Mercurial > jdk8-mips64-public > langtools / file revision

 /*

  * Copyright (c) 2013, 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 8012929

  * @summary Trees.getElement should work not only for declaration trees, but also for use-trees

  * @build TestGetElementReference

  * @run main TestGetElementReference

  */

 import com.sun.source.tree.CompilationUnitTree;

 import com.sun.source.tree.Tree;

 import com.sun.source.util.*;

 import java.io.File;

 import java.io.IOException;

 import java.net.URI;

 import java.util.Arrays;

 import java.util.regex.Matcher;

 import java.util.regex.Pattern;

 import javax.lang.model.element.Element;

 import javax.tools.Diagnostic;

 import javax.tools.DiagnosticCollector;

 import javax.tools.JavaFileObject;

 import javax.tools.SimpleJavaFileObject;

 import javax.tools.StandardJavaFileManager;

 import javax.tools.ToolProvider;

 public class TestGetElementReference {

     public static void main(String... args) throws IOException {

         File source = new File(System.getProperty("test.src", "."), "TestGetElementReferenceData.java").getAbsoluteFile();

         StandardJavaFileManager fm = ToolProvider.getSystemJavaCompiler().getStandardFileManager(null, null, null);

         DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<>();

         JavacTask ct = (JavacTask) ToolProvider.getSystemJavaCompiler().getTask(null, null, diagnostics, Arrays.asList("-Xjcov", "-source", "1.8"), null, fm.getJavaFileObjects(source));

         Trees trees = Trees.instance(ct);

         CompilationUnitTree cut = ct.parse().iterator().next();

         ct.analyze();

         for (Diagnostic<? extends JavaFileObject> d : diagnostics.getDiagnostics()) {

             if (d.getKind() == Diagnostic.Kind.ERROR) {

                 throw new IllegalStateException("Should have been attributed without errors: " + diagnostics.getDiagnostics());

             }

         }

         Pattern p = Pattern.compile("/\\*getElement:(.*?)\\*/");

         Matcher m = p.matcher(cut.getSourceFile().getCharContent(false));

         while (m.find()) {

             TreePath tp = pathFor(trees, cut, m.start() - 1);

             Element found = trees.getElement(tp);

             String expected = m.group(1);

             String actual = found != null ? found.getKind() + ":" + symbolToString(found) : "<null>";

             if (!expected.equals(actual)) {

                 throw new IllegalStateException("expected=" + expected + "; actual=" + actual);

             }

         }

     }

     private static TreePath pathFor(final Trees trees, final CompilationUnitTree cut, final int pos) {

         final TreePath[] result = new TreePath[1];

         new TreePathScanner<Void, Void>() {

             @Override public Void scan(Tree node, Void p) {

                 if (   node != null

                     && trees.getSourcePositions().getStartPosition(cut, node) <= pos

                     && pos <= trees.getSourcePositions().getEndPosition(cut, node)) {

                     result[0] = new TreePath(getCurrentPath(), node);

                     return super.scan(node, p);

                 }

                 return null;

             }

         }.scan(cut, null);

         return result[0];

     }

     private static String symbolToString(Element el) {

         switch (el.getKind()) {

             case METHOD: return symbolToString(el.getEnclosingElement()) + "." + el.toString();

             case CONSTRUCTOR: return symbolToString(el.getEnclosingElement().getEnclosingElement()) + "." + el.toString();

             default:

                 return el.toString();

         }

     }

     static class TestFileObject extends SimpleJavaFileObject {

         private final String text;

         public TestFileObject(String text) {

             super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);

             this.text = text;

         }

         @Override public CharSequence getCharContent(boolean ignoreEncodingErrors) {

             return text;

         }

     }

 }