source: branches/DataPreprocessing/HeuristicLab.DataPreprocessing/3.3/Implementations/Filter/ComparisonFilter.cs @ 10587

#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2013 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System.Drawing;
using HeuristicLab.Common.Resources;
using HeuristicLab.Core;
using System;
using System.Collections;
using HeuristicLab.Common;

namespace HeuristicLab.DataPreprocessing.Filter
{
    [Item("ComparisonFilter", "Represents the comparison Filter.")]
    public class ComparisonFilter : ComparisonConstraint, IFilter
    {


        protected ComparisonFilter(bool deserializing) : base(deserializing) { }

        protected ComparisonFilter(ComparisonFilter original, Cloner cloner)
            : base(original, cloner)
        {
            constraintColumn = original.constraintColumn;
        }
        public override IDeepCloneable Clone(Cloner cloner)
        {
            return new ComparisonFilter(this, cloner);
        }

        public ComparisonFilter() : base() { }
        public ComparisonFilter(IPreprocessingData constrainedValue, ConstraintOperation constraintOperation, object constraintData)
            : base(constrainedValue, constraintOperation, constraintData)
        {
        }

        public ComparisonFilter(IPreprocessingData constrainedValue, ConstraintOperation constraintOperation, object constraintData, bool active)
            : base(constrainedValue, constraintOperation, constraintData, active)
        {
        }


        public override string ItemName
        {
            get { return "ComparisonFilter"; }
        }

        public override Image ItemImage
        {
            get { return VSImageLibrary.Filter; }
        }

        public new IPreprocessingData ConstrainedValue
        {
            get { return (IPreprocessingData)base.ConstrainedValue; }
            set { base.ConstrainedValue = value; }
        }

        public new IStringConvertibleValue ConstraintData
        {
            get { return (IStringConvertibleValue)base.ConstraintData; }
            set
            {
                if (!(value is IComparable))
                    throw new ArgumentException("Only IComparables allowed for ConstraintData");
                base.ConstraintData = value;
            }
        }


        private int constraintColumn;
        public int ConstraintColumn
        {
            get { return constraintColumn; }
            set
            {
                if (ConstrainedValue.Columns < value)
                    throw new ArgumentException("Could not set ConstraintData to not existing column index.");

                if (constraintColumn != value)
                {
                    constraintColumn = value;
                    this.OnConstraintColumnChanged();
                    this.OnToStringChanged();
                }
            }
        }


        protected override bool Check(object constrainedMember)
        {
            if (!Active)
                return false;

            for (int row = 0; row < ConstrainedValue.Rows; ++row)
            {

                object item = null;
                if (ConstrainedValue.IsType<double>(constraintColumn))
                {
                    item = ConstrainedValue.GetCell<double>(ConstraintColumn, row);
                }
                else if (ConstrainedValue.IsType<DateTime>(constraintColumn))
                {
                    item = ConstrainedValue.GetCell<DateTime>(ConstraintColumn, row);
                }
                else
                {
                    item = ConstrainedValue.GetCell<string>(ConstraintColumn, row);
                }

                if (base.Check(item))
                    return true;

            }

            return false;
        }

        protected override bool Check(object constrainedMember, out string errorMessage)
        {
            errorMessage = string.Empty;
            return this.Check(constrainedMember);
        }

        public event EventHandler ConstraintColumnChanged;
        protected virtual void OnConstraintColumnChanged()
        {
            EventHandler handler = ConstraintColumnChanged;
            if (handler != null)
                handler(this, EventArgs.Empty);
        }
    }
}