1 /*
   2  * Copyright (c) 2010, 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  */
  23 
  24 /*
  25  * @test
  26  * @bug  6911256 6964740
  27  * @summary Test that the resource variable kind is appropriately set
  28  * @author  Joseph D. Darcy
  29  * @build TestResourceVariable
  30  * @compile -processor TestResourceVariable -proc:only TestResourceVariable.java
  31  */
  32 
  33 import java.io.*;
  34 import javax.annotation.processing.*;
  35 import javax.lang.model.*;
  36 import javax.lang.model.element.*;
  37 import javax.lang.model.type.*;
  38 import javax.lang.model.util.*;
  39 import java.util.*;
  40 import com.sun.source.tree.*;
  41 import com.sun.source.util.*;
  42 import static javax.tools.Diagnostic.Kind.*;
  43 
  44 /**
  45  * Using the tree API, retrieve element representations of the
  46  * resource of an ARM block and verify their kind tags are set
  47  * appropriately.
  48  */
  49 @SupportedAnnotationTypes("*")
  50 public class TestResourceVariable extends AbstractProcessor implements AutoCloseable {
  51     int resourceVariableCount = 0;
  52 
  53     public boolean process(Set<? extends TypeElement> annotations,
  54                           RoundEnvironment roundEnv) {
  55        if (!roundEnv.processingOver()) {
  56            Trees trees = Trees.instance(processingEnv);
  57 
  58            for(Element rootElement : roundEnv.getRootElements()) {
  59                TreePath treePath = trees.getPath(rootElement);
  60 
  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     }
  71 
  72     @Override
  73     public void close() {}
  74 
  75     private void test1() {
  76         try(TestResourceVariable trv = this) {}
  77     }
  78 
  79     private void test2() {
  80         try(TestResourceVariable trv1 = this; TestResourceVariable trv2 = trv1) {}
  81     }
  82 
  83     class ResourceVariableScanner extends TreeScanner<Void, CompilationUnitTree> {
  84        private Trees trees;
  85 
  86        public ResourceVariableScanner(Trees trees) {
  87            super();
  88            this.trees = trees;
  89        }
  90        @Override
  91        public Void visitVariable(VariableTree node, CompilationUnitTree cu) {
  92            Element element = trees.getElement(trees.getPath(cu, node));
  93            if (element == null) {
  94                System.out.println("Null variable element.");
  95            } else {
  96                System.out.println("Name: " + element.getSimpleName() +
  97                                   "\tKind: " + element.getKind());
  98            }
  99            if (element != null &&
 100                element.getKind() == ElementKind.RESOURCE_VARIABLE) {
 101                resourceVariableCount++;
 102            }
 103            return super.visitVariable(node, cu);
 104        }
 105    }
 106 
 107    @Override
 108    public SourceVersion getSupportedSourceVersion() {
 109        return SourceVersion.latest();
 110    }
 111 }