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