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 * Copyright (c) 2018, 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.

 *

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 */

/*

 * @test

 * @bug 8202141

 * @summary Verify that .class synthetic Symbols are not duplicated.

 * @library /tools/javac/lib

 * @modules jdk.compiler/com.sun.tools.javac.api

 *          jdk.compiler/com.sun.tools.javac.code

 *          jdk.compiler/com.sun.tools.javac.tree

 *          jdk.compiler/com.sun.tools.javac.util

 * @build combo.ComboTestHelper

 * @run main ClassFieldDeduplication

 */

import com.sun.source.util.TaskEvent;

import com.sun.source.util.TaskListener;

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

import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;

import com.sun.tools.javac.tree.JCTree.JCFieldAccess;

import com.sun.tools.javac.tree.TreeScanner;

import combo.ComboInstance;

import combo.ComboParameter;

import combo.ComboTestHelper;

public class ClassFieldDeduplication extends ComboInstance<ClassFieldDeduplication> {

    enum Type implements ComboParameter {

        OBJECT("Object"),

        PRIMITIVE("int"),

        BOXED_PRIMITIVE("Integer"),

        VOID("void"),

        BOXED_VOID("Void"),

        OBJECT_ARRAY("Object[]"),

        PRIMITIVE_ARRAY("int[]"),

        BOXED_PRIMITIVE_ARRAY("Integer[]"),

        BOXED_VOID_ARRAY("Void[]");

        String type;

        Type(String type) {

            this.type = type;

        }

        @Override

        public String expand(String optParameter) {

            return type;

        }

    }

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

        new ComboTestHelper<ClassFieldDeduplication>()

                .withDimension("TYPE", Type.values())

                .run(ClassFieldDeduplication::new);

    }

    private static final String TEMPLATE =

            "class Test { void t() { Object o1 = #{TYPE}.class; Object o2 = #{TYPE}.class; } }";

    @Override

    protected void doWork() throws Throwable {

        newCompilationTask()

                .withSourceFromTemplate(TEMPLATE)

                .withListener(new TaskListener() {

                    JCCompilationUnit cut;

                        @Override

                        public void finished(TaskEvent e) {

                            if (e.getKind() == TaskEvent.Kind.PARSE) {

                                if (cut != null)

                                    throw new AssertionError();

                                cut = (JCCompilationUnit) e.getCompilationUnit();

                            }

                            if (e.getKind() == TaskEvent.Kind.ANALYZE) {

                                cut.accept(new TreeScanner() {

                                    Symbol s;

                                    @Override

                                    public void visitSelect(JCFieldAccess tree) {

                                        if (tree.name.contentEquals("class")) {

                                            if (s == null) {

                                                s = tree.sym;

                                            } else if (s != tree.sym) {

                                                throw new AssertionError("Duplicated field symbol.");

                                            }

                                        }

                                        super.visitSelect(tree);

                                    }

                                });

                            }

                        }

                })

                .analyze(els -> {});

    }

}