jdk8-mips64-public/langtools: test/tools/javac/tree/ScopeTest.java@41599b57d262

     1 /*

     2  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    24 /*

    25  * @test

    26  * @bug     8023835

    27  * @summary Verify that implicit type of lambda parameter is correctly attributed

    28  *          in Scope

    29  * @run main ScopeTest

    30  */

    32 import com.sun.source.tree.CompilationUnitTree;

    33 import com.sun.source.tree.MemberSelectTree;

    34 import com.sun.source.tree.Scope;

    35 import com.sun.source.util.JavacTask;

    36 import com.sun.source.util.TreePath;

    37 import com.sun.source.util.TreePathScanner;

    38 import com.sun.source.util.Trees;

    39 import com.sun.tools.javac.api.JavacTaskImpl;

    40 import com.sun.tools.javac.api.JavacTool;

    41 import com.sun.tools.javac.model.JavacTypes;

    42 import java.io.IOException;

    43 import java.net.URI;

    44 import java.util.ArrayList;

    45 import java.util.Collections;

    46 import javax.lang.model.element.Element;

    47 import javax.lang.model.type.TypeMirror;

    48 import javax.lang.model.util.Types;

    49 import javax.tools.JavaFileObject;

    50 import javax.tools.JavaFileObject.Kind;

    51 import javax.tools.SimpleJavaFileObject;

    53 public class ScopeTest {

    55     private static final String SOURCE_CODE =

    56             "public class Test {\n" +

    57             "    private static void test() {\n" +

    58             "        InvokeOn f = null;\n" +

    59             "        f.run(x -> { x.correct(); });\n" +

    60             "    }\n" +

    61             "    public static final class FooBar {\n" +

    62             "        public void dontRun() { }\n" +

    63             "    }\n" +

    64             "}\n" +

    65             "class InvokeOn {\n" +

    66             "    public void run(I i) { }\n" +

    67             "}\n" +

    68             "class FooBar {\n" +

    69             "    public void correct() { }\n" +

    70             "}\n" +

    71             "interface I {\n" +

    72             "    public void run(FooBar f);\n" +

    73             "}";

    75     public static void main(String... args) throws Exception {

    76         verifyLambdaScopeCorrect("");

    77         verifyLambdaScopeCorrect("package test;");

    78     }

    80     private static void verifyLambdaScopeCorrect(final String packageClause) throws Exception {

    81         JavacTool tool = JavacTool.create();

    82         JavaFileObject source = new SimpleJavaFileObject(URI.create("mem://Test.java"), Kind.SOURCE) {

    83             @Override public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {

    84                 return packageClause + SOURCE_CODE;

    85             }

    86             @Override public boolean isNameCompatible(String simpleName, Kind kind) {

    87                 return true;

    88             }

    89         };

    90         Iterable<? extends JavaFileObject> fos = Collections.singletonList(source);

    91         JavacTask task = tool.getTask(null, null, null, new ArrayList<String>(), null, fos);

    92         final Types types = JavacTypes.instance(((JavacTaskImpl) task).getContext());

    93         final Trees trees = Trees.instance(task);

    94         CompilationUnitTree cu = task.parse().iterator().next();

    96         task.analyze();

    98         new TreePathScanner<Void, Void>() {

    99             @Override public Void visitMemberSelect(MemberSelectTree node, Void p) {

   100                 if (node.getIdentifier().contentEquals("correct")) {

   101                     TypeMirror xType = trees.getTypeMirror(new TreePath(getCurrentPath(), node.getExpression()));

   102                     Scope scope = trees.getScope(getCurrentPath());

   103                     for (Element l : scope.getLocalElements()) {

   104                         if (!l.getSimpleName().contentEquals("x")) continue;

   105                         if (!types.isSameType(xType, l.asType())) {

   106                             throw new IllegalStateException("Incorrect variable type in scope: " + l.asType() + "; should be: " + xType);

   107                         }

   108                     }

   109                 }

   110                 return super.visitMemberSelect(node, p);

   111             }

   112         }.scan(cu, null);

   113     }

   114 }

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