1 /*

     2  * Copyright 2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  */

    23 

    24 /*

    25  * @test

    26  * @bug 6473148

    27  * @summary TreePath.iterator() throws NPE

    28  */

    29 import java.io.*;

    30 import java.util.Arrays;

    31 import java.util.Iterator;

    32 import java.util.Set;

    33 

    34 import javax.annotation.processing.*;

    35 import javax.lang.model.SourceVersion;

    36 import javax.lang.model.element.Element;

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

    38 import javax.lang.model.util.ElementFilter;

    39 import javax.tools.JavaCompiler;

    40 import javax.tools.JavaFileObject;

    41 import javax.tools.StandardJavaFileManager;

    42 import javax.tools.ToolProvider;

    43 

    44 import com.sun.source.tree.Tree;

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

    46 

    47 @SupportedAnnotationTypes("*")

    48 public class TestTreePath extends AbstractProcessor {

    49 

    50     @Override

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

    52             RoundEnvironment roundEnv) {

    53         final Trees trees = Trees.instance(this.processingEnv);

    54         for (Element element : ElementFilter.typesIn(roundEnv.getRootElements())) {

    55             checkTreePath(trees, element, 2);

    56             for (Element member : element.getEnclosedElements())

    57                 checkTreePath(trees, member, 3);

    58         }

    59         return true;

    60     }

    61 

    62     private void checkTreePath(Trees trees, Element element, int expectedLength) {

    63         TreePath path = trees.getPath(element);

    64         assert path != null;

    65 

    66         int enhancedLength = 0;

    67         for (Tree tree : path)

    68             ++enhancedLength;

    69 

    70         if (enhancedLength != expectedLength)

    71             throw new RuntimeException("found path length is wrong");

    72 

    73         int normalLoopLength = 0;

    74         Iterator<Tree> iter = path.iterator();

    75         while (iter.hasNext()) {

    76           iter.next();

    77           ++normalLoopLength;

    78         }

    79         if (normalLoopLength != expectedLength)

    80             throw new RuntimeException("found path length is wrong");

    81 

    82         TreePath curr = path;

    83         // using getParent

    84         int whileLoopLength = 0;

    85         while (curr != null) {

    86           ++whileLoopLength;

    87           curr = curr.getParentPath();

    88         }

    89         if (whileLoopLength != expectedLength)

    90             throw new RuntimeException("found path length is wrong");

    91     }

    92 

    93     @Override

    94     public SourceVersion getSupportedSourceVersion() {

    95         return SourceVersion.latest();

    96     }

    97 

    98     File writeTestFile() throws IOException {

    99         File f = new File("Test.java");

   100         PrintWriter out = new PrintWriter(new FileWriter(f));

   101         out.println("class Test { void method() { } }");

   102         out.close();

   103         return f;

   104     }

   105 

   106     public void run() throws IOException {

   107         JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();

   108         StandardJavaFileManager fileManager

   109             = compiler.getStandardFileManager(null, null, null);

   110         Iterable<? extends JavaFileObject> tests

   111             = fileManager.getJavaFileObjects(writeTestFile());

   112 

   113         JavaCompiler.CompilationTask task =

   114             ToolProvider.getSystemJavaCompiler().getTask(

   115                     null, null, null,

   116                     Arrays.asList("-processor", this.getClass().getName()), null,

   117                     tests);

   118         task.call();

   119     }

   120 

   121     public static void main(String[] args) throws IOException {

   122         new TestTreePath().run();

   123     }

   124 }