Package org.postgis

Class DriverWrapper

java.lang.Object

org.postgresql.Driver

org.postgis.DriverWrapper

All Implemented Interfaces:

Driver

Direct Known Subclasses:

DriverWrapperAutoprobe, DriverWrapperLW

public class DriverWrapper
extends org.postgresql.Driver

DriverWrapper Wraps the PostGreSQL Driver to transparently add the PostGIS Object Classes. This avoids the need of explicit addDataType() calls from the driver users side. This method currently works with J2EE DataSource implementations, and with DriverManager framework. Simply replace the "jdbc:postgresql:" with a "jdbc:postgresql_postGIS:" in the jdbc URL. When using the drivermanager, you need to initialize DriverWrapper instead of (or in addition to) org.postgresql.Driver. When using a J2EE DataSource implementation, set the driver class property in the datasource config, the following works for jboss: <driver-class>org.postgis.DriverWrapper</driver-class> If you don't like or want to use the DriverWrapper, you have two alternatives, see the README file. Also note that the addDataType() methods known from earlier pgjdbc versions are deprecated in pgjdbc 8.0, see the commented code variants in the addGisTypes() method. This wrapper always uses EWKT as canonical text representation, and thus works against PostGIS 1.x servers as well as 0.x (tested with 0.8, 0.9 and 1.0).

Author:

Markus Schaber <[email protected]>

See Also:

DriverWrapperLW, DriverWrapperAutoprobe

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	DriverWrapper.TypesAdder	Base class for the three typewrapper implementations
protected static class	DriverWrapper.TypesAdder72	addGISTypes for V7.2 pgjdbc
protected static class	DriverWrapper.TypesAdder74	addGISTypes for V7.3 and V7.4 pgjdbc
protected static class	DriverWrapper.TypesAdder80	addGISTypes for V8.0 (and hopefully newer) pgjdbc

Field Summary

Fields

Modifier and Type	Field	Description
protected static Logger	logger	The static logger instance.
static String	POSTGIS_PROTOCOL
static String	POSTGRES_PROTOCOL
static String	REVISION
protected static DriverWrapper.TypesAdder	ta72
protected static DriverWrapper.TypesAdder	ta74
protected static DriverWrapper.TypesAdder	ta80
protected DriverWrapper.TypesAdder	typesAdder

Constructor Summary

Constructors

Constructor	Description
DriverWrapper()	Default constructor.

Method Summary

Modifier and Type	Method	Description
boolean	acceptsURL(String url)	Check whether the driver thinks he can handle the given URL.
static void	addGISTypes(org.postgresql.PGConnection pgconn)	adds the JTS/PostGIS Data types to a PG 7.3+ Connection.
static void	addGISTypes72(org.postgresql.PGConnection pgconn)	adds the JTS/PostGIS Data types to a PG 7.2 Connection.
static void	addGISTypes80(org.postgresql.PGConnection pgconn)	adds the JTS/PostGIS Data types to a PG 8.0+ Connection.
Connection	connect(String url, Properties info)	Creates a postgresql connection, and then adds the PostGIS data types to it calling addpgtypes().
Logger	getParentLogger()
protected String	getProtoString()
protected static DriverWrapper.TypesAdder	getTypesAdder(org.postgresql.Driver d)
static String	getVersion()	Returns our own CVS version plus postgres Version
protected String	mangleURL(String url)	Mangles the PostGIS URL to return the original PostGreSQL URL
protected boolean	useLW(Connection result)	Do we have HexWKB as well known text representation - to be overridden by subclasses.

Methods inherited from class org.postgresql.Driver

deregister, getMajorVersion, getMinorVersion, getPropertyInfo, getSharedTimer, isRegistered, jdbcCompliant, notImplemented, parseURL, register

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected static final Logger logger

The static logger instance.

POSTGRES_PROTOCOL

public static final String POSTGRES_PROTOCOL

See Also:

Constant Field Values

POSTGIS_PROTOCOL

public static final String POSTGIS_PROTOCOL

See Also:

Constant Field Values

REVISION

public static final String REVISION

See Also:

Constant Field Values

ta72

protected static DriverWrapper.TypesAdder ta72

ta74

protected static DriverWrapper.TypesAdder ta74

ta80

protected static DriverWrapper.TypesAdder ta80

typesAdder

protected DriverWrapper.TypesAdder typesAdder

Constructor Detail

DriverWrapper

public DriverWrapper()
              throws SQLException

Default constructor. This also loads the appropriate TypesAdder for our SQL Driver instance.

Throws:

SQLException - when a SQLException occurs

Method Detail

getTypesAdder

protected static DriverWrapper.TypesAdder getTypesAdder(org.postgresql.Driver d)
                                                 throws SQLException

Throws:

SQLException

connect

public Connection connect(String url,
                          Properties info)
                   throws SQLException

Creates a postgresql connection, and then adds the PostGIS data types to it calling addpgtypes(). A side-effect of this method is that the specified url parameter may be be changed

Specified by:

connect in interface Driver

Overrides:

connect in class org.postgresql.Driver

Parameters:

url - the URL of the database to connect to (may be changed as a side-effect of this method)

info - a list of arbitrary tag/value pairs as connection arguments

Returns:

a connection to the URL or null if it isnt us

Throws:

SQLException - if a database access error occurs

See Also:

Driver.connect(java.lang.String, java.util.Properties), Driver

useLW

protected boolean useLW(Connection result)

Do we have HexWKB as well known text representation - to be overridden by subclasses.

Parameters:

result - Connection to check

Returns:

true if using EWKB, false otherwise

acceptsURL

public boolean acceptsURL(String url)

Check whether the driver thinks he can handle the given URL. A side-effect of this method is that the specified url parameter may be be changed

Specified by:

acceptsURL in interface Driver

Overrides:

acceptsURL in class org.postgresql.Driver

Parameters:

url - the URL of the driver (may be changed as a side-effect of this method)

Returns:

true if this driver accepts the given URL

See Also:

Driver.acceptsURL(java.lang.String)

getVersion

public static String getVersion()

Returns our own CVS version plus postgres Version

Returns:

String value reprenstation of the version

addGISTypes

public static void addGISTypes(org.postgresql.PGConnection pgconn)
                        throws SQLException

adds the JTS/PostGIS Data types to a PG 7.3+ Connection. If you use PostgreSQL jdbc drivers V8.0 or newer, those methods are deprecated due to some class loader problems (but still work for now), and you may want to use the method below instead.

Parameters:

pgconn - The PGConnection object to add the types to

Throws:

SQLException - when a SQLException occurs

addGISTypes80

public static void addGISTypes80(org.postgresql.PGConnection pgconn)
                          throws SQLException

adds the JTS/PostGIS Data types to a PG 8.0+ Connection.

Parameters:

pgconn - The PGConnection object to add the types to

Throws:

SQLException - when a SQLException occurs

addGISTypes72

public static void addGISTypes72(org.postgresql.PGConnection pgconn)
                          throws SQLException

adds the JTS/PostGIS Data types to a PG 7.2 Connection.

Parameters:

pgconn - The PGConnection object to add the types to

Throws:

SQLException - when a SQLException occurs

mangleURL

protected String mangleURL(String url)
                    throws SQLException

Mangles the PostGIS URL to return the original PostGreSQL URL

Parameters:

url - String containing the url to be "mangled"

Returns:

"mangled" string

Throws:

SQLException - when a SQLException occurs

getProtoString

protected String getProtoString()

getParentLogger

public Logger getParentLogger()

Specified by:

getParentLogger in interface Driver

Overrides:

getParentLogger in class org.postgresql.Driver