Package org.geotools.process.function

Class ProcessFunctionFactory

Object

ProcessFunctionFactory

All Implemented Interfaces:

FunctionFactory

public class ProcessFunctionFactory
extends Object
implements FunctionFactory

A bridge between the process world and the filter function world: any process returning a single value can be seen as a filter function

Author:

Andrea Aime - GeoSolutions

Field Summary

Fields

Modifier and Type	Field	Description
static String	PRIMARY_OUTPUT	Parameter used to indicate a certain output is the primary one for the process

Constructor Summary

Constructors

Constructor	Description
ProcessFunctionFactory()

Method Summary

Modifier and Type	Method	Description
void	clear()	Clears the caches forcing the system to do another lookup
Function	function(String name, List<Expression> args, Literal fallback)	Returns a function with the specified name.
Function	function(Name processName, List<Expression> args, 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

Field Detail

PRIMARY_OUTPUT

public static final String PRIMARY_OUTPUT

Parameter used to indicate a certain output is the primary one for the process

See Also:

Constant Field Values

Constructor Detail

ProcessFunctionFactory

public ProcessFunctionFactory()

Method Detail

function

public Function function(String name,
                         List<Expression> args,
                         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

args - 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 processName,
                         List<Expression> args,
                         Literal fallback)

Description copied from interface: FunctionFactory

Returns a function with the specified name.

Specified by:

function in interface FunctionFactory

Parameters:

processName - The name of the function

args - 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.

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.

clear

public void clear()

Clears the caches forcing the system to do another lookup