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.internal.services.assets;
016
017import org.apache.tapestry5.ioc.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 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}