001// Copyright 2011 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.tapestry5.services.assets;
016
017import org.apache.tapestry5.commons.Resource;
018
019/**
020 * Used by some {@link ResourceTransformer} implementations to track additional dependencies that can arise
021 * when the underlying resource being transformed can be dependent on other resources (for instance, if it has the
022 * notion of "including" or "importing" content).
023 *
024 * @since 5.3
025 */
026public interface ResourceDependencies
027{
028    /**
029     * Marks the dependency as an additional resource. A change to the dependency is considered the same as a change to
030     * the resource being transformed.
031     *
032     * @param dependency
033     */
034    void addDependency(Resource dependency);
035}