/*
 * Copyright (c) 2014, Oracle America, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 *  * Neither the name of Oracle nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.jzf;

import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.CompilerControl;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;

import java.io.*;
import java.net.*;
import java.nio.file.*;
import java.util.*;
import java.util.stream.*;

import java.util.concurrent.TimeUnit;

@State(Scope.Benchmark)
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS)
@Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.NANOSECONDS)
@Fork(5)

public class MyBenchmark {

    private FileSystem fs;
    private List<String> entriesS;
    private List<Path> entriesP;

    @Setup
    public void setup() throws Throwable {
       fs =  FileSystems.getFileSystem(URI.create("jrt:/"));
       entriesS = new ArrayList<>();
       entriesP = new ArrayList<>();
       Files.walk(fs.getPath("/"), 10)
            .forEach( p -> {
                          entriesP.add(p);
			  entriesS.add(p.toString());
		});
       System.err.println("Total: " + entriesS.size());
    }

    private static int cnt;
    private static void dosomething(Path p) {
        cnt++;
    }
    private static void dosomething(String s) {
        cnt++;
    }

    /*
    @Benchmark
    public void testLookupStr() throws IOException {
        Map<String, ?> env = Collections.emptyMap();
        cnt = 0;
        try (FileSystem fs0 = FileSystems.newFileSystem(URI.create("jrt:/"), env)) {
            for (String s : entriesS) {
                if (Files.exists(fs0.getPath(s)))
                    dosomething(s);
            }
        }
    }
    */

    @Benchmark
    public void testLookupStr() throws IOException {
        Map<String, ?> env = Collections.emptyMap();
        cnt = 0;
        for (String s : entriesS) {
            if (Files.exists(fs.getPath(s)))
                dosomething(s);
        }
    }

    @Benchmark
    public void testItr() throws IOException {
       cnt = 0;
       Files.walk(fs.getPath("/"), 10)
            .forEach( p -> dosomething(p));
    }

    @Benchmark
    public void testLookupPath() throws IOException {
        cnt = 0;
        for (Path p : entriesP) {
            if (Files.exists(p))
                dosomething(p);
        }
    }

    @Benchmark
    public void testExists() throws IOException {
        cnt = 0;
        for (Path p : entriesP) {
            if (Files.exists(p))
                dosomething(p);
        }
    }

    @Benchmark
    public void testIsDirectory() throws IOException {
        cnt = 0;
        for (Path p : entriesP) {
            if (Files.isDirectory(p))
                dosomething(p);
        }
    }

    @Benchmark
    public void testIsRegularFile() throws IOException {
        cnt = 0;
        for (Path p : entriesP) {
            if (Files.isRegularFile(p))
                dosomething(p);
        }
    }

    @Benchmark
    public void testToRealPath() throws IOException {
        cnt = 0;
        for (Path p : entriesP) {
            dosomething(p.toRealPath());
        }
    }


}