/*

 * Copyright (c) 2010, 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

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 * questions.

 */

/*

 * @test

 * @bug 6967842

 * @summary Element not returned from tree API for ARM resource variables.

 * @author A. Sundararajan

 * @build   JavacTestingAbstractProcessor TestResourceElement

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

 */

import javax.annotation.processing.*;

import javax.lang.model.*;

import javax.lang.model.element.*;

import java.util.*;

import com.sun.source.tree.*;

import com.sun.source.util.*;

public class TestResourceElement extends JavacTestingAbstractProcessor implements AutoCloseable {

    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);

               VariableScanner varScanner =  new VariableScanner(trees);

               varScanner.scan(trees.getTree(rootElement),

                        treePath.getCompilationUnit());

               if (varScanner.getTrvElement() == null) {

                   throw new AssertionError("Element is null for 'trv'");

               }

           }

       }

       return true;

    }

    @Override

    public void close() {}

    private void test1() {

        // The resource variable "trv"'s Element is checked.

        // Do not change the name of the variable.

        try(TestResourceElement trv = this) {}

    }

    class VariableScanner extends TreeScanner<Void, CompilationUnitTree> {

       private Trees trees;

       private Element trvElement;

       public VariableScanner(Trees trees) {

           super();

           this.trees = trees;

       }

       @Override

       public Void visitVariable(VariableTree node, CompilationUnitTree cu) {

           // if this is "trv", get it's element.

           if (node.getName().contentEquals("trv")) {

               trvElement = trees.getElement(trees.getPath(cu, node));

           }

           return super.visitVariable(node, cu);

       }

       Element getTrvElement() {

           return trvElement;

       }

   }

}