/*

 * Copyright (c) 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 8039262

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

 *          class's members Scope.

 */

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

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

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

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

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

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

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

import java.lang.reflect.Field;

import java.util.Collection;

public class ScopeListenerTest {

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

        new ScopeListenerTest().run();

    }

    void run() throws Exception {

        Context context = new Context();

        JavacFileManager.preRegister(context);

        Types types = Types.instance(context);

        Symtab syms = Symtab.instance(context);

        Names names = Names.instance(context);

        types.membersClosure(syms.stringType, true);

        types.membersClosure(syms.stringType, false);

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

        listenersField.setAccessible(true);

        int listenerCount =

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

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

            types.membersClosure(syms.stringType, true);

            types.membersClosure(syms.stringType, false);

        }

        int newListenerCount

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

        if (listenerCount != newListenerCount) {

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

                                     "; new listener count: " + newListenerCount);

        }

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

            ;

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

            ;

    }

}