mcimadamore@673: /*
jjg@1721:  * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
mcimadamore@673:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
mcimadamore@673:  *
mcimadamore@673:  * This code is free software; you can redistribute it and/or modify it
mcimadamore@673:  * under the terms of the GNU General Public License version 2 only, as
mcimadamore@673:  * published by the Free Software Foundation.
mcimadamore@673:  *
mcimadamore@673:  * This code is distributed in the hope that it will be useful, but WITHOUT
mcimadamore@673:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
mcimadamore@673:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
mcimadamore@673:  * version 2 for more details (a copy is included in the LICENSE file that
mcimadamore@673:  * accompanied this code).
mcimadamore@673:  *
mcimadamore@673:  * You should have received a copy of the GNU General Public License version
mcimadamore@673:  * 2 along with this work; if not, write to the Free Software Foundation,
mcimadamore@673:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
mcimadamore@673:  *
mcimadamore@673:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
mcimadamore@673:  * or visit www.oracle.com if you need additional information or have any
mcimadamore@673:  * questions.
mcimadamore@673:  */
mcimadamore@673: 
mcimadamore@673: /*
mcimadamore@673:  * @test
mcimadamore@730:  * @bug 6337171 6996415
jjg@1721:  * @ignore 6996758: Investigate better override bridges strategy
mcimadamore@673:  * @summary  javac should create bridge methods when type variable bounds restricted
mcimadamore@673:  * @run main OverrideBridge
mcimadamore@673:  */
mcimadamore@673: 
jjg@1721: // fix, and test, has been disabled as a consequence of 6996415
jjg@1721: 
mcimadamore@673: import java.io.*;
mcimadamore@673: import java.net.URI;
mcimadamore@673: import java.util.ArrayList;
mcimadamore@673: import java.util.Arrays;
mcimadamore@673: import java.util.List;
mcimadamore@673: import java.util.Map;
mcimadamore@673: import java.util.HashMap;
mcimadamore@673: import javax.tools.JavaCompiler;
mcimadamore@673: import javax.tools.JavaFileObject;
mcimadamore@673: import javax.tools.SimpleJavaFileObject;
mcimadamore@673: import javax.tools.ToolProvider;
mcimadamore@673: 
mcimadamore@673: import com.sun.source.util.JavacTask;
mcimadamore@673: import com.sun.tools.classfile.ClassFile;
mcimadamore@673: import com.sun.tools.classfile.ConstantPoolException;
mcimadamore@673: import com.sun.tools.classfile.Descriptor.InvalidDescriptor;
mcimadamore@673: import com.sun.tools.classfile.Method;
mcimadamore@673: 
mcimadamore@673: public class OverrideBridge {
mcimadamore@673: 
mcimadamore@673:     enum Implementation {
mcimadamore@673:         IMPLICIT(""),
mcimadamore@673:         EXPLICIT("@Override public abstract X m(X x);");
mcimadamore@673: 
mcimadamore@673:         String impl;
mcimadamore@673: 
mcimadamore@673:         Implementation(String impl) {
mcimadamore@673:             this.impl = impl;
mcimadamore@673:         }
mcimadamore@673:     }
mcimadamore@673: 
mcimadamore@673:     static class JavaSource extends SimpleJavaFileObject {
mcimadamore@673: 
mcimadamore@673:         final static String sourceStub =
mcimadamore@673:                         "abstract class A<X> {\n" +
mcimadamore@673:                         "   public abstract X m(X x);\n" +
mcimadamore@673:                         "}\n" +
mcimadamore@673:                         "interface I<X> {\n" +
mcimadamore@673:                         "X m(X x);\n" +
mcimadamore@673:                         "}\n" +
mcimadamore@673:                         "abstract class B<X extends B<X>> extends A<X> implements I<X> { #B }\n" +
mcimadamore@673:                         "abstract class C<X extends C<X>> extends B<X>  { #C }\n" +
mcimadamore@673:                         "abstract class D<X extends D<X>> extends C<X>  { #D }\n";
mcimadamore@673: 
mcimadamore@673:         String source;
mcimadamore@673: 
mcimadamore@673:         public JavaSource(Implementation implB, Implementation implC, Implementation implD) {
mcimadamore@673:             super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
mcimadamore@673:             source = sourceStub.replace("#B", implB.impl).replace("#C", implC.impl).replace("#D", implD.impl);
mcimadamore@673:         }
mcimadamore@673: 
mcimadamore@673:         @Override
mcimadamore@673:         public CharSequence getCharContent(boolean ignoreEncodingErrors) {
mcimadamore@673:             return source;
mcimadamore@673:         }
mcimadamore@673:     }
mcimadamore@673: 
mcimadamore@673:     public static void main(String... args) throws Exception {
mcimadamore@673:         Map<ClassFile, List<Method>> refMembers =
