https://github.com/spring-projects/spring-framework: Spring AOP (Spring IO)
  • Juergen Hoeller 
AspectJ integration package. Includes Spring AOP advice implementations for AspectJ 5
annotation-style methods, and an AspectJExpressionPointcut: a Spring AOP Pointcut
implementation that allows use of the AspectJ pointcut expression language with the Spring AOP
runtime framework.

Note that use of this package does not require the use of the ajc compiler or AspectJ load-time weaver. It is intended to enable the use of a valuable subset of AspectJ functionality, with consistent semantics, with the proxy-based Spring AOP framework. 
/**
 * AspectJ integration package. Includes Spring AOP advice implementations for AspectJ 5
 * annotation-style methods, and an AspectJExpressionPointcut: a Spring AOP Pointcut
 * implementation that allows use of the AspectJ pointcut expression language with the Spring AOP
 * runtime framework.
 *
 * <p>Note that use of this package does <i>not</i> require the use of the {@code ajc} compiler
 * or AspectJ load-time weaver. It is intended to enable the use of a valuable subset of AspectJ
 * functionality, with consistent semantics, with the proxy-based Spring AOP framework.
 */
@NonNullApi
@NonNullFields
package org.springframework.aop.aspectj;

import org.springframework.lang.NonNullApi;
import org.springframework.lang.NonNullFields;