1 | #region License Information
|
---|
2 | /* HeuristicLab
|
---|
3 | * Copyright (C) 2002-2019 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 | using System;
|
---|
22 | using System.Collections.Generic;
|
---|
23 | using System.Globalization;
|
---|
24 | using System.Linq;
|
---|
25 | using System.Text.RegularExpressions;
|
---|
26 |
|
---|
27 | namespace HeuristicLab.Problems.DataAnalysis {
|
---|
28 | public static class IntervalConstraintsParser {
|
---|
29 |
|
---|
30 | public static IEnumerable<IntervalConstraint> ParseInput(string inputText, string target, IEnumerable<string> variables) {
|
---|
31 |
|
---|
32 | if (string.IsNullOrEmpty(inputText)) throw new ArgumentNullException("No input text has been provided.");
|
---|
33 | if (string.IsNullOrEmpty(target)) throw new ArgumentNullException("No target variable has been provided.");
|
---|
34 | if (variables == null) throw new ArgumentNullException("No variables have been provided.");
|
---|
35 | if (!variables.Any()) throw new ArgumentException("Variables are empty.");
|
---|
36 |
|
---|
37 | var lines = inputText.Split(new[] { "\r\n", "\r", "\n" }, StringSplitOptions.None);
|
---|
38 | foreach (var line in lines) {
|
---|
39 | var trimmedLine = line.TrimStart();
|
---|
40 | //Check for target-variable constraint
|
---|
41 | if (trimmedLine.StartsWith("Target:")) {
|
---|
42 | var start = "Target:".Length;
|
---|
43 | var end = trimmedLine.Length;
|
---|
44 | var targetConstraint = trimmedLine.Substring(start, end - start);
|
---|
45 | var match = Regex.Match(targetConstraint,
|
---|
46 | @"(['](.*)[']|(.*[^\s]))\s*(\bin\b)\s*([\[])\s*(\S*)\s*(\.{2})\s*(\S*)\s*([\]])");
|
---|
47 | if (match.Success) {
|
---|
48 | if (match.Groups.Count != 10) {
|
---|
49 | throw new ArgumentException("The target-constraint is not complete.", line);
|
---|
50 | } else {
|
---|
51 | var targetVariable = match.Groups[1].Value.Trim();
|
---|
52 | if (match.Groups[1].Value.Trim().StartsWith("'") && match.Groups[1].Value.Trim().EndsWith("'")) {
|
---|
53 | targetVariable = targetVariable.Substring(1, targetVariable.Length - 2);
|
---|
54 | }
|
---|
55 |
|
---|
56 | if (targetVariable != target) {
|
---|
57 | throw new ArgumentException($"The target variable {targetVariable} does not match the provided target {target}.", line);
|
---|
58 | }
|
---|
59 |
|
---|
60 | var lowerBound = ParseIntervalBounds(match.Groups[6].Value);
|
---|
61 | var upperBound = ParseIntervalBounds(match.Groups[8].Value);
|
---|
62 | var expression = "Target:" + match.Groups[0].Value;
|
---|
63 | var parsedTarget = match.Groups[1].Value.Trim();
|
---|
64 | var variable = targetVariable;
|
---|
65 | var isEnabled = true;
|
---|
66 | var numberOfDerivation = 0;
|
---|
67 | var interval = new Interval(lowerBound, upperBound);
|
---|
68 |
|
---|
69 | var constraint = new IntervalConstraint(expression, variable, parsedTarget, numberOfDerivation, interval, isEnabled);
|
---|
70 |
|
---|
71 | yield return constraint;
|
---|
72 | }
|
---|
73 | } else {
|
---|
74 | throw new ArgumentException("The inserted target constraint is not valid.", line);
|
---|
75 | }
|
---|
76 | //Check for derivation
|
---|
77 | } else if (trimmedLine.StartsWith("d") || trimmedLine.StartsWith("\u2202")) {
|
---|
78 | var match = Regex.Match(trimmedLine,
|
---|
79 | @"([d∂])([²³]?)\s*(['](.*)[']|(.*[^\s]))\s*(\/)\s*([d∂])\s*(['](.*)[']|(.*[^\s²³]))\s*([²³]?)\s*\bin\b\s*([\[])\s*(\S*)\s*(\.{2})\s*(\S*)\s*([\]])");
|
---|
80 |
|
---|
81 | if (match.Success) {
|
---|
82 | if (match.Groups.Count != 17) {
|
---|
83 | throw new ArgumentException("The given derivation-constraint is not complete.", line);
|
---|
84 | } else {
|
---|
85 | var derivationTarget = match.Groups[3].Value.Trim();
|
---|
