor and Description
JDBCJoiningFeatureReader(PreparedStatement st, Connection cx, JDBCFeatureSource featureSource, SimpleFeatureType featureType, JoinInfo join, Query query)
JDBCJoiningFeatureReader(String sql, Connection cx, JDBCFeatureSource featureSource, SimpleFeatureType featureType, JoinInfo join, Query query)

Method Summary

Modifier and Type	Method and Description
void	close() Release the underlying resources associated with this stream.
boolean	hasNext() Query whether this FeatureReader has another Feature.
SimpleFeature	next() Reads the next Feature in the FeatureReader.

Methods inherited from class JDBCFeatureReader

cleanup, ensureNext, ensureOpen, finalize, getFeatureType, getPrimaryKey, getQuery, init, readNextFeature, setNext

Methods inherited from class Object

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

Constructor Detail

JDBCJoiningFeatureReader

public JDBCJoiningFeatureReader(String sql,
                                Connection cx,
                                JDBCFeatureSource featureSource,
                                SimpleFeatureType featureType,
                                JoinInfo join,
                                Query query)
                         throws SQLException,
                                IOException

Throws:

SQLException

IOException

JDBCJoiningFeatureReader

public JDBCJoiningFeatureReader(PreparedStatement st,
                                Connection cx,
                                JDBCFeatureSource featureSource,
                                SimpleFeatureType featureType,
                                JoinInfo join,
                                Query query)
                         throws SQLException,
                                IOException

Throws:

SQLException

IOException

Method Detail

hasNext

public boolean hasNext()
                throws IOException

Description copied from interface: FeatureReader

Query whether this FeatureReader has another Feature.

Specified by:

hasNext in interface FeatureReader<SimpleFeatureType,SimpleFeature>

Overrides:

hasNext in class JDBCFeatureReader

Returns:

True if there are more Features to be read. In other words, true if calls to next would return a feature rather than throwing an exception.

Throws:

IOException - If an error occurs determining if there are more Features.

next

public SimpleFeature next()
                   throws IOException,
                          IllegalArgumentException,
                          NoSuchElementException

Description copied from interface: FeatureReader

Reads the next Feature in the FeatureReader.

Specified by:

next in interface FeatureReader<SimpleFeatureType,SimpleFeature>

Overrides:

next in class JDBCFeatureReader

Returns:

The next feature in the reader.

Throws:

IOException - If an error occurs reading the Feature.

NoSuchElementException - If there are no more Features in the Reader.

IllegalArgumentException

close

public void close()
           throws IOException

Description copied from interface: FeatureReader

Release the underlying resources associated with this stream.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in interface FeatureReader<SimpleFeatureType,SimpleFeature>

Overrides:

close in class JDBCFeatureReader

Throws:

IOException - if an I/O error occurs