[2756] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[2790] | 3 | * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[2756] | 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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| 22 | using System;
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[2757] | 23 | using HeuristicLab.Common;
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[2756] | 24 | using HeuristicLab.Core;
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| 25 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 26 |
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| 27 | namespace HeuristicLab.Parameters {
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| 28 | /// <summary>
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[2890] | 29 | /// A parameter whose value is defined it the parameter itself. The value of the parameter can be null, if the parameter is not set.
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[2756] | 30 | /// </summary>
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[2890] | 31 | [Item("OptionalValueParameter<T>", "A parameter whose value is defined it the parameter itself. The value of the parameter can be null, if the parameter is not set.")]
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| 32 | public class OptionalValueParameter<T> : Parameter, IValueParameter<T> where T : class, IItem {
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[2756] | 33 | private T value;
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| 34 | [Storable]
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| 35 | public T Value {
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| 36 | get { return this.value; }
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| 37 | set {
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| 38 | if (value != this.value) {
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| 39 | if (this.value != null) this.value.Changed -= new ChangedEventHandler(Value_Changed);
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| 40 | this.value = value;
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| 41 | if (this.value != null) this.value.Changed += new ChangedEventHandler(Value_Changed);
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| 42 | OnValueChanged();
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| 43 | }
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| 44 | }
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| 45 | }
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[2796] | 46 | IItem IValueParameter.Value {
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[2757] | 47 | get { return Value; }
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[2796] | 48 | set {
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| 49 | T val = value as T;
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[2852] | 50 | if ((value != null) && (val == null))
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[2796] | 51 | throw new InvalidOperationException(
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| 52 | string.Format("Type mismatch. Value is not a \"{0}\".",
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| 53 | typeof(T).GetPrettyName())
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| 54 | );
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| 55 | Value = val;
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| 56 | }
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[2757] | 57 | }
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[2756] | 58 |
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[2890] | 59 | public OptionalValueParameter()
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[2756] | 60 | : base("Anonymous", typeof(T)) {
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| 61 | }
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[2890] | 62 | public OptionalValueParameter(string name)
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[2756] | 63 | : base(name, typeof(T)) {
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| 64 | }
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[2890] | 65 | public OptionalValueParameter(string name, T value)
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[2756] | 66 | : base(name, typeof(T)) {
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| 67 | Value = value;
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| 68 | }
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[2890] | 69 | public OptionalValueParameter(string name, string description)
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[2756] | 70 | : base(name, description, typeof(T)) {
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| 71 | }
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[2890] | 72 | public OptionalValueParameter(string name, string description, T value)
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[2756] | 73 | : base(name, description, typeof(T)) {
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| 74 | Value = value;
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| 75 | }
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| 76 |
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| 77 | public override IDeepCloneable Clone(Cloner cloner) {
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[2890] | 78 | OptionalValueParameter<T> clone = (OptionalValueParameter<T>)base.Clone(cloner);
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[2756] | 79 | clone.Value = (T)cloner.Clone(value);
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| 80 | return clone;
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| 81 | }
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| 82 |
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| 83 | public override string ToString() {
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[2818] | 84 | return string.Format("{0}: {1} ({2})", Name, Value != null ? Value.ToString() : "null", DataType.GetPrettyName());
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[2756] | 85 | }
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| 86 |
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[2757] | 87 | protected override IItem GetActualValue() {
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| 88 | return Value;
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| 89 | }
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| 90 | protected override void SetActualValue(IItem value) {
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[2796] | 91 | ((IValueParameter)this).Value = value;
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[2757] | 92 | }
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| 93 |
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[2756] | 94 | public event EventHandler ValueChanged;
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| 95 | private void OnValueChanged() {
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| 96 | if (ValueChanged != null)
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[2793] | 97 | ValueChanged(this, EventArgs.Empty);
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[2756] | 98 | OnChanged();
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| 99 | }
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| 100 | private void Value_Changed(object sender, ChangedEventArgs e) {
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| 101 | OnChanged(e);
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| 102 | }
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| 103 | }
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| 104 | }
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