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annotate software/mpdl-services/mpiwg-mpdl-xml/src/de/mpg/mpiwg/berlin/mpdl/xml/xquery/XQueryEvaluator.java @ 23:e845310098ba

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author Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
date Tue, 27 Nov 2012 12:35:19 +0100
parents dc5e9fcb3fdc
children
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1 package de.mpg.mpiwg.berlin.mpdl.xml.xquery;
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3 import java.io.StringReader;
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4 import java.io.StringWriter;
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5 import java.net.URL;
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6 import java.util.ArrayList;
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8 import javax.xml.transform.stream.StreamSource;
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9
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10 import org.xml.sax.SAXParseException;
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12 import de.mpg.mpiwg.berlin.mpdl.exception.ApplicationException;
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14 import net.sf.saxon.s9api.Axis;
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15 import net.sf.saxon.s9api.DocumentBuilder;
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16 import net.sf.saxon.s9api.Processor;
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17 import net.sf.saxon.s9api.QName;
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18 import net.sf.saxon.s9api.SaxonApiException;
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19 import net.sf.saxon.s9api.Serializer;
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20 import net.sf.saxon.s9api.XQueryCompiler;
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21 import net.sf.saxon.s9api.XQueryExecutable;
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22 import net.sf.saxon.s9api.XdmAtomicValue;
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23 import net.sf.saxon.s9api.XdmEmptySequence;
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24 import net.sf.saxon.s9api.XdmItem;
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25 import net.sf.saxon.s9api.XdmNode;
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26 import net.sf.saxon.s9api.XdmNodeKind;
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27 import net.sf.saxon.s9api.XdmSequenceIterator;
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28 import net.sf.saxon.s9api.XdmValue;
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29 import net.sf.saxon.trans.XPathException;
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31 public class XQueryEvaluator {
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32 private Processor processor;
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33 private XQueryCompiler xQueryCompiler;
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35 public XQueryEvaluator() {
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36 processor = new Processor(false);
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37 xQueryCompiler = processor.newXQueryCompiler();
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38 }
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39
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40 public XdmNode parse(URL srcUrl) throws ApplicationException {
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41 try {
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42 DocumentBuilder docBuilder = processor.newDocumentBuilder();
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43 StreamSource xmlDoc = new StreamSource(srcUrl.toString());
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44 XdmNode docNode = docBuilder.build(xmlDoc);
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45 return docNode;
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46 } catch (SaxonApiException e) {
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47 String message = e.getMessage();
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48 Throwable t = e.getCause();
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49 if (t instanceof XPathException) {
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50 XPathException xpathException = (XPathException) t;
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51 Throwable t2 = xpathException.getException();
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52 if (t2 instanceof SAXParseException) {
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53 SAXParseException saxParseException = (SAXParseException) t2;
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54 int lineNumber = saxParseException.getLineNumber();
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55 int columnNumber = saxParseException.getColumnNumber();
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56 message = "Line: " + lineNumber + ", Column: " + columnNumber + ": " + e.getMessage();
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57 }
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58 }
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59 throw new ApplicationException("Your source file (" + srcUrl.toString() + ") is not valid: " + message);
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60 }
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61 }
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63 public Hits evaluate(URL srcUrl, String xqueryStr, int from, int to) throws ApplicationException {
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64 Hits result = (Hits) evaluate(srcUrl, xqueryStr, from, to, "hits");
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65 return result;
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66 }
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67
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68 public XdmValue evaluate(String srcXmlStr, String xqueryStr) throws ApplicationException {
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69 XdmValue result = (XdmValue) evaluate(srcXmlStr, xqueryStr, 0, 9, "XdmValue");
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70 return result;
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71 }
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73 public XdmValue evaluate(URL srcUrl, String xqueryStr) throws ApplicationException {
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74 XdmValue result = (XdmValue) evaluate(srcUrl, xqueryStr, 0, 9, "XdmValue");
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75 return result;
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76 }
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78 public String evaluateAsString(String srcXmlStr, String xqueryStr) throws ApplicationException {
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79 Object result = evaluate(srcXmlStr, xqueryStr, 0, 9, "string");
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80 if (result == null)
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81 return null;
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82 else
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83 return (String) result;
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84 }
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85
