1 | using System.Collections.Generic;
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2 | using System;
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3 | using System.Text;
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4 | using HeuristicLab.Persistence.Interfaces;
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5 | using HeuristicLab.Persistence.Core;
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6 | using System.IO;
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7 | using ICSharpCode.SharpZipLib.Zip;
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8 | using HeuristicLab.Tracing;
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9 | using HeuristicLab.Persistence.Core.Tokens;
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10 | using System.IO.Compression;
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11 |
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12 | namespace HeuristicLab.Persistence.Default.Xml {
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13 |
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14 |
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15 | /// <summary>
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16 | /// Main entry point of persistence to XML. Use the static methods to serialize
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17 | /// to a file or to a stream.
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18 | /// </summary>
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19 | public class XmlGenerator : GeneratorBase<string> {
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20 |
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21 | private int depth;
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22 | private int Depth {
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23 | get {
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24 | return depth;
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25 | }
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26 | set {
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27 | depth = value;
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28 | prefix = new string(' ', depth * 2);
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29 | }
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30 | }
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31 |
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32 | private string prefix;
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33 |
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34 |
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35 | /// <summary>
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36 | /// Initializes a new instance of the <see cref="XmlGenerator"/> class.
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37 | /// </summary>
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38 | public XmlGenerator() {
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39 | Depth = 0;
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40 | }
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41 |
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42 | private enum NodeType { Start, End, Inline } ;
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43 |
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44 | private static void AddXmlTagContent(StringBuilder sb, string name, Dictionary<string, object> attributes) {
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45 | sb.Append(name);
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46 | foreach (var attribute in attributes) {
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47 | if (attribute.Value != null && !string.IsNullOrEmpty(attribute.Value.ToString())) {
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48 | sb.Append(' ');
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49 | sb.Append(attribute.Key);
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50 | sb.Append("=\"");
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51 | sb.Append(attribute.Value);
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52 | sb.Append('"');
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53 | }
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54 | }
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55 | }
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56 |
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57 | private static void AddXmlStartTag(StringBuilder sb, string name, Dictionary<string, object> attributes) {
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58 | sb.Append('<');
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59 | AddXmlTagContent(sb, name, attributes);
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60 | sb.Append('>');
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61 | }
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62 |
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63 | private static void AddXmlInlineTag(StringBuilder sb, string name, Dictionary<string, object> attributes) {
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64 | sb.Append('<');
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65 | AddXmlTagContent(sb, name, attributes);
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66 | sb.Append("/>");
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67 | }
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68 |
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69 | private static void AddXmlEndTag(StringBuilder sb, string name) {
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70 | sb.Append("</");
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71 | sb.Append(name);
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72 | sb.Append(">");
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73 | }
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74 |
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75 | private string CreateNodeStart(string name, Dictionary<string, object> attributes) {
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76 | StringBuilder sb = new StringBuilder();
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77 | sb.Append(prefix);
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78 | Depth += 1;
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79 | AddXmlStartTag(sb, name, attributes);
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80 | sb.Append("\r\n");
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81 | return sb.ToString();
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82 | }
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83 |
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84 | private string CreateNodeStart(string name) {
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85 | return CreateNodeStart(name, new Dictionary<string, object>());
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86 | }
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87 |
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88 | private string CreateNodeEnd(string name) {
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89 | Depth -= 1;
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90 | StringBuilder sb = new StringBuilder();
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91 | sb.Append(prefix);
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92 | AddXmlEndTag(sb, name);
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93 | sb.Append("\r\n");
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94 | return sb.ToString();
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95 | }
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96 |
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97 | private string CreateNode(string name, Dictionary<string, object> attributes) {
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98 | StringBuilder sb = new StringBuilder();
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99 | sb.Append(prefix);
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100 | AddXmlInlineTag(sb, name, attributes);
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101 | sb.Append("\r\n");
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102 | return sb.ToString();
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103 | }
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104 |
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105 | private string CreateNode(string name, Dictionary<string, object> attributes, string content) {
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106 | StringBuilder sb = new StringBuilder();
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107 | sb.Append(prefix);
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108 | AddXmlStartTag(sb, name, attributes);
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109 | sb.Append(content);
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110 | sb.Append("</").Append(name).Append(">\r\n");
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111 | return sb.ToString();
