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annotate src/main/java/org/mpi/openmind/repository/utils/OM4StreamWriter.java @ 82:90f9a1c45b15

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small change to xml format.
author Robert Casties <casties@mpiwg-berlin.mpg.de>
date Mon, 10 Jul 2017 17:15:34 +0200
parents b0aebac0780a
children d4b456623d43
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1 package org.mpi.openmind.repository.utils;
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2
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3 import java.io.FileOutputStream;
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4 import java.io.IOException;
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5 import java.io.OutputStreamWriter;
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6 import java.text.DecimalFormat;
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7 import java.util.ArrayList;
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8 import java.util.HashMap;
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9 import java.util.List;
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10 import java.util.Map;
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11
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12 import javax.xml.stream.XMLOutputFactory;
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13 import javax.xml.stream.XMLStreamException;
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14 import javax.xml.stream.XMLStreamWriter;
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15
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16 import org.apache.commons.lang.StringUtils;
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17 import org.apache.log4j.Logger;
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18 import org.mpi.openmind.repository.bo.Attribute;
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19 import org.mpi.openmind.repository.bo.Entity;
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20 import org.mpi.openmind.repository.bo.Node;
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21 import org.mpi.openmind.repository.bo.Relation;
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22 import org.mpi.openmind.repository.services.PersistenceService;
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23
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24 /**
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25 * Export all entities and relations and definitions to XML.
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26 *
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27 * Saves (content) entities and relations (i.e. assertions) and definitions
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28 * (i.e. definition entities and relations) in separate files.
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29 *
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30 * @author jurzua, casties
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31 *
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32 */
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33 public class OM4StreamWriter {
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34
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35 private static Logger logger = Logger.getLogger(OM4StreamWriter.class);
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36
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37 private static final int itemsPerPage = 500;
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38
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39 /** Include normalized own-values. */
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40 public static boolean includeNormalizations = true;
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41
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42 /** key for entity count in attribute counts map */
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43 private static final String ENT_KEY = "<entity-count>";
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44
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45 /**
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46 * Return the object's string representation or "null" if its null.
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47 *
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48 * @param s
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49 * @return
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50 */
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51 private static String defaultString(Object s) {
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52 if (s == null) {
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53 return "null";
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54 } else {
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55 return s.toString();
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56 }
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57 }
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59
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60 /**
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61 * Saves all content Entities with their Attributes and Relations in a XML file with the given fileName.
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62 *
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63 * @param fileName
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64 * @param ps
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65 */
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66 public static void backupEntities(String fileName, PersistenceService ps) {
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67 writeEntsAndRels(fileName, ps, Node.TYPE_ABOX, includeNormalizations);
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68 }
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69
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70 /**
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71 * Saves all definitions in a XML file with the given fileName.
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72 *
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73 * @param fileName
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74 * @param ps
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75 */
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76 public static void backupDefinitions(String fileName, PersistenceService ps) {
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77 writeEntsAndRels(fileName, ps, Node.TYPE_TBOX, false);
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78 }
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80 /**
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81 * Writes all entities of the given type and their relations to the XML file at fileName.
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82 *
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83 * Type is either TYPE_TBOX or TYPE_ABOX.
