1 package com.indexdata.pz2utils4jsf.pazpar2.data;
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3 import java.io.ByteArrayInputStream;
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4 import java.io.IOException;
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5 import java.io.UnsupportedEncodingException;
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6 import java.util.Arrays;
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7 import java.util.List;
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8 import java.util.Stack;
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10 import javax.xml.parsers.ParserConfigurationException;
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11 import javax.xml.parsers.SAXParser;
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12 import javax.xml.parsers.SAXParserFactory;
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14 import org.xml.sax.Attributes;
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15 import org.xml.sax.InputSource;
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16 import org.xml.sax.SAXException;
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17 import org.xml.sax.XMLReader;
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18 import org.xml.sax.helpers.DefaultHandler;
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20 import com.indexdata.pz2utils4jsf.pazpar2.data.ByTarget;
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21 import com.indexdata.pz2utils4jsf.pazpar2.data.Hit;
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22 import com.indexdata.pz2utils4jsf.pazpar2.data.Location;
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23 import com.indexdata.pz2utils4jsf.pazpar2.data.Pazpar2ResponseData;
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24 import com.indexdata.pz2utils4jsf.pazpar2.data.RecordResponse;
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25 import com.indexdata.pz2utils4jsf.pazpar2.data.ShowResponse;
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26 import com.indexdata.pz2utils4jsf.pazpar2.data.StatResponse;
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27 import com.indexdata.pz2utils4jsf.pazpar2.data.Target;
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28 import com.indexdata.pz2utils4jsf.pazpar2.data.TermListResponse;
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29 import com.indexdata.pz2utils4jsf.pazpar2.data.TermListsResponse;
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30 import com.indexdata.pz2utils4jsf.pazpar2.data.TermResponse;
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31 import com.indexdata.pz2utils4jsf.pazpar2.data.TermXTargetResponse;
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33 public class Pazpar2ResponseParser extends DefaultHandler {
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35 private XMLReader xmlReader = null;
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36 private Pazpar2ResponseData currentElement = null;
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37 private Stack<Pazpar2ResponseData> dataElements = new Stack<Pazpar2ResponseData>();
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38 private Pazpar2ResponseData result = null;
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39 private String xml = null;
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41 private static final List<String> docTypes =
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42 Arrays.asList("bytarget","termlist","show","stat","record","search");
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44 public Pazpar2ResponseParser() {
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47 } catch (ParserConfigurationException e) {
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48 // TODO Auto-generated catch block
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49 e.printStackTrace();
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50 } catch (SAXException e) {
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51 // TODO Auto-generated catch block
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52 e.printStackTrace();
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56 public static Pazpar2ResponseParser getParser() {
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57 return new Pazpar2ResponseParser();
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60 private void initSax() throws ParserConfigurationException, SAXException {
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61 SAXParserFactory spf = SAXParserFactory.newInstance();
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62 spf.setNamespaceAware(true);
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63 SAXParser saxParser = spf.newSAXParser();
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64 xmlReader = saxParser.getXMLReader();
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65 xmlReader.setContentHandler(this);
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69 * Parses a Pazpar2 XML response -- or an error response as XML -- and produces a
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70 * Pazpar2ResponseData object, i.e. a 'show' object
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72 * @param response XML response string from Pazpar2
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73 * @return Response data object
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75 public Pazpar2ResponseData getDataObject (String response) {
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76 this.xml = response;
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78 xmlReader.parse(new InputSource(new ByteArrayInputStream(response.getBytes("UTF-8"))));
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79 } catch (UnsupportedEncodingException e) {
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80 // TODO Auto-generated catch block
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81 e.printStackTrace();
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82 } catch (IOException e) {
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83 // TODO Auto-generated catch block
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84 e.printStackTrace();
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85 } catch (SAXException e) {
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86 // TODO Auto-generated catch block
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87 e.printStackTrace();
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93 * Receive notification at the start of element
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97 public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException {
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98 if (localName.equals("show")) {
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99 currentElement = new ShowResponse();
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100 } else if (localName.equals("hit")) {
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101 currentElement = new Hit();
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102 } else if (localName.equals("location")) {
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103 currentElement = new Location();
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104 } else if (localName.equals("bytarget")) {
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105 currentElement = new ByTarget();
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106 } else if (localName.equals("target")) {
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107 currentElement = new Target();
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108 } else if (localName.equals("stat")) {
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109 currentElement = new StatResponse();
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110 } else if (localName.equals("termlist")) {
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111 currentElement = new TermListsResponse();
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112 } else if (localName.equals("list")) {
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113 currentElement = new TermListResponse();
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114 ((TermListResponse)currentElement).setName(atts.getValue("name"));
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115 ((TermListsResponse)dataElements.peek()).addTermList((TermListResponse)currentElement);
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116 } else if (localName.equals("term")) {
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117 if (dataElements.peek().getAttribute("name").equals("xtargets")) {
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118 currentElement = new TermXTargetResponse();
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120 currentElement = new TermResponse();
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122 ((TermListResponse)dataElements.peek()).addTerm((TermResponse)currentElement);
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123 } else if (localName.equals("record")) {
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124 currentElement = new RecordResponse();
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125 } else if (localName.equals("search")) {
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126 currentElement = new SearchResponse();
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127 } else if (localName.equals("applicationerror")) {
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128 currentElement = new CommandError();
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129 } else if (localName.equals("error") && dataElements.peek().getType().equals("applicationerror")) {
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130 currentElement = new Pazpar2Error();
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132 currentElement = new Pazpar2ResponseData();
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134 currentElement.setType(localName);
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135 for (int i=0; i< atts.getLength(); i++) {
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136 currentElement.setAttribute(atts.getLocalName(i), atts.getValue(i));
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138 if (!docTypes.contains(localName)) {
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139 dataElements.peek().addElement(localName, currentElement);
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141 if (this.xml != null) { // Store XML for doc level elements
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142 currentElement.setXml(xml);
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145 dataElements.push(currentElement);
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149 public void characters(char[] ch, int start, int length) throws SAXException {
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150 String data = new String(ch, start, length);
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151 dataElements.peek().appendContent(data);
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155 public void endElement(String namespaceURI, String localName, String qName) throws SAXException {
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156 if (dataElements.size()==1) {
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157 result = dataElements.pop();
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159 dataElements.pop();
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