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source: trunk/sources/HeuristicLab.Core/Interfaces/IOperator.cs @ 820

Last change on this file since 820 was 776, checked in by vdorfer, 16 years ago

Created API documentation for HeuristicLab.Core namespace (#331)

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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2008 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
23using System.Collections.Generic;
24using System.Text;
25
26namespace HeuristicLab.Core {
27  /// <summary>
28  /// Interface to represent an operator (e.g. GreaterThanComparator,...),
29  /// a basic instruction of an algorithm.
30  /// </summary>
31  public interface IOperator : IConstrainedItem {
32    /// <summary>
33    /// Gets or sets the name of the current instance.
34    /// </summary>
35    string Name { get; set; }
36    /// <summary>
37    /// Gets or sets the description of the current instance.
38    /// </summary>
39    string Description { get; }
40
41    /// <summary>
42    /// Gets information whether the current operator has been canceled.
43    /// </summary>
44    bool Canceled { get; }
45    /// <summary>
46    /// Gets or sets a boolean value whether the engine should stop here during the run.
47    /// </summary>
48    bool Breakpoint { get; set; }
49
50    /// <summary>
51    /// Gets a list of all sub operators.
52    /// </summary>
53    IList<IOperator> SubOperators { get; }
54    /// <summary>
55    /// Gets a collection of all variable (parameter) infos.
56    /// </summary>
57    ICollection<IVariableInfo> VariableInfos { get; }
58    /// <summary>
59    /// Gets a collection of all variables of the current operator.
60    /// </summary>
61    ICollection<IVariable> Variables { get; }
62
63    /// <summary>
64    /// Adds the given sub operator to the current instance.
65    /// </summary>
66    /// <param name="op">The operator to add.</param>
67    void AddSubOperator(IOperator op);
68    /// <summary>
69    /// Adds the given sub operator to the current instance if all constraints can be fulfilled.
70    /// </summary>
71    /// <param name="op">The operator to add.</param>
72    /// <returns><c>true</c> if the operator could be added without violating constraints,
73    /// <c>false</c> otherwise.</returns>
74    bool TryAddSubOperator(IOperator op);
75    /// <summary>
76    /// Adds the given sub operator to the current instance if all constraints can be fulfilled.
77    /// </summary>
78    /// <param name="op">The operator to add.</param>
79    /// <param name="violatedConstraints">Output parameter; contains all constraints that could not be
80    /// fulfilled.</param>
81    /// <returns><c>true</c> if the operator could be added without violating constraints,
82    /// <c>false</c> otherwise.</returns>
83    bool TryAddSubOperator(IOperator op, out ICollection<IConstraint> violatedConstraints);
84    /// <summary>
85    /// Adds the given sub operator at a the specified <paramref name="index"/>.
86    /// </summary>
87    /// <param name="op">The operator to add.</param>
88    /// <param name="index">The position where to add the operator.</param>
89    void AddSubOperator(IOperator op, int index);
90    /// <summary>
91    /// Adds the given operator at the specified <paramref name="index"/> to the current instance
92    /// if all constraints can be fulfilled.
93    /// </summary>
94    /// <param name="op">The operator to add.</param>
95    /// <param name="index">The position where to add the operator.</param>
96    /// <returns><c>true</c> if the operator could be added without violating constraints,
97    /// <c>false</c> otherwise.</returns>
98    bool TryAddSubOperator(IOperator op, int index);
99    /// <summary>
100    /// Adds the given operator at the specified <paramref name="index"/> to the current instance
101    /// if all constraints can be fulfilled.
102    /// </summary>
103    /// <param name="op">The operator to add.</param>
104    /// <param name="index">The position where to add the operator.</param>
105    /// <param name="violatedConstraints">Output parameter; contains all constraints that could not be
106    /// fulfilled.</param>
107    /// <returns><c>true</c> if the operator could be added without violating constraints,
108    /// <c>false</c> otherwise.</returns>
109    bool TryAddSubOperator(IOperator op, int index, out ICollection<IConstraint> violatedConstraints);
110    /// <summary>
111    /// Removes a sub operator at the specified <paramref name="index"/>.
112    /// </summary>
113    /// <param name="index">The position where to delete the operator.</param>
114    void RemoveSubOperator(int index);
115    /// <summary>
116    /// Removes a sub operator at the specified <paramref name="index"/> if all constraint can be fulfilled.
117    /// </summary>
118    /// <param name="index">The position where to delete the operator.</param>
119    /// <returns><c>true</c> if the operator could be deleted without violating constraints,
120    /// <c>false</c> otherwise.</returns>
121    bool TryRemoveSubOperator(int index);
122    /// <summary>
123    /// Deletes the operator at the specified <paramref name="index"/> 
124    /// if all constraints can be fulfilled.
