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1 package de.mpiwg.itgroup.metadataManager.pid;
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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.MalformedURLException;
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9 import java.net.URL;
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10
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11 import javax.xml.parsers.DocumentBuilder;
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12 import javax.xml.parsers.DocumentBuilderFactory;
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13
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14 import org.apache.log4j.Logger;
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15 import org.apache.xmlrpc.XmlRpcException;
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16 import org.apache.xmlrpc.client.XmlRpcClient;
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17 import org.apache.xmlrpc.client.XmlRpcClientConfigImpl;
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18 import org.jdom.Document;
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19 import org.jdom.Element;
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20 import org.jdom.JDOMException;
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21 import org.jdom.input.SAXBuilder;
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22 import org.jdom.xpath.XPath;
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23
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24 import org.xml.sax.InputSource;
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25
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26
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27
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28 public class DCTransformer {
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29 static public String MPIWG = "http://www.mpiwg-berlin.mpg.de/ns/mpiwg";
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30
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31 public static String converterProvider = "http://127.0.0.1:28080/metadataMain";
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32 private String metaDataLink;
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33 private Logger logger = Logger.getLogger("transformerLogger");
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34
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35 public DCTransformer(String metaDataLink) {
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36
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37 this.metaDataLink=metaDataLink;
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38 }
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39
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40 public Element getDCFromIndexMeta() {
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41 //Verbinde mit metadataprovider
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42 XmlRpcClientConfigImpl config = new XmlRpcClientConfigImpl();
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43
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44
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45 try {
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46 config.setServerURL(new URL(converterProvider));
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47 } catch (MalformedURLException e) {
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48 // TODO Auto-generated catch block
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49 e.printStackTrace();
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50 return null;
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51 }
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52
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53 XmlRpcClient client = new XmlRpcClient();
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54 client.setConfig(config);
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55 Object[] params = new Object[] { metaDataLink };
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56
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57 String result;
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58 try {
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59 result = (String) client.execute("getDCFormatted", params);
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60 } catch (XmlRpcException e) {
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61 // TODO Auto-generated catch block
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62 logger.error("CANNOT connector to:"+converterProvider);
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63 e.printStackTrace();
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64 return null;
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65 }
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66 logger.debug("dC:"+result);
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67
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68 SAXBuilder db = new SAXBuilder();
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69 InputStream resultStream;
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70 try {
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71 resultStream = new ByteArrayInputStream(result.getBytes("utf-8"));
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72 } catch (UnsupportedEncodingException e) {
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73 // TODO Auto-generated catch block
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74 e.printStackTrace();
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75 return null;
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76 }
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77 Document dc;
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78 try {
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79 dc = db.build(resultStream);
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80 } catch (JDOMException e) {
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81 // TODO Auto-generated catch block
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82 e.printStackTrace();
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83 return null;
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84 } catch (IOException e) {
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85 // TODO Auto-generated catch block
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86 e.printStackTrace();
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87 return null;
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88 }
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89
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90 return dc.getRootElement();
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91 }
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92
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93 public Element getContentOfMetaTag() {
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94 SAXBuilder db = new SAXBuilder();
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95
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96 Document dc;
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97 try {
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98 dc = db.build(metaDataLink);
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99 } catch (JDOMException e) {
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100 // TODO Auto-generated catch block
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101 e.printStackTrace();
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102 return null;
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103 } catch (IOException e) {
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104 // TODO Auto-generated catch block
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105 e.printStackTrace();
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106 return null;
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107 }
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108
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109 Element retElement = null;
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110 try {
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111 XPath xp = getXPath("//meta");
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112 retElement = (Element) xp.selectSingleNode(dc);
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113
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114 } catch (JDOMException e) {
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115 //nothing to be done
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116 }
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117 if (retElement==null) { // versuche noch mal mit namespace
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118 try {
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119
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120 XPath xp = getXPath("//mpiwg:meta");
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121 retElement = (Element) xp.selectSingleNode(dc);
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122
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123 } catch (JDOMException e) {
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124 //nothing to be done
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125 }
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126
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127 }
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128 return retElement;
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129 }
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130
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131
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132 private XPath getXPath(String xpath) throws JDOMException{
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133 XPath xpathResources = XPath.newInstance(xpath);
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134
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135 xpathResources.addNamespace("mpiwg",MPIWG);
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136
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137 return xpathResources;
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138 }
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139
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140 public String getImagePathFromIndexMeta() {
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141 SAXBuilder db = new SAXBuilder();
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142
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143 Document dc;
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144 try {
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145 dc = db.build(metaDataLink);
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146 } catch (JDOMException e) {
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147 // TODO Auto-generated catch block
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148 e.printStackTrace();
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149 return null;
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150 } catch (IOException e) {
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151 // TODO Auto-generated catch block
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152 e.printStackTrace();
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153 return null;
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154 }
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155
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156 Element retElement = null;
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157 try {
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158 XPath xp = getXPath("//texttool/image");
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159 retElement = (Element) xp.selectSingleNode(dc);
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160
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161 } catch (JDOMException e) {
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162 //nothing to be done
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163 }
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164 if (retElement==null) { // versuche noch mal mit namespace
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165 try {
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166 XPath xp = getXPath("//mpiwg:texttool/mpiwg:image");
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167 retElement = (Element) xp.selectSingleNode(dc);
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168
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169 } catch (JDOMException e) {
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170 //nothing to be done
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171 }
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172
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173 }
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174 if (retElement==null)
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175 return "";
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176 return retElement.getTextTrim();
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177 }
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178
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179 }
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