Package org.apache.commons.jexl3

Class ObjectContext<T>

java.lang.Object

org.apache.commons.jexl3.ObjectContext<T>

Type Parameters:

T - the wrapped object type to use

All Implemented Interfaces:

JexlContext, JexlContext.NamespaceResolver

public class ObjectContext<T>
extends Object
implements JexlContext, JexlContext.NamespaceResolver

Wraps an Object as a JEXL context and NamespaceResolver.

Since:

3.0

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
ObjectContext(JexlEngine engine, T wrapped)	Creates a new ObjectContext.

Method Summary

Modifier and Type	Method	Description
Object	get(String name)	Gets the value of a variable.
protected JexlEngine	getJexl()
protected T	getObject()
boolean	has(String name)	Checks whether a variable is defined in this context.
Object	resolveNamespace(String name)	Resolves a namespace by its name.
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

ObjectContext

public ObjectContext(JexlEngine engine,
 T wrapped)

Creates a new ObjectContext.

Parameters:

engine - the jexl engine to use to solve properties

wrapped - the object to wrap in this context

Method Details

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

getJexl

protected JexlEngine getJexl()

Returns:

the Jexl engine

getObject

protected T getObject()

Returns:

the object exposed by this context

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

resolveNamespace

public Object resolveNamespace(String name)

Description copied from interface: JexlContext.NamespaceResolver

Resolves a namespace by its name.

Specified by:

resolveNamespace in interface JexlContext.NamespaceResolver

Parameters:

name - the name

Returns:

the namespace object

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