125    /// </summary>
126    /// <param name="index">The position where to delete the operator.</param>
127    /// <param name="violatedConstraints">Output parameter; contains all constraints that could not be
128    /// fulfilled.</param>
129    /// <returns><c>true</c> if the operator could be deleted without violating constraints,
130    /// <c>false</c> otherwise.</returns>
131    bool TryRemoveSubOperator(int index, out ICollection<IConstraint> violatedConstraints);
132
133    /// <summary>
134    /// Gets the variable info with the given <paramref name="formalName"/>.
135    /// </summary>
136    /// <param name="formalName">The formal name of the variable info.</param>
137    /// <returns>The variable info with the specified formal name.</returns>
138    IVariableInfo GetVariableInfo(string formalName);
139    /// <summary>
140    /// Adds the specified variable info to the current instance.
141    /// </summary>
142    /// <param name="variableInfo">The variable info to add.</param>
143    void AddVariableInfo(IVariableInfo variableInfo);
144    /// <summary>
145    /// Adds the specified variable info to the current instance, if all constraints can be fulfilled.
146    /// </summary>
147    /// <param name="variableInfo">The variable info to add.</param>
148    /// <returns><c>true</c> if the variable info could be added without violating constraints,
149    /// <c>false</c> otherwise.</returns>
150    bool TryAddVariableInfo(IVariableInfo variableInfo);
151    /// <summary>
152    /// Adds the specified variable info to the current instance, if all constraints can be fulfilled.
153    /// </summary>
154    /// <param name="variableInfo">The variable info to add.</param>
155    /// <param name="violatedConstraints">Output parameter; contains all constraints that could not be
156    /// fulfilled.</param>
157    /// <returns><c>true</c> if the variable info could be added without violating constraints,
158    /// <c>false</c> otherwise.</returns>
159    bool TryAddVariableInfo(IVariableInfo variableInfo, out ICollection<IConstraint> violatedConstraints);
160    /// <summary>
161    /// Removes the variable info with the given formal name.
162    /// </summary>
163    /// <param name="formalName">The formal name of the variable info to remove.</param>
164    void RemoveVariableInfo(string formalName);
165    /// <summary>
166    /// Deletes the variable info with the given formal name,
167    /// if all constraints can be fulfilled.
168    /// </summary>
169    /// <param name="formalName">The formal name of the variable info to remove.</param>
170    /// <returns><c>true</c> if the variable info could be deleted without violating constraints,
171    /// <c>false</c> otherwise.</returns>
172    bool TryRemoveVariableInfo(string formalName);
173    /// <summary>
174    /// Deletes the variable info with the given formal name,
175    /// if all constraints can be fulfilled.
176    /// </summary>
177    /// <param name="formalName">The formal name of the variable info to remove.</param>
178    /// <param name="violatedConstraints">Output parameter; contains all constraints that could not be
179    /// fulfilled.</param>
180    /// <returns><c>true</c> if the variable info could be deleted without violating constraints,
181    /// <c>false</c> otherwise.</returns>
182    bool TryRemoveVariableInfo(string formalName, out ICollection<IConstraint> violatedConstraints);
183
184    /// <summary>
185    /// Gets a variable with the given <paramref name="name"/>.
186    /// </summary>
187    /// <param name="name">The name of the variable.</param>
188    /// <returns>The variable with the specified name.</returns>
189    IVariable GetVariable(string name);
190    /// <summary>
191    /// Adds the specified <paramref name="variable"/> to the current instance.
192    /// </summary>
193    /// <param name="variable">The variable to add.</param>
194    void AddVariable(IVariable variable);
195    /// <summary>
196    /// Adds the specified <paramref name="variable"/> to the current instance if all constraints can
197    /// be fulfilled.
198    /// </summary>
199    /// <param name="variable">The variable to add.</param>
200    /// <returns><c>true</c> if the variable could be added without violating constraints,
201    /// <c>false</c> otherwise.</returns>
202    bool TryAddVariable(IVariable variable);
203    /// <summary>
204    /// Adds the specified <paramref name="variable"/> to the current instance if all constraints can
205    /// be fulfilled.
206    /// </summary>
207    /// <param name="variable">The variable to add.</param>
208    /// <param name="violatedConstraints">Output parameter; contains all constraints that could
209    /// not be fulfillled.</param>
210    /// <returns><c>true</c> if the variable could be added without violating constraints,
211    /// <c>false</c> otherwise.</returns>
212    bool TryAddVariable(IVariable variable, out ICollection<IConstraint> violatedConstraints);
213    /// <summary>
214    /// Deletes the variable with the specified <paramref name="name"/>.
215    /// </summary>
216    /// <param name="name">The name of the variable to delete.</param>
217    void RemoveVariable(string name);
218    /// <summary>
219    /// Deletes the variable with the specified <paramref name="name"/> if all constraints can be
220    /// fulfilled.
