1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/test/tools/javac/lambda/lambdaNaming/TestNonSerializableLambdaNameStability.java Wed Sep 16 10:56:23 2015 +0200 1.3 @@ -0,0 +1,157 @@ 1.4 +/* 1.5 + * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 1.7 + * 1.8 + * This code is free software; you can redistribute it and/or modify it 1.9 + * under the terms of the GNU General Public License version 2 only, as 1.10 + * published by the Free Software Foundation. 1.11 + * 1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT 1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1.15 + * version 2 for more details (a copy is included in the LICENSE file that 1.16 + * accompanied this code). 1.17 + * 1.18 + * You should have received a copy of the GNU General Public License version 1.19 + * 2 along with this work; if not, write to the Free Software Foundation, 1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1.21 + * 1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 1.23 + * or visit www.oracle.com if you need additional information or have any 1.24 + * questions. 1.25 + */ 1.26 + 1.27 +/* 1.28 + * @test 1.29 + * @bug 8067422 1.30 + * @summary Check that the lambda names are not unnecessarily unstable 1.31 + * @run main TestNonSerializableLambdaNameStability 1.32 + */ 1.33 + 1.34 +import com.sun.tools.classfile.ClassFile; 1.35 +import com.sun.tools.classfile.Method; 1.36 + 1.37 +import java.io.ByteArrayInputStream; 1.38 +import java.io.ByteArrayOutputStream; 1.39 +import java.io.IOException; 1.40 +import java.io.InputStream; 1.41 +import java.io.OutputStream; 1.42 +import java.net.URI; 1.43 +import java.net.URISyntaxException; 1.44 +import java.util.ArrayList; 1.45 +import java.util.HashMap; 1.46 +import java.util.List; 1.47 +import java.util.Map; 1.48 + 1.49 +import javax.tools.FileObject; 1.50 +import javax.tools.ForwardingJavaFileManager; 1.51 +import javax.tools.JavaCompiler; 1.52 +import javax.tools.JavaFileManager; 1.53 +import javax.tools.JavaFileObject; 1.54 +import javax.tools.JavaFileObject.Kind; 1.55 +import javax.tools.SimpleJavaFileObject; 1.56 +import javax.tools.ToolProvider; 1.57 + 1.58 +public class TestNonSerializableLambdaNameStability { 1.59 + 1.60 + public static void main(String... args) throws Exception { 1.61 + new TestNonSerializableLambdaNameStability().run(); 1.62 + } 1.63 + 1.64 + String lambdaSource = "public class L%d {\n" + 1.65 + " public static class A {\n" + 1.66 + " private Runnable r = () -> { };\n" + 1.67 + " }\n" + 1.68 + " public static class B {\n" + 1.69 + " private Runnable r = () -> { };\n" + 1.70 + " }\n" + 1.71 + " private Runnable r = () -> { };\n" + 1.72 + "}\n"; 1.73 + 1.74 + String expectedLambdaMethodName = "lambda$new$0"; 1.75 + 1.76 + void run() throws Exception { 1.77 + List<JavaFileObject> sources = new ArrayList<>(); 1.78 + 1.79 + for (int i = 0; i < 3; i++) { 1.80 + sources.add(new SourceJavaFileObject("L" + i, String.format(lambdaSource, i))); 1.81 + } 1.82 + 1.83 + JavaCompiler compiler = ToolProvider.getSystemJavaCompiler(); 1.84 + 1.85 + try (MemoryFileManager fm = new MemoryFileManager(compiler.getStandardFileManager(null, null, null))) { 1.86 + if (!compiler.getTask(null, fm, null, null, null, sources).call()) { 1.87 + throw new AssertionError("Compilation failed!"); 1.88 + } 1.89 + 1.90 + for (String file : fm.name2Content.keySet()) { 1.91 + byte[] fileBytes = fm.name2Content.get(file); 1.92 + try (InputStream in = new ByteArrayInputStream(fileBytes)) { 1.93 + boolean foundLambdaMethod = false; 1.94 + ClassFile cf = ClassFile.read(in); 1.95 + StringBuilder seenMethods = new StringBuilder(); 1.96 + String sep = ""; 1.97 + for (Method m : cf.methods) { 1.98 + String methodName = m.getName(cf.constant_pool); 1.99 + if (expectedLambdaMethodName.equals(methodName)) { 1.100 + foundLambdaMethod = true; 1.101 + break; 1.102 + } 1.103 + seenMethods.append(sep); 1.104 + seenMethods.append(methodName); 1.105 + sep = ", "; 1.106 + } 1.107 + 1.108 + if (!foundLambdaMethod) { 1.109 + throw new AbstractMethodError("Did not find the lambda method, " + 1.110 + "found methods: " + seenMethods.toString()); 1.111 + } 1.112 + } 1.113 + } 1.114 + } 1.115 + } 1.116 + 1.117 + class MemoryFileManager extends ForwardingJavaFileManager<JavaFileManager> { 1.118 + 1.119 + final Map<String, byte[]> name2Content = new HashMap<>(); 1.120 + 1.121 + public MemoryFileManager(JavaFileManager fileManager) { 1.122 + super(fileManager); 1.123 + } 1.124 + 1.125 + @Override 1.126 + public JavaFileObject getJavaFileForOutput(Location location, String className, Kind kind, FileObject sibling) throws IOException { 1.127 + try { 1.128 + return new SimpleJavaFileObject(new URI("mem://" + className.replace('.', '/') + kind.extension), kind) { 1.129 + @Override public OutputStream openOutputStream() throws IOException { 1.130 + return new ByteArrayOutputStream() { 1.131 + @Override public void close() throws IOException { 1.132 + super.close(); 1.133 + name2Content.put(className, toByteArray()); 1.134 + } 1.135 + }; 1.136 + } 1.137 + }; 1.138 + } catch (URISyntaxException ex) { 1.139 + throw new AssertionError(ex); 1.140 + } 1.141 + } 1.142 + 1.143 + } 1.144 + 1.145 + class SourceJavaFileObject extends SimpleJavaFileObject { 1.146 + 1.147 + private final String code; 1.148 + 1.149 + public SourceJavaFileObject(String name, String code) throws URISyntaxException { 1.150 + super(new URI("mem:///" + name + ".java"), Kind.SOURCE); 1.151 + this.code = code; 1.152 + } 1.153 + 1.154 + @Override 1.155 + public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException { 1.156 + return code; 1.157 + } 1.158 + 1.159 + } 1.160 +}