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 java.lang.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

Field Summary

Fields

Modifier and Type	Field	Description
private JexlEngine	jexl	The property solving jexl engine.
private T	object	The object serving as context provider.

Constructor Summary

Constructors

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

Method Summary

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

Field Detail

jexl

private final JexlEngine jexl

The property solving jexl engine.

object

private final T object

The object serving as context provider.

Constructor Detail

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 Detail

get

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

Gets the Jexl engine

Returns:

the Jexl engine

getObject

protected T getObject()

Gets the object exposed by this context

Returns:

the object exposed by this context

has

public boolean has(java.lang.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 java.lang.Object resolveNamespace(java.lang.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(java.lang.String name,
                java.lang.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.