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 org.apache.hivemind.Location;
018import org.apache.tapestry.enhance.EnhancementOperation;
019import org.apache.tapestry.spec.IComponentSpecification;
020
021/**
022 * Defines workers that perform annotation enhancements at the class level.
023 * 
024 * @author Howard Lewis Ship
025 * @since 4.0
026 */
027public interface ClassAnnotationEnhancementWorker
028{
029    /**
030     * Performs a particular enhancement based on a registered annotation. Exception reporting is
031     * the responsibility of the caller.
032     * 
033     * @param op
034     *            the enhancement operaration
035     * @param spec
036     *            the specification of the component for which a class is being enhanced
037     * @param baseClass
038     *            the class containing the annotation
039     * @param location
040     *            the location associated with the annotation
041     */
042
043    public void performEnhancement(EnhancementOperation op, IComponentSpecification spec,
044            Class baseClass, Location location);
045
046}