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annotate software/mpdl-services/mpiwg-mpdl-cms/src/de/mpg/mpiwg/berlin/mpdl/cms/transform/HighlightContentHandler.java @ 23:e845310098ba

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author Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
date Tue, 27 Nov 2012 12:35:19 +0100
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Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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1 package de.mpg.mpiwg.berlin.mpdl.cms.transform;
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2
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3 import java.util.ArrayList;
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4
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5 import org.xml.sax.*;
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6
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7 import de.mpg.mpiwg.berlin.mpdl.cms.lucene.IndexHandler;
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8 import de.mpg.mpiwg.berlin.mpdl.exception.ApplicationException;
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9 import de.mpg.mpiwg.berlin.mpdl.util.StringUtils;
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10
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11 public class HighlightContentHandler implements ContentHandler {
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12 private String xmlnsString = "";
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13 private String highlightElemName;
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14 private int highlightElemPos = 1;
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15 private int currentHighlightElemPos = 0;
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16 private boolean highlightElemMode = false;
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17 private int highlightElemModeOpenTags = 0;
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18 private String highlightQueryType = "orig"; // orig, reg, norm or morph
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19 private String highlightQuery; // complex Lucene query
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20 private String highlightQueryForms; // highlight terms separated by a blank
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21 private boolean highlightHitMode = false;
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22 private int highlightHitModeOpenTags = 0;
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23 private boolean firstPageBreakReachedMode = false; // in a page fragment: if a page break element is surrounded by an element (e.g. "s") then this element should not increment the currentHighlightElemPos
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24 private boolean firstPageBreakReached = true;
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25 private StringBuilder result = new StringBuilder();
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26
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27 public HighlightContentHandler() throws ApplicationException {
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28 }
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29
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30 public HighlightContentHandler(String highlightElemName, int highlightElemPos) throws ApplicationException {
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31 this.highlightElemName = highlightElemName;
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32 this.highlightElemPos = highlightElemPos;
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33 }
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34
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35 public HighlightContentHandler(String highlightElemName, int highlightElemPos, String highlightQueryType, String highlightQuery, String language) throws ApplicationException {
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36 this.highlightElemName = highlightElemName;
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37 this.highlightElemPos = highlightElemPos;
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38 this.highlightQueryType = highlightQueryType;
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39 this.highlightQuery = highlightQuery;
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40 if (highlightQuery != null) {
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41 IndexHandler indexHandler = IndexHandler.getInstance();
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42 ArrayList<String> queryTerms = indexHandler.fetchTerms(highlightQuery, language); // all query terms in query (also morphological terms)
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43 highlightQueryForms = toString(queryTerms);
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44 }
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45 }
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46
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47 public void setFirstPageBreakReachedMode(boolean firstPageBreakReachedMode) {
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48 this.firstPageBreakReachedMode = firstPageBreakReachedMode;
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49 if (firstPageBreakReachedMode)
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50 this.firstPageBreakReached = false; // is first set to false and later if a page break is found (by startElement) it is set to true
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51 }
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52
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53 public StringBuilder getResult() {
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54 return result;
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55 }
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56
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57 public void startDocument() throws SAXException {
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58 }
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59
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60 public void endDocument() throws SAXException {
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61 }
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62
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63 public void characters(char[] c, int start, int length) throws SAXException {
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64 char[] cCopy = new char[length];
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65 System.arraycopy(c, start, cCopy, 0, length);
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66 String charactersStr = String.valueOf(cCopy);
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67 if (charactersStr != null && ! charactersStr.equals("")) {
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68 charactersStr = StringUtils.deresolveXmlEntities(charactersStr);
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69 write(charactersStr);
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70 }
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71 }
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72
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73 public void ignorableWhitespace(char[] c, int start, int length) throws SAXException {
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74 }
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75
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76 public void processingInstruction(String target, String data) throws SAXException {
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77 }
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78
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79 public void setDocumentLocator(Locator locator) {
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80 }
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81
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82 public void startPrefixMapping(String prefix, String uri) throws SAXException {
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83 xmlnsString += "xmlns:" + prefix + "=\"" + uri + "\" ";
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84 if (prefix != null && prefix.equals(""))
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85 xmlnsString = "xmlns" + "=\"" + uri + "\" ";
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86 }
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87
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88 public void endPrefixMapping(String prefix) throws SAXException {
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89 }
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90
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91 public void skippedEntity(String name) throws SAXException {
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92 }
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93
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94 public void startElement(String uri, String localName, String name, Attributes attrs) throws SAXException {
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95 int attrSize = attrs.getLength();
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96 String attrString = "";
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97 for (int i=0; i<attrSize; i++) {
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98 String attrQName = attrs.getQName(i);
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99 String attrValue = attrs.getValue(i);
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100 attrValue = StringUtils.forXML(attrValue);
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101 attrString = attrString + " " + attrQName + "=\"" + attrValue + "\"";
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102 }
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103 if (attrString != null && ! attrString.isEmpty()) {
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104 attrString = attrString.trim();
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105 }
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106 if (xmlnsString != null && ! xmlnsString.isEmpty()) {