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86 public String evaluateAsString(URL srcUrl, String xqueryStr) throws ApplicationException {
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87 Object result = evaluate(srcUrl, xqueryStr, 0, 9, "string");
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88 if (result == null)
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89 return null;
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90 else
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91 return (String) result;
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92 }
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93
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94 public String evaluateAsStringValueJoined(String srcXmlStr, String xqueryStr) throws ApplicationException {
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95 return evaluateAsStringValueJoined(srcXmlStr, xqueryStr, " ");
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96 }
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97
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98 public String evaluateAsStringValueJoined(URL srcUrl, String xqueryStr) throws ApplicationException {
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99 return evaluateAsStringValueJoined(srcUrl, xqueryStr, " ");
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100 }
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101
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102 public String evaluateAsStringValueJoined(String srcXmlStr, String xqueryStr, String separator) throws ApplicationException {
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103 XdmValue val = (XdmValue) evaluate(srcXmlStr, xqueryStr, 0, 9, "XdmValue");
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104 return stringJoin(val, separator);
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105 }
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106
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107 public String evaluateAsStringValueJoined(URL srcUrl, String xqueryStr, String separator) throws ApplicationException {
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108 XdmValue val = (XdmValue) evaluate(srcUrl, xqueryStr, 0, 9, "XdmValue");
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109 return stringJoin(val, separator);
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110 }
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111
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112 public Object evaluate(String srcXmlStr, String xqueryStr, int from, int to, String resultType) throws ApplicationException {
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113 try {
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114 StringReader srcXmlStrReader = new StringReader(srcXmlStr);
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115 StreamSource xmlDoc = new StreamSource(srcXmlStrReader);
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116 XQueryExecutable xQueryExecutable = xQueryCompiler.compile(xqueryStr);
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117 Serializer serializer = new Serializer();
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118 serializer.setOutputWriter(new StringWriter());
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119 net.sf.saxon.s9api.XQueryEvaluator xQueryEvaluator = xQueryExecutable.load();
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120 xQueryEvaluator.setSource(xmlDoc);
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121 XdmValue val = xQueryEvaluator.evaluate();
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122 Object result = val;
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123 if (resultType != null && resultType.equals("string")) {
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124 result = toString(val);
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125 } else if (resultType != null && resultType.equals("XdmValue")) {
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126 result = val;
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127 } else if (resultType != null && resultType.equals("hits")) {
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128 result = toHits(val, from, to);
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129 }
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130 return result;
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131 } catch (SaxonApiException e) {
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132 throw new ApplicationException(e);
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133 }
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134 }
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135
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diff changeset
136 public Object evaluate(URL srcUrl, String xqueryStr, int from, int to, String resultType) throws ApplicationException {
18
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137 try {
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138 StreamSource xmlDoc = new StreamSource(srcUrl.toString());
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139 XQueryExecutable xQueryExecutable = xQueryCompiler.compile(xqueryStr);
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140 Serializer serializer = new Serializer();
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141 serializer.setOutputWriter(new StringWriter());
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142 net.sf.saxon.s9api.XQueryEvaluator xQueryEvaluator = xQueryExecutable.load();
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143 xQueryEvaluator.setSource(xmlDoc);
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diff changeset
144 XdmValue val = xQueryEvaluator.evaluate();
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145 Object result = null;
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diff changeset
146 if (resultType != null && resultType.equals("string")) {
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diff changeset
147 result = toString(val);
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diff changeset
148 } else if (resultType != null && resultType.equals("XdmValue")) {
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diff changeset
149 result = val;
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parents: 18
diff changeset
150 } else if (resultType != null && resultType.equals("hits")) {
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diff changeset
151 result = toHits(val, from, to);
18
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152 }
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153 return result;
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154 } catch (SaxonApiException e) {
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155 throw new ApplicationException(e);
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parents:
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156 }
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157 }
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158
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diff changeset
159 private Hits toHits(XdmValue xdmValue, int from, int to) throws ApplicationException {
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diff changeset
160 Hits result = null;
