ResourceDecompressorRepository.java revision 13901:b2a69d66dc65
1/* 2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25package jdk.internal.jimage.decompressor; 26 27import java.io.IOException; 28import java.util.HashMap; 29import java.util.Map; 30import java.util.Properties; 31 32/** 33 * 34 * JLink Decompressors. All decompressors must be registered in the static 35 * initializer of this class. 36 * 37 * @implNote This class needs to maintain JDK 8 source compatibility. 38 * 39 * It is used internally in the JDK to implement jimage/jrtfs access, 40 * but also compiled and delivered as part of the jrtfs.jar to support access 41 * to the jimage file provided by the shipped JDK by tools running on JDK 8. 42 */ 43public final class ResourceDecompressorRepository { 44 45 private ResourceDecompressorRepository() { 46 } 47 48 private static final Map<String, ResourceDecompressorFactory> factories = new HashMap<>(); 49 50 static { 51 registerReaderProvider(new ZipDecompressorFactory()); 52 registerReaderProvider(new StringSharingDecompressorFactory()); 53 } 54 55 /** 56 * Build a new decompressor for the passed name. 57 * @param properties Contains plugin configuration. 58 * @param name The plugin name to build. 59 * @return A decompressor or null if not found 60 * @throws IOException 61 */ 62 public static ResourceDecompressor newResourceDecompressor(Properties properties, 63 String name) throws IOException { 64 65 ResourceDecompressorFactory fact = factories.get(name); 66 if (fact != null) { 67 return fact.newDecompressor(properties); 68 } 69 return null; 70 } 71 72 private static void registerReaderProvider(ResourceDecompressorFactory factory) { 73 factories.put(factory.getName(), factory); 74 } 75 76 77} 78