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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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2
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31 //public static String converterProvider = "http://echoneu.mpiwg-berlin.mpg.de/metadata";
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32 public static String converterProvider = "http://dw.mpiwg-berlin.mpg.de:8080/echo_nav/echo_pages/metadata";
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0
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33 private String metaDataLink;
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34 private Logger logger = Logger.getLogger("transformerLogger");
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35
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36 public DCTransformer(String metaDataLink) {
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37
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38 this.metaDataLink=metaDataLink;
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39 }
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40
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41 public Element getDCFromIndexMeta() {
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42 //Verbinde mit metadataprovider
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43 XmlRpcClientConfigImpl config = new XmlRpcClientConfigImpl();
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44
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45
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46 try {
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47 config.setServerURL(new URL(converterProvider));
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48 } catch (MalformedURLException e) {
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49 // TODO Auto-generated catch block
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50 e.printStackTrace();
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51 return null;
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52 }
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53
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54 XmlRpcClient client = new XmlRpcClient();
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55 client.setConfig(config);
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56 Object[] params = new Object[] { metaDataLink };
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57
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58 String result;
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59 try {
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2
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60 Object res = client.execute("getDCDataFromPath", params);
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61 result = (String) res;
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62
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0
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63 } catch (XmlRpcException e) {
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64 // TODO Auto-generated catch block
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65 logger.error("CANNOT connector to:"+converterProvider);
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66 e.printStackTrace();
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67 return null;
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68 }
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69 logger.debug("dC:"+result);
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70
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71 SAXBuilder db = new SAXBuilder();
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72 InputStream resultStream;
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73 try {
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74 resultStream = new ByteArrayInputStream(result.getBytes("utf-8"));
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75 } catch (UnsupportedEncodingException e) {
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76 // TODO Auto-generated catch block
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77 e.printStackTrace();
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78 return null;
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79 }
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80 Document dc;
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81 try {
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82 dc = db.build(resultStream);
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83 } catch (JDOMException e) {
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84 // TODO Auto-generated catch block
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85 e.printStackTrace();
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86 return null;
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87 } catch (IOException e) {
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88 // TODO Auto-generated catch block
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89 e.printStackTrace();
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90 return null;
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91 }
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92
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93 return dc.getRootElement();
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94 }
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95
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96 public Element getContentOfMetaTag() {
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97 SAXBuilder db = new SAXBuilder();
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98
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99 Document dc;
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100 try {
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101 dc = db.build(metaDataLink);
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102 } catch (JDOMException e) {
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103 // TODO Auto-generated catch block
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104 e.printStackTrace();
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105 return null;
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106 } catch (IOException e) {
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107 // TODO Auto-generated catch block
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108 e.printStackTrace();
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109 return null;
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110 }
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111
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112 Element retElement = null;
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113 try {
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114 XPath xp = getXPath("//meta");
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115 retElement = (Element) xp.selectSingleNode(dc);
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116
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117 } catch (JDOMException e) {
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118 //nothing to be done
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119 }
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120 if (retElement==null) { // versuche noch mal mit namespace
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121 try {
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122
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123 XPath xp = getXPath("//mpiwg:meta");
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124 retElement = (Element) xp.selectSingleNode(dc);
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125
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126 } catch (JDOMException e) {
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127 //nothing to be done
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128 }
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129
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130 }
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131 return retElement;
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132 }
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133
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134
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135 private XPath getXPath(String xpath) throws JDOMException{
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136 XPath xpathResources = XPath.newInstance(xpath);
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137
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138 xpathResources.addNamespace("mpiwg",MPIWG);
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139
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140 return xpathResources;
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141 }
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142
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143 public String getImagePathFromIndexMeta() {
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144 SAXBuilder db = new SAXBuilder();
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145
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146 Document dc;
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147 try {
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148 dc = db.build(metaDataLink);
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149 } catch (JDOMException e) {
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150 // TODO Auto-generated catch block
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151 e.printStackTrace();
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152 return null;
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153 } catch (IOException e) {
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154 // TODO Auto-generated catch block
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155 e.printStackTrace();
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156 return null;
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157 }
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158
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159 Element retElement = null;
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160 try {
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161 XPath xp = getXPath("//texttool/image");
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162 retElement = (Element) xp.selectSingleNode(dc);
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163
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164 } catch (JDOMException e) {
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165 //nothing to be done
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166 }
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167 if (retElement==null) { // versuche noch mal mit namespace
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168 try {
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169 XPath xp = getXPath("//mpiwg:texttool/mpiwg:image");
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170 retElement = (Element) xp.selectSingleNode(dc);
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171
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172 } catch (JDOMException e) {
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173 //nothing to be done
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174 }
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175
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176 }
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177 if (retElement==null)
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178 return "";
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179 return retElement.getTextTrim();
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180 }
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181
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182 }
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