1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2014 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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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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23 | using System.Text;
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24 | using System.Text.RegularExpressions;
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25 | using HeuristicLab.Persistence.Core;
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26 |
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27 | namespace HeuristicLab.Persistence.Default.Xml.Primitive {
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28 |
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29 | /// <summary>
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30 | /// Serializes a string to XML by embedding into a CDATA block.
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31 | /// </summary>
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32 | public sealed class String2XmlSerializer : PrimitiveXmlSerializerBase<string> {
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33 |
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34 | /// <summary>
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35 | /// Formats the specified string.
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36 | /// </summary>
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37 | /// <param name="s">The string.</param>
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38 | /// <returns>An XmlString that embeds the string s in a CDATA section.</returns>
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39 | public override XmlString Format(string s) {
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40 | StringBuilder sb = new StringBuilder();
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41 | sb.Append("<![CDATA[");
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42 | sb.Append(s.Replace("]]>", "]]]]><![CDATA[>"));
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43 | sb.Append("]]>");
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44 | s = special.Replace(sb.ToString(), m => ToBase64Tag(m.Value));
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45 | return new XmlString(s);
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46 | }
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47 |
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48 | private static readonly Regex re = new Regex(@"<!\[CDATA\[((?:[^]]|\](?!\]>))*)\]\]>|<Base64>([^<]*)</Base64>", RegexOptions.Singleline);
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49 | private static readonly Regex special = new Regex(@"[\x00-\x08\x0b\x0c\x0e-\x1f]+", RegexOptions.Singleline);
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50 |
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51 | private static string ToBase64Tag(string s) {
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52 | return new StringBuilder()
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53 | .Append("]]><Base64>")
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54 | .Append(Convert.ToBase64String(Encoding.ASCII.GetBytes(s)))
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55 | .Append("</Base64><![CDATA[")
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56 | .ToString();
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57 | }
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58 |
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59 | /// <summary>
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60 | /// Parses the specified XmlString into a string.
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61 | /// </summary>
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62 | /// <param name="x">The XMLString.</param>
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63 | /// <returns>The plain string contained in the XML CDATA section.</returns>
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64 | public override string Parse(XmlString x) {
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65 | StringBuilder sb = new StringBuilder();
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66 | foreach (Match m in re.Matches(x.Data)) {
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67 | if (m.Groups[1].Success)
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68 | sb.Append(m.Groups[1].Value);
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69 | else if (m.Groups[2].Success) {
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70 | sb.Append(Encoding.ASCII.GetString(Convert.FromBase64String(m.Groups[2].Value)));
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71 | }
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72 | }
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73 | string result = sb.ToString();
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74 | if (result.Length == 0 && x.Data.Length > 0 && !x.Data.Equals("<![CDATA[]]>"))
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75 | throw new PersistenceException("Invalid CDATA section during string parsing.");
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76 | return result;
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77 | }
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78 | }
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79 | } |
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