| /* |
| * Copyright (c) 2006, 2015, 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 6473148 |
| * @summary TreePath.iterator() throws NPE |
| * @modules jdk.compiler |
| */ |
| import java.io.*; |
| import java.util.Arrays; |
| import java.util.Iterator; |
| import java.util.Set; |
| |
| import javax.annotation.processing.*; |
| import javax.lang.model.SourceVersion; |
| import javax.lang.model.element.Element; |
| import javax.lang.model.element.TypeElement; |
| import javax.lang.model.util.ElementFilter; |
| import javax.tools.JavaCompiler; |
| import javax.tools.JavaFileObject; |
| import javax.tools.StandardJavaFileManager; |
| import javax.tools.ToolProvider; |
| |
| import com.sun.source.tree.Tree; |
| import com.sun.source.util.*; |
| |
| @SupportedAnnotationTypes("*") |
| public class TestTreePath extends AbstractProcessor { |
| |
| @Override |
| public boolean process(Set<? extends TypeElement> annotations, |
| RoundEnvironment roundEnv) { |
| final Trees trees = Trees.instance(this.processingEnv); |
| for (Element element : ElementFilter.typesIn(roundEnv.getRootElements())) { |
| checkTreePath(trees, element, 2); |
| for (Element member : element.getEnclosedElements()) |
| checkTreePath(trees, member, 3); |
| } |
| return true; |
| } |
| |
| private void checkTreePath(Trees trees, Element element, int expectedLength) { |
| TreePath path = trees.getPath(element); |
| assert path != null; |
| |
| int enhancedLength = 0; |
| for (Tree tree : path) |
| ++enhancedLength; |
| |
| if (enhancedLength != expectedLength) |
| throw new RuntimeException("found path length is wrong"); |
| |
| int normalLoopLength = 0; |
| Iterator<Tree> iter = path.iterator(); |
| while (iter.hasNext()) { |
| iter.next(); |
| ++normalLoopLength; |
| } |
| if (normalLoopLength != expectedLength) |
| throw new RuntimeException("found path length is wrong"); |
| |
| TreePath curr = path; |
| // using getParent |
| int whileLoopLength = 0; |
| while (curr != null) { |
| ++whileLoopLength; |
| curr = curr.getParentPath(); |
| } |
| if (whileLoopLength != expectedLength) |
| throw new RuntimeException("found path length is wrong"); |
| } |
| |
| @Override |
| public SourceVersion getSupportedSourceVersion() { |
| return SourceVersion.latest(); |
| } |
| |
| File writeTestFile() throws IOException { |
| File f = new File("Test.java"); |
| PrintWriter out = new PrintWriter(new FileWriter(f)); |
| out.println("class Test { void method() { } }"); |
| out.close(); |
| return f; |
| } |
| |
| public void run() throws IOException { |
| JavaCompiler compiler = ToolProvider.getSystemJavaCompiler(); |
| try (StandardJavaFileManager fileManager |
| = compiler.getStandardFileManager(null, null, null)) { |
| Iterable<? extends JavaFileObject> tests |
| = fileManager.getJavaFileObjects(writeTestFile()); |
| |
| JavaCompiler.CompilationTask task = |
| ToolProvider.getSystemJavaCompiler().getTask( |
| null, null, null, |
| Arrays.asList("-processor", this.getClass().getName()), null, |
| tests); |
| task.call(); |
| } |
| } |
| |
| public static void main(String[] args) throws IOException { |
| new TestTreePath().run(); |
| } |
| } |