org.apache.commons.jexl2

Class ReadonlyContext

java.lang.Object

org.apache.commons.jexl2.ReadonlyContext

All Implemented Interfaces:

JexlContext

public final class ReadonlyContext
extends java.lang.Object
implements JexlContext

A readonly context wrapper.

Since:

2.1

Constructor Summary

Constructors

Constructor and Description
ReadonlyContext(JexlContext context) Creates a new readonly context.

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.Object	get(java.lang.String name) Gets the value of a variable.
boolean	has(java.lang.String name) Checks whether a variable is defined in this context.
void	set(java.lang.String name, java.lang.Object value) Will throw an UnsupportedOperationException when called; the JexlEngine deals with it appropriately.

Methods inherited from class java.lang.Object

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

Constructor Detail

ReadonlyContext

public ReadonlyContext(JexlContext context)

Creates a new readonly context.

Parameters:

context - the wrapped context

Method Detail

get

public java.lang.Object get(java.lang.String name)

Gets the value of a variable.

Specified by:

get in interface JexlContext

Parameters:

name - the variable's name

Returns:

the value

set

public void set(java.lang.String name,
       java.lang.Object value)

Will throw an UnsupportedOperationException when called; the JexlEngine deals with it appropriately.

Specified by:

set in interface JexlContext

Parameters:

name - the unused variable name

value - the unused variable value

has

public boolean has(java.lang.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.

Specified by:

has in interface JexlContext

Parameters:

name - the variable's name

Returns:

true if it exists, false otherwise