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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based @AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step. This library is a superset of AspectJ weaver and hence also of AspectJ runtime.

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/*******************************************************************************
 * Copyright (c) 2010, 2020 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.osgi.internal.serviceregistry;

import org.osgi.framework.ServiceRegistration;

/**
 * A callable hook that contains the context for call a collection of hooks.
 * This is effectively a "closure" for calling each hook. The hook context
 * must know the type of the hook object, the method to call on the hook
 * as well as all the parameters which need to be passed to the hook method.
 *
 */
@FunctionalInterface
public interface HookContext {

	/**
	 * Call the specified hook.
	 *
	 * @param hook The hook object to call. The hook object must be of the type
	 * supported by this hook context. If it is not, then this method will
	 * simply return.
	 * @param hookRegistration the registration for the hook object
	 * @throws Exception An exception thrown by the hook object.
	 */
	public void call(T hook, ServiceRegistration hookRegistration) throws Exception;

	/**
	 * Returns true if the given registration should be skipped.
	 * @param hookRegistration the registration to check
	 * @return true if the given registration should be skipped.
	 */
	public default boolean skipRegistration(ServiceRegistration hookRegistration) {
		return false;
	}
}