1 /* 2 * Copyright (c) 2017, 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 /* 25 * @test 26 * @bug 8175235 27 * @summary type inference regression after JDK-8046685 28 * @library /tools/javac/lib 29 * @modules jdk.compiler/com.sun.source.util 30 * jdk.compiler/com.sun.tools.javac.api 31 * jdk.compiler/com.sun.tools.javac.code 32 * jdk.compiler/com.sun.tools.javac.file 33 * jdk.compiler/com.sun.tools.javac.tree 34 * jdk.compiler/com.sun.tools.javac.util 35 * @build DPrinter 36 * @run main InferenceRegressionTest02 37 */ 38 39 import java.io.*; 40 import java.net.URI; 41 import java.util.Arrays; 42 43 import javax.tools.JavaCompiler; 44 import javax.tools.JavaFileObject; 45 import javax.tools.SimpleJavaFileObject; 46 import javax.tools.ToolProvider; 47 48 import com.sun.source.tree.CompilationUnitTree; 49 import com.sun.source.util.JavacTask; 50 import com.sun.source.util.Trees; 51 import com.sun.tools.javac.api.JavacTrees; 52 import com.sun.tools.javac.file.JavacFileManager; 53 import com.sun.tools.javac.tree.JCTree; 54 import com.sun.tools.javac.util.Assert; 55 import com.sun.tools.javac.util.Context; 56 57 public class InferenceRegressionTest02 { main(String... args)58 public static void main(String... args) throws Exception { 59 new InferenceRegressionTest02().run(); 60 } 61 run()62 void run() throws Exception { 63 Context context = new Context(); 64 JavacFileManager.preRegister(context); 65 Trees trees = JavacTrees.instance(context); 66 StringWriter strOut = new StringWriter(); 67 PrintWriter pw = new PrintWriter(strOut); 68 DPrinter dprinter = new DPrinter(pw, trees); 69 final JavaCompiler tool = ToolProvider.getSystemJavaCompiler(); 70 JavacTask ct = (JavacTask)tool.getTask(null, null, null, null, null, Arrays.asList(new JavaSource())); 71 Iterable<? extends CompilationUnitTree> elements = ct.parse(); 72 ct.analyze(); 73 Assert.check(elements.iterator().hasNext()); 74 dprinter.treeTypes(true).printTree("", (JCTree)elements.iterator().next()); 75 String output = strOut.toString(); 76 Assert.check(!output.contains("java.lang.Object"), "there shouldn't be any type instantiated to Object"); 77 } 78 79 static class JavaSource extends SimpleJavaFileObject { 80 81 String source = 82 "import java.util.function.*;\n" + 83 "import java.util.*;\n" + 84 "import java.util.stream.*;\n" + 85 86 "class Foo {\n" + 87 " void test(List<Map.Entry<Foo, Foo>> ls) {\n" + 88 " Map<Foo, Set<Foo>> res = ls.stream()\n" + 89 " .collect(Collectors.groupingBy(Map.Entry::getKey,\n" + 90 " HashMap::new,\n" + 91 " Collectors.mapping(Map.Entry::getValue, Collectors.toSet())));\n" + 92 " }\n" + 93 "}"; 94 JavaSource()95 public JavaSource() { 96 super(URI.create("myfo:/Foo.java"), JavaFileObject.Kind.SOURCE); 97 } 98 99 @Override getCharContent(boolean ignoreEncodingErrors)100 public CharSequence getCharContent(boolean ignoreEncodingErrors) { 101 return source; 102 } 103 } 104 } 105