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112 | }
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113 |
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114 | protected override string Format(BeginToken beginToken) {
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115 | var dict = new Dictionary<string, object> {
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116 | {"name", beginToken.Name},
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117 | {"typeId", beginToken.TypeId},
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118 | {"id", beginToken.Id}};
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119 | AddTypeInfo(beginToken.TypeId, dict);
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120 | return CreateNodeStart(XmlStringConstants.COMPOSITE, dict);
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121 |
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122 | }
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123 |
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124 | private void AddTypeInfo(int typeId, Dictionary<string, object> dict) {
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125 | if (lastTypeToken != null) {
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126 | if (typeId == lastTypeToken.Id) {
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127 | dict.Add("typeName", lastTypeToken.TypeName);
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128 | dict.Add("serializer", lastTypeToken.Serializer);
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129 | lastTypeToken = null;
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130 | } else {
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131 | FlushTypeToken();
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132 | }
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133 | }
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134 | }
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135 |
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136 | protected override string Format(EndToken endToken) {
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137 | return CreateNodeEnd(XmlStringConstants.COMPOSITE);
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138 | }
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139 |
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140 | protected override string Format(PrimitiveToken dataToken) {
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141 | var dict = new Dictionary<string, object> {
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142 | {"typeId", dataToken.TypeId},
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143 | {"name", dataToken.Name},
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144 | {"id", dataToken.Id}};
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145 | AddTypeInfo(dataToken.TypeId, dict);
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146 | return CreateNode(XmlStringConstants.PRIMITIVE, dict,
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147 | ((XmlString)dataToken.SerialData).Data);
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148 | }
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149 |
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150 | protected override string Format(ReferenceToken refToken) {
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151 | return CreateNode(XmlStringConstants.REFERENCE,
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152 | new Dictionary<string, object> {
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153 | {"ref", refToken.Id},
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154 | {"name", refToken.Name}});
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155 | }
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156 |
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157 | protected override string Format(NullReferenceToken nullRefToken) {
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158 | return CreateNode(XmlStringConstants.NULL,
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159 | new Dictionary<string, object>{
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160 | {"name", nullRefToken.Name}});
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161 | }
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162 |
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163 | protected override string Format(MetaInfoBeginToken metaInfoBeginToken) {
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164 | return CreateNodeStart(XmlStringConstants.METAINFO);
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165 | }
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166 |
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167 | protected override string Format(MetaInfoEndToken metaInfoEndToken) {
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168 | return CreateNodeEnd(XmlStringConstants.METAINFO);
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169 | }
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170 |
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171 | private TypeToken lastTypeToken;
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172 | protected override string Format(TypeToken token) {
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173 | lastTypeToken = token;
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174 | return "";
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175 | }
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176 |
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177 | private string FlushTypeToken() {
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178 | if (lastTypeToken == null)
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179 | return "";
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180 | try {
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181 | return CreateNode(XmlStringConstants.TYPE,
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182 | new Dictionary<string, object> {
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183 | {"id", lastTypeToken.Id},
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184 | {"typeName", lastTypeToken.TypeName },
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185 | {"serializer", lastTypeToken.Serializer }});
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186 | } finally {
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187 | lastTypeToken = null;
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188 | }
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189 | }
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190 |
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191 | public IEnumerable<string> Format(List<TypeMapping> typeCache) {
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192 | yield return CreateNodeStart(XmlStringConstants.TYPECACHE);
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193 | foreach (var mapping in typeCache)
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194 | yield return CreateNode(
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195 | XmlStringConstants.TYPE,
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196 | mapping.GetDict());
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197 | yield return CreateNodeEnd(XmlStringConstants.TYPECACHE);
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198 | }
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199 |
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200 | /// <summary>
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201 | /// Serialize an object into a file.
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202 | ///
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203 | /// The XML configuration is obtained from the <c>ConfigurationService</c>.
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204 | /// The file is actually a ZIP file.
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205 | /// Compression level is set to 5 and needed assemblies are not included.
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206 | /// </summary>
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207 | public static void Serialize(object o, string filename) {
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208 | Serialize(o, filename, ConfigurationService.Instance.GetConfiguration(new XmlFormat()), false, 5);
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209 | }
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210 |
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211 | /// <summary>
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212 | /// Serialize an object into a file.
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213 | ///
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214 | /// The XML configuration is obtained from the <c>ConfigurationService</c>.
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215 | /// Needed assemblies are not included.
