#region License Information /* HeuristicLab * Copyright (C) 2002-2012 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 . */ #endregion using System; using System.Drawing; using System.Threading; using HeuristicLab.Common; using HeuristicLab.Core; using HeuristicLab.Persistence.Default.CompositeSerializers.Storable; namespace HeuristicLab.Parameters { /// /// A base class for parameters. /// [Item("Parameter", "A base class for parameters.")] [StorableClass] public abstract class Parameter : NamedItem, IParameter, IStatefulItem { public override Image ItemImage { get { if ((dataType != null) && (typeof(IOperator).IsAssignableFrom(dataType))) return HeuristicLab.Common.Resources.VSImageLibrary.Method; else return base.ItemImage; } } public override bool CanChangeName { get { return false; } } public override bool CanChangeDescription { get { return false; } } [Storable] private Type dataType; public Type DataType { get { return dataType; } } [Storable(DefaultValue = false)] private bool hidden; public bool Hidden { get { return hidden; } set { if (value != hidden) { hidden = value; OnHiddenChanged(); } } } private Lazy> cachedActualValues; public IItem ActualValue { get { if (cachedActualValues.Value.Value == null) cachedActualValues.Value.Value = GetActualValue(); return cachedActualValues.Value.Value; } set { cachedActualValues.Value.Value = value; SetActualValue(value); } } private Lazy> executionContexts; public IExecutionContext ExecutionContext { get { return executionContexts.Value.Value; } set { if (value != executionContexts.Value.Value) { executionContexts.Value.Value = value; cachedActualValues.Value.Value = null; } } } [StorableConstructor] protected Parameter(bool deserializing) : base(deserializing) { cachedActualValues = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); executionContexts = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); } protected Parameter(Parameter original, Cloner cloner) : base(original, cloner) { dataType = original.dataType; hidden = original.hidden; cachedActualValues = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); executionContexts = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); } protected Parameter() : base("Anonymous") { dataType = typeof(IItem); hidden = false; cachedActualValues = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); executionContexts = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); } protected Parameter(string name, Type dataType) : base(name) { if (dataType == null) throw new ArgumentNullException(); this.dataType = dataType; hidden = false; cachedActualValues = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); executionContexts = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); } protected Parameter(string name, string description, Type dataType) : base(name, description) { if (dataType == null) throw new ArgumentNullException(); this.dataType = dataType; hidden = false; cachedActualValues = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); executionContexts = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); } public virtual void InitializeState() { } public virtual void ClearState() { cachedActualValues = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); executionContexts = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); } public override string ToString() { return Name; } protected abstract IItem GetActualValue(); protected abstract void SetActualValue(IItem value); public event EventHandler HiddenChanged; protected virtual void OnHiddenChanged() { EventHandler handler = HiddenChanged; if (handler != null) handler(this, EventArgs.Empty); } } }