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diff changeset
161 if (xdmValue instanceof XdmAtomicValue) {
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diff changeset
162 XdmAtomicValue av = (XdmAtomicValue) xdmValue;
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diff changeset
163 String avStr = av.getStringValue();
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diff changeset
164 ArrayList<Hit> hits = new ArrayList<Hit>();
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diff changeset
165 Hit hit = new Hit(avStr);
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diff changeset
166 hit.setType(Hit.TYPE_ATOMIC_VALUE);
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diff changeset
167 hits.add(hit);
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diff changeset
168 result = new Hits(hits, from, to);
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diff changeset
169 result.setSize(1);
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diff changeset
170 return result;
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parents: 18
diff changeset
171 }
18
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172 XdmSequenceIterator iter = xdmValue.iterator();
23
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diff changeset
173 int size = xdmValue.size();
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diff changeset
174 if (size > 0) {
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diff changeset
175 int counter = 0;
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diff changeset
176 ArrayList<Hit> hits = new ArrayList<Hit>();
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diff changeset
177 while (iter.hasNext() && counter <= to) {
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diff changeset
178 XdmItem item = iter.next();
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parents: 18
diff changeset
179 if (counter >= from) {
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diff changeset
180 XdmNode n = (XdmNode) item;
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parents: 18
diff changeset
181 ArrayList<XdmNode> precNodes = getPreceding(n, "pb");
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parents: 18
diff changeset
182 int page = precNodes.size();
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parents: 18
diff changeset
183 String nodeName = n.getNodeName().getLocalName();
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parents: 18
diff changeset
184 String nodeKindName = n.getNodeKind().name();
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diff changeset
185 ArrayList<XdmNode> precNodesUntilPB = getPrecedingUntil(n, nodeName, "pb");
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parents: 18
diff changeset
186 int hitPagePosition = precNodesUntilPB.size() + 1;
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parents: 18
diff changeset
187 String itemStr = item.toString();
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diff changeset
188 // itemStr = itemStr.replaceAll("[ \n\t]+xmlns.*?\".*?\"", ""); // remove the namespace
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diff changeset
189 itemStr = itemStr.replaceAll("[ \n\t]+xmlns", " xmlns"); // remove the blanks before the namespace
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parents: 18
diff changeset
190 Hit hit = new Hit(itemStr);
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diff changeset
191 hit.setPage(page);
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parents: 18
diff changeset
192 hit.setName(nodeName);
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diff changeset
193 if (nodeKindName != null && nodeKindName.equals("ELEMENT"))
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diff changeset
194 hit.setType(Hit.TYPE_ELEMENT);
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parents: 18
diff changeset
195 else if (nodeKindName != null && nodeKindName.equals("ATTRIBUTE"))
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diff changeset
196 hit.setType(Hit.TYPE_ATTRIBUTE);
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parents: 18
diff changeset
197 if (hit.getType() == Hit.TYPE_ELEMENT)
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diff changeset
198 hit.setHitPagePosition(hitPagePosition);
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diff changeset
199 hits.add(hit);
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diff changeset
200 }
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diff changeset
201 counter++;
e845310098ba diverse Korrekturen
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parents: 18
diff changeset
202 }
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parents: 18
diff changeset
203 result = new Hits(hits, from, to);
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parents: 18
diff changeset
204 result.setSize(size);
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parents: 18
diff changeset
205 }
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parents: 18
diff changeset
206 return result;
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parents: 18
diff changeset
207 }
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parents: 18
diff changeset
208
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diff changeset
209 private String toString(XdmValue xdmValue) {
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diff changeset
210 if (xdmValue instanceof XdmAtomicValue) {
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parents: 18
diff changeset
211 XdmAtomicValue av = (XdmAtomicValue) xdmValue;
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parents: 18
diff changeset
212 String avStr = av.getStringValue();
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diff changeset
213 return avStr;
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diff changeset
214 }
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diff changeset
215 String result = null;
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diff changeset
216 XdmSequenceIterator iter = xdmValue.iterator();
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diff changeset
217 int size = xdmValue.size();
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parents: 18
diff changeset
218 if (size > 0) {
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parents: 18
diff changeset
219 result = "";
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parents: 18
diff changeset
220 while (iter.hasNext()) {
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diff changeset
221 XdmItem item = iter.next();
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parents: 18
diff changeset
222 String itemStr = item.toString();
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parents: 18
diff changeset
223 result += itemStr;
e845310098ba diverse Korrekturen
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parents: 18
diff changeset
224 }
18
dc5e9fcb3fdc Erstellung
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parents:
diff changeset
225 }
dc5e9fcb3fdc Erstellung
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parents:
diff changeset
226 return result;
dc5e9fcb3fdc Erstellung
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parents:
diff changeset
227 }
dc5e9fcb3fdc Erstellung
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parents:
diff changeset
228
23
