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.enhance;
016
017import org.apache.tapestry.spec.InjectSpecification;
018
019/**
020 * A kind of enhancement worker dedicated to injection, based on the <inject> element of the
021 * specification. There are different types of injection which match up to different implementations
022 * of this interface (i.e., the Strategy pattern).
023 * 
024 * @author Howard M. Lewis Ship
025 * @since 4.0
026 * @see org.apache.tapestry.spec.InjectSpecification
027 * @see org.apache.tapestry.enhance.DispatchToInjectWorker
028 */
029public interface InjectEnhancementWorker
030{
031    /**
032     * Perform the enhancement defined by the {@link org.apache.tapestry.spec.InjectSpecification}.
033     * Thrown runtime exceptions are caught and reported by the invoker.
034     */
035
036    public void performEnhancement(EnhancementOperation op, InjectSpecification spec);
037
038}