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216 | /// </summary>
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217 | /// <param name="compression">ZIP file compression level</param>
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218 | public static void Serialize(object o, string filename, int compression) {
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219 | Serialize(o, filename, ConfigurationService.Instance.GetConfiguration(new XmlFormat()), false, compression);
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220 | }
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221 |
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222 | public static void Serialize(object obj, string filename, Configuration config) {
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223 | Serialize(obj, filename, config, false, 5);
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224 | }
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225 |
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226 | public static void Serialize(object obj, string filename, Configuration config, bool includeAssemblies, int compression) {
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227 | try {
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228 | string tempfile = Path.GetTempFileName();
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229 | DateTime start = DateTime.Now;
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230 | using (FileStream stream = File.Create(tempfile)) {
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231 | Serializer serializer = new Serializer(obj, config);
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232 | serializer.InterleaveTypeInformation = false;
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233 | XmlGenerator generator = new XmlGenerator();
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234 | using (ZipOutputStream zipStream = new ZipOutputStream(stream)) {
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235 | zipStream.IsStreamOwner = false;
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236 | zipStream.SetLevel(compression);
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237 | zipStream.PutNextEntry(new ZipEntry("data.xml") { DateTime = DateTime.MinValue });
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238 | StreamWriter writer = new StreamWriter(zipStream);
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239 | foreach (ISerializationToken token in serializer) {
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240 | string line = generator.Format(token);
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241 | writer.Write(line);
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242 | }
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243 | writer.Flush();
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244 | zipStream.PutNextEntry(new ZipEntry("typecache.xml") { DateTime = DateTime.MinValue });
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245 | foreach (string line in generator.Format(serializer.TypeCache)) {
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246 | writer.Write(line);
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247 | }
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248 | writer.Flush();
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249 | if (includeAssemblies) {
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250 | foreach (string name in serializer.RequiredFiles) {
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251 | Uri uri = new Uri(name);
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252 | if (!uri.IsFile) {
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253 | Logger.Warn("cannot read non-local files");
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254 | continue;
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255 | }
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256 | zipStream.PutNextEntry(new ZipEntry(Path.GetFileName(uri.PathAndQuery)));
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257 | FileStream reader = File.OpenRead(uri.PathAndQuery);
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258 | byte[] buffer = new byte[1024 * 1024];
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259 | while (true) {
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260 | int bytesRead = reader.Read(buffer, 0, 1024 * 1024);
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261 | if (bytesRead == 0)
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262 | break;
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263 | zipStream.Write(buffer, 0, bytesRead);
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264 | }
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265 | writer.Flush();
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266 | }
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267 | }
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268 | }
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269 | }
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270 | Logger.Info(String.Format("serialization took {0} seconds with compression level {1}",
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271 | (DateTime.Now - start).TotalSeconds, compression));
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272 | File.Copy(tempfile, filename, true);
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273 | File.Delete(tempfile);
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274 | } catch (Exception) {
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275 | Logger.Warn("Exception caught, no data has been written.");
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276 | throw;
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277 | }
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278 | }
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279 |
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280 | public static void Serialize(object obj, Stream stream) {
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281 | Serialize(obj, stream, ConfigurationService.Instance.GetConfiguration(new XmlFormat()));
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282 | }
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283 |
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284 |
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285 | public static void Serialize(object obj, Stream stream, Configuration config) {
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286 | Serialize(obj, stream, config, false);
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287 | }
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288 |
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289 | public static void Serialize(object obj, Stream stream, Configuration config, bool includeAssemblies) {
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290 | Serialize(obj, stream, config, includeAssemblies, true);
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291 | }
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292 |
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293 | public static void Serialize(object obj, Stream stream, Configuration config, bool includeAssemblies, bool interleaveTypeInfo) {
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294 | try {
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295 | using (StreamWriter writer = new StreamWriter(new GZipStream(stream, CompressionMode.Compress))) {
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296 | Serializer serializer = new Serializer(obj, config);
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297 | serializer.InterleaveTypeInformation = true;
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298 | XmlGenerator generator = new XmlGenerator();
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299 | foreach (ISerializationToken token in serializer) {
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300 | string line = generator.Format(token);
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301 | writer.Write(line);
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302 | }
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303 | writer.Flush();
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304 | }
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305 | } catch (PersistenceException) {
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306 | throw;
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307 | } catch (Exception e) {
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308 | throw new PersistenceException("Unexpected exception during Serialization.", e);
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309 | }
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310 | }
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311 | }
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312 | } |
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