Class FunctionMapper

java.lang.Object

jakarta.el.FunctionMapper

public abstract class FunctionMapper
extends Object

Abstract base class for mapping EL function names to Java Method objects. During expression evaluation, the EL implementation uses the FunctionMapper to resolve function references of the form prefix:functionName to the corresponding static Java methods. Implementations maintain a registry of function prefixes and names mapped to their underlying methods.

Since:

EL 2.1

Constructor Summary

Constructors

Constructor	Description
FunctionMapper()	Constructs a FunctionMapper.

Method Summary

Modifier and Type	Method	Description
void	mapFunction(String prefix, String localName, Method method)	Map a method to a function name.
abstract Method	resolveFunction(String prefix, String localName)	Resolves a function reference to its corresponding static Method.

Methods inherited from class Object

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

Constructor Details

FunctionMapper

public FunctionMapper()

Constructs a FunctionMapper. Subclasses should invoke this constructor to initialize the base mapper state.

Method Details

resolveFunction

public abstract Method resolveFunction(String prefix,
 String localName)

Resolves a function reference to its corresponding static Method.

Parameters:

prefix - the namespace prefix of the function

localName - the local name of the function

Returns:

the Method object for the resolved function, or null if not found

mapFunction

public void mapFunction(String prefix,
 String localName,
 Method method)

Map a method to a function name.

Parameters:

prefix - Function prefix

localName - Function name

method - Method

Since:

EL 3.0