org.aopalliance.intercept.Joinpoint Maven / Gradle / Ivy
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package org.aopalliance.intercept;
import java.lang.reflect.AccessibleObject;
/**
* This interface represents a generic runtime joinpoint (in the AOP
* terminology).
*
* A runtime joinpoint is an event that occurs on a static
* joinpoint (i.e. a location in a the program). For instance, an
* invocation is the runtime joinpoint on a method (static joinpoint).
* The static part of a given joinpoint can be generically retrieved
* using the {@link #getStaticPart()} method.
*
*
In the context of an interception framework, a runtime joinpoint
* is then the reification of an access to an accessible object (a
* method, a constructor, a field), i.e. the static part of the
* joinpoint. It is passed to the interceptors that are installed on
* the static joinpoint.
*
* @see Interceptor */
public interface Joinpoint {
/**
* Proceeds to the next interceptor in the chain.
*
*
The implementation and the semantics of this method depends
* on the actual joinpoint type (see the children interfaces).
*
* @return see the children interfaces' proceed definition.
*
* @throws Throwable if the joinpoint throws an exception. */
Object proceed() throws Throwable;
/**
* Returns the object that holds the current joinpoint's static
* part.
*
*
For instance, the target object for an invocation.
*
* @return the object (can be null if the accessible object is
* static). */
Object getThis();
/**
* Returns the static part of this joinpoint.
*
*
The static part is an accessible object on which a chain of
* interceptors are installed. */
AccessibleObject getStaticPart();
}