// ASM: a very small and fast Java bytecode manipulation framework
// Copyright (c) 2000-2011 INRIA, France Telecom
// All rights reserved.
//
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// modification, are permitted provided that the following conditions
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//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
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//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
//
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package org.objectweb.asm.benchmarks;

import java.util.concurrent.TimeUnit;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;

/**
 * A benchmark to measure the performance of several libraries when generating a "Hello World!"
 * class.
 *
 * @author Eric Bruneton
 */
@Fork(1)
@Warmup(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
@Measurement(iterations = 30, time = 1, timeUnit = TimeUnit.SECONDS)
@State(Scope.Thread)
public class GeneratorBenchmark extends AbstractBenchmark {

  private Generator asm4dot0;
  private Generator asm5dot0;
  private Generator asm6dot0;
  private Generator asm6dot1;
  private Generator asm6dot2;
  private Generator asmCurrent;
  private Generator aspectJBcel;
  private Generator bcel;
  private Generator cojen;
  private Generator csgBytecode;
  private Generator gnuByteCode;
  private Generator jclassLib;
  private Generator jiapi;
  private Generator mozillaClassFile;

  public GeneratorBenchmark() {
    super("org.objectweb.asm.benchmarks.AsmGenerator");
  }

  /**
   * Prepares the benchmark by creating a {@link Generator} for each library to be tested.
   *
   * @throws Exception if an error occurs.
   */
  @Setup
  public void prepare() throws Exception {
    asm4dot0 = (Generator) new AsmBenchmarkFactory(AsmVersion.V4_0).newAsmBenchmark();
    asm5dot0 = (Generator) new AsmBenchmarkFactory(AsmVersion.V5_0).newAsmBenchmark();
    asm6dot0 = (Generator) new AsmBenchmarkFactory(AsmVersion.V6_0).newAsmBenchmark();
    asm6dot1 = (Generator) new AsmBenchmarkFactory(AsmVersion.V6_1).newAsmBenchmark();
    asm6dot2 = (Generator) new AsmBenchmarkFactory(AsmVersion.V6_2).newAsmBenchmark();
    asmCurrent = (Generator) new AsmBenchmarkFactory(AsmVersion.V_CURRENT).newAsmBenchmark();
    aspectJBcel = new AspectjBcelGenerator();
    bcel = new BcelGenerator();
    cojen = new CojenGenerator();
    csgBytecode = new CsgBytecodeGenerator();
    gnuByteCode = new GnuByteCodeGenerator();
    jclassLib = new JClassLibGenerator();
    jiapi = new JiapiGenerator();
    mozillaClassFile = new MozillaClassFileGenerator();

    // Check that the correct versions of ASM have been loaded.
    if (!asm4dot0.getVersion().equals("ASM4")
        || !asm5dot0.getVersion().equals("ASM5")
        || !asm6dot0.getVersion().equals("ASM6")
        || !asm6dot1.getVersion().equals("ASM6")
        || !asm6dot2.getVersion().equals("ASM6")
        || !asmCurrent.getVersion().equals("ASM6")) {
      throw new IllegalStateException();
    }
  }

  @Benchmark
  public byte[] asm4_0() {
    return asm4dot0.generateClass();
  }

  @Benchmark
  public byte[] asm5_0() {
    return asm5dot0.generateClass();
  }

  @Benchmark
  public byte[] asm6_0() {
    return asm6dot0.generateClass();
  }

  @Benchmark
  public byte[] asm6_1() {
    return asm6dot1.generateClass();
  }

  @Benchmark
  public byte[] asm6_2() {
    return asm6dot2.generateClass();
  }

  @Benchmark
  public byte[] asmCurrent() {
    return asmCurrent.generateClass();
  }

  @Benchmark
  public byte[] aspectJBcel() {
    return aspectJBcel.generateClass();
  }

  @Benchmark
  public byte[] bcel() {
    return bcel.generateClass();
  }

  @Benchmark
  public byte[] cojen() {
    return cojen.generateClass();
  }

  @Benchmark
  public byte[] csgBytecode() {
    return csgBytecode.generateClass();
  }

  @Benchmark
  public byte[] gnuByteCode() {
    return gnuByteCode.generateClass();
  }

  @Benchmark
  public byte[] jclassLib() {
    return jclassLib.generateClass();
  }

  @Benchmark
  public byte[] jiapi() {
    return jiapi.generateClass();
  }

  @Benchmark
  public byte[] mozillaClassFile() {
    return mozillaClassFile.generateClass();
  }
}
