jdk8-mips64-public/langtools: test/tools/javac/processing/model/element/TestResourceVariable.java@b52a38d4536c

8005282: Use @library tag with non-relative path for javac tests
Reviewed-by: jjg

     1 /*

     2  * Copyright (c) 2010, 2011, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    24 /*

    25  * @test

    26  * @bug  6911256 6964740 6967842 6961571 7025809

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

    28  * @author  Joseph D. Darcy

    29  * @library /tools/javac/lib

    30  * @build   JavacTestingAbstractProcessor TestResourceVariable

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

    32  */

    34 import java.io.*;

    35 import javax.annotation.processing.*;

    36 import javax.lang.model.*;

    37 import javax.lang.model.element.*;

    38 import javax.lang.model.type.*;

    39 import javax.lang.model.util.*;

    40 import java.util.*;

    41 import com.sun.source.tree.*;

    42 import com.sun.source.util.*;

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

    45 /**

    46  * Using the tree API, retrieve element representations of the

    47  * resource of a try-with-resources statement and verify their kind

    48  * tags are set appropriately.

    49  */

    50 public class TestResourceVariable extends JavacTestingAbstractProcessor implements AutoCloseable {

    51     int resourceVariableCount = 0;

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

    54                           RoundEnvironment roundEnv) {

    55        if (!roundEnv.processingOver()) {

    56            Trees trees = Trees.instance(processingEnv);

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

    59                TreePath treePath = trees.getPath(rootElement);

    61                (new ResourceVariableScanner(trees)).

    62                    scan(trees.getTree(rootElement),

    63                         treePath.getCompilationUnit());

    64            }

    65            if (resourceVariableCount != 3)

    66                throw new RuntimeException("Bad resource variable count " +

    67                                           resourceVariableCount);

    68        }

    69        return true;

    70     }

    72     @Override

    73     public void close() {}

    75     private void test1() {

    76         try(TestResourceVariable trv = this) {}

    77     }

    79     private void test2() {

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

    81     }

    83     /**

    84      * Verify that a resource variable modeled as an element behaves

    85      * as expected under 6 and latest specific visitors.

    86      */

    87     private static void testResourceVariable(Element element) {

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

    90         try {

    91             visitor6.visit(element);

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

    93         } catch (UnknownElementException uee) {

    94             ; // Expected.

    95         }

    97         ElementKindVisitor visitorLatest =

    98             new ElementKindVisitor<Object, Void>() {

    99             @Override

   100             public Object visitVariableAsResourceVariable(VariableElement e,

   101                                                           Void p) {

   102                 return e; // a non-null value

   103             }

   104         };

   106         if (visitorLatest.visit(element) == null) {

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

   108         }

   109     }

   111     class ResourceVariableScanner extends TreeScanner<Void, CompilationUnitTree> {

   112        private Trees trees;

   114        public ResourceVariableScanner(Trees trees) {

   115            super();

   116            this.trees = trees;

   117        }

   118        @Override

   119        public Void visitVariable(VariableTree node, CompilationUnitTree cu) {

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

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

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

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

   125                testResourceVariable(element);

   126                resourceVariableCount++;

   127            }

   128            return super.visitVariable(node, cu);

   129        }

   130     }

   131 }

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