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

 /*

  * Copyright (c) 2006, 2011, 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

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  */

 /*

  * @test

  * @bug     6418666 6423973 6453386 7025809

  * @summary Test the NoTypes: VOID, PACKAGE, NONE

  * @author  Scott Seligman

  * @library /tools/javac/lib

  * @build JavacTestingAbstractProcessor

  * @compile -g NoTypes.java

  * @compile -processor NoTypes -proc:only NoTypes.java

  */

 import java.util.Set;

 import javax.annotation.processing.*;

 import javax.lang.model.SourceVersion;

 import javax.lang.model.element.*;

 import javax.lang.model.type.*;

 import javax.lang.model.util.*;

 import static javax.lang.model.type.TypeKind.*;

 public class NoTypes extends JavacTestingAbstractProcessor {

     public boolean process(Set<? extends TypeElement> annoTypes,

                            RoundEnvironment round) {

         if (!round.processingOver())

             doit(annoTypes, round);

         return true;

     }

     private void doit(Set<? extends TypeElement> annoTypes,

                       RoundEnvironment round) {

         // The superclass of Object is NONE.

         TypeElement object = elements.getTypeElement("java.lang.Object");

         verifyKind(NONE, object.getSuperclass());

         // The enclosing type of a top-level class is NONE

         verifyKind(NONE, ((DeclaredType)object.asType()).getEnclosingType());

         // The superclass of an interface is NONE.

         TypeElement i = elements.getTypeElement("NoTypes.I");

         verifyKind(NONE, i.getSuperclass());

         // The type of a package is PACKAGE.

         Element pkg = i.getEnclosingElement().getEnclosingElement();

         verifyKind(PACKAGE, pkg.asType());

         // A package isn't enclosed.  Not yet, anyway.

         if (pkg.getEnclosingElement() != null)

             throw new AssertionError();

         verifyKind(VOID, types.getNoType(VOID));

         verifyKind(NONE, types.getNoType(NONE));

         // The return type of a constructor or void method is VOID.

         class Scanner extends ElementScanner<Void, Void> {

             @Override

             public Void visitExecutable(ExecutableElement e, Void p) {

                 verifyKind(VOID, e.getReturnType());

                 ExecutableType t = (ExecutableType) e.asType();

                 verifyKind(VOID, t.getReturnType());

                 return null;

             }

         }

         TypeElement c = elements.getTypeElement("NoTypes.C");

         new Scanner().scan(c);

     }

     /**

      * Verify that a NoType instance is of a particular kind, and that

      * the latest TypeKindVisitor properly dispatches on it.

      */

     private void verifyKind(TypeKind kind, TypeMirror type) {

         class Vis extends TypeKindVisitor<TypeKind, Void> {

             @Override

             public TypeKind visitNoTypeAsVoid(NoType t, Void p) {

                 return VOID;

             }

             @Override

             public TypeKind visitNoTypeAsPackage(NoType t, Void p) {

                 return PACKAGE;

             }

             @Override

             public TypeKind visitNoTypeAsNone(NoType t, Void p) {

                 return NONE;

             }

         }

         if (kind != type.getKind() || kind != new Vis().visit(type))

             throw new AssertionError();

     }

     // Fodder for the tests

     interface I {

     }

     class C {

         C() {}

         void m() {}

     }

 }