Thu, 10 Oct 2013 14:58:04 +0200
8001931: The new build system whitespace cleanup
Reviewed-by: tbell, simonis, erikj
1 /*
2 * Copyright (c) 2010, 2013, 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 */
24 /*
25 * @test
26 * @bug 6337171 6996415
27 * @ignore 6996758: Investigate better override bridges strategy
28 * @summary javac should create bridge methods when type variable bounds restricted
29 * @run main OverrideBridge
30 */
32 // fix, and test, has been disabled as a consequence of 6996415
34 import java.io.*;
35 import java.net.URI;
36 import java.util.ArrayList;
37 import java.util.Arrays;
38 import java.util.List;
39 import java.util.Map;
40 import java.util.HashMap;
41 import javax.tools.JavaCompiler;
42 import javax.tools.JavaFileObject;
43 import javax.tools.SimpleJavaFileObject;
44 import javax.tools.ToolProvider;
46 import com.sun.source.util.JavacTask;
47 import com.sun.tools.classfile.ClassFile;
48 import com.sun.tools.classfile.ConstantPoolException;
49 import com.sun.tools.classfile.Descriptor.InvalidDescriptor;
50 import com.sun.tools.classfile.Method;
52 public class OverrideBridge {
54 enum Implementation {
55 IMPLICIT(""),
56 EXPLICIT("@Override public abstract X m(X x);");
58 String impl;
60 Implementation(String impl) {
61 this.impl = impl;
62 }
63 }
65 static class JavaSource extends SimpleJavaFileObject {
67 final static String sourceStub =
68 "abstract class A<X> {\n" +
69 " public abstract X m(X x);\n" +
70 "}\n" +
71 "interface I<X> {\n" +
72 "X m(X x);\n" +
73 "}\n" +
74 "abstract class B<X extends B<X>> extends A<X> implements I<X> { #B }\n" +
75 "abstract class C<X extends C<X>> extends B<X> { #C }\n" +
76 "abstract class D<X extends D<X>> extends C<X> { #D }\n";
78 String source;
80 public JavaSource(Implementation implB, Implementation implC, Implementation implD) {
81 super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
82 source = sourceStub.replace("#B", implB.impl).replace("#C", implC.impl).replace("#D", implD.impl);
83 }
85 @Override
86 public CharSequence getCharContent(boolean ignoreEncodingErrors) {
87 return source;
88 }
89 }
91 public static void main(String... args) throws Exception {
92 Map<ClassFile, List<Method>> refMembers =
93 compile(Implementation.EXPLICIT, Implementation.EXPLICIT, Implementation.EXPLICIT, "ref");
94 int i = 0;
95 for (Implementation implB : Implementation.values()) {
96 for (Implementation implC : Implementation.values()) {
97 for (Implementation implD : Implementation.values()) {
98 Map<ClassFile, List<Method>> membersToCheck = compile(implB, implC, implD, "out_" + i++);
99 check(refMembers, membersToCheck);
100 }
101 }
102 }
103 }
105 static String workDir = System.getProperty("user.dir");
107 static Map<ClassFile, List<Method>> compile(Implementation implB, Implementation implC, Implementation implD, String destPath) throws Exception {
108 File destDir = new File(workDir, destPath); destDir.mkdir();
109 final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
110 JavaSource source = new JavaSource(implB, implC, implD);
111 JavacTask ct = (JavacTask)tool.getTask(null, null, null,
112 Arrays.asList("-d", destPath), null, Arrays.asList(source));
113 ct.generate();
114 Map<ClassFile, List<Method>> members = new HashMap<>();
115 addMembers(destDir, members);
116 return members;
117 }
119 static void addMembers(File destDir, Map<ClassFile, List<Method>> members) {
120 String[] names = { "B.class", "C.class", "D.class" };
121 try {
122 for (String name : names) {
123 File f = new File(destDir, name);
124 ClassFile cf = ClassFile.read(f);
125 members.put(cf, readMethod(cf, "m"));
126 }
127 } catch (Exception e) {
128 e.printStackTrace();
129 throw new Error("error reading classes");
130 }
131 }
133 static List<Method> readMethod(ClassFile cf, String name) throws ConstantPoolException {
134 List<Method> buf = new ArrayList<>();
135 for (Method m : cf.methods) {
136 if (m.getName(cf.constant_pool).equals(name)) {
137 buf.add(m);
138 }
139 }
140 return buf;
141 }
143 static void check(Map<ClassFile, List<Method>> refMembers, Map<ClassFile, List<Method>> membersToCheck) throws ConstantPoolException, InvalidDescriptor {
144 for (Map.Entry<ClassFile, List<Method>> ref : refMembers.entrySet()) {
145 ClassFile cRef = ref.getKey();
146 for (Method mRef : ref.getValue()) {
147 boolean ok = false;
148 for (Map.Entry<ClassFile, List<Method>> toCheck : membersToCheck.entrySet()) {
149 ClassFile cToCheck = toCheck.getKey();
150 for (Method mToCheck : toCheck.getValue()) {
151 if (cRef.getName().equals(cToCheck.getName()) &&
152 mRef.descriptor.getReturnType(cRef.constant_pool).equals(
153 mToCheck.descriptor.getReturnType(cToCheck.constant_pool)) &&
154 mRef.descriptor.getParameterTypes(cRef.constant_pool).equals(
155 mToCheck.descriptor.getParameterTypes(cToCheck.constant_pool))) {
156 ok = true;
157 }
158 }
159 }
160 if (!ok) {
161 throw new AssertionError("Matching method descriptor for " + mRef.descriptor.getParameterTypes(cRef.constant_pool) + "not found");
162 }
163 }
164 }
165 }
166 }