author | jlahoda |
Wed, 29 Aug 2018 09:36:17 +0200 | |
changeset 51563 | de411d537aae |
child 53023 | 6879069d9d94 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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/* |
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* @test |
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* @bug 8206986 |
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* @summary Ensure BreakTree.getLabel returns reasonable values |
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* @modules jdk.compiler |
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*/ |
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import java.io.StringWriter; |
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import java.net.URI; |
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import java.util.ArrayList; |
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import java.util.Arrays; |
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import java.util.List; |
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import javax.lang.model.element.Name; |
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import javax.tools.*; |
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import com.sun.source.tree.BreakTree; |
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import com.sun.source.util.JavacTask; |
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import com.sun.source.util.TreePathScanner; |
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public class BreakTest { |
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private static final String CODE = |
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"public class C {" + |
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" void t1(Integer i) {" + |
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" LABEL: switch (i) {" + |
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" case null: i++; break LABEL;" + |
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" default: i++; break;" + |
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" }" + |
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" }" + |
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" int t2(Integer i) {" + |
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" return switch (i) {" + |
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" case null: break LABEL;" + |
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" default: break 2;" + |
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" }" + |
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" }" + |
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"}"; |
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public static void main(String[] args) throws Exception { |
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final JavaCompiler tool = ToolProvider.getSystemJavaCompiler(); |
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assert tool != null; |
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DiagnosticListener<JavaFileObject> noErrors = d -> {}; |
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StringWriter out = new StringWriter(); |
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JavacTask ct = (JavacTask) tool.getTask(out, null, noErrors, |
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List.of("-XDdev", "--enable-preview", "-source", "12"), null, |
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Arrays.asList(new MyFileObject(CODE))); |
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List<String> labels = new ArrayList<>(); |
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new TreePathScanner<Void, Void>() { |
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@Override |
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public Void visitBreak(BreakTree node, Void p) { |
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Name label = node.getLabel(); |
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labels.add(label != null ? label.toString() : null); |
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return super.visitBreak(node, p); |
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} |
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}.scan(ct.parse(), null); |
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List<String> expected = Arrays.asList("LABEL", null, "LABEL", null); |
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if (!expected.equals(labels)) { |
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throw new AssertionError("Unexpected labels found: " + labels); |
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} |
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} |
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static class MyFileObject extends SimpleJavaFileObject { |
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private String text; |
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public MyFileObject(String text) { |
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super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE); |
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this.text = text; |
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} |
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@Override |
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public CharSequence getCharContent(boolean ignoreEncodingErrors) { |
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return text; |
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} |
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} |
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} |