jakarta.el

public abstract Class VariableMapper

Class Inheritance

extends Object

java.lang.Object
jakarta.el.VariableMapper

Known Direct Subclasses

jakarta.el.StandardELContext.DefaultVariableMapper

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

Access	Constructor and Description
public	VariableMapper()

Method Summary

Modifier and Type	Method and Description
public abstract ValueExpression	Returns: the ValueExpression assigned to the variable, null if there is no previous assignment to this variable. resolveVariable(String The variable name variable)
public abstract ValueExpression	Returns: The previous ValueExpression assigned to this variable, null if there is no previous assignment to this variable. setVariable(String The variable name variable, ValueExpression The ValueExpression to be assigned to the variable. expression) Assign a ValueExpression to an Jakarta Expression Language variable, replacing any previously assignment to the same variable.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Constructor Detail

VariableMapper	back to summary
public VariableMapper()

Method Detail

resolveVariable	back to summary
public abstract ValueExpression resolveVariable(String variable) Parameters variable:String The variable name Returns:ValueExpression the ValueExpression assigned to the variable, null if there is no previous assignment to this variable.

setVariable back to summary

setVariable	back to summary
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:String The variable name expression:ValueExpression The ValueExpression to be assigned to the variable. Returns:ValueExpression The previous ValueExpression assigned to this variable, null if there is no previous assignment to this variable.

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:String: The variable name
expression:ValueExpression: The ValueExpression to be assigned to the variable.

Returns:ValueExpression

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