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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:
 *   Adrian Colyer			Initial implementation
 * ******************************************************************/
package org.aspectj.weaver.tools;

/**
 * When extending AspectJ's pointcut parsing and
 * matching with custom PointcutDesignatorHandlers,
 * it may be necessary to match based on context information
 * at a join point not exposed simply by java.lang.reflect
 * member information or argument values. The matching context
 * interface provides an extension point for the specification
 * of additional shadow and join point context that can be
 * taken into account during the matching process.
 *
 *  @see DefaultMatchingContext
 */
public interface MatchingContext {

	/**
	 * Returns true iff this matching context has a defined
	 * binding for the given context parameter.
	 * @param contextParameterName
	 */
	boolean hasContextBinding(String contextParameterName);

	/**
	 * returns the binding associated with the
	 * given context parameter name (or null if
	 * there is no such context).
	 * @param contextParameterName
	 * @return
	 */
	Object getBinding(String contextParameterName);
}