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

 /*

  * Copyright (c) 2010, 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

  * questions.

  */

 /*

  * @test

  * @bug  6911256 6964740 6967842 6961571

  * @summary Test that the resource variable kind is appropriately set

  * @author  Joseph D. Darcy

  * @library ../../../lib

  * @build   JavacTestingAbstractProcessor TestResourceVariable

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

  */

 import java.io.*;

 import javax.annotation.processing.*;

 import javax.lang.model.*;

 import javax.lang.model.element.*;

 import javax.lang.model.type.*;

 import javax.lang.model.util.*;

 import java.util.*;

 import com.sun.source.tree.*;

 import com.sun.source.util.*;

 import static javax.tools.Diagnostic.Kind.*;

 /**

  * Using the tree API, retrieve element representations of the

  * resource of an ARM block and verify their kind tags are set

  * appropriately.

  */

 public class TestResourceVariable extends JavacTestingAbstractProcessor implements AutoCloseable {

     int resourceVariableCount = 0;

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

                           RoundEnvironment roundEnv) {

        if (!roundEnv.processingOver()) {

            Trees trees = Trees.instance(processingEnv);

            for(Element rootElement : roundEnv.getRootElements()) {

                TreePath treePath = trees.getPath(rootElement);

                (new ResourceVariableScanner(trees)).

                    scan(trees.getTree(rootElement),

                         treePath.getCompilationUnit());

            }

            if (resourceVariableCount != 3)

                throw new RuntimeException("Bad resource variable count " +

                                           resourceVariableCount);

        }

        return true;

     }

     @Override

     public void close() {}

     private void test1() {

         try(TestResourceVariable trv = this) {}

     }

     private void test2() {

         try(TestResourceVariable trv1 = this; TestResourceVariable trv2 = trv1) {}

     }

     /**

      * Verify that a resource variable modeled as an element behaves

      * as expected under 6 and 7 specific visitors.

      */

     private static void testResourceVariable(Element element) {

         ElementVisitor visitor6 = new ElementKindVisitor6<Void, Void>() {};

         try {

             visitor6.visit(element);

             throw new RuntimeException("Expected UnknownElementException not thrown.");

         } catch (UnknownElementException uee) {

             ; // Expected.

         }

         ElementKindVisitor7 visitor7 = new ElementKindVisitor7<Object, Void>() {

             @Override

             public Object visitVariableAsResourceVariable(VariableElement e,

                                                           Void p) {

                 return e; // a non-null value

             }

         };

         if (visitor7.visit(element) == null) {

             throw new RuntimeException("Null result of resource variable visitation.");

         }

     }

     class ResourceVariableScanner extends TreeScanner<Void, CompilationUnitTree> {

        private Trees trees;

        public ResourceVariableScanner(Trees trees) {

            super();

            this.trees = trees;

        }

        @Override

        public Void visitVariable(VariableTree node, CompilationUnitTree cu) {

            Element element = trees.getElement(trees.getPath(cu, node));

            System.out.println("Name: " + element.getSimpleName() +

                               "\tKind: " + element.getKind());

            if (element.getKind() == ElementKind.RESOURCE_VARIABLE) {

                testResourceVariable(element);

                resourceVariableCount++;

            }

            return super.visitVariable(node, cu);

        }

     }

 }