105 lines
4.0 KiB
Java
105 lines
4.0 KiB
Java
/*
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* Copyright (c) 2017, 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 8175235
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* @summary type inference regression after JDK-8046685
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* @library /tools/javac/lib
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* @modules jdk.compiler/com.sun.source.util
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* jdk.compiler/com.sun.tools.javac.api
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* jdk.compiler/com.sun.tools.javac.code
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* jdk.compiler/com.sun.tools.javac.file
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* jdk.compiler/com.sun.tools.javac.tree
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* jdk.compiler/com.sun.tools.javac.util
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* @build DPrinter
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* @run main InferenceRegressionTest02
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*/
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import java.io.*;
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import java.net.URI;
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import java.util.Arrays;
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import javax.tools.JavaCompiler;
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import javax.tools.JavaFileObject;
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import javax.tools.SimpleJavaFileObject;
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import javax.tools.ToolProvider;
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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.Trees;
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import com.sun.tools.javac.api.JavacTrees;
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import com.sun.tools.javac.file.JavacFileManager;
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import com.sun.tools.javac.tree.JCTree;
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import com.sun.tools.javac.util.Assert;
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import com.sun.tools.javac.util.Context;
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public class InferenceRegressionTest02 {
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public static void main(String... args) throws Exception {
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new InferenceRegressionTest02().run();
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}
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void run() throws Exception {
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Context context = new Context();
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JavacFileManager.preRegister(context);
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Trees trees = JavacTrees.instance(context);
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StringWriter strOut = new StringWriter();
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PrintWriter pw = new PrintWriter(strOut);
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DPrinter dprinter = new DPrinter(pw, trees);
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final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
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JavacTask ct = (JavacTask)tool.getTask(null, null, null, null, null, Arrays.asList(new JavaSource()));
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Iterable<? extends CompilationUnitTree> elements = ct.parse();
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ct.analyze();
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Assert.check(elements.iterator().hasNext());
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dprinter.treeTypes(true).printTree("", (JCTree)elements.iterator().next());
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String output = strOut.toString();
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Assert.check(!output.contains("java.lang.Object"), "there shouldn't be any type instantiated to Object");
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}
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static class JavaSource extends SimpleJavaFileObject {
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String source =
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"import java.util.function.*;\n" +
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"import java.util.*;\n" +
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"import java.util.stream.*;\n" +
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"class Foo {\n" +
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" void test(List<Map.Entry<Foo, Foo>> ls) {\n" +
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" Map<Foo, Set<Foo>> res = ls.stream()\n" +
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" .collect(Collectors.groupingBy(Map.Entry::getKey,\n" +
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" HashMap::new,\n" +
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" Collectors.mapping(Map.Entry::getValue, Collectors.toSet())));\n" +
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" }\n" +
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"}";
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public JavaSource() {
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super(URI.create("myfo:/Foo.java"), JavaFileObject.Kind.SOURCE);
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}
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@Override
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public CharSequence getCharContent(boolean ignoreEncodingErrors) {
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return source;
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}
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}
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}
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