aoqi@0: /*
aoqi@0:  * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: /*
aoqi@0:  * @test
aoqi@0:  * @bug 6473148
aoqi@0:  * @summary TreePath.iterator() throws NPE
aoqi@0:  */
aoqi@0: import java.io.*;
aoqi@0: import java.util.Arrays;
aoqi@0: import java.util.Iterator;
aoqi@0: import java.util.Set;
aoqi@0: 
aoqi@0: import javax.annotation.processing.*;
aoqi@0: import javax.lang.model.SourceVersion;
aoqi@0: import javax.lang.model.element.Element;
aoqi@0: import javax.lang.model.element.TypeElement;
aoqi@0: import javax.lang.model.util.ElementFilter;
aoqi@0: import javax.tools.JavaCompiler;
aoqi@0: import javax.tools.JavaFileObject;
aoqi@0: import javax.tools.StandardJavaFileManager;
aoqi@0: import javax.tools.ToolProvider;
aoqi@0: 
aoqi@0: import com.sun.source.tree.Tree;
aoqi@0: import com.sun.source.util.*;
aoqi@0: 
aoqi@0: @SupportedAnnotationTypes("*")
aoqi@0: public class TestTreePath extends AbstractProcessor {
aoqi@0: 
aoqi@0:     @Override
aoqi@0:     public boolean process(Set<? extends TypeElement> annotations,
aoqi@0:             RoundEnvironment roundEnv) {
aoqi@0:         final Trees trees = Trees.instance(this.processingEnv);
aoqi@0:         for (Element element : ElementFilter.typesIn(roundEnv.getRootElements())) {
aoqi@0:             checkTreePath(trees, element, 2);
aoqi@0:             for (Element member : element.getEnclosedElements())
aoqi@0:                 checkTreePath(trees, member, 3);
aoqi@0:         }
aoqi@0:         return true;
aoqi@0:     }
aoqi@0: 
aoqi@0:     private void checkTreePath(Trees trees, Element element, int expectedLength) {
aoqi@0:         TreePath path = trees.getPath(element);
aoqi@0:         assert path != null;
aoqi@0: 
aoqi@0:         int enhancedLength = 0;
aoqi@0:         for (Tree tree : path)
aoqi@0:             ++enhancedLength;
aoqi@0: 
aoqi@0:         if (enhancedLength != expectedLength)
aoqi@0:             throw new RuntimeException("found path length is wrong");
aoqi@0: 
aoqi@0:         int normalLoopLength = 0;
aoqi@0:         Iterator<Tree> iter = path.iterator();
aoqi@0:         while (iter.hasNext()) {
aoqi@0:           iter.next();
aoqi@0:           ++normalLoopLength;
aoqi@0:         }
aoqi@0:         if (normalLoopLength != expectedLength)
aoqi@0:             throw new RuntimeException("found path length is wrong");
aoqi@0: 
aoqi@0:         TreePath curr = path;
aoqi@0:         // using getParent
aoqi@0:         int whileLoopLength = 0;
aoqi@0:         while (curr != null) {
aoqi@0:           ++whileLoopLength;
aoqi@0:           curr = curr.getParentPath();
aoqi@0:         }
aoqi@0:         if (whileLoopLength != expectedLength)
aoqi@0:             throw new RuntimeException("found path length is wrong");
aoqi@0:     }
aoqi@0: 
aoqi@0:     @Override
aoqi@0:     public SourceVersion getSupportedSourceVersion() {
aoqi@0:         return SourceVersion.latest();
aoqi@0:     }
aoqi@0: 
aoqi@0:     File writeTestFile() throws IOException {
aoqi@0:         File f = new File("Test.java");
aoqi@0:         PrintWriter out = new PrintWriter(new FileWriter(f));
aoqi@0:         out.println("class Test { void method() { } }");
aoqi@0:         out.close();
aoqi@0:         return f;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void run() throws IOException {
aoqi@0:         JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
aoqi@0:         StandardJavaFileManager fileManager
aoqi@0:             = compiler.getStandardFileManager(null, null, null);
aoqi@0:         Iterable<? extends JavaFileObject> tests
aoqi@0:             = fileManager.getJavaFileObjects(writeTestFile());
aoqi@0: 
aoqi@0:         JavaCompiler.CompilationTask task =
aoqi@0:             ToolProvider.getSystemJavaCompiler().getTask(
aoqi@0:                     null, null, null,
aoqi@0:                     Arrays.asList("-processor", this.getClass().getName()), null,
aoqi@0:                     tests);
aoqi@0:         task.call();
aoqi@0:     }
aoqi@0: 
aoqi@0:     public static void main(String[] args) throws IOException {
aoqi@0:         new TestTreePath().run();
aoqi@0:     }
aoqi@0: }