TestSerializedLambdaNameStability.java revision 2586:a108029dbcbf 
1/*
2 * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/*
25 * @test
26 * @bug 8023668
27 * @summary Desugar serializable lambda bodies using more robust naming scheme
28 * @library /tools/lib
29 * @build ToolBox
30 * @run main TestSerializedLambdaNameStability
31 */
32
33import java.io.*;
34import java.lang.reflect.Constructor;
35import java.lang.reflect.InvocationTargetException;
36import java.lang.reflect.Method;
37import java.nio.file.*;
38
39public class TestSerializedLambdaNameStability {
40
41    final ClassLoader writingClassLoader;
42    final ClassLoader clonedClassLoader;
43    final ClassLoader checkingClassLoader;
44
45    TestSerializedLambdaNameStability()  {
46        writingClassLoader = new TestClassLoader("before");
47        clonedClassLoader = new TestClassLoader("before");
48        checkingClassLoader = new TestClassLoader("after");
49    }
50
51    public static void main(String... args) throws Exception {
52        new TestSerializedLambdaNameStability().doit("NameOfCapturedArgs", true);
53        new TestSerializedLambdaNameStability().doit("TypesOfCapturedArgs", true);
54        new TestSerializedLambdaNameStability().doit("OrderOfCapturedArgs", true);
55        new TestSerializedLambdaNameStability().doit("VariableAssignmentTarget", false);
56        new TestSerializedLambdaNameStability().doit("TargetName", true);
57        new TestSerializedLambdaNameStability().doit("TargetType", true);
58    }
59
60    public void doit(String name, boolean expectFail) throws Exception {
61        String iName = "I" + name;
62        String testName = "TEST" + name;
63        Class<?> kw = writingClassLoader.loadClass(testName);
64        Object instw = getInstance(kw);
65        Method mw = getMethod(kw, "write", ObjectOutput.class);
66        ByteArrayOutputStream baos = new ByteArrayOutputStream();
67        try (ObjectOutput out = new ObjectOutputStream(baos)) {
68            mw.invoke(instw, out);
69        }
70        byte[] ser = baos.toByteArray();
71
72        // Read and check clone
73        readCheck(iName, testName, clonedClassLoader, ser);
74        System.err.printf("cloned test readCheck %s\n", testName);
75
76        // Read and check other
77        if (expectFail) {
78            try {
79                readCheck(iName, testName, checkingClassLoader, ser);
80            } catch (InvocationTargetException ite) {
81                Throwable underlying = ite;
82                while (underlying != null && !(underlying instanceof IllegalArgumentException)) {
83                    underlying = underlying.getCause();
84                }
85                if (underlying != null) {
86                    if (underlying.getMessage().contains("deserialization")) {
87                        System.err.printf("PASS: other test %s got expected exception %s\n", testName, underlying);
88                        return;
89                    }
90                }
91                System.err.printf("FAIL: other test %s got unexpected exception %s\n", testName, ite);
92                throw new Exception("unexpected exception ", ite);
93            }
94            System.err.printf("FAIL: other test %s expected an exception", testName);
95            throw new Exception("expected an exception" + testName);
96        } else {
97            readCheck(iName, testName, checkingClassLoader, ser);
98            System.err.printf("PASS: other test %s readCheck\n", testName);
99        }
100    }
101
102    void readCheck(String iName, String testName, ClassLoader loader, byte[] ser) throws Exception {
103        Class<?> k = loader.loadClass(testName);
104        Object inst = getInstance(k);
105        Method mrc = getMethod(k, "readCheck", ObjectInput.class);
106        ByteArrayInputStream bais = new ByteArrayInputStream(ser);
107        try (ObjectInput in = new ObjectInputStream(bais)) {
108            mrc.invoke(inst, in);
109        }
110    }
111
112    Method getMethod(Class<?> k, String name, Class<?> argTypes) throws Exception {
113        Method meth = k.getDeclaredMethod(name, argTypes);
114        meth.setAccessible(true);
115        return meth;
116    }
117
118    Object getInstance(Class<?> k) throws Exception {
119        Constructor<?> cons = k.getConstructors()[0];
120        cons.setAccessible(true);
121        return cons.newInstance();
122    }
123
124    static class TestClassLoader extends ClassLoader  {
125        static final String compiledDir = System.getProperty("user.dir");
126        static final String sourceBaseDir = System.getProperty("test.src");
127
128        final ToolBox tb = new ToolBox();
129        final String context;
130
131        public TestClassLoader(String context) {
132            super();
133            this.context = context;
134        }
135
136        @Override
137        public Class findClass(String name) throws ClassNotFoundException {
138            byte[] b;
139
140            try {
141                b = loadClassData(name);
142            } catch (Throwable th) {
143                // th.printStackTrace();
144                throw new ClassNotFoundException("Loading error", th);
145            }
146            return defineClass(name, b, 0, b.length);
147        }
148
149        private byte[] loadClassData(String name) throws Exception {
150            String srcName;
151            if (name.startsWith("TEST"))
152                srcName = name;
153            else if (name.startsWith("I"))
154                srcName = "TEST" + name.substring(1);
155            else
156                throw new Exception("Did not expect to load " + name);
157            Path srcFile = Paths.get(sourceBaseDir, context, srcName + ".java");
158            tb.new JavacTask()
159                    .outdir(compiledDir)
160                    .files(srcFile)
161                    .run();
162            Path cfFile = Paths.get(compiledDir, name + ".class");
163            byte[] bytes = Files.readAllBytes(cfFile);
164            return bytes;
165        }
166    }
167}
168