    001// Copyright 2011, 2012 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.internal.services.assets;
    016
    017import org.apache.tapestry5.commons.Resource;
    018import org.apache.tapestry5.services.assets.*;
    019
    020import java.io.IOException;
    021
    022/**
    023 * Loops the result through the {@link ResourceMinimizer} service.
    024 */
    025public class SRSMinimizingInterceptor extends DelegatingSRS
    026{
    027    private final ResourceMinimizer minimizer;
    028
    029    public SRSMinimizingInterceptor(StreamableResourceSource delegate, ResourceMinimizer minimizer)
    030    {
    031        super(delegate);
    032        this.minimizer = minimizer;
    033    }
    034
    035    public StreamableResource getStreamableResource(Resource baseResource, StreamableResourceProcessing processing, ResourceDependencies dependencies)
    036            throws IOException
    037    {
    038        StreamableResource streamable = delegate.getStreamableResource(baseResource, processing, dependencies);
    039
    040        if (processing != StreamableResourceProcessing.FOR_AGGREGATION)
    041        {
    042            return minimizer.minimize(streamable);
    043        }
    044
    045        return streamable;
    046    }
    047
    048}