Package org.apache.commons.jexl3

Class MapContext

java.lang.Object

org.apache.commons.jexl3.MapContext

All Implemented Interfaces:

JexlContext

public class MapContext
extends Object
implements JexlContext

Wraps a map in a context.

Each entry in the map is considered a variable name, value pair.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.commons.jexl3.JexlContext

JexlContext.AnnotationProcessor, JexlContext.CancellationHandle, JexlContext.ClassNameResolver, JexlContext.ModuleProcessor, JexlContext.NamespaceFunctor, JexlContext.NamespaceResolver, JexlContext.OptionsHandle, JexlContext.PragmaProcessor, JexlContext.ThreadLocal

Constructor Summary

Constructors

Constructor	Description
MapContext()	Creates a MapContext on an automatically allocated underlying HashMap.
MapContext(Map<String,Object> vars)	Creates a MapContext wrapping an existing user provided map.

Method Summary

Modifier and Type	Method	Description
void	clear()	Clears all variables.
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.

Methods inherited from class java.lang.Object

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

Constructor Details

MapContext

public MapContext()

Creates a MapContext on an automatically allocated underlying HashMap.

MapContext

public MapContext(Map<String,Object> vars)

Creates a MapContext wrapping an existing user provided map.

Parameters:

vars - the variable map

Method Details

clear

public void clear()

Clears all variables.

get

public Object get(String name)

Description copied from interface: JexlContext

Gets the value of a variable.

Specified by:

get in interface JexlContext

Parameters:

name - the variable's name

Returns:

the value

has

public boolean has(String name)

Description copied from interface: JexlContext

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

set

public void set(String name,
 Object value)

Description copied from interface: JexlContext

Sets the value of a variable.

Specified by:

set in interface JexlContext

Parameters:

name - the variable's name

value - the variable's value