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parents: 18
diff changeset
229 private String stringJoin(XdmValue xdmValue, String separator) {
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parents: 18
diff changeset
230 if (xdmValue == null || xdmValue instanceof XdmEmptySequence)
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parents: 18
diff changeset
231 return null;
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parents: 18
diff changeset
232 if (xdmValue instanceof XdmAtomicValue) {
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parents: 18
diff changeset
233 XdmAtomicValue av = (XdmAtomicValue) xdmValue;
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parents: 18
diff changeset
234 String avStr = av.getStringValue();
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parents: 18
diff changeset
235 return avStr;
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parents: 18
diff changeset
236 }
e845310098ba diverse Korrekturen
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parents: 18
diff changeset
237 String result = "";
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parents: 18
diff changeset
238 XdmSequenceIterator iter = null;
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parents: 18
diff changeset
239 if (xdmValue instanceof XdmNode) {
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parents: 18
diff changeset
240 XdmNode xdmNode = (XdmNode) xdmValue;
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parents: 18
diff changeset
241 iter = xdmNode.axisIterator(Axis.CHILD);
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parents: 18
diff changeset
242 } else if (xdmValue instanceof XdmValue) {
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parents: 18
diff changeset
243 iter = xdmValue.iterator();
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parents: 18
diff changeset
244 }
e845310098ba diverse Korrekturen
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parents: 18
diff changeset
245 while (iter.hasNext()) {
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parents: 18
diff changeset
246 XdmNode node = (XdmNode) iter.next();
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parents: 18
diff changeset
247 XdmNodeKind nodeKind = node.getNodeKind();
e845310098ba diverse Korrekturen
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parents: 18
diff changeset
248 if (nodeKind == XdmNodeKind.TEXT) {
e845310098ba diverse Korrekturen
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parents: 18
diff changeset
249 String nodeStr = node.getStringValue();
e845310098ba diverse Korrekturen
Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents: 18
diff changeset
250 String trimmedNodeStr = nodeStr.trim();
e845310098ba diverse Korrekturen
Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents: 18
diff changeset
251 result = result + trimmedNodeStr;
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parents: 18
diff changeset
252 } else if (nodeKind == XdmNodeKind.ELEMENT) {
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parents: 18
diff changeset
253 result = result + stringJoin(node, separator) + separator; // put a separator between child element nodes
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parents: 18
diff changeset
254 }
e845310098ba diverse Korrekturen
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parents: 18
diff changeset
255 }
e845310098ba diverse Korrekturen
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parents: 18
diff changeset
256 return result;
e845310098ba diverse Korrekturen
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parents: 18
diff changeset
257 }
e845310098ba diverse Korrekturen
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parents: 18
diff changeset
258
e845310098ba diverse Korrekturen
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parents: 18
diff changeset
259 private ArrayList<XdmNode> getPreceding(XdmNode startNode, String ofNodeName) {
e845310098ba diverse Korrekturen
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parents: 18
diff changeset
260 ArrayList<XdmNode> retNodes = null;
e845310098ba diverse Korrekturen
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parents: 18
diff changeset
261 XdmSequenceIterator iter = startNode.axisIterator(Axis.PRECEDING);
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parents: 18
diff changeset
262 if (iter != null) {
e845310098ba diverse Korrekturen
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parents: 18
diff changeset
263 retNodes = new ArrayList<XdmNode>();
e845310098ba diverse Korrekturen
Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents: 18
diff changeset
264 while (iter.hasNext()) {
e845310098ba diverse Korrekturen
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parents: 18
diff changeset
265 XdmNode n = (XdmNode) iter.next();
e845310098ba diverse Korrekturen
Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
parents: 18
diff changeset
266 QName qName = n.getNodeName();
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267 if (qName != null) {
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268 String name = qName.getLocalName();
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269 if (name != null && name.equals(ofNodeName))
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270 retNodes.add(n);
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271 }
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272 }
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273 }
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274 return retNodes;
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275 }
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276
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277 private ArrayList<XdmNode> getPrecedingUntil(XdmNode startNode, String ofNodeName, String untilNodeName) {
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278 ArrayList<XdmNode> retNodes = null;
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279 XdmSequenceIterator iter = startNode.axisIterator(Axis.PRECEDING);
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280 if (iter != null) {
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281 retNodes = new ArrayList<XdmNode>();
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282 while (iter.hasNext()) {
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283 XdmNode n = (XdmNode) iter.next();
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284 QName qName = n.getNodeName();
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285 if (qName != null) {
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286 String name = qName.getLocalName();
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287 if (name != null && name.equals(ofNodeName))
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288 retNodes.add(n);
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289 if (name != null && name.equals(untilNodeName))
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290 return retNodes;
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291 }
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292 }
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293 }
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294 return retNodes;
18
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295 }
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296 }