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107 xmlnsString = xmlnsString.trim();
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108 }
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109 if (localName.equals("pb"))
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110 firstPageBreakReached = true;
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111 // start highlight element at position
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112 if (highlightElemName != null && highlightElemName.equals(localName) && firstPageBreakReached) {
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113 currentHighlightElemPos++;
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114 if (currentHighlightElemPos == highlightElemPos && highlightElemModeOpenTags == 0) {
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115 highlightElemMode = true;
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116 write("<hi type=\"elem\">");
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117 }
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118 }
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119 if (highlightElemMode) {
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120 highlightElemModeOpenTags++;
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121 }
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122 // start highlight query
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123 if (highlightQuery != null && localName.equals("w")) {
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124 boolean matched = false;
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125 String attrQName = "form";
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126 if (highlightQueryType.equals("orig"))
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127 attrQName = "form";
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128 else if (highlightQueryType.equals("reg"))
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129 attrQName = "formRegularized";
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130 else if (highlightQueryType.equals("norm"))
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131 attrQName = "formNormalized";
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132 else if (highlightQueryType.equals("morph"))
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133 attrQName = "lemmas";
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134 String attrValue = getAttrValue(attrs, attrQName);
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135 if (highlightQueryType.equals("reg") && attrValue == null)
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136 attrValue = getAttrValue(attrs, "form"); // if no regularized form exist it takes the form
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137 if (attrValue != null) {
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138 String[] forms = highlightQueryForms.split(" ");
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139 for (int i=0; i<forms.length; i++) {
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140 if (! matched) {
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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141 String form = forms[i];
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142 if (form.endsWith("*")) { // TODO support middle wildcard queries: bla*bla bla?bla
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143 form = form.replace("*", "");
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144 matched = attrValue.startsWith(form);
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145 } else {
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146 matched = attrValue.equals(form);
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147 }
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148 }
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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149 }
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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150 }
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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151 if ((highlightElemName == null && matched && highlightHitModeOpenTags == 0) || (highlightElemName != null && highlightElemMode && matched && highlightHitModeOpenTags == 0)) {
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152 highlightHitMode = true;
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153 write("<hi type=\"hit\">");
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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154 }
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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155 }
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
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156 if (highlightHitMode) {
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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157 highlightHitModeOpenTags++;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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158 }
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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159 write("<" + name);
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
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160 if (xmlnsString != null && ! xmlnsString.isEmpty())
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
161 write(" " + xmlnsString);
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
162 if (attrString != null && ! attrString.isEmpty())
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
163 write(" " + attrString);
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
164 write(">");
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
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165 xmlnsString = "";
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
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166 }
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
167
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
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168 public void endElement(String uri, String localName, String name) throws SAXException {
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parents:
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169 write("</" + name + ">");
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170 // end highlight element at position
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
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171 if (highlightElemMode) {
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
172 if (highlightElemModeOpenTags == 1) {
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
173 highlightElemMode = false;
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parents:
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174 write("</hi>");
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
175 }
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
176 highlightElemModeOpenTags--;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
177 }
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
178 // end highlight query
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
179 if (highlightHitMode) {
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
180 if (highlightHitModeOpenTags == 1) {
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
181 highlightHitMode = false;
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parents:
diff changeset
182 write("</hi>");
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parents:
diff changeset
183 }
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
184 highlightHitModeOpenTags--;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
185 }
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
186 }
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
187
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
188 private String toString(ArrayList<String> queryForms) {
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
189 String queryFormsStr = "";
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
190 for (int i=0; i<queryForms.size(); i++) {
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
191 String form = queryForms.get(i);
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
192 queryFormsStr = queryFormsStr + form + " ";
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
193 }
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
194 if (queryForms == null || queryForms.size() == 0)
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
195 return null;
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parents:
diff changeset
196 else
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
197 return queryFormsStr.substring(0, queryFormsStr.length() -1);
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parents:
diff changeset
198 }
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
199
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
200 private void write(String outStr) throws SAXException {
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
201 result.append(outStr);
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
202 }
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
203
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
204 private String getAttrValue(Attributes attrs, String attrQName) {
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
205 String retValue = null;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
206 int attrSize = attrs.getLength();
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
207 for (int i=0; i<attrSize; i++) {
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
208 String attrQNameTmp = attrs.getQName(i);
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
209 String attrValue = attrs.getValue(i);
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
210 if (attrQNameTmp.equals(attrQName))
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
211 return attrValue;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
212 }
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
213 return retValue;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
214 }
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents:
diff changeset
215 }