author | jlahoda |
Tue, 12 Nov 2019 06:32:13 +0000 | |
changeset 59021 | cfc7bb9a5a92 |
parent 53878 | 4584d0331318 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2018, 2019, 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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/* |
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* @test |
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* @bug 8206986 |
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* @summary Ensure rule cases can be parsed correctly for complex expressions. |
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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.AbstractMap.SimpleEntry; |
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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 java.util.Locale; |
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import java.util.Map.Entry; |
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import javax.tools.*; |
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import com.sun.source.tree.CaseTree; |
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import com.sun.source.tree.CompilationUnitTree; |
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import com.sun.source.util.JavacTask; |
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import com.sun.source.util.TreePathScanner; |
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import com.sun.source.util.Trees; |
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public class RuleParsingTest { |
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public static void main(String[] args) throws Exception { |
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String sourceVersion = Integer.toString(Runtime.version().feature()); |
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new RuleParsingTest().testParseComplexExpressions(sourceVersion); |
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} |
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void testParseComplexExpressions(String sourceVersion) throws Exception { |
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String[] expressions = { |
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"(a)", |
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"a", |
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"a + a", |
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"~a + a", |
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"a = a", |
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"a += a", |
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"a + (a)", |
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"a + (a) b", |
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"true ? a : b", |
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"m(() -> {})", |
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"m(() -> 1)", |
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"m(a -> 1)", |
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"m((t a) -> 1)", |
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}; |
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StringBuilder code = new StringBuilder(); |
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List<Entry<Long, Long>> spans = new ArrayList<>(); |
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code.append("class Test {\n" + |
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" void t(int i) {\n"); |
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for (boolean switchExpr : new boolean[] {false, true}) { |
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if (switchExpr) { |
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code.append(" int j = switch(i) {\n"); |
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} else { |
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code.append(" switch(i) {\n"); |
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} |
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for (String expr : expressions) { |
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code.append("case "); |
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int start = code.length(); |
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code.append(expr); |
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spans.add(new SimpleEntry<>((long) start, (long) code.length())); |
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code.append(" -> {}"); |
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} |
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code.append(" };\n"); |
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} |
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code.append(" }\n" + |
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"}\n"); |
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final JavaCompiler tool = ToolProvider.getSystemJavaCompiler(); |
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assert tool != null; |
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DiagnosticListener<JavaFileObject> noErrors = d -> { throw new AssertionError(d.getMessage(null)); }; |
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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(), null, |
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Arrays.asList(new MyFileObject(code.toString()))); |
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CompilationUnitTree cut = ct.parse().iterator().next(); |
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Trees trees = Trees.instance(ct); |
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new TreePathScanner<Void, Void>() { |
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@Override |
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public Void visitCase(CaseTree node, Void p) { |
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long start = trees.getSourcePositions().getStartPosition(cut, node.getExpression()); |
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long end = trees.getSourcePositions().getEndPosition(cut, node.getExpression()); |
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if (!spans.remove(new SimpleEntry<>(start, end))) { |
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throw new AssertionError("Did not find an expression span in expected spans: " + |
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start + "-" + end + |
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" '" + node.getExpression().toString() + "'"); |
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} |
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return super.visitCase(node, p); |
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} |
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}.scan(cut, null); |
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if (!spans.isEmpty()) { |
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throw new AssertionError("Remaning spans: " + spans); |
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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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} |