1 /* 2 * Copyright (c) 2015, 2020, 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 package jdk.test.lib.compiler; 24 25 import javax.tools.*; 26 import java.io.ByteArrayOutputStream; 27 import java.io.IOException; 28 import java.io.OutputStream; 29 import java.net.URI; 30 import java.util.Arrays; 31 import java.util.List; 32 import java.util.Map; 33 import java.util.stream.Collectors; 34 35 public class Compiler { 36 final private Map<String,String> input; 37 private List<String> options; 38 Compiler(Map<String,String> input)39 public Compiler(Map<String,String> input) { 40 this.input = input; 41 } 42 setRelease(int release)43 public Compiler setRelease(int release) { 44 // Setting the -release option does not work for some reason 45 // so do it the old fashioned way 46 // options = Arrays.asList("-release", String.valueOf(release)); 47 String target = String.valueOf(release); 48 options = Arrays.asList("-source", target, "-target", target, "-classpath", ""); 49 return this; 50 } 51 compile()52 public Map<String,byte[]> compile() { 53 List<SourceFileObject> cunits = createCompilationUnits(); 54 Map<String,ClassFileObject> cfos = createClassFileObjects(); 55 JavaCompiler jc = ToolProvider.getSystemJavaCompiler(); 56 JavaFileManager jfm = new CustomFileManager(jc.getStandardFileManager(null, null, null), cfos); 57 if(!jc.getTask(null, jfm, null, options, null, cunits).call()) { 58 throw new RuntimeException("Compilation failed"); 59 } 60 return createOutput(cfos); 61 } 62 createCompilationUnits()63 private List<SourceFileObject> createCompilationUnits() { 64 return input.entrySet().stream() 65 .map(e -> new SourceFileObject(e.getKey(), e.getValue())).collect(Collectors.toList()); 66 } 67 createClassFileObjects()68 private Map<String,ClassFileObject> createClassFileObjects() { 69 return input.keySet().stream() 70 .collect(Collectors.toMap(k -> k, k -> new ClassFileObject(k))); 71 } 72 createOutput(Map<String,ClassFileObject> cfos)73 private Map<String,byte[]> createOutput(Map<String,ClassFileObject> cfos) { 74 return cfos.keySet().stream().collect(Collectors.toMap(k -> k, k -> cfos.get(k).getBytes())); 75 } 76 77 private static class SourceFileObject extends SimpleJavaFileObject { 78 private final String source; 79 SourceFileObject(String name, String source)80 SourceFileObject(String name, String source) { 81 super(URI.create("string:///" + name.replace('.', '/') + Kind.SOURCE.extension), Kind.SOURCE); 82 this.source = source; 83 } 84 85 @Override getCharContent(boolean ignoreEncodingErrors)86 public CharSequence getCharContent(boolean ignoreEncodingErrors) { 87 return source; 88 } 89 } 90 91 private static class ClassFileObject extends SimpleJavaFileObject { 92 private final ByteArrayOutputStream baos = new ByteArrayOutputStream(); 93 ClassFileObject(String className)94 ClassFileObject(String className) { 95 super(URI.create(className), Kind.CLASS); 96 } 97 98 @Override openOutputStream()99 public OutputStream openOutputStream() throws IOException { 100 return baos; 101 } 102 getBytes()103 public byte[] getBytes() { 104 return baos.toByteArray(); 105 } 106 } 107 108 private static class CustomFileManager extends ForwardingJavaFileManager<JavaFileManager> { 109 private final Map<String,ClassFileObject> cfos; 110 CustomFileManager(JavaFileManager jfm, Map<String,ClassFileObject> cfos)111 CustomFileManager(JavaFileManager jfm, Map<String,ClassFileObject> cfos) { 112 super(jfm); 113 this.cfos = cfos; 114 } 115 116 @Override getJavaFileForOutput(JavaFileManager.Location loc, String name, JavaFileObject.Kind kind, FileObject sibling)117 public JavaFileObject getJavaFileForOutput(JavaFileManager.Location loc, String name, 118 JavaFileObject.Kind kind, FileObject sibling) throws IOException { 119 ClassFileObject cfo = cfos.get(name); 120 return cfo; 121 } 122 } 123 } 124