source: branches/HeuristicLab.DataImporter/HeuristicLab.DataImporter.Data/DataSetState.cs @ 6133

using System;

namespace HeuristicLab.DataImporter.Data {
  [Flags]
  public enum ColumnGroupState {
    None = 0,
    Active = 1,
    ColumnSelected = 2 | Active,
    DoubleColumnSelected = 4 | ColumnSelected,
    DateTimeColumnSelected = 8 | ColumnSelected,
    StringColumnSelected = 16 | ColumnSelected,
    ProgrammableColumnSelected = 32 | ColumnSelected,
    AnySelectedColumnContainsNull = 64 | ColumnSelected,
    Sorted = 128 | Active,
    AnySelectedColumnNotSorted = 256 | Sorted | ColumnSelected
  }

  public class DataSetState {
    public DataSetState(int activeColumnGroups, ColumnGroupState state)
      : this(activeColumnGroups, -1, state) {
    }

    public DataSetState(int activeColumnGroups, int selectedColumns, ColumnGroupState state) {
      this.selectedColumns = selectedColumns;
      this.activeColumnGroups = activeColumnGroups;
      this.state = state;
    }

    private int activeColumnGroups;
    public int ActiveColumnGroups {
      get { return this.activeColumnGroups; }
    }

    private int minActiveColumnGroups = int.MaxValue;
    public int MinActiveColumnGroups {
      get { return minActiveColumnGroups; }
      set { minActiveColumnGroups = value; }
    }

    //only meaningful if activeColumnGroups == 1
    private int selectedColumns;
    public int SelectedColumns {
      get { return activeColumnGroups == 1 ? this.selectedColumns : -1; } //throw Exception instead of return -1
      set { this.selectedColumns = value; }
    }

    private ColumnGroupState state;
    public ColumnGroupState State {
      get { return this.state; }
    }

    public void AddColumnGroupState(ColumnGroupState state) {
      if (state == ColumnGroupState.None)
        return;
      activeColumnGroups++;
      if (this.state == ColumnGroupState.None)
        this.state = state;
      else
        this.state &= state;
    }

    public bool Enabled(DataSetState other) {
      if (this.activeColumnGroups == 0)
        return true;
      else if (other.activeColumnGroups != this.activeColumnGroups)
        if (other.activeColumnGroups >= minActiveColumnGroups) return true;
        else return false;
      else if (SelectedColumns != -1 && other.SelectedColumns != SelectedColumns)
        return false;
      return (this.state & other.state) == this.state;
    }

    public override bool Equals(object obj) {
      if (obj == this)
        return true;
      else if(obj is DataSetState) {
        DataSetState other = (DataSetState)obj;
        return
          other.activeColumnGroups == this.activeColumnGroups &&
          other.state == this.state &&
          this.selectedColumns == other.selectedColumns;
      }
      return false;
    }

    public override int GetHashCode() {
      return this.activeColumnGroups.GetHashCode() ^ this.state.GetHashCode() ^ this.selectedColumns.GetHashCode();
    }

  }
}