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}