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 +}
