118 lines
4.8 KiB
Java
118 lines
4.8 KiB
Java
/*
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* Copyright (c) 2013, 2015, 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 8023835
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* @summary Verify that implicit type of lambda parameter is correctly attributed
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* in Scope
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* @modules jdk.compiler/com.sun.tools.javac.api
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* jdk.compiler/com.sun.tools.javac.model
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* jdk.compiler/com.sun.tools.javac.util
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* @run main ScopeTest
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*/
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import com.sun.source.tree.CompilationUnitTree;
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import com.sun.source.tree.MemberSelectTree;
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import com.sun.source.tree.Scope;
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import com.sun.source.util.JavacTask;
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import com.sun.source.util.TreePath;
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import com.sun.source.util.TreePathScanner;
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import com.sun.source.util.Trees;
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import com.sun.tools.javac.api.JavacTaskImpl;
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import com.sun.tools.javac.api.JavacTool;
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import com.sun.tools.javac.model.JavacTypes;
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import java.io.IOException;
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import java.net.URI;
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import java.util.ArrayList;
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import java.util.Collections;
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import javax.lang.model.element.Element;
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import javax.lang.model.type.TypeMirror;
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import javax.lang.model.util.Types;
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import javax.tools.JavaFileObject;
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import javax.tools.JavaFileObject.Kind;
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import javax.tools.SimpleJavaFileObject;
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public class ScopeTest {
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private static final String SOURCE_CODE =
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"public class Test {\n" +
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" private static void test() {\n" +
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" InvokeOn f = null;\n" +
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" f.run(x -> { x.correct(); });\n" +
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" }\n" +
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" public static final class FooBar {\n" +
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" public void dontRun() { }\n" +
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" }\n" +
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"}\n" +
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"class InvokeOn {\n" +
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" public void run(I i) { }\n" +
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"}\n" +
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"class FooBar {\n" +
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" public void correct() { }\n" +
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"}\n" +
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"interface I {\n" +
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" public void run(FooBar f);\n" +
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"}";
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public static void main(String... args) throws Exception {
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verifyLambdaScopeCorrect("");
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verifyLambdaScopeCorrect("package test;");
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}
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private static void verifyLambdaScopeCorrect(final String packageClause) throws Exception {
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JavacTool tool = JavacTool.create();
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JavaFileObject source = new SimpleJavaFileObject(URI.create("mem://Test.java"), Kind.SOURCE) {
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@Override public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
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return packageClause + SOURCE_CODE;
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}
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@Override public boolean isNameCompatible(String simpleName, Kind kind) {
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return !"module-info".equals(simpleName);
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}
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};
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Iterable<? extends JavaFileObject> fos = Collections.singletonList(source);
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JavacTask task = tool.getTask(null, null, null, new ArrayList<String>(), null, fos);
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final Types types = JavacTypes.instance(((JavacTaskImpl) task).getContext());
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final Trees trees = Trees.instance(task);
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CompilationUnitTree cu = task.parse().iterator().next();
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task.analyze();
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new TreePathScanner<Void, Void>() {
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@Override public Void visitMemberSelect(MemberSelectTree node, Void p) {
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if (node.getIdentifier().contentEquals("correct")) {
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TypeMirror xType = trees.getTypeMirror(new TreePath(getCurrentPath(), node.getExpression()));
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Scope scope = trees.getScope(getCurrentPath());
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for (Element l : scope.getLocalElements()) {
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if (!l.getSimpleName().contentEquals("x")) continue;
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if (!types.isSameType(xType, l.asType())) {
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throw new IllegalStateException("Incorrect variable type in scope: " + l.asType() + "; should be: " + xType);
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}
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}
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}
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return super.visitMemberSelect(node, p);
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}
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}.scan(cu, null);
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}
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}
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