/*

 * 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 8000316

 * @summary Huge performance bottleneck in com.sun.tools.javac.comp.Check.localClassName

 * @modules jdk.compiler

 * @run main T8000316

 */

import com.sun.source.util.JavacTask;

import java.net.URI;

import java.util.List;

import java.util.ArrayList;

import java.util.Locale;

import javax.tools.Diagnostic;

import javax.tools.JavaCompiler;

import javax.tools.JavaFileObject;

import javax.tools.SimpleJavaFileObject;

import javax.tools.StandardJavaFileManager;

import javax.tools.ToolProvider;

public class T8000316 {

    final static int N_METHODS = 1024;

    final static int N_CLASSES = 8;

    static class TestClass extends SimpleJavaFileObject {

        String methTemplate = "    public static Runnable get#N() {\n" +

                              "        return new Runnable() {\n" +

                              "            @Override\n" +

                              "            public void run() {\n" +

                              "                return;\n" +

                              "            }\n" +

                              "        };\n" +

                              "    }\n";

        String classTemplate = "\n\nclass Chain#N {\n\n#M }";

        String source;

        public TestClass() {

            super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);

            StringBuilder buf = new StringBuilder();

            StringBuilder fileBuf = new StringBuilder();

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

                for (int j = 0; j < N_METHODS; j++) {

                    buf.append(methTemplate.replace("#N", String.valueOf(j)));

                    buf.append("\n");

                }

                fileBuf.append(classTemplate.replace("#M", buf.toString()).replace("#N", String.valueOf(i)));

                buf = new StringBuilder();

                source = fileBuf.toString();

            }

        }

        @Override

        public CharSequence getCharContent(boolean ignoreEncodingErrors) {

            return source;

        }

    }

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

        ArrayList<JavaFileObject> sources = new ArrayList<>();

        sources.add(new TestClass());

        new T8000316().run(sources);

    }

    void run(List<JavaFileObject> sources) throws Exception {

        javax.tools.DiagnosticListener<JavaFileObject> dc = (diagnostic) -> {

            if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {

                throw new AssertionError("unexpected diagnostic: " + diagnostic.getMessage(Locale.getDefault()));

            }

        };

        JavaCompiler comp = ToolProvider.getSystemJavaCompiler();

        try (StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null)) {

            JavacTask ct = (JavacTask)comp.getTask(null, fm, dc,

                    null, null, sources);

            ct.analyze();

        }

    }

}