ModuleInfoMaker.java revision 16407:e77454faf897
1/* 2 * Copyright (c) 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. 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 24import java.io.BufferedWriter; 25import java.io.IOException; 26import java.nio.file.Files; 27import java.nio.file.Path; 28import java.util.Arrays; 29import java.util.regex.Matcher; 30import java.util.regex.Pattern; 31import java.util.stream.Stream; 32 33import static org.testng.Assert.assertTrue; 34 35/** 36 * Utility class for creating test modules. 37 */ 38public class ModuleInfoMaker { 39 private static String MODULE_INFO_JAVA = "module-info.java"; 40 private static Pattern MODULE_PATTERN = 41 Pattern.compile("module\\s+((?:\\w+\\.)*)"); 42 private static Pattern PACKAGE_PATTERN = 43 Pattern.compile("package\\s+(((?:\\w+\\.)*)(?:\\w+))"); 44 private static Pattern CLASS_PATTERN = 45 Pattern.compile("(?:public\\s+)?(?:class|enum|interface)\\s+(\\w+)"); 46 47 private final Path dir; 48 public ModuleInfoMaker(Path dir) { 49 this.dir = dir; 50 } 51 52 /** 53 * Create java source files of the given module 54 */ 55 public void writeJavaFiles(String module, String moduleInfoJava, String... contents) 56 throws IOException 57 { 58 Path msrc = dir.resolve(module); 59 new JavaSource(moduleInfoJava).write(msrc); 60 for (String c : contents) { 61 new JavaSource(c).write(msrc); 62 } 63 } 64 65 /** 66 * Compile the module to the given destination. 67 */ 68 public void compile(String module, Path dest, String... options) 69 throws IOException 70 { 71 Path msrc = dir.resolve(module); 72 Stream<String> args = 73 Stream.concat(Arrays.stream(options), 74 Stream.of("--module-source-path", 75 dir.toString())); 76 assertTrue(CompilerUtils.compile(msrc, dest, args.toArray(String[]::new)), 77 "Fail to compile " + module); 78 } 79 80 static class JavaSource { 81 final String source; 82 JavaSource(String source) { 83 this.source = source; 84 } 85 86 /** 87 * Writes the source code to a file in a specified directory. 88 * @param dir the directory 89 * @throws IOException if there is a problem writing the file 90 */ 91 public void write(Path dir) throws IOException { 92 Path file = dir.resolve(getJavaFileNameFromSource(source)); 93 Files.createDirectories(file.getParent()); 94 try (BufferedWriter out = Files.newBufferedWriter(file)) { 95 out.write(source.replace("\n", System.lineSeparator())); 96 } 97 } 98 99 /** 100 * Extracts the Java file name from the class declaration. 101 * This method is intended for simple files and uses regular expressions, 102 * so comments matching the pattern can make the method fail. 103 */ 104 static String getJavaFileNameFromSource(String source) { 105 String packageName = null; 106 107 Matcher matcher = MODULE_PATTERN.matcher(source); 108 if (matcher.find()) 109 return MODULE_INFO_JAVA; 110 111 matcher = PACKAGE_PATTERN.matcher(source); 112 if (matcher.find()) 113 packageName = matcher.group(1).replace(".", "/"); 114 115 matcher = CLASS_PATTERN.matcher(source); 116 if (matcher.find()) { 117 String className = matcher.group(1) + ".java"; 118 return (packageName == null) ? className : packageName + "/" + className; 119 } else if (packageName != null) { 120 return packageName + "/package-info.java"; 121 } else { 122 throw new Error("Could not extract the java class " + 123 "name from the provided source"); 124 } 125 } 126 } 127} 128