109 lines
4.1 KiB
Java
109 lines
4.1 KiB
Java
/*
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* Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8067422
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* @summary Check that the lambda names are not unnecessarily unstable
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* @library /tools/lib
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* @enablePreview
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* @modules java.base/jdk.internal.classfile.impl
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* jdk.compiler/com.sun.tools.javac.api
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* jdk.compiler/com.sun.tools.javac.main
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* jdk.jdeps/com.sun.tools.javap
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* @build toolbox.ToolBox toolbox.JavacTask
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* @run main TestNonSerializableLambdaNameStability
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*/
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import java.io.ByteArrayInputStream;
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import java.io.InputStream;
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import java.util.ArrayList;
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import java.util.List;
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import javax.tools.StandardLocation;
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import java.lang.classfile.*;
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import toolbox.JavacTask;
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import toolbox.ToolBox;
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public class TestNonSerializableLambdaNameStability {
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public static void main(String... args) throws Exception {
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new TestNonSerializableLambdaNameStability().run();
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}
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String lambdaSource = "public class L%d {\n" +
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" public static class A {\n" +
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" private Runnable r = () -> { };\n" +
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" }\n" +
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" public static class B {\n" +
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" private Runnable r = () -> { };\n" +
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" }\n" +
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" private Runnable r = () -> { };\n" +
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"}\n";
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String expectedLambdaMethodName = "lambda$new$0";
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void run() throws Exception {
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List<String> sources = new ArrayList<>();
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for (int i = 0; i < 3; i++) {
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sources.add(String.format(lambdaSource, i));
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}
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ToolBox tb = new ToolBox();
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try (ToolBox.MemoryFileManager fm = new ToolBox.MemoryFileManager()) {
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new JavacTask(tb)
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.sources(sources.toArray(new String[sources.size()]))
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.fileManager(fm)
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.run();
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for (String file : fm.getFileNames(StandardLocation.CLASS_OUTPUT)) {
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byte[] fileBytes = fm.getFileBytes(StandardLocation.CLASS_OUTPUT, file);
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try (InputStream in = new ByteArrayInputStream(fileBytes)) {
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boolean foundLambdaMethod = false;
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ClassModel cf = ClassFile.of().parse(in.readAllBytes());
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StringBuilder seenMethods = new StringBuilder();
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String sep = "";
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for (MethodModel m : cf.methods()) {
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String methodName = m.methodName().stringValue();
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if (expectedLambdaMethodName.equals(methodName)) {
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foundLambdaMethod = true;
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break;
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}
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seenMethods.append(sep);
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seenMethods.append(methodName);
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sep = ", ";
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}
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if (!foundLambdaMethod) {
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throw new AbstractMethodError("Did not find the lambda method, " +
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"found methods: " + seenMethods.toString());
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}
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}
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}
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}
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}
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}
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