javax.el
Class VariableMapper

java.lang.Object
  javax.el.VariableMapper

public abstract class VariableMapper
extends Object

The interface to a map between EL variables and the EL expressions they are associated with.

Since:

JSP 2.1

Constructor Summary
VariableMapper()

 

Method Summary
abstract  ValueExpression	resolveVariable(String variable)
abstract  ValueExpression	setVariable(String variable, ValueExpression expression)           Assign a ValueExpression to an EL 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()

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 EL 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 previouse assignment to this variable.