/*
* Copyright (c) 2006, 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
*/
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();
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();
}
}