org.deegree.sqldialect.postgis.function
Class PostGISArea

java.lang.Object
  org.deegree.sqldialect.postgis.function.PostGISArea

All Implemented Interfaces:

SQLFunctionProvider

public class PostGISArea
extends Object
implements SQLFunctionProvider

SQLFunctionProvider for the Area function.

Version:

$Revision: 30337 $, $Date: 2011-04-04 14:21:18 +0200 (Mo, 04. Apr 2011) $

Author:

Markus Schneider, last edited by: $Author: mschneider $

Constructor Summary

PostGISArea()

Method Summary

void	destroy() Called by SQLFunctionManager once when this SQLFunctionProvider is being taken out of service.
Set<ConnectionManager.Type>	getDialects() Returns the supported SQL dialects.
String	getName() Returns the name of the provided function.
void	init(DeegreeWorkspace ws) Called by SQLFunctionManager once when this SQLFunctionProvider is being taken into service.
SQLExpression	toProtoSQL(List<SQLExpression> args, SQLDialect dialect) Translates the given arguments into an an SQL function call.

Methods inherited from class java.lang.Object

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

Constructor Detail

PostGISArea

public PostGISArea()

Method Detail

getName

public String getName()

Description copied from interface: SQLFunctionProvider

Returns the name of the provided function.

Specified by:

getName in interface SQLFunctionProvider

Returns:

name of the provided function, never null

getDialects

public Set<ConnectionManager.Type> getDialects()

Description copied from interface: SQLFunctionProvider

Returns the supported SQL dialects.

Specified by:

getDialects in interface SQLFunctionProvider

Returns:

supported SQL dialects, never null

toProtoSQL

public SQLExpression toProtoSQL(List<SQLExpression> args,
                                SQLDialect dialect)

Description copied from interface: SQLFunctionProvider

Translates the given arguments into an an SQL function call.

Specified by:

toProtoSQL in interface SQLFunctionProvider

Parameters:

args - SQL arguments, can be empty, but never null

dialect - SQL dialect, can be null (TODO shouldn't be)

Returns:

corresponding SQL expression, never null

init

public void init(DeegreeWorkspace ws)
          throws ResourceInitException

Description copied from interface: SQLFunctionProvider

Called by SQLFunctionManager once when this SQLFunctionProvider is being taken into service.

Specified by:

init in interface SQLFunctionProvider

Parameters:

ws - workspace context, never null

Throws:

ResourceInitException - if the initialization fails

destroy

public void destroy()

Description copied from interface: SQLFunctionProvider

Called by SQLFunctionManager once when this SQLFunctionProvider is being taken out of service.

Specified by:

destroy in interface SQLFunctionProvider