| /* |
| * Copyright (c) 2014, 2015, 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 |
| * @library /tools/lib |
| * @modules jdk.jdeps/com.sun.tools.classfile |
| * jdk.compiler/com.sun.tools.javac.api |
| * jdk.compiler/com.sun.tools.javac.file |
| * jdk.compiler/com.sun.tools.javac.main |
| * jdk.jdeps/com.sun.tools.javap |
| * @build ToolBox |
| * @run main TestNonSerializableLambdaNameStability |
| */ |
| |
| import com.sun.tools.classfile.ClassFile; |
| import com.sun.tools.classfile.Method; |
| import java.io.ByteArrayInputStream; |
| import java.io.InputStream; |
| import java.util.ArrayList; |
| import java.util.List; |
| import javax.tools.StandardLocation; |
| |
| 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<String> sources = new ArrayList<>(); |
| |
| for (int i = 0; i < 3; i++) { |
| sources.add(String.format(lambdaSource, i)); |
| } |
| |
| ToolBox tb = new ToolBox(); |
| |
| try (ToolBox.MemoryFileManager fm = new ToolBox.MemoryFileManager()) { |
| tb.new JavacTask() |
| .sources(sources.toArray(new String[sources.size()])) |
| .fileManager(fm) |
| .run(); |
| |
| for (String file : fm.files.get(StandardLocation.CLASS_OUTPUT).keySet()) { |
| byte[] fileBytes = fm.getFileBytes(StandardLocation.CLASS_OUTPUT, 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()); |
| } |
| } |
| } |
| } |
| } |
| } |