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 java.io.IOException; 018import java.util.Map; 019 020import org.apache.tapestry5.ioc.annotations.Marker; 021import org.apache.tapestry5.ioc.annotations.Primary; 022import org.apache.tapestry5.services.assets.ResourceMinimizer; 023import org.apache.tapestry5.services.assets.StreamableResource; 024 025/** 026 * Implementation that delegates, via its configuration, to a real implementation based on the content type of the 027 * resource. 028 */ 029@Marker(Primary.class) 030public class MasterResourceMinimizer implements ResourceMinimizer 031{ 032 private final Map<String, ResourceMinimizer> configuration; 033 034 public MasterResourceMinimizer(Map<String, ResourceMinimizer> configuration) 035 { 036 this.configuration = configuration; 037 } 038 039 /** Does nothing; an override of this service can be installed to provide minimization. */ 040 public StreamableResource minimize(StreamableResource resource) throws IOException 041 { 042 ResourceMinimizer minimizer = configuration.get(resource.getContentType()); 043 044 return minimizer == null ? resource : minimizer.minimize(resource); 045 } 046}