| /* |
| * Copyright (c) 2011, 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 7068902 8139751 |
| * @summary verify that string folding can be enabled or disabled |
| * @modules jdk.compiler |
| */ |
| |
| import com.sun.source.tree.CompilationUnitTree; |
| import com.sun.source.util.JavacTask; |
| 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 javax.tools.JavaCompiler; |
| import javax.tools.JavaFileObject; |
| import javax.tools.SimpleJavaFileObject; |
| import javax.tools.ToolProvider; |
| |
| public class StringFoldingTest { |
| final JavaCompiler tool; |
| final JavaSource source; |
| |
| public StringFoldingTest() { |
| tool = ToolProvider.getSystemJavaCompiler(); |
| source = new JavaSource(); |
| } |
| |
| static class JavaSource extends SimpleJavaFileObject { |
| |
| final static String source = |
| "class C {String X=\"F\" + \"O\" + \"L\" + \"D\" + \"E\" + \"D\";}"; |
| |
| JavaSource() { |
| super(URI.create("myfo:/C.java"), JavaFileObject.Kind.SOURCE); |
| } |
| |
| @Override |
| public CharSequence getCharContent(boolean ignoreEncodingErrors) { |
| return source; |
| } |
| } |
| |
| public static void main(String... args) throws IOException { |
| StringFoldingTest t = new StringFoldingTest(); |
| t.run(false); |
| t.run(true); |
| } |
| |
| void run(boolean disableStringFolding) throws IOException { |
| List<String> argsList = new ArrayList<String>(); |
| if (disableStringFolding) { |
| argsList.add("-XDallowStringFolding=false"); |
| } |
| JavacTask ct = (JavacTask)tool.getTask(null, null, null, |
| argsList, |
| null, |
| Arrays.asList(source)); |
| Iterable<? extends CompilationUnitTree> trees = ct.parse(); |
| String text = trees.toString(); |
| System.out.println(text); |
| |
| if (disableStringFolding) { |
| if (text.contains("FOLDED")) { |
| throw new AssertionError("Expected no string folding"); |
| } |
| if (!text.contains("\"F\"")) { |
| throw new AssertionError("Expected content not found"); |
| } |
| } else { |
| if (!text.contains("FOLDED")) { |
| throw new AssertionError("Expected string folding"); |
| } |
| } |
| } |
| } |