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84 *
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85 * @param fileName
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86 * @param ps
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87 * @param type
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88 */
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89 private static void writeEntsAndRels(String fileName, PersistenceService ps, String type, boolean includeNorm) {
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90 OutputStreamWriter out;
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91 try {
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92 // statistics collection Maps
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93 Map<String, Map<String, Long>> entStats = new HashMap<String, Map<String, Long>>();
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94 Map<String, Map<String, Long>> relStats = new HashMap<String, Map<String, Long>>();
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96 // setup xml writer
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97 FileOutputStream fileOut = new FileOutputStream(fileName);
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98 out = new OutputStreamWriter(fileOut, "UTF-8");
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99 XMLOutputFactory factory = XMLOutputFactory.newInstance();
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100 XMLStreamWriter writer = factory.createXMLStreamWriter(out);
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101
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102 int entitiesCount = 0;
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103
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104 writer.writeStartDocument("UTF-8", "1.0");
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105
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106 if (type.equals(Node.TYPE_ABOX)) {
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107 writer.writeStartElement(XMLUtil.OPENMIND_DATA);
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108 writer.writeAttribute("version", "4.6");
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109 // get number of content Entities
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110 entitiesCount = ps.getEntityCount(null).intValue();
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111 } else {
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112 writer.writeStartElement(XMLUtil.META_DATA);
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113 writer.writeAttribute("version", "4.6");
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114 // get number of definition Entities
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115 entitiesCount = ps.getEntityCount(Node.TYPE_TBOX).intValue();
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116 }
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117
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118 int numberOfPages = entitiesCount / itemsPerPage;
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119 // debug: int numberOfPages = 1;
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120 int counter = 0;
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121 long start = System.currentTimeMillis();
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122 DecimalFormat df = new DecimalFormat("#.##");
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123
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124 // list of Relations (filled from Entities)
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125 List<Relation> relList = new ArrayList<Relation>();
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126
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127 /*
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128 * write entities
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129 */
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130 writer.writeStartElement((type.equals(Node.TYPE_TBOX)) ? XMLUtil.DEFINITIONS : XMLUtil.ENTITIES);
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131 writer.writeAttribute("count", Integer.toString(entitiesCount));
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132 // iterate database by pages
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133 for (int currentPage = 0; currentPage <= numberOfPages; currentPage++) {
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134 int startRecord = currentPage * itemsPerPage;
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135 List<Entity> entities;
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136
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137 if (type.equals(Node.TYPE_ABOX)) {
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138 // get page of content Entities
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139 entities = ps.getEntityPage(null, startRecord, itemsPerPage);
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140 } else {
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141 // get page of definition Entities
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142 entities = ps.getEntityPage(Node.TYPE_TBOX, startRecord, itemsPerPage);
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143 }
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144
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145 // iterate entities
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146 for (Entity ent : entities) {
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147 // write entity to XML
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148 writeEntity(ent, writer, ps, includeNorm, entStats);
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149 // add (source)relations to list
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150 relList.addAll(ent.getSourceRelations());
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151
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152 counter++;
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153 }
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154
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155 long runtime = System.currentTimeMillis() - start;
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156 double percent = ((double) counter / (double) entitiesCount) * 100.0;
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157 logger.debug("(" + df.format(percent) + "%) \t[" + counter + "/" + entitiesCount + "]\t");
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158 logger.debug("Speed[ents/s]: " + df.format((double) counter / ((double) runtime / 1000)));
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159 writer.flush();
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160 }
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161 writer.writeEndElement();
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162
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163 /*
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164 * write relations (from list)
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165 */
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166 writer.writeStartElement(XMLUtil.RELATIONS);
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167 writer.writeAttribute("count", Integer.toString(relList.size()));
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168 for (Relation rel : relList) {
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169 writeRelation(rel, writer, includeNorm, relStats);
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170 }
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171 writer.writeEndElement();
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172
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173 /*
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174 * write statistics
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175 */
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176 // entity stats
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177 writeStats(XMLUtil.ENTITY_STATS, XMLUtil.ENTITY, entStats, writer);
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178 // relation stats
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179 writeStats(XMLUtil.RELATION_STATS, XMLUtil.RELATION, relStats, writer);
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180
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181 // end file.
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182 writer.writeEndElement();
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183
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184 writer.flush();
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185 writer.close();
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186
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187 logger.info("END Stream Writer");
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188 } catch (IOException e) {
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189 logger.error(e);
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190 } catch (XMLStreamException e) {
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191 logger.error(e);
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192 }
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193 }
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194
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195 /**
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196 * Write OpenMind relation to XML.
