org.deegree.io.datastore.sql.generic
Class GenericSQLDatastore

java.lang.Object
  org.deegree.io.datastore.Datastore
      org.deegree.io.datastore.sql.AbstractSQLDatastore
          org.deegree.io.datastore.sql.generic.GenericSQLDatastore

public class GenericSQLDatastore
extends AbstractSQLDatastore

Datastore implementation for any SQL database that can be accessed through a jdbc connection (even the odbc-jdbc bridge is supported) and that supports the storing of BLOBs.

The spatial information is assumed to be stored in a BLOB field as a serialized deegree geometry. It also will be assumed that a spatial index exists and that it has been created using deegree's quadtree api.

Version:

$Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $

Author:

Andreas Poth, last edited by: $Author: mschneider $

See Also:

org.deegree.io.quadtree

Field Summary

Fields inherited from class org.deegree.io.datastore.sql.AbstractSQLDatastore

pool, SRS_UNDEFINED

Constructor Summary

GenericSQLDatastore()

Method Summary

Geometry	convertDBToDeegreeGeometry(Object value, CoordinateSystem targetCS, Connection conn) Converts a database specific geometry Object from the ResultSet to a deegree Geometry.
Object	convertDeegreeToDBGeometry(Geometry geometry, int nativeSRSCode, Connection conn) Converts a deegree Geometry to a database specific geometry Object.
protected GenericSQLTransaction	createTransaction() Creates a new SQLTransaction that provides transactional access.
WhereBuilder	getWhereBuilder(MappedFeatureType[] rootFts, String[] aliases, Filter filter, SortProperty[] sortProperties, TableAliasGenerator aliasGenerator, VirtualContentProvider vcProvider) Overwrite this to return a database specific (spatial capable) WhereBuilder implementation.
protected FeatureCollection	performQuery(Query query, MappedFeatureType[] rootFts, Connection conn) Performs a Query against the datastore.

Methods inherited from class org.deegree.io.datastore.sql.AbstractSQLDatastore

acquireConnection, acquireTransaction, appendGeometryColumnGet, buildSRSTransformCall, buildSRSTransformCall, close, configure, convertFromDBType, determineFidsToLock, getAnnotationParser, getMaxValue, getNativeSRSCode, getSequenceCurrValPlusOffset, getSequenceNextVal, performQuery, performQuery, prepareStatement, releaseConnection, releaseTransaction

Methods inherited from class org.deegree.io.datastore.Datastore

bindSchema, canTransformTo, getConfiguration, getFeatureType, getSchemas, transformQuery, transformResult

Methods inherited from class java.lang.Object

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

Constructor Detail

GenericSQLDatastore

public GenericSQLDatastore()

Method Detail

getWhereBuilder

public WhereBuilder getWhereBuilder(MappedFeatureType[] rootFts,
                                    String[] aliases,
                                    Filter filter,
                                    SortProperty[] sortProperties,
                                    TableAliasGenerator aliasGenerator,
                                    VirtualContentProvider vcProvider)
                             throws DatastoreException

Description copied from class: AbstractSQLDatastore

Overwrite this to return a database specific (spatial capable) WhereBuilder implementation.

Overrides:

getWhereBuilder in class AbstractSQLDatastore

Parameters:

rootFts - involved (requested) feature types

aliases - aliases for the feature types, may be null

filter - filter that restricts the matched features

sortProperties - sort criteria for the result, may be null or empty

aliasGenerator - used to generate unique table aliases

Returns:

WhereBuilder implementation suitable for this datastore

Throws:

DatastoreException

performQuery

protected FeatureCollection performQuery(Query query,
                                         MappedFeatureType[] rootFts,
                                         Connection conn)
                                  throws DatastoreException

Description copied from class: AbstractSQLDatastore

Performs a Query against the datastore.

Note that this method is responsible for the coordinate system tranformation of the input Query and the output FeatureCollection.

Overrides:

performQuery in class AbstractSQLDatastore

Parameters:

query - query to be performed

rootFts - the root feature types that are queried, more than one type means that the types are joined

conn - JDBC connection to use

Returns:

requested feature instances

Throws:

DatastoreException

convertDBToDeegreeGeometry

public Geometry convertDBToDeegreeGeometry(Object value,
                                           CoordinateSystem targetCS,
                                           Connection conn)
                                    throws SQLException

Description copied from class: AbstractSQLDatastore

Converts a database specific geometry Object from the ResultSet to a deegree Geometry.

Specified by:

convertDBToDeegreeGeometry in class AbstractSQLDatastore

Returns:

corresponding deegree geometry

Throws:

SQLException

convertDeegreeToDBGeometry

public Object convertDeegreeToDBGeometry(Geometry geometry,
                                         int nativeSRSCode,
                                         Connection conn)
                                  throws DatastoreException

Description copied from class: AbstractSQLDatastore

Converts a deegree Geometry to a database specific geometry Object.

Specified by:

convertDeegreeToDBGeometry in class AbstractSQLDatastore

Returns:

corresponding database specific geometry object

Throws:

DatastoreException

createTransaction

protected GenericSQLTransaction createTransaction()
                                           throws DatastoreException

Description copied from class: AbstractSQLDatastore

Creates a new SQLTransaction that provides transactional access.

Overrides:

createTransaction in class AbstractSQLDatastore

Returns:

new SQLTransaction instance

Throws:

DatastoreException