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.

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

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

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

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

clear

public void clear()

Clears all variables.