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197 *
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198 * @param rel
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199 * @param writer
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200 * @param relStats
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201 * @throws XMLStreamException
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202 */
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203 private static void writeRelation(Relation rel, XMLStreamWriter writer, boolean includeNorm,
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204 Map<String, Map<String, Long>> relStats) throws XMLStreamException {
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205 writer.writeStartElement(XMLUtil.RELATION);
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206
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207 // update stats
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208 Map<String, Long> attStats = updateNodeStats(rel, relStats);
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209
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210 /*
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211 * write XML-attributes
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212 */
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213 writer.writeAttribute(XMLUtil.OBJECT_CLASS, defaultString(rel.getObjectClass()));
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214 writer.writeAttribute(XMLUtil.ID, defaultString(rel.getId()));
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215 writer.writeAttribute(XMLUtil.ROW_ID, defaultString(rel.getRowId()));
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216 if (StringUtils.isNotEmpty(rel.getContentType())) {
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217 writer.writeAttribute(XMLUtil.CONTENT_TYPE, rel.getContentType());
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218 }
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219 writer.writeAttribute(XMLUtil.RELATION_SOURCE_ID, defaultString(rel.getSourceId()));
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220 writer.writeAttribute(XMLUtil.RELATION_TARGET_ID, defaultString(rel.getTargetId()));
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221 writer.writeAttribute(XMLUtil.VERSION, defaultString(rel.getVersion()));
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222 writer.writeAttribute(XMLUtil.MODIFICATION_TIME, defaultString(rel.getModificationTime()));
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223 if (rel.getUser() != null) {
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224 writer.writeAttribute(XMLUtil.USER, rel.getUser());
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225 }
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226 if (rel.getIsPublic()) {
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227 writer.writeAttribute(XMLUtil.PUBLIC, "true");
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228 }
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229
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230 /*
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231 * write OpenMind attributes of this relation as XML tags
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232 */
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233 if (rel.getAttributes().size() > 0) {
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234 writer.writeStartElement(XMLUtil.ATTRIBUTES);
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235 for (Attribute att : rel.getAttributes()) {
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236 // update stats
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237 updateAttStats(att, attStats);
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238 // write xml
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239 writeAttribute(att, writer, includeNorm);
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240 }
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241 writer.writeEndElement();
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242 }
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243
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244 /*
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245 * write own value as content
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246 */
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247 if (StringUtils.isNotEmpty(rel.getOwnValue())) {
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248 writer.writeCharacters(rel.getOwnValue());
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249 }
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250
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251 writer.writeEndElement();
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252 }
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253
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254 /**
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255 * Write OpenMind entity to XML.
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256 *
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257 * @param entity
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258 * @param writer
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259 * @param ps
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260 * @param entStats
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261 * @throws XMLStreamException
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262 */
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263 private static void writeEntity(Entity entity, XMLStreamWriter writer, PersistenceService ps, boolean includeNorm,
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264 Map<String, Map<String, Long>> entStats)
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265 throws XMLStreamException {
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266
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267 writer.writeStartElement((entity.getType().equals(Node.TYPE_TBOX)) ? XMLUtil.DEFINITION : XMLUtil.ENTITY);
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268
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269 if (entity.isLightweight()) {
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270 entity = ps.getEntityContent(entity);
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271 }
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272
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273 // update stats
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274 Map<String, Long> attStats = updateNodeStats(entity, entStats);
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275
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276 /*
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277 * write XML attributes
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278 */
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279 writer.writeAttribute(XMLUtil.OBJECT_CLASS, defaultString(entity.getObjectClass()));
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280 writer.writeAttribute(XMLUtil.ID, defaultString(entity.getId()));
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281 writer.writeAttribute(XMLUtil.ROW_ID, defaultString(entity.getRowId()));
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282 if (StringUtils.isNotEmpty(entity.getContentType())) {
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283 writer.writeAttribute(XMLUtil.CONTENT_TYPE, entity.getContentType());
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284 }
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285 writer.writeAttribute(XMLUtil.VERSION, defaultString(entity.getVersion()));
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286 writer.writeAttribute(XMLUtil.MODIFICATION_TIME, defaultString(entity.getModificationTime()));
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287 if (entity.getUser() != null) {
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288 writer.writeAttribute(XMLUtil.USER, entity.getUser());
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289 }
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290 if (entity.getIsPublic()) {
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291 writer.writeAttribute(XMLUtil.PUBLIC, "true");
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292 }
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293
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294 /*
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295 * write OpenMind attributes of this entity as XML tags
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296 */
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297 if (entity.getAttributes().size() > 0) {
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298 writer.writeStartElement(XMLUtil.ATTRIBUTES);
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299 for (Attribute att : entity.getAttributes()) {
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300 // update stats
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301 updateAttStats(att, attStats);
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302 // write xml
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303 writeAttribute(att, writer, includeNorm);
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304 }
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305 writer.writeEndElement();
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306 }
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307
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308 /*
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309 * write own value
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310 */
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311 String ov = entity.getOwnValue();
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312 if (StringUtils.isNotEmpty(ov)) {
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313 writer.writeCharacters(ov);
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314 String nov = entity.getNormalizedOwnValue();
