Package jakarta.el

Class VariableMapper

java.lang.Object

jakarta.el.VariableMapper

public abstract class VariableMapper
extends Object

The interface to a map between Jakarta Expression Language variables and the Jakarta Expression Language expressions they are associated with.

Since:

Jakarta Server Pages 2.1

Constructor Summary

Constructors

Constructor	Description
VariableMapper()

Method Summary

Modifier and Type	Method	Description
abstract ValueExpression	resolveVariable(String variable)
abstract ValueExpression	setVariable(String variable, ValueExpression expression)	Assign a ValueExpression to an Jakarta Expression Language variable, replacing any previously assignment to the same variable.

Methods inherited from class java.lang.Object

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

Constructor Detail

VariableMapper

public VariableMapper()

Method Detail

resolveVariable

public abstract ValueExpression resolveVariable(String variable)

Parameters:

variable - The variable name

Returns:

the ValueExpression assigned to the variable, null if there is no previous assignment to this variable.

setVariable

public abstract ValueExpression setVariable(String variable,
                                            ValueExpression expression)

Assign a ValueExpression to an Jakarta Expression Language variable, replacing any previously assignment to the same variable. The assignment for the variable is removed if the expression is null.

Parameters:

variable - The variable name

expression - The ValueExpression to be assigned to the variable.

Returns:

The previous ValueExpression assigned to this variable, null if there is no previous assignment to this variable.