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1 package de.mpiwg.itgroup.metadataManager.client;
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2
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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.InputStream;
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6 import java.io.StringReader;
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7 import java.io.UnsupportedEncodingException;
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8 import java.net.URI;
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9 import java.net.URISyntaxException;
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10
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11 import javax.xml.parsers.SAXParser;
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12
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13 import org.apache.http.HttpEntity;
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14 import org.apache.http.HttpResponse;
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15 import org.apache.http.client.ClientProtocolException;
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16 import org.apache.http.client.HttpClient;
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17 import org.apache.http.client.methods.HttpGet;
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18 import org.apache.http.client.utils.URIUtils;
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19 import org.apache.http.impl.client.DefaultHttpClient;
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20 import org.jdom.Document;
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21 import org.jdom.Element;
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22 import org.jdom.JDOMException;
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23 import org.jdom.input.SAXBuilder;
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24 import org.jdom.output.XMLOutputter;
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25 import org.jdom.xpath.XPath;
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26 import org.json.JSONObject;
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27 import org.json.JSONTokener;
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28
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29 import org.restlet.data.MediaType;
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30 import org.restlet.representation.Representation;
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31 import org.restlet.resource.ClientResource;
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32
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33 public class MetadataClient {
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34
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35 private String serverUrl;
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36
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37 public MetadataClient(String string) {
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38 serverUrl = string;
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39
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40 }
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41
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42 public String replaceBIB(String idOfObject, String newBibTag, boolean save) throws URISyntaxException, ClientProtocolException, IOException {
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43
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44 String newIM=null;
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45 SAXBuilder sb = new SAXBuilder();
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46
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47 String url = serverUrl+"indexMeta/permanent/library/"+idOfObject;
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48
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49 HttpClient httpclient = new DefaultHttpClient();
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50
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51 HttpGet httpget = new HttpGet(new URI(url));
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52
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53 HttpResponse response = httpclient.execute(httpget);
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54 HttpEntity entity = response.getEntity();
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55
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56 try {
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57 if (entity != null) {
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58 InputStream instream = (InputStream) entity.getContent();
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59 Document dom = sb.build(instream);
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60
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61 XPath xp =XPath.newInstance("//bib");
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62 Element bibNode = (Element)xp.selectSingleNode(dom);
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63
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64 Document doc2 = sb.build(new StringReader(newBibTag));
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65 Element newBibRoot=doc2.getRootElement();
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66
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67 Element bibPar=(Element) bibNode.getParent();
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68 bibPar.removeContent(bibNode);
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69 bibPar.addContent((Element) newBibRoot.clone());
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70
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71 XMLOutputter op = new XMLOutputter();
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72 newIM = op.outputString(dom);
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73 if (save){
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74 //TODO save the new XML
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75 }
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76 }
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77 } catch (IllegalStateException e) {
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78 // TODO Auto-generated catch block
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79 e.printStackTrace();
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80 } catch (JDOMException e) {
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81
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82 System.err.println("Can't handle:"+ idOfObject);
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83 e.printStackTrace();
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84
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85 }
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86 return newIM;
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87 }
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88
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89 public String addContext(String indexMeta, String link, String name, Boolean save) throws IOException {
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90 SAXBuilder sb = new SAXBuilder();
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91 InputStream im = new ByteArrayInputStream(indexMeta.getBytes("utf-8"));
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92 try {
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93 Document dom =sb.build(im);
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94
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95 XPath xp = XPath.newInstance("//meta");
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96 Element metaNode=(Element) xp.selectSingleNode(dom);
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97
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98 Element contextElement = new Element("context");
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99
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100 Element linkElement = new Element("link");
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101 linkElement.setText(link);
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102 Element nameElement = new Element("name");
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103 nameElement.setText(name);
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104 contextElement.addContent(linkElement);
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105 contextElement.addContent(nameElement);
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106
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107 metaNode.addContent(contextElement);
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108
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109 XMLOutputter op = new XMLOutputter();
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110 String newIM = op.outputString(dom);
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111
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112 if (save){
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113 //TODO save the new XML
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114 }
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115 return newIM;
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116 } catch (JDOMException e) {
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117 // TODO Auto-generated catch block
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118 e.printStackTrace();
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119 return null;
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120 }
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121 }
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122
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123 }
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