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315 if (includeNorm && StringUtils.isNotEmpty(nov) && !ov.equals(nov)) {
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316 // write normalized value
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317 writer.writeStartElement(XMLUtil.NORMALIZED);
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318 writer.writeCharacters(nov);
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319 writer.writeEndElement();
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320 }
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321 }
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322
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323 writer.writeEndElement();
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324 }
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325
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326
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327 private static void writeAttribute(Attribute att, XMLStreamWriter writer, boolean includeNorm) throws XMLStreamException {
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328 writer.writeStartElement(XMLUtil.ATTRIBUTE);
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329
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330 /*
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331 * write XML attributes
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332 */
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333 writer.writeAttribute(XMLUtil.ATTRIBUTE_NAME, defaultString(att.getName()));
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334 writer.writeAttribute(XMLUtil.ID, defaultString(att.getId()));
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335 writer.writeAttribute(XMLUtil.ROW_ID, defaultString(att.getRowId()));
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336 writer.writeAttribute(XMLUtil.CONTENT_TYPE, defaultString(att.getContentType()));
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337 writer.writeAttribute(XMLUtil.VERSION, defaultString(att.getVersion()));
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338 writer.writeAttribute(XMLUtil.MODIFICATION_TIME, defaultString(att.getModificationTime()));
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339 if (att.getUser() != null) {
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340 writer.writeAttribute(XMLUtil.USER, att.getUser());
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341 }
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342 if (att.getIsPublic()) {
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343 writer.writeAttribute(XMLUtil.PUBLIC, "true");
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344 }
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345
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346 /*
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347 * write value as content
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348 */
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349 String ov = att.getValue();
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350 if (StringUtils.isNotEmpty(ov)) {
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351 writer.writeCharacters(ov);
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352 String nov = att.getNormalizedOwnValue();
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353 if (includeNorm && StringUtils.isNotEmpty(nov) && !ov.equals(nov)) {
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354 // write normalized value
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355 writer.writeStartElement(XMLUtil.NORMALIZED);
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356 writer.writeCharacters(nov);
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357 writer.writeEndElement();
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358 }
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359 }
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360
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361 writer.writeEndElement();
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362 }
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363
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364
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365 private static void writeStats(String statsTag, String entryTag, Map<String, Map<String, Long>> nodeStats, XMLStreamWriter writer)
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366 throws XMLStreamException {
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367 // write stats tag
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368 writer.writeStartElement(statsTag);
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369
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370 for (String nodeType : nodeStats.keySet()) {
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371 Map<String, Long> attStats = nodeStats.get(nodeType);
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372 Long nodeCnt = attStats.get(ENT_KEY);
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373 // write tag for entity/attribute
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374 writer.writeStartElement(entryTag);
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375 writer.writeAttribute(XMLUtil.OBJECT_CLASS, (nodeType == null)?"null":nodeType);
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376 writer.writeAttribute(XMLUtil.COUNT, nodeCnt.toString());
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377
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378 // write attributes
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379 for (String attName : attStats.keySet()) {
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380 // skip ENT_KEY
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381 if (attName.equals(ENT_KEY)) continue;
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382 // write attribute tag
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383 writer.writeStartElement(XMLUtil.ATTRIBUTE);
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384 writer.writeAttribute(XMLUtil.ATTRIBUTE_NAME, attName);
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385 Long attCnt = attStats.get(attName);
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386 writer.writeAttribute(XMLUtil.COUNT, attCnt.toString());
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387 writer.writeEndElement();
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388 }
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389 // end of entity/attribute tag
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390 writer.writeEndElement();
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391 }
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392 // end of stats tag
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393 writer.writeEndElement();
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394 }
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395
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396
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397 /**
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398 * @param objectClass
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399 * @param entStats
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400 * @return
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401 */
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402 protected static Map<String, Long> updateNodeStats(Node ent, Map<String, Map<String, Long>> entStats) {
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403 String objectClass = ent.getObjectClass();
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404 Map<String, Long> attStats = entStats.get(objectClass);
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405 if (attStats == null) {
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406 // create new attribute stats entry
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407 attStats = new HashMap<String, Long>();
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408 // add key to count entities
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409 attStats.put(ENT_KEY, 1l);
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410 // add to map
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411 entStats.put(objectClass, attStats);
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412 } else {
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413 // increment entity count
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414 Long entCnt = attStats.get(ENT_KEY);
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415 attStats.put(ENT_KEY, entCnt + 1);
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416 }
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417 return attStats;
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418 }
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419
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420 /**
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421 * @param att
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422 * @param attStats
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423 */
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424 protected static void updateAttStats(Attribute att, Map<String, Long> attStats) {
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425 String attName = att.getName();
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426 Long cnt = attStats.get(attName);
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427 if (cnt == null) {
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428 attStats.put(attName, 1l);
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429 } else {
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430 attStats.put(attName, cnt + 1);
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431 }
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432 }
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433
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434
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435
1
jurzua
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436 }