Package org.geotools.filter.function

Class DefaultFunctionFactory

Object

DefaultFunctionFactory

All Implemented Interfaces:

FunctionFactory

public class DefaultFunctionFactory
extends Object
implements FunctionFactory

Filter function factory that uses the service provider interface (SPI) lookup mechanism to create functions.

DefaultFunctionFactory is responsible for collection FunctionExpression implementations into a FunctionFactory.

Author:

Justin Deoliveira, OpenGeo

Constructor Summary

Constructors

Constructor	Description
DefaultFunctionFactory()

Method Summary

Modifier and Type	Method	Description
Function	function(String name, List<Expression> parameters, Literal fallback)	Returns a function with the specified name.
Function	function(Name name, List<Expression> parameters, Literal fallback)	Returns a function with the specified name.
List<FunctionName>	getFunctionNames()	Returns the list of function names the factory provides.

Methods inherited from class Object

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

Constructor Details

DefaultFunctionFactory

public DefaultFunctionFactory()

Method Details

getFunctionNames

public List<FunctionName> getFunctionNames()

Description copied from interface: FunctionFactory

Returns the list of function names the factory provides.

Specified by:

getFunctionNames in interface FunctionFactory

Returns:

A list of function names, possibly empty, never null.

function

public Function function(String name,
 List<Expression> parameters,
 Literal fallback)

Description copied from interface: FunctionFactory

Returns a function with the specified name.

Specified by:

function in interface FunctionFactory

Parameters:

name - The name of the function

parameters - Variable list of expression arguments for the function.

fallback - A fallback literal to use in cases where the function does not exist or can not be created. This argument may be null.

function

public Function function(Name name,
 List<Expression> parameters,
 Literal fallback)

Description copied from interface: FunctionFactory

Returns a function with the specified name.

Specified by:

function in interface FunctionFactory

Parameters:

name - The name of the function

parameters - Variable list of expression arguments for the function.

fallback - A fallback literal to use in cases where the function does not exist or can not be created. This argument may be null.