1 /* 2 * Copyright (c) 2014, 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 */ 25 26 package jdk.internal.jimage; 27 28 import java.io.IOException; 29 import java.nio.ByteBuffer; 30 import java.nio.IntBuffer; 31 import java.util.ArrayList; 32 import java.util.HashMap; 33 import java.util.List; 34 import java.util.Map; 35 36 // Utility to read module info from .jimage file. 37 38 public final class PackageModuleMap { 39 private PackageModuleMap() {} 40 41 public static final String MODULES_ENTRY = "module/modules.offsets"; 42 public static final String PACKAGES_ENTRY = "packages.offsets"; 43 44 /* 45 * Returns a package-to-module map. 46 * 47 * The package name is in binary name format. 48 */ 49 static Map<String,String> readFrom(ImageReader reader) throws IOException { 50 Map<String,String> result = new HashMap<>(); 51 List<String> moduleNames = reader.getNames(MODULES_ENTRY); 52 53 for (String moduleName : moduleNames) { 54 List<String> packageNames = reader.getNames(moduleName + "/" + PACKAGES_ENTRY); 55 56 for (String packageName : packageNames) { 57 result.put(packageName, moduleName); 58 } 59 } 60 return result; 61 } 62 }