[2] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[7270] | 3 | * Copyright (C) 2002-2012 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[2] | 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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[2653] | 23 | using System.Drawing;
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[5193] | 24 | using System.Threading;
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[3376] | 25 | using HeuristicLab.Common;
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[2805] | 26 | using HeuristicLab.Core;
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[1823] | 27 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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[2] | 28 |
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[2805] | 29 | namespace HeuristicLab.Operators {
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[776] | 30 | /// <summary>
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[5193] | 31 | /// Base class for operators.
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[776] | 32 | /// </summary>
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[2664] | 33 | [Item("Operator", "Base class for operators.")]
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[3017] | 34 | [StorableClass]
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[6103] | 35 | public abstract class Operator : ParameterizedNamedItem, IOperator, IStatefulItem {
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[7270] | 36 | public static new Image StaticItemImage {
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| 37 | get { return HeuristicLab.Common.Resources.VSImageLibrary.Method; }
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| 38 | }
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[2653] | 39 | public override Image ItemImage {
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[3306] | 40 | get {
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[5287] | 41 | if (Breakpoint) return HeuristicLab.Common.Resources.VSImageLibrary.BreakpointActive;
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[7270] | 42 | else return base.ItemImage;
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[3306] | 43 | }
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[2653] | 44 | }
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[2684] | 45 | public override bool CanChangeDescription {
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| 46 | get { return false; }
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| 47 | }
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[1667] | 48 |
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[5193] | 49 | private Lazy<ThreadLocal<IExecutionContext>> executionContexts;
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[2834] | 50 | protected IExecutionContext ExecutionContext {
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[5193] | 51 | get { return executionContexts.Value.Value; }
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[2757] | 52 | private set {
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[5193] | 53 | if (value != executionContexts.Value.Value) {
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| 54 | executionContexts.Value.Value = value;
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[2757] | 55 | }
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| 56 | }
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| 57 | }
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[5193] | 58 | private CancellationToken cancellationToken;
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| 59 | protected CancellationToken CancellationToken {
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| 60 | get { return cancellationToken; }
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[2] | 61 | }
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[1667] | 62 |
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| 63 | [Storable]
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[2653] | 64 | private bool breakpoint;
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[2] | 65 | public bool Breakpoint {
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[2653] | 66 | get { return breakpoint; }
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[2] | 67 | set {
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[2653] | 68 | if (value != breakpoint) {
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| 69 | breakpoint = value;
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[2] | 70 | OnBreakpointChanged();
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[3306] | 71 | OnItemImageChanged();
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[2] | 72 | }
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| 73 | }
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| 74 | }
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| 75 |
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[4722] | 76 | [StorableConstructor]
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[5193] | 77 | protected Operator(bool deserializing)
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| 78 | : base(deserializing) {
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[6114] | 79 | executionContexts = new Lazy<ThreadLocal<IExecutionContext>>(() => { return new ThreadLocal<IExecutionContext>(); }, LazyThreadSafetyMode.ExecutionAndPublication);
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[5193] | 80 | }
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[4722] | 81 | protected Operator(Operator original, Cloner cloner)
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| 82 | : base(original, cloner) {
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[6114] | 83 | executionContexts = new Lazy<ThreadLocal<IExecutionContext>>(() => { return new ThreadLocal<IExecutionContext>(); }, LazyThreadSafetyMode.ExecutionAndPublication);
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[4722] | 84 | this.breakpoint = original.breakpoint;
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| 85 | }
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[2845] | 86 | protected Operator()
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| 87 | : base() {
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[6114] | 88 | executionContexts = new Lazy<ThreadLocal<IExecutionContext>>(() => { return new ThreadLocal<IExecutionContext>(); }, LazyThreadSafetyMode.ExecutionAndPublication);
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[2653] | 89 | breakpoint = false;
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[2] | 90 | }
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[2845] | 91 | protected Operator(string name)
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| 92 | : base(name) {
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[6114] | 93 | executionContexts = new Lazy<ThreadLocal<IExecutionContext>>(() => { return new ThreadLocal<IExecutionContext>(); }, LazyThreadSafetyMode.ExecutionAndPublication);
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[2845] | 94 | breakpoint = false;
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| 95 | }
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| 96 | protected Operator(string name, ParameterCollection parameters)
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| 97 | : base(name, parameters) {
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[6114] | 98 | executionContexts = new Lazy<ThreadLocal<IExecutionContext>>(() => { return new ThreadLocal<IExecutionContext>(); }, LazyThreadSafetyMode.ExecutionAndPublication);
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[2845] | 99 | breakpoint = false;
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| 100 | }
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| 101 | protected Operator(string name, string description)
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| 102 | : base(name, description) {
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[6114] | 103 | executionContexts = new Lazy<ThreadLocal<IExecutionContext>>(() => { return new ThreadLocal<IExecutionContext>(); }, LazyThreadSafetyMode.ExecutionAndPublication);
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[2845] | 104 | breakpoint = false;
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| 105 | }
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| 106 | protected Operator(string name, string description, ParameterCollection parameters)
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| 107 | : base(name, description, parameters) {
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[6114] | 108 | executionContexts = new Lazy<ThreadLocal<IExecutionContext>>(() => { return new ThreadLocal<IExecutionContext>(); }, LazyThreadSafetyMode.ExecutionAndPublication);
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[2845] | 109 | breakpoint = false;
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| 110 | }
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[2] | 111 |
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[6114] | 112 | public virtual void InitializeState() { }
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| 113 | public virtual void ClearState() {
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[6103] | 114 | executionContexts = new Lazy<ThreadLocal<IExecutionContext>>(() => { return new ThreadLocal<IExecutionContext>(); }, LazyThreadSafetyMode.ExecutionAndPublication);
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| 115 | }
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| 116 |
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[5193] | 117 | public virtual IOperation Execute(IExecutionContext context, CancellationToken cancellationToken) {
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[2740] | 118 | try {
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[2757] | 119 | ExecutionContext = context;
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[5193] | 120 | this.cancellationToken = cancellationToken;
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[2740] | 121 | foreach (IParameter param in Parameters)
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| 122 | param.ExecutionContext = context;
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[2834] | 123 | IOperation next = Apply();
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[2740] | 124 | OnExecuted();
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| 125 | return next;
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[6114] | 126 | }
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| 127 | finally {
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[2740] | 128 | foreach (IParameter param in Parameters)
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| 129 | param.ExecutionContext = null;
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[2757] | 130 | ExecutionContext = null;
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[2740] | 131 | }
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[2] | 132 | }
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[2834] | 133 | public abstract IOperation Apply();
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[2653] | 134 |
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[2] | 135 | public event EventHandler BreakpointChanged;
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| 136 | protected virtual void OnBreakpointChanged() {
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| 137 | if (BreakpointChanged != null) {
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[2793] | 138 | BreakpointChanged(this, EventArgs.Empty);
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[2] | 139 | }
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| 140 | }
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| 141 | public event EventHandler Executed;
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| 142 | protected virtual void OnExecuted() {
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| 143 | if (Executed != null) {
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[2793] | 144 | Executed(this, EventArgs.Empty);
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[2] | 145 | }
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| 146 | }
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| 147 | }
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| 148 | }
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