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/*
* Copyright (c) 2013, 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 8012929
* @summary Trees.getElement should work not only for declaration trees, but also for use-trees
* @modules jdk.compiler
* @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.ArrayList;
import java.util.Arrays;
import java.util.List;
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 {
analyze("TestGetElementReferenceData.java");
analyze("mod/module-info.java", "mod/api/pkg/Api.java");
}
private static void analyze(String... fileNames) throws IOException {
try (StandardJavaFileManager fm = ToolProvider.getSystemJavaCompiler().getStandardFileManager(null, null, null)) {
List<JavaFileObject> files = new ArrayList<>();
for (String fileName : fileNames) {
File source = new File(System.getProperty("test.src", "."), fileName.replace('/', File.separatorChar)).getAbsoluteFile();
for (JavaFileObject f : fm.getJavaFileObjects(source)) {
files.add(f);
}
}
DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<>();
JavacTask ct = (JavacTask) ToolProvider.getSystemJavaCompiler().getTask(null, null, diagnostics, Arrays.asList("-Xjcov"), null, files);
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);
String expected = m.group(1);
if (expected.startsWith("getParentPath:")) {
tp = tp.getParentPath();
expected = expected.substring("getParentPath:".length());
}
Element found = trees.getElement(tp);
String actual = found != null ? found.getKind() + ":" + symbolToString(found) : "<null>";
if (!expected.equals(actual)) {
throw new IllegalStateException("expected=" + expected + "; actual=" + actual + "; tree: " + tp.getLeaf());
}
}
}
}
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;
}
}
}
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