001// Copyright 2005 The Apache Software Foundation
002//
003// Licensed under the Apache License, Version 2.0 (the "License");
004// you may not use this file except in compliance with the License.
005// You may obtain a copy of the License at
006//
007//     http://www.apache.org/licenses/LICENSE-2.0
008//
009// Unless required by applicable law or agreed to in writing, software
010// distributed under the License is distributed on an "AS IS" BASIS,
011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012// See the License for the specific language governing permissions and
013// limitations under the License.
014
015package org.apache.tapestry.annotations;
016
017import java.lang.reflect.Method;
018
019import org.apache.hivemind.Location;
020import org.apache.tapestry.enhance.EnhancementOperation;
021import org.apache.tapestry.spec.IComponentSpecification;
022
023/**
024 * Defines workers that perform annotation enhancements at the method level.
025 * 
026 * @author Howard Lewis Ship
027 * @since 4.0
028 */
029public interface MethodAnnotationEnhancementWorker
030{
031    /**
032     * Performs a particular enhancement based on a registered annotation. Exception reporting is
033     * the responsibility of the caller.
034     * 
035     * @param op
036     *            the enhancement operaration
037     * @param spec
038     *            the specification of the component for which a class is being enhanced
039     * @param method
040     *            the method to which the annotation is attached. The annotation
041     *            may be obtained from the method.
042     * @param location TODO
043     */
044
045    public void performEnhancement(EnhancementOperation op, IComponentSpecification spec,
046            Method method, Location location);
047}