#region License Information /* HeuristicLab * Copyright (C) 2002-2019 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.Linq; using System.Threading; using HeuristicLab.Common; using HeuristicLab.Core; using HeuristicLab.Persistence.Default.CompositeSerializers.Storable; namespace HeuristicLab.Operators { /// /// Base class for operators. /// [Item("Operator", "Base class for operators.")] [StorableClass] public abstract partial class Operator : ParameterizedNamedItem, IOperator, IStatefulItem { public static new Image StaticItemImage { get { return HeuristicLab.Common.Resources.VSImageLibrary.Method; } } public override Image ItemImage { get { if (Breakpoint) return HeuristicLab.Common.Resources.VSImageLibrary.BreakpointActive; else return base.ItemImage; } } public override bool CanChangeDescription { get { return false; } } private Lazy> executionContexts; protected IExecutionContext ExecutionContext { get { return executionContexts.Value.Value; } private set { if (value != executionContexts.Value.Value) { executionContexts.Value.Value = value; } } } private CancellationToken cancellationToken; protected CancellationToken CancellationToken { get { return cancellationToken; } } [Storable] private bool breakpoint; public bool Breakpoint { get { return breakpoint; } set { if (value != breakpoint) { breakpoint = value; OnBreakpointChanged(); OnItemImageChanged(); } } } [StorableConstructor] protected Operator(bool deserializing) : base(deserializing) { executionContexts = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); } protected Operator(Operator original, Cloner cloner) : base(original, cloner) { executionContexts = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); this.breakpoint = original.breakpoint; } protected Operator() : base() { executionContexts = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); breakpoint = false; } protected Operator(string name) : base(name) { executionContexts = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); breakpoint = false; } protected Operator(string name, ParameterCollection parameters) : base(name, parameters) { executionContexts = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); breakpoint = false; } protected Operator(string name, string description) : base(name, description) { executionContexts = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); breakpoint = false; } protected Operator(string name, string description, ParameterCollection parameters) : base(name, description, parameters) { executionContexts = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); breakpoint = false; } public virtual void InitializeState() { } public virtual void ClearState() { executionContexts = new Lazy>(() => { return new ThreadLocal(); }, LazyThreadSafetyMode.ExecutionAndPublication); } public virtual IOperation Execute(IExecutionContext context, CancellationToken cancellationToken) { try { ExecutionContext = context; this.cancellationToken = cancellationToken; foreach (ILookupParameter param in Parameters.OfType()) param.ExecutionContext = context; IOperation next = Apply(); OnExecuted(); return next; } finally { foreach (ILookupParameter param in Parameters.OfType()) param.ExecutionContext = null; ExecutionContext = null; } } public abstract IOperation Apply(); public event EventHandler BreakpointChanged; protected virtual void OnBreakpointChanged() { if (BreakpointChanged != null) { BreakpointChanged(this, EventArgs.Empty); } } public event EventHandler Executed; protected virtual void OnExecuted() { if (Executed != null) { Executed(this, EventArgs.Empty); } } } }