source: branches/PushGP/HeuristicLab.PushGP/HeuristicLab.Problem.ProgramSynthesis.BenchmarkSuite/BenchmarkSuiteDataDescriptor.cs @ 14897

namespace HeuristicLab.BenchmarkSuite {
  using System.Collections.Generic;
  using System.IO;
  using System.IO.Compression;
  using System.Linq;
  using System.Reflection;
  using System.Text.RegularExpressions;
  using HeuristicLab.BenchmarkSuite.Problems;

  using Microsoft.VisualBasic.FileIO;


  public abstract class BenchmarkSuiteDataDescriptor : IBenchmarkSuiteDataDescriptor {
    private const string InstanceArchiveName = "HeuristicLab.BenchmarkSuite.Data.BenchmarkExamples.zip";
    private const string ResourcePath = @".*\.Data\.";
    private const string ExampleFieldDelimiter = ",";

    private Example[] examples;

    protected Example[] CloneExamples() {
      if (examples == null) examples = ParseData().ToArray();
      return examples.Select(e => (Example)e.Clone()).ToArray();
    }

    public abstract ProblemData CreateProblemData();

    protected abstract string FileName { get; }
    public abstract string Name { get; }
    public abstract string Description { get; }
    protected abstract int InputArgumentCount { get; }
    protected abstract int OutputArgumentCount { get; }

    protected abstract Example ParseExample(string[] input, string[] output);

    private IEnumerable<Example> ParseData() {
      using (var file = GetType().Assembly.GetManifestResourceStream(InstanceArchiveName))
      using (var archive = new ZipArchive(file, ZipArchiveMode.Read)) {
        var entry = archive.Entries.SingleOrDefault(x => x.Name == FileName);

        using (var parser = new TextFieldParser(entry.Open())) {
          parser.TextFieldType = FieldType.Delimited;
          parser.SetDelimiters(ExampleFieldDelimiter);
          parser.HasFieldsEnclosedInQuotes = true;
          parser.TrimWhiteSpace = false;

          //Processing rows
          while (!parser.EndOfData) {
            var fields = parser.ReadFields();

            if (fields.Length != InputArgumentCount + OutputArgumentCount)
              throw new InvalidDataException("Number of values do not fit");

            var input = fields.Take(InputArgumentCount).ToArray();
            var output = fields.Skip(InputArgumentCount).ToArray();

            yield return ParseExample(input, output);
          }
        }
      }
    }

    protected static string GetResourceName(string fileName) {
      return Assembly
          .GetExecutingAssembly()
          .GetManifestResourceNames()
          .SingleOrDefault(x => Regex.Match(x, ResourcePath + fileName).Success);
    }
  }
}