221    /// </summary>
222    /// <param name="name">The name of the variable to remove.</param>
223    /// <returns><c>true</c> if the variable could be deleted without violating constraints,
224    /// <c>false</c> otherwise.</returns>
225    bool TryRemoveVariable(string name);
226    /// <summary>
227    /// Deletes the variable with the specified <paramref name="name"/> if all constraints can be
228    /// fulfilled.
229    /// </summary>
230    /// <param name="name">The name of the variable to remove.</param>
231    /// <param name="violatedConstraints">Output parameter; contains all constraints that could
232    /// not be fulfilled.</param>
233    /// <returns><c>true</c> if the variable could be deleted without violating constraints,
234    /// <c>false</c> otherwise.</returns>
235    bool TryRemoveVariable(string name, out ICollection<IConstraint> violatedConstraints);
236   
237    /// <inheritdoc cref="GetVariableValue(string, HeuristicLab.Core.IScope, bool)"/>
238    /// <typeparam name="T">The type of the value that is searched.</typeparam>       
239    T GetVariableValue<T>(string formalName, IScope scope, bool recursiveLookup) where T : class, IItem;
240    /// <inheritdoc cref="GetVariableValue(string, HeuristicLab.Core.IScope, bool, bool)"/>
241    /// <typeparam name="T">The type of the value that is searched.</typeparam>
242    T GetVariableValue<T>(string formalName, IScope scope, bool recursiveLookup, bool throwOnError) where T : class, IItem;
243    /// <inheritdoc cref="GetVariableValue(System.String, IScope, bool, bool)"
244    /// select="summary"/>
245    /// <param name="formalName">The formal name of the variable info whose variable value is searched.</param>
246    /// <param name="scope">The scope where to look for the variable.</param>
247    /// <param name="recursiveLookup">Boolean value, whether also the parent scopes shall be searched if
248    /// the variable is not found in the specified <paramref name="scope"/>.</param>
249    /// <returns>The value of the searched variable or null if it is not found.</returns>
250    IItem GetVariableValue(string formalName, IScope scope, bool recursiveLookup);
251    /// <summary>
252    /// Gets the value of the variable in the specified <paramref name="scope"/>
253    /// whose variable(parameter) info has the specified <paramref name="formalName"/>.
254    /// </summary>
255    /// <param name="formalName">The formal name of the variable info whose variable value is searched.</param>
256    /// <param name="scope">The scope where to look for the variable.</param>
257    /// <param name="recursiveLookup">Boolean value, whether also the parent scopes shall be searched if
258    /// the variable is not found in the specified <paramref name="scope"/>.</param>
259    /// <param name="throwOnError">Boolean value, whether an exception shall be thrown, if the variable
260    /// cannot be found or just <c>null</c> shall be returned.</param>
261    /// <returns>The value of the searched variable (or null if the variable is not
262    /// found and <paramref name="throwOnError"/> is set to false).</returns>
263    IItem GetVariableValue(string formalName, IScope scope, bool recursiveLookup, bool throwOnError);
264
265    /// <summary>
266    /// Executes the current instance on the specified <paramref name="scope"/>.
267    /// </summary>
268    /// <param name="scope">The scope where to execute the current instance.</param>
269    /// <returns>The next operation.</returns>
270    IOperation Execute(IScope scope);
271    /// <summary>
272    /// Aborts the current operator.
273    /// </summary>
274    void Abort();
275
276    /// <summary>
277    /// Occurs when the name of the operator was changed.
278    /// </summary>
279    event EventHandler NameChanged;
280    /// <summary>
281    /// Occurs when the breakpoint flag of the current instance was changed.
282    /// </summary>
283    event EventHandler BreakpointChanged;
284    /// <summary>
285    /// Occurs when a sub operator has been added.
286    /// </summary>
287    event EventHandler<OperatorIndexEventArgs> SubOperatorAdded;
288    /// <summary>
289    /// Occurs when a sub operator has been deleted.
290    /// </summary>
291    event EventHandler<OperatorIndexEventArgs> SubOperatorRemoved;
292    /// <summary>
293    /// Occurs when a variable info has been added.
294    /// </summary>
295    event EventHandler<VariableInfoEventArgs> VariableInfoAdded;
296    /// <summary>
297    /// Occurs when a variable info has been deleted.
298    /// </summary>
299    event EventHandler<VariableInfoEventArgs> VariableInfoRemoved;
300    /// <summary>
301    /// Occurs when a variable has been added.
302    /// </summary>
303    event EventHandler<VariableEventArgs> VariableAdded;
304    /// <summary>
305    /// Occurs when a variable has been deleted.
306    /// </summary>
307    event EventHandler<VariableEventArgs> VariableRemoved;
308    /// <summary>
309    /// Occurs when the current instance is executed.
310    /// </summary>
311    event EventHandler Executed;
312  }
313}
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