org.apache.commons.jexl2
Interface JexlContext

All Known Implementing Classes:

MapContext, ObjectContext, ReadonlyContext, UnifiedJEXL.TemplateContext

public interface JexlContext

Manages variables which can be referenced in a JEXL expression.

Note that JEXL may use '$jexl' and '$ujexl' variables for internal purpose; setting or getting those variables may lead to unexpected results unless specified otherwise.

Since:

1.0

Version:

$Id: JexlContext.java 1202769 2011-11-16 16:33:02Z henrib $

Method Summary

Object	get(String name) Gets the value of a variable.
boolean	has(String name) Checks whether a variable is defined in this context.
void	set(String name, Object value) Sets the value of a variable.

Method Detail

get

Object get(String name)

Gets the value of a variable.

Parameters:

name - the variable's name

Returns:

the value

set

void set(String name,
         Object value)

Sets the value of a variable.

Parameters:

name - the variable's name

value - the variable's value

has

boolean has(String name)

Checks whether a variable is defined in this context.

A variable may be defined with a null value; this method checks whether the value is null or if the variable is undefined.

Parameters:

name - the variable's name

Returns:

true if it exists, false otherwise