aoqi@0: /*
aoqi@0:  * Copyright (c) 2013, 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 8012929
aoqi@0:  * @summary Trees.getElement should work not only for declaration trees, but also for use-trees
aoqi@0:  * @build TestGetElementReference
aoqi@0:  * @run main TestGetElementReference
aoqi@0:  */
aoqi@0: 
aoqi@0: import com.sun.source.tree.CompilationUnitTree;
aoqi@0: import com.sun.source.tree.Tree;
aoqi@0: import com.sun.source.util.*;
aoqi@0: import java.io.File;
aoqi@0: import java.io.IOException;
aoqi@0: import java.net.URI;
aoqi@0: import java.util.Arrays;
aoqi@0: import java.util.regex.Matcher;
aoqi@0: import java.util.regex.Pattern;
aoqi@0: import javax.lang.model.element.Element;
aoqi@0: import javax.tools.Diagnostic;
aoqi@0: import javax.tools.DiagnosticCollector;
aoqi@0: import javax.tools.JavaFileObject;
aoqi@0: import javax.tools.SimpleJavaFileObject;
aoqi@0: import javax.tools.StandardJavaFileManager;
aoqi@0: import javax.tools.ToolProvider;
aoqi@0: 
aoqi@0: public class TestGetElementReference {
aoqi@0: 
aoqi@0:     public static void main(String... args) throws IOException {
aoqi@0:         File source = new File(System.getProperty("test.src", "."), "TestGetElementReferenceData.java").getAbsoluteFile();
aoqi@0:         StandardJavaFileManager fm = ToolProvider.getSystemJavaCompiler().getStandardFileManager(null, null, null);
aoqi@0:         DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<>();
aoqi@0:         JavacTask ct = (JavacTask) ToolProvider.getSystemJavaCompiler().getTask(null, null, diagnostics, Arrays.asList("-Xjcov", "-source", "1.8"), null, fm.getJavaFileObjects(source));
aoqi@0:         Trees trees = Trees.instance(ct);
aoqi@0:         CompilationUnitTree cut = ct.parse().iterator().next();
aoqi@0: 
aoqi@0:         ct.analyze();
aoqi@0: 
aoqi@0:         for (Diagnostic<? extends JavaFileObject> d : diagnostics.getDiagnostics()) {
aoqi@0:             if (d.getKind() == Diagnostic.Kind.ERROR) {
aoqi@0:                 throw new IllegalStateException("Should have been attributed without errors: " + diagnostics.getDiagnostics());
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         Pattern p = Pattern.compile("/\\*getElement:(.*?)\\*/");
aoqi@0:         Matcher m = p.matcher(cut.getSourceFile().getCharContent(false));
aoqi@0: 
aoqi@0:         while (m.find()) {
aoqi@0:             TreePath tp = pathFor(trees, cut, m.start() - 1);
aoqi@0:             Element found = trees.getElement(tp);
aoqi@0:             String expected = m.group(1);
aoqi@0:             String actual = found != null ? found.getKind() + ":" + symbolToString(found) : "<null>";
aoqi@0: 
aoqi@0:             if (!expected.equals(actual)) {
aoqi@0:                 throw new IllegalStateException("expected=" + expected + "; actual=" + actual);
aoqi@0:             }
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     private static TreePath pathFor(final Trees trees, final CompilationUnitTree cut, final int pos) {
aoqi@0:         final TreePath[] result = new TreePath[1];
aoqi@0: 
aoqi@0:         new TreePathScanner<Void, Void>() {
aoqi@0:             @Override public Void scan(Tree node, Void p) {
aoqi@0:                 if (   node != null
aoqi@0:                     && trees.getSourcePositions().getStartPosition(cut, node) <= pos
aoqi@0:                     && pos <= trees.getSourcePositions().getEndPosition(cut, node)) {
aoqi@0:                     result[0] = new TreePath(getCurrentPath(), node);
aoqi@0:                     return super.scan(node, p);
aoqi@0:                 }
aoqi@0:                 return null;
aoqi@0:             }
aoqi@0:         }.scan(cut, null);
aoqi@0: 
aoqi@0:         return result[0];
aoqi@0:     }
aoqi@0: 
aoqi@0:     private static String symbolToString(Element el) {
aoqi@0:         switch (el.getKind()) {
aoqi@0:             case METHOD: return symbolToString(el.getEnclosingElement()) + "." + el.toString();
aoqi@0:             case CONSTRUCTOR: return symbolToString(el.getEnclosingElement().getEnclosingElement()) + "." + el.toString();
aoqi@0:             default:
aoqi@0:                 return el.toString();
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     static class TestFileObject extends SimpleJavaFileObject {
aoqi@0:         private final String text;
aoqi@0:         public TestFileObject(String text) {
aoqi@0:             super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
aoqi@0:             this.text = text;
aoqi@0:         }
aoqi@0:         @Override public CharSequence getCharContent(boolean ignoreEncodingErrors) {
aoqi@0:             return text;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0: }