    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.internal.services.assets;
    016
    017    import org.apache.tapestry5.ioc.Resource;
    018    import org.apache.tapestry5.services.assets.*;
    019
    020    import java.io.IOException;
    021
    022    /**
    023     * Loops the result through the {@link ResourceMinimizer} service.
    024     */
    025    public class SRSMinimizingInterceptor implements StreamableResourceSource
    026    {
    027        private final StreamableResourceSource delegate;
    028
    029        private final ResourceMinimizer minimizer;
    030
    031        public SRSMinimizingInterceptor(StreamableResourceSource delegate, ResourceMinimizer minimizer)
    032        {
    033            this.delegate = delegate;
    034            this.minimizer = minimizer;
    035        }
    036
    037        public StreamableResource getStreamableResource(Resource baseResource, StreamableResourceProcessing processing, ResourceDependencies dependencies)
    038                throws IOException
    039        {
    040            StreamableResource streamable = delegate.getStreamableResource(baseResource, processing, dependencies);
    041
    042            if (processing != StreamableResourceProcessing.FOR_AGGREGATION)
    043            {
    044                return minimizer.minimize(streamable);
    045            }
    046
    047            return streamable;
    048        }
    049
    050    }