1 /*

     2  * Copyright (c) 2015, 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  */

    23 

    24 /*

    25  * @test

    26  * @bug 8039262

    27  * @summary Ensure that using Types.membersClosure does not increase the number of listeners on the

    28  *          class's members Scope.

    29  */

    30 

    31 import com.sun.tools.javac.code.Scope;

    32 import com.sun.tools.javac.code.Symbol;

    33 import com.sun.tools.javac.code.Symtab;

    34 import com.sun.tools.javac.code.Types;

    35 import com.sun.tools.javac.file.JavacFileManager;

    36 import com.sun.tools.javac.util.Context;

    37 import com.sun.tools.javac.util.Names;

    38 import java.lang.reflect.Field;

    39 import java.util.Collection;

    40 

    41 public class ScopeListenerTest {

    42 

    43     public static void main(String[] args) throws Exception {

    44         new ScopeListenerTest().run();

    45     }

    46 

    47     void run() throws Exception {

    48         Context context = new Context();

    49         JavacFileManager.preRegister(context);

    50         Types types = Types.instance(context);

    51         Symtab syms = Symtab.instance(context);

    52         Names names = Names.instance(context);

    53         types.membersClosure(syms.stringType, true);

    54         types.membersClosure(syms.stringType, false);

    55 

    56         Field listenersField = Scope.class.getDeclaredField("listeners");

    57 

    58         listenersField.setAccessible(true);

    59 

    60         int listenerCount =

    61                 ((Collection) listenersField.get(syms.stringType.tsym.members())).size();

    62 

    63         for (int i = 0; i < 100; i++) {

    64             types.membersClosure(syms.stringType, true);

    65             types.membersClosure(syms.stringType, false);

    66         }

    67 

    68         int newListenerCount

    69                 = ((Collection) listenersField.get(syms.stringType.tsym.members())).size();

    70 

    71         if (listenerCount != newListenerCount) {

    72             throw new AssertionError("Orig listener count: " + listenerCount +

    73                                      "; new listener count: " + newListenerCount);

    74         }

    75 

    76         for (Symbol s : types.membersClosure(syms.stringType, true).getSymbols())

    77             ;

    78         for (Symbol s : types.membersClosure(syms.stringType, false).getSymbolsByName(names.fromString("substring")))

    79             ;

    80     }

    81 

    82 }