| /* |
| * Copyright (c) 2010, 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 6337171 6996415 |
| * @ignore 6996758: Investigate better override bridges strategy |
| * @summary javac should create bridge methods when type variable bounds restricted |
| * @run main OverrideBridge |
| */ |
| |
| // fix, and test, has been disabled as a consequence of 6996415 |
| |
| import java.io.*; |
| import java.net.URI; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.HashMap; |
| import javax.tools.JavaCompiler; |
| import javax.tools.JavaFileObject; |
| import javax.tools.SimpleJavaFileObject; |
| import javax.tools.ToolProvider; |
| |
| import com.sun.source.util.JavacTask; |
| import com.sun.tools.classfile.ClassFile; |
| import com.sun.tools.classfile.ConstantPoolException; |
| import com.sun.tools.classfile.Descriptor.InvalidDescriptor; |
| import com.sun.tools.classfile.Method; |
| |
| public class OverrideBridge { |
| |
| enum Implementation { |
| IMPLICIT(""), |
| EXPLICIT("@Override public abstract X m(X x);"); |
| |
| String impl; |
| |
| Implementation(String impl) { |
| this.impl = impl; |
| } |
| } |
| |
| static class JavaSource extends SimpleJavaFileObject { |
| |
| final static String sourceStub = |
| "abstract class A<X> {\n" + |
| " public abstract X m(X x);\n" + |
| "}\n" + |
| "interface I<X> {\n" + |
| "X m(X x);\n" + |
| "}\n" + |
| "abstract class B<X extends B<X>> extends A<X> implements I<X> { #B }\n" + |
| "abstract class C<X extends C<X>> extends B<X> { #C }\n" + |
| "abstract class D<X extends D<X>> extends C<X> { #D }\n"; |
| |
| String source; |
| |
| public JavaSource(Implementation implB, Implementation implC, Implementation implD) { |
| super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE); |
| source = sourceStub.replace("#B", implB.impl).replace("#C", implC.impl).replace("#D", implD.impl); |
| } |
| |
| @Override |
| public CharSequence getCharContent(boolean ignoreEncodingErrors) { |
| return source; |
| } |
| } |
| |
| public static void main(String... args) throws Exception { |
| Map<ClassFile, List<Method>> refMembers = |
| compile(Implementation.EXPLICIT, Implementation.EXPLICIT, Implementation.EXPLICIT, "ref"); |
| int i = 0; |
| for (Implementation implB : Implementation.values()) { |
| for (Implementation implC : Implementation.values()) { |
| for (Implementation implD : Implementation.values()) { |
| Map<ClassFile, List<Method>> membersToCheck = compile(implB, implC, implD, "out_" + i++); |
| check(refMembers, membersToCheck); |
| } |
| } |
| } |
| } |
| |
| static String workDir = System.getProperty("user.dir"); |
| |
| static Map<ClassFile, List<Method>> compile(Implementation implB, Implementation implC, Implementation implD, String destPath) throws Exception { |
| File destDir = new File(workDir, destPath); destDir.mkdir(); |
| final JavaCompiler tool = ToolProvider.getSystemJavaCompiler(); |
| JavaSource source = new JavaSource(implB, implC, implD); |
| JavacTask ct = (JavacTask)tool.getTask(null, null, null, |
| Arrays.asList("-d", destPath), null, Arrays.asList(source)); |
| ct.generate(); |
| Map<ClassFile, List<Method>> members = new HashMap<>(); |
| addMembers(destDir, members); |
| return members; |
| } |
| |
| static void addMembers(File destDir, Map<ClassFile, List<Method>> members) { |
| String[] names = { "B.class", "C.class", "D.class" }; |
| try { |
| for (String name : names) { |
| File f = new File(destDir, name); |
| ClassFile cf = ClassFile.read(f); |
| members.put(cf, readMethod(cf, "m")); |
| } |
| } catch (Exception e) { |
| e.printStackTrace(); |
| throw new Error("error reading classes"); |
| } |
| } |
| |
| static List<Method> readMethod(ClassFile cf, String name) throws ConstantPoolException { |
| List<Method> buf = new ArrayList<>(); |
| for (Method m : cf.methods) { |
| if (m.getName(cf.constant_pool).equals(name)) { |
| buf.add(m); |
| } |
| } |
| return buf; |
| } |
| |
| static void check(Map<ClassFile, List<Method>> refMembers, Map<ClassFile, List<Method>> membersToCheck) throws ConstantPoolException, InvalidDescriptor { |
| for (Map.Entry<ClassFile, List<Method>> ref : refMembers.entrySet()) { |
| ClassFile cRef = ref.getKey(); |
| for (Method mRef : ref.getValue()) { |
| boolean ok = false; |
| for (Map.Entry<ClassFile, List<Method>> toCheck : membersToCheck.entrySet()) { |
| ClassFile cToCheck = toCheck.getKey(); |
| for (Method mToCheck : toCheck.getValue()) { |
| if (cRef.getName().equals(cToCheck.getName()) && |
| mRef.descriptor.getReturnType(cRef.constant_pool).equals( |
| mToCheck.descriptor.getReturnType(cToCheck.constant_pool)) && |
| mRef.descriptor.getParameterTypes(cRef.constant_pool).equals( |
| mToCheck.descriptor.getParameterTypes(cToCheck.constant_pool))) { |
| ok = true; |
| } |
| } |
| } |
| if (!ok) { |
| throw new AssertionError("Matching method descriptor for " + mRef.descriptor.getParameterTypes(cRef.constant_pool) + "not found"); |
| } |
| } |
| } |
| } |
| } |