86 | var derivationVariable = match.Groups[8].Value.Trim();
|
---|
87 |
|
---|
88 | if (match.Groups[3].Value.Trim().StartsWith("'") && match.Groups[3].Value.Trim().EndsWith("'")) {
|
---|
89 | derivationTarget = derivationTarget.Substring(1, derivationTarget.Length - 2);
|
---|
90 | }
|
---|
91 | if (match.Groups[8].Value.Trim().StartsWith("'") && match.Groups[8].Value.Trim().EndsWith("'")) {
|
---|
92 | derivationVariable = derivationVariable.Substring(1, derivationVariable.Length - 2);
|
---|
93 | }
|
---|
94 |
|
---|
95 | if (derivationTarget != target) {
|
---|
96 | throw new ArgumentException($"The target variable {derivationTarget} does not match the provided target {target}.", line);
|
---|
97 | }
|
---|
98 |
|
---|
99 | if (variables.All(v => v != derivationVariable)) {
|
---|
100 | throw new ArgumentException($"The given variable {derivationVariable} does not exist in the dataset.", line);
|
---|
101 | }
|
---|
102 |
|
---|
103 | if (match.Groups[2].Value.Trim() != "" || match.Groups[11].Value.Trim() != "") {
|
---|
104 | if (match.Groups[2].Value.Trim() == "" || match.Groups[11].Value.Trim() == "")
|
---|
105 | throw new ArgumentException("Number of derivation has to be written on both sides.", line);
|
---|
106 | if (match.Groups[2].Value.Trim() != match.Groups[11].Value.Trim())
|
---|
107 | throw new ArgumentException("Derivation number is not equal on both sides.", line);
|
---|
108 | }
|
---|
109 |
|
---|
110 | var lowerBound = ParseIntervalBounds(match.Groups[13].Value);
|
---|
111 | var upperBound = ParseIntervalBounds(match.Groups[15].Value);
|
---|
112 | var expression = match.Groups[0].Value;
|
---|
113 | var parsedTarget = derivationTarget;
|
---|
114 | var isEnabled = true;
|
---|
115 | var variable = derivationVariable;
|
---|
116 | var numberOfDerivation = ParseDerivationCount(match.Groups[2].Value.Trim());
|
---|
117 | var interval = new Interval(lowerBound, upperBound);
|
---|
118 |
|
---|
119 | var constraint = new IntervalConstraint(expression, variable, parsedTarget, numberOfDerivation, interval, isEnabled);
|
---|
120 |
|
---|
121 | yield return constraint;
|
---|
122 | }
|
---|
123 | } else {
|
---|
124 | throw new ArgumentException("The inserted derivation constraint is not valid.", line);
|
---|
125 | }
|
---|
126 | //Check for comment
|
---|
127 | } else if (trimmedLine.StartsWith("#") || trimmedLine == "") {
|
---|
128 | //If it is a comment just continue without saving anything
|
---|
129 | continue;
|
---|
130 | } else {
|
---|
131 | throw new ArgumentException("Error at your constraints definition constraints have to start with (Target: | d | \u2202 | #)", line);
|
---|
132 | }
|
---|
133 | }
|
---|
134 | }
|
---|
135 |
|
---|
136 | private static double ParseIntervalBounds(string input) {
|
---|
137 | input = input.ToLower();
|
---|
138 | switch (input) {
|
---|
139 | case "+inf.":
|
---|
140 | case "inf.":
|
---|
141 | return double.PositiveInfinity;
|
---|
142 | case "-inf.":
|
---|
143 | return double.NegativeInfinity;
|
---|
144 | default: {
|
---|
145 | if (double.TryParse(input, NumberStyles.Any, CultureInfo.InvariantCulture, out var value)) {
|
---|
146 | return value;
|
---|
147 | } else {
|
---|
148 | throw new ArgumentException("The given boundary is not a double value!");
|
---|
149 | }
|
---|
150 | }
|
---|
151 | }
|
---|
152 | }
|
---|
153 |
|
---|
154 | private static int ParseDerivationCount(string input) {
|
---|
155 | switch (input) {
|
---|
156 | case "":
|
---|
157 | return 1;
|
---|
158 | case "²":
|
---|
159 | return 2;
|
---|
160 | case "³":
|
---|
161 | return 3;
|
---|
162 | default:
|
---|
163 | int.TryParse(input, out var value);
|
---|
164 | return value;
|
---|
165 | }
|
---|
166 | }
|
---|
167 | }
|
---|
168 | }
|
---|