    001// Licensed under the Apache License, Version 2.0 (the "License");
    002// you may not use this file except in compliance with the License.
    003// You may obtain a copy of the License at
    004//
    005// http://www.apache.org/licenses/LICENSE-2.0
    006//
    007// Unless required by applicable law or agreed to in writing, software
    008// distributed under the License is distributed on an "AS IS" BASIS,
    009// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    010// See the License for the specific language governing permissions and
    011// limitations under the License.
    012
    013package org.apache.tapestry5.internal.services.assets;
    014
    015import java.io.IOException;
    016import java.util.Map;
    017
    018import org.apache.tapestry5.ioc.annotations.Marker;
    019import org.apache.tapestry5.ioc.annotations.Primary;
    020import org.apache.tapestry5.services.assets.ResourceMinimizer;
    021import org.apache.tapestry5.services.assets.StreamableResource;
    022
    023/**
    024 * Implementation that delegates, via its configuration, to a real implementation based on the content type of the
    025 * resource.
    026 */
    027@Marker(Primary.class)
    028public class MasterResourceMinimizer implements ResourceMinimizer
    029{
    030    private final Map<String, ResourceMinimizer> configuration;
    031
    032    public MasterResourceMinimizer(Map<String, ResourceMinimizer> configuration)
    033    {
    034        this.configuration = configuration;
    035    }
    036
    037    /** Does nothing; an override of this service can be installed to provide minimization. */
    038    public StreamableResource minimize(StreamableResource resource) throws IOException
    039    {
    040        ResourceMinimizer minimizer = configuration.get(resource.getContentType().getMimeType());
    041
    042        return minimizer == null ? resource : minimizer.minimize(resource);
    043    }
    044}