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    
015    package org.apache.tapestry5.services.assets;
016    
017    import org.apache.tapestry5.ioc.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     */
026    public 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    }