Package org.aspectj.lang

Class Aspects

java.lang.Object

org.aspectj.lang.Aspects

public class Aspects
extends Object

Handles generic aspectOf method when those are not available in the aspects but added later on thru load time weaving. Aspects.aspectOf(..) is doing reflective calls to the aspect aspectOf, so for better performance consider using ajc compilation of the aspects and using them as a binary dependancies in your project.

Author:

Alexandre Vasseur

Constructor Summary

Constructors

Constructor	Description
Aspects()

Method Summary

Modifier and Type	Method	Description
static <T> T	aspectOf(Class<T> aspectClass)
static <T> T	aspectOf(Class<T> aspectClass, Class<?> perTypeWithin)
static <T> T	aspectOf(Class<T> aspectClass, Object perObject)
static boolean	hasAspect(Class<?> aspectClass)
static boolean	hasAspect(Class<?> aspectClass, Class<?> perTypeWithin)
static boolean	hasAspect(Class<?> aspectClass, Object perObject)

Methods inherited from class java.lang.Object

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

Constructor Details

Aspects

public Aspects()

Method Details

aspectOf

public static <T> T aspectOf(Class<T> aspectClass)
                      throws NoAspectBoundException

Type Parameters:

T - the expected class of the aspect

Parameters:

aspectClass - the aspect class

Returns:

the singleton aspect or the percflow / percflowbelow associated with the current thread

Throws:

NoAspectBoundException - if no such aspect

aspectOf

public static <T> T aspectOf(Class<T> aspectClass,
 Object perObject)
                      throws NoAspectBoundException

Type Parameters:

T - the expected class of the aspect

Parameters:

aspectClass - the aspect class

perObject - the this/target object for which to look for an aspect instance

Returns:

the associated perthis / pertarget aspect instance

Throws:

NoAspectBoundException - if no such aspect, or no aspect bound

aspectOf

public static <T> T aspectOf(Class<T> aspectClass,
 Class<?> perTypeWithin)
                      throws NoAspectBoundException

Type Parameters:

T - the expected class of the aspect

Parameters:

aspectClass - the aspect class

perTypeWithin - the class for which to search for an aspect instance

Returns:

the associated aspect instance

Throws:

NoAspectBoundException - if no such aspect, or no aspect bound

hasAspect

public static boolean hasAspect(Class<?> aspectClass)
                         throws NoAspectBoundException

Parameters:

aspectClass - the aspect class

Returns:

true if singleton aspect or percflow / percflowbelow aspect is bound

Throws:

NoAspectBoundException - if not bound

hasAspect

public static boolean hasAspect(Class<?> aspectClass,
 Object perObject)
                         throws NoAspectBoundException

Parameters:

aspectClass - the aspect class

perObject - the this/target object for which to look for an aspect instance

Returns:

true if the perthis / pertarget aspect is bound

Throws:

NoAspectBoundException - if not bound

hasAspect

public static boolean hasAspect(Class<?> aspectClass,
 Class<?> perTypeWithin)
                         throws NoAspectBoundException

Parameters:

aspectClass - the aspect class

perTypeWithin - class

Returns:

true if the pertypewithin aspect is bound

Throws:

NoAspectBoundException - if not bound