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 Description

ReadonlyContext(JexlContext context)
Creates a new readonly context.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	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