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The AspectJ weaver applies aspects to Java classes. It can be used as a Java agent in order to apply load-time weaving (LTW) during class-loading and also contains the AspectJ runtime classes.

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/*******************************************************************************
 * Copyright (c) 2005 Contributors.
 * All rights reserved.
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Public License v 2.0
 * which accompanies this distribution and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
 *
 * Contributors:
 * initial implementation              Alexandre Vasseur
 *******************************************************************************/
package org.aspectj.lang.annotation;

import java.lang.annotation.Target;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

/**
 * Around advice
 *
 * @author Alexandre Vasseur
 */
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface Around {

    /**
     * @return the pointcut expression where to bind the advice
     */
    String value();

    /**
     * When compiling without debug info, or when interpreting pointcuts at runtime,
     * the names of any arguments used in the advice declaration are not available.
     * Under these circumstances only, it is necessary to provide the arg names in
     * the annotation - these MUST duplicate the names used in the annotated method.
     * Format is a simple comma-separated list.
     * @return the argument names (should match the names on the annotated method)
     */
    String argNames() default "";

}