jdk8-mips64-public/langtools: test/tools/javac/lambda/lambdaNaming/TestNonSerializableLambdaNameStability.java@51997141b15c (annotated)

test/tools/javac/lambda/lambdaNaming/TestNonSerializableLambdaNameStability.java@51997141b15c (annotated)

test/tools/javac/lambda/lambdaNaming/TestNonSerializableLambdaNameStability.java

Wed, 16 Sep 2015 10:56:23 +0200

author: jlahoda
date: Wed, 16 Sep 2015 10:56:23 +0200
changeset 3111: 51997141b15c
parent 2701: 6906fc8bc514
permissions: -rw-r--r--

8067422: Lambda method names are unnecessarily unstable
Summary: Lambda method numbers are now assigned per class for non-serializable lambdas.
Reviewed-by: mcimadamore, rfield, vromero

 /*
  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 /*
  * @test
  * @bug 8067422
  * @summary Check that the lambda names are not unnecessarily unstable
  * @run main TestNonSerializableLambdaNameStability
  */
 import com.sun.tools.classfile.ClassFile;
 import com.sun.tools.classfile.Method;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import javax.tools.FileObject;
 import javax.tools.ForwardingJavaFileManager;
 import javax.tools.JavaCompiler;
 import javax.tools.JavaFileManager;
 import javax.tools.JavaFileObject;
 import javax.tools.JavaFileObject.Kind;
 import javax.tools.SimpleJavaFileObject;
 import javax.tools.ToolProvider;
 public class TestNonSerializableLambdaNameStability {
     public static void main(String... args) throws Exception {
         new TestNonSerializableLambdaNameStability().run();
     }
     String lambdaSource = "public class L%d {\n" +
                           "    public static class A {\n" +
                           "        private Runnable r = () -> { };\n" +
                           "    }\n" +
                           "    public static class B {\n" +
                           "        private Runnable r = () -> { };\n" +
                           "    }\n" +
                           "    private Runnable r = () -> { };\n" +
                           "}\n";
     String expectedLambdaMethodName = "lambda$new$0";
     void run() throws Exception {
         List<JavaFileObject> sources = new ArrayList<>();
         for (int i = 0; i < 3; i++) {
             sources.add(new SourceJavaFileObject("L" + i, String.format(lambdaSource, i)));
         }
         JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
         try (MemoryFileManager fm = new MemoryFileManager(compiler.getStandardFileManager(null, null, null))) {
             if (!compiler.getTask(null, fm, null, null, null, sources).call()) {
                 throw new AssertionError("Compilation failed!");
             }
             for (String file : fm.name2Content.keySet()) {
                 byte[] fileBytes = fm.name2Content.get(file);
                 try (InputStream in = new ByteArrayInputStream(fileBytes)) {
                     boolean foundLambdaMethod = false;
                     ClassFile cf = ClassFile.read(in);
                     StringBuilder seenMethods = new StringBuilder();
                     String sep = "";
                     for (Method m : cf.methods) {
                         String methodName = m.getName(cf.constant_pool);
                         if (expectedLambdaMethodName.equals(methodName)) {
                             foundLambdaMethod = true;
                             break;
                         }
                         seenMethods.append(sep);
                         seenMethods.append(methodName);
                         sep = ", ";
                     }
                     if (!foundLambdaMethod) {
                         throw new AbstractMethodError("Did not find the lambda method, " +
                                                       "found methods: " + seenMethods.toString());
                     }
                 }
             }
         }
     }
     class MemoryFileManager extends ForwardingJavaFileManager<JavaFileManager> {
         final Map<String, byte[]> name2Content = new HashMap<>();
         public MemoryFileManager(JavaFileManager fileManager) {
             super(fileManager);
         }
         @Override
         public JavaFileObject getJavaFileForOutput(Location location, String className, Kind kind, FileObject sibling) throws IOException {
             try {
                 return new SimpleJavaFileObject(new URI("mem://" + className.replace('.', '/') + kind.extension), kind) {
                     @Override public OutputStream openOutputStream() throws IOException {
                         return new ByteArrayOutputStream() {
                             @Override public void close() throws IOException {
                                 super.close();
                                 name2Content.put(className, toByteArray());
                             }
                         };
                     }
                 };
             } catch (URISyntaxException ex) {
                 throw new AssertionError(ex);
             }
         }
     }
     class SourceJavaFileObject extends SimpleJavaFileObject {
         private final String code;
         public SourceJavaFileObject(String name, String code) throws URISyntaxException {
             super(new URI("mem:///" + name + ".java"), Kind.SOURCE);
             this.code = code;
         }
         @Override
         public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
             return code;
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

test/tools/javac/lambda/lambdaNaming/TestNonSerializableLambdaNameStability.java@51997141b15c (annotated)

test/tools/javac/lambda/lambdaNaming/TestNonSerializableLambdaNameStability.java