8023668: Desugar serializable lambda bodies using more robust naming scheme

Lambda / bridged method-reference naming overhaul

Reviewed-by: ksrini, briangoetz

langtools/test/tools/javac/lambda/lambdaNaming/TestSerializedLambdaNameStability.java

@@ -0,0 +1,166 @@
+/*
+ * Copyright (c) 2013, 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 8023668
+ * @summary Desugar serializable lambda bodies using more robust naming scheme
+ * @library /tools/javac/lib
+ * @build ToolBox
+ * @run main TestSerializedLambdaNameStability
+ */
+
+import java.io.*;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.nio.file.*;
+
+public class TestSerializedLambdaNameStability {
+
+    final ClassLoader writingClassLoader;
+    final ClassLoader clonedClassLoader;
+    final ClassLoader checkingClassLoader;
+
+    TestSerializedLambdaNameStability()  {
+        writingClassLoader = new TestClassLoader("before");
+        clonedClassLoader = new TestClassLoader("before");
+        checkingClassLoader = new TestClassLoader("after");
+    }
+
+    public static void main(String... args) throws Exception {
+        new TestSerializedLambdaNameStability().doit("NameOfCapturedArgs", true);
+        new TestSerializedLambdaNameStability().doit("TypesOfCapturedArgs", true);
+        new TestSerializedLambdaNameStability().doit("OrderOfCapturedArgs", true);
+        new TestSerializedLambdaNameStability().doit("VariableAssignmentTarget", false);
+        new TestSerializedLambdaNameStability().doit("TargetName", true);
+        new TestSerializedLambdaNameStability().doit("TargetType", true);
+    }
+
+    public void doit(String name, boolean expectFail) throws Exception {
+        String iName = "I" + name;
+        String testName = "TEST" + name;
+        Class<?> kw = writingClassLoader.loadClass(testName);
+        Object instw = getInstance(kw);
+        Method mw = getMethod(kw, "write", ObjectOutput.class);
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        try (ObjectOutput out = new ObjectOutputStream(baos)) {
+            mw.invoke(instw, out);
+        }
+        byte[] ser = baos.toByteArray();
+
+        // Read and check clone
+        readCheck(iName, testName, clonedClassLoader, ser);
+        System.err.printf("cloned test readCheck %s\n", testName);
+
+        // Read and check other
+        if (expectFail) {
+            try {
+                readCheck(iName, testName, checkingClassLoader, ser);
+            } catch (InvocationTargetException ite) {
+                Throwable underlying = ite;
+                while (underlying != null && !(underlying instanceof IllegalArgumentException)) {
+                    underlying = underlying.getCause();
+                }
+                if (underlying != null) {
+                    if (underlying.getMessage().contains("deserialization")) {
+                        System.err.printf("PASS: other test %s got expected exception %s\n", testName, underlying);
+                        return;
+                    }
+                }
+                System.err.printf("FAIL: other test %s got unexpected exception %s\n", testName, ite);
+                throw new Exception("unexpected exception ", ite);
+            }
+            System.err.printf("FAIL: other test %s expected an exception", testName);
+            throw new Exception("expected an exception" + testName);
+        } else {
+            readCheck(iName, testName, checkingClassLoader, ser);
+            System.err.printf("PASS: other test %s readCheck\n", testName);
+        }
+    }
+
+    void readCheck(String iName, String testName, ClassLoader loader, byte[] ser) throws Exception {
+        Class<?> k = loader.loadClass(testName);
+        Object inst = getInstance(k);
+        Method mrc = getMethod(k, "readCheck", ObjectInput.class);
+        ByteArrayInputStream bais = new ByteArrayInputStream(ser);
+        try (ObjectInput in = new ObjectInputStream(bais)) {
+            mrc.invoke(inst, in);
+        }
+    }
+
+    Method getMethod(Class<?> k, String name, Class<?> argTypes) throws Exception {
+        Method meth = k.getDeclaredMethod(name, argTypes);
+        meth.setAccessible(true);
+        return meth;
+    }
+
+    Object getInstance(Class<?> k) throws Exception {
+        Constructor<?> cons = k.getConstructors()[0];
+        cons.setAccessible(true);
+        return cons.newInstance();
+    }
+
+    static class TestClassLoader extends ClassLoader  {
+        static final String compiledDir = System.getProperty("user.dir");
+        static final String sourceBaseDir = System.getProperty("test.src");
+
+        final String context;
+
+        public TestClassLoader(String context) {
+            super();
+            this.context = context;
+        }
+
+        @Override
+        public Class findClass(String name) throws ClassNotFoundException {
+            byte[] b;
+
+            try {
+                b = loadClassData(name);
+            } catch (Throwable th) {
+                // th.printStackTrace();
+                throw new ClassNotFoundException("Loading error", th);
+            }
+            return defineClass(name, b, 0, b.length);
+        }
+
+        private byte[] loadClassData(String name) throws Exception {
+            String srcName;
+            if (name.startsWith("TEST"))
+                srcName = name;
+            else if (name.startsWith("I"))
+                srcName = "TEST" + name.substring(1);
+            else
+                throw new Exception("Did not expect to load " + name);
+            Path srcFile = Paths.get(sourceBaseDir, context, srcName + ".java");
+            String testSource = new String(Files.readAllBytes(srcFile));
+            ToolBox.JavaToolArgs javacSuccessArgs =
+                    new ToolBox.JavaToolArgs().setSources(testSource);
+            ToolBox.javac(javacSuccessArgs);
+            Path cfFile = Paths.get(compiledDir, name + ".class");
+            byte[] bytes = Files.readAllBytes(cfFile);
+            return bytes;
+        }
+    }
+}