mcimadamore@673:                 compile(Implementation.EXPLICIT, Implementation.EXPLICIT, Implementation.EXPLICIT, "ref");
mcimadamore@673:         int i = 0;
mcimadamore@673:         for (Implementation implB : Implementation.values()) {
mcimadamore@673:             for (Implementation implC : Implementation.values()) {
mcimadamore@673:                 for (Implementation implD : Implementation.values()) {
mcimadamore@673:                     Map<ClassFile, List<Method>> membersToCheck = compile(implB, implC, implD, "out_" + i++);
mcimadamore@673:                     check(refMembers, membersToCheck);
mcimadamore@673:                 }
mcimadamore@673:             }
mcimadamore@673:         }
mcimadamore@673:     }
mcimadamore@673: 
mcimadamore@673:     static String workDir = System.getProperty("user.dir");
mcimadamore@673: 
mcimadamore@673:     static Map<ClassFile, List<Method>> compile(Implementation implB, Implementation implC, Implementation implD, String destPath) throws Exception {
mcimadamore@673:         File destDir = new File(workDir, destPath); destDir.mkdir();
mcimadamore@673:         final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
mcimadamore@673:         JavaSource source = new JavaSource(implB, implC, implD);
mcimadamore@673:         JavacTask ct = (JavacTask)tool.getTask(null, null, null,
mcimadamore@673:                 Arrays.asList("-d", destPath), null, Arrays.asList(source));
mcimadamore@673:         ct.generate();
mcimadamore@673:         Map<ClassFile, List<Method>> members = new HashMap<>();
mcimadamore@673:         addMembers(destDir, members);
mcimadamore@673:         return members;
mcimadamore@673:     }
mcimadamore@673: 
mcimadamore@673:     static void addMembers(File destDir, Map<ClassFile, List<Method>> members) {
mcimadamore@673:         String[] names = { "B.class", "C.class", "D.class" };
mcimadamore@673:         try {
mcimadamore@673:             for (String name : names) {
mcimadamore@673:                 File f = new File(destDir, name);
mcimadamore@673:                 ClassFile cf = ClassFile.read(f);
mcimadamore@673:                 members.put(cf, readMethod(cf, "m"));
mcimadamore@673:             }
mcimadamore@673:         } catch (Exception e) {
mcimadamore@673:             e.printStackTrace();
mcimadamore@673:             throw new Error("error reading classes");
mcimadamore@673:         }
mcimadamore@673:     }
mcimadamore@673: 
mcimadamore@673:     static List<Method> readMethod(ClassFile cf, String name) throws ConstantPoolException {
mcimadamore@673:         List<Method> buf = new ArrayList<>();
mcimadamore@673:         for (Method m : cf.methods) {
mcimadamore@673:             if (m.getName(cf.constant_pool).equals(name)) {
mcimadamore@673:                 buf.add(m);
mcimadamore@673:             }
mcimadamore@673:         }
mcimadamore@673:         return buf;
mcimadamore@673:     }
mcimadamore@673: 
mcimadamore@673:     static void check(Map<ClassFile, List<Method>> refMembers, Map<ClassFile, List<Method>> membersToCheck) throws ConstantPoolException, InvalidDescriptor {
mcimadamore@673:         for (Map.Entry<ClassFile, List<Method>> ref : refMembers.entrySet()) {
mcimadamore@673:             ClassFile cRef = ref.getKey();
mcimadamore@673:             for (Method mRef : ref.getValue()) {
mcimadamore@673:                 boolean ok = false;
mcimadamore@673:                 for (Map.Entry<ClassFile, List<Method>> toCheck : membersToCheck.entrySet()) {
mcimadamore@673:                     ClassFile cToCheck = toCheck.getKey();
mcimadamore@673:                     for (Method mToCheck : toCheck.getValue()) {
mcimadamore@673:                         if (cRef.getName().equals(cToCheck.getName()) &&
mcimadamore@673:                                 mRef.descriptor.getReturnType(cRef.constant_pool).equals(
mcimadamore@673:                                 mToCheck.descriptor.getReturnType(cToCheck.constant_pool)) &&
mcimadamore@673:                                 mRef.descriptor.getParameterTypes(cRef.constant_pool).equals(
mcimadamore@673:                                 mToCheck.descriptor.getParameterTypes(cToCheck.constant_pool))) {
mcimadamore@673:                             ok = true;
mcimadamore@673:                         }
mcimadamore@673:                     }
mcimadamore@673:                 }
mcimadamore@673:                 if (!ok) {
mcimadamore@673:                     throw new AssertionError("Matching method descriptor for " + mRef.descriptor.getParameterTypes(cRef.constant_pool) + "not found");
mcimadamore@673:                 }
mcimadamore@673:             }
mcimadamore@673:         }
mcimadamore@673:     }
mcimadamore@673: }