Mercurial > jdk8-mips64-public > langtools / file comparison

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

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

changeset 2701
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2700:7da8b9de43a8 2701:6906fc8bc514
1 /*
2 * Copyright (c) 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 8067422
27 * @summary Check that the lambda names are not unnecessarily unstable
28 * @run main TestNonSerializableLambdaNameStability
29 */
30
31 import com.sun.tools.classfile.ClassFile;
32 import com.sun.tools.classfile.Method;
33
34 import java.io.ByteArrayInputStream;
35 import java.io.ByteArrayOutputStream;
36 import java.io.IOException;
37 import java.io.InputStream;
38 import java.io.OutputStream;
39 import java.net.URI;
40 import java.net.URISyntaxException;
41 import java.util.ArrayList;
42 import java.util.HashMap;
43 import java.util.List;
44 import java.util.Map;
45
46 import javax.tools.FileObject;
47 import javax.tools.ForwardingJavaFileManager;
48 import javax.tools.JavaCompiler;
49 import javax.tools.JavaFileManager;
50 import javax.tools.JavaFileObject;
51 import javax.tools.JavaFileObject.Kind;
52 import javax.tools.SimpleJavaFileObject;
53 import javax.tools.ToolProvider;
54
55 public class TestNonSerializableLambdaNameStability {
56
57 public static void main(String... args) throws Exception {
58 new TestNonSerializableLambdaNameStability().run();
59 }
60
61 String lambdaSource = "public class L%d {\n" +
62 " public static class A {\n" +
63 " private Runnable r = () -> { };\n" +
64 " }\n" +
65 " public static class B {\n" +
66 " private Runnable r = () -> { };\n" +
67 " }\n" +
68 " private Runnable r = () -> { };\n" +
69 "}\n";
70
71 String expectedLambdaMethodName = "lambda$new$0";
72
73 void run() throws Exception {
74 List<JavaFileObject> sources = new ArrayList<>();
75
76 for (int i = 0; i < 3; i++) {
77 sources.add(new SourceJavaFileObject("L" + i, String.format(lambdaSource, i)));
78 }
79
80 JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
81
82 try (MemoryFileManager fm = new MemoryFileManager(compiler.getStandardFileManager(null, null, null))) {
83 if (!compiler.getTask(null, fm, null, null, null, sources).call()) {
84 throw new AssertionError("Compilation failed!");
85 }
86
87 for (String file : fm.name2Content.keySet()) {
88 byte[] fileBytes = fm.name2Content.get(file);
89 try (InputStream in = new ByteArrayInputStream(fileBytes)) {
90 boolean foundLambdaMethod = false;
91 ClassFile cf = ClassFile.read(in);
92 StringBuilder seenMethods = new StringBuilder();
93 String sep = "";
94 for (Method m : cf.methods) {
95 String methodName = m.getName(cf.constant_pool);
96 if (expectedLambdaMethodName.equals(methodName)) {
97 foundLambdaMethod = true;
98 break;
99 }
100 seenMethods.append(sep);
101 seenMethods.append(methodName);
102 sep = ", ";
103 }
104
105 if (!foundLambdaMethod) {
106 throw new AbstractMethodError("Did not find the lambda method, " +
107 "found methods: " + seenMethods.toString());
108 }
109 }
110 }
111 }
112 }
113
114 class MemoryFileManager extends ForwardingJavaFileManager<JavaFileManager> {
115
116 final Map<String, byte[]> name2Content = new HashMap<>();
117
118 public MemoryFileManager(JavaFileManager fileManager) {
119 super(fileManager);
120 }
121
122 @Override
123 public JavaFileObject getJavaFileForOutput(Location location, String className, Kind kind, FileObject sibling) throws IOException {
124 try {
125 return new SimpleJavaFileObject(new URI("mem://" + className.replace('.', '/') + kind.extension), kind) {
126 @Override public OutputStream openOutputStream() throws IOException {
127 return new ByteArrayOutputStream() {
128 @Override public void close() throws IOException {
129 super.close();
130 name2Content.put(className, toByteArray());
131 }
132 };
133 }
134 };
135 } catch (URISyntaxException ex) {
136 throw new AssertionError(ex);
137 }
138 }
139
140 }
141
142 class SourceJavaFileObject extends SimpleJavaFileObject {
143
144 private final String code;
145
146 public SourceJavaFileObject(String name, String code) throws URISyntaxException {
147 super(new URI("mem:///" + name + ".java"), Kind.SOURCE);
148 this.code = code;
149 }
150
151 @Override
152 public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
153 return code;
154 }
155
156 }
157 }

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