1 /* 2 * Copyright (c) 2018, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 package com.sun.tools.jextract; 25 26 import java.nio.file.Files; 27 import java.nio.file.Path; 28 import java.util.ArrayList; 29 import java.util.LinkedHashMap; 30 import java.util.List; 31 import java.util.Map; 32 import java.util.logging.Level; 33 34 public class HeaderResolver { 35 36 // The folder path mapping to package name 37 private final Map<Path, String> pkgMap = new LinkedHashMap<>(); 38 // The header file parsed 39 private final Map<Path, HeaderFile> headerMap = new LinkedHashMap<>(); 40 private final Log log; 41 private final Path builtinHeader; 42 43 public HeaderResolver(Context ctx) { 44 this.log = ctx.log; 45 usePackageForFolder(Context.getBuiltinHeadersDir(), "clang_support"); 46 this.builtinHeader = Context.getBuiltinHeaderFile(); 47 ctx.sources.stream() 48 .map(Path::getParent) 49 .forEach(p -> usePackageForFolder(p, ctx.options.targetPackage)); 50 ctx.options.pkgMappings.forEach(this::usePackageForFolder); 51 } 52 53 private static String safeFileName(String filename) { 54 int ext = filename.lastIndexOf('.'); 55 String name = ext != -1 ? filename.substring(0, ext) : filename; 56 return Utils.toClassName(name); 57 } 58 59 public static String headerInterfaceName(String filename) { 60 return safeFileName(filename) + "_h"; 61 } 62 63 public static String staticForwarderName(String filename) { 64 return safeFileName(filename) + "_lib"; 65 } 66 67 private void usePackageForFolder(Path folder, String pkg) { 68 folder = folder.normalize().toAbsolutePath(); 69 String existing = pkgMap.putIfAbsent(folder, pkg); 70 final String finalFolder = (null == folder) ? "all folders not configured" : folder.toString(); 71 if (existing == null) { 72 log.print(Level.CONFIG, () -> "Package " + pkg + " is selected for " + finalFolder); 73 } else { 74 String pkgName = pkg.isEmpty() ? "<default-package>" : pkg; 75 log.print(Level.WARNING, () -> "Package " + existing + " had been selected for " + finalFolder + ", request to use " + pkgName + " is ignored."); 76 } 77 } 78 79 // start of header file resolution logic 80 81 static class HeaderPath { 82 final String pkg; 83 final String headerCls; 84 final String forwarderCls; 85 86 HeaderPath(String pkg, String headerCls, String forwarderCls) { 87 this.pkg = pkg; 88 this.headerCls = headerCls; 89 this.forwarderCls = forwarderCls; 90 } 91 } 92 93 /** 94 * Determine package and interface name given a path. If the path is 95 * a folder, then only package name is determined. The package name is 96 * determined with the longest path matching the setup. If the path is not 97 * setup for any package, the default package name is returned. 98 * 99 * @param origin The source path 100 * @return The HeaderPath 101 * @see Context::usePackageForFolder(Path, String) 102 */ 103 private HeaderPath resolveHeaderPath(Path origin) { 104 // normalize to absolute path 105 origin = origin.normalize().toAbsolutePath(); 106 if (Files.isDirectory(origin)) { 107 throw new IllegalStateException("Not an header file: " + origin); 108 } 109 String filename = origin.getFileName().toString(); 110 origin = origin.getParent(); 111 Path path = origin; 112 113 // search the map for a hit with longest path 114 while (path != null && !pkgMap.containsKey(path)) { 115 path = path.getParent(); 116 } 117 118 String pkg; 119 if (path != null) { 120 pkg = pkgMap.get(path); 121 if (path.getNameCount() != origin.getNameCount()) { 122 String sep = pkg.isEmpty() ? "" : "."; 123 for (int i = path.getNameCount() ; i < origin.getNameCount() ; i++) { 124 pkg += sep + Utils.toJavaIdentifier(origin.getName(i).toString()); 125 sep = "."; 126 } 127 usePackageForFolder(origin, pkg); 128 } 129 } else { 130 //infer a package name from path 131 List<String> parts = new ArrayList<>(); 132 for (Path p : origin) { 133 parts.add(Utils.toJavaIdentifier(p.toString())); 134 } 135 pkg = String.join(".", parts); 136 usePackageForFolder(origin, pkg); 137 } 138 139 return new HeaderPath(pkg, headerInterfaceName(filename), staticForwarderName(filename)); 140 } 141 142 private HeaderFile getHeaderFile(Path header) { 143 if (!Files.isRegularFile(header)) { 144 log.print(Level.WARNING, () -> "Not a regular file: " + header.toString()); 145 throw new IllegalArgumentException(header.toString()); 146 } 147 148 final HeaderPath hp = resolveHeaderPath(header); 149 return new HeaderFile(this, header, hp.pkg, hp.headerCls, hp.forwarderCls); 150 } 151 152 public HeaderFile headerFor(Path path) { 153 if (path == null) { 154 path = builtinHeader; 155 } 156 157 return headerMap.computeIfAbsent(path.normalize().toAbsolutePath(), this::getHeaderFile); 158 } 159 }