1 | package eu.clarin.cmdi.mdservice.action; |
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2 | |
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3 | import java.io.BufferedInputStream; |
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4 | import java.io.BufferedReader; |
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5 | import java.io.ByteArrayInputStream; |
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6 | import java.io.ByteArrayOutputStream; |
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7 | import java.io.File; |
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8 | import java.io.FileInputStream; |
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9 | import java.io.IOException; |
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10 | import java.io.InputStream; |
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11 | import java.io.InputStreamReader; |
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12 | import java.io.OutputStream; |
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13 | import java.io.Reader; |
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14 | import java.io.StringReader; |
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15 | import java.io.StringWriter; |
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16 | import java.io.Writer; |
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17 | import java.net.URL; |
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18 | import java.util.HashMap; |
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19 | import java.util.Iterator; |
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20 | import java.util.Map; |
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21 | import java.util.Set; |
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22 | |
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23 | import javax.xml.parsers.DocumentBuilder; |
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24 | import javax.xml.parsers.DocumentBuilderFactory; |
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25 | import javax.xml.parsers.ParserConfigurationException; |
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26 | //import javax.xml.transform.ErrorListener; |
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27 | import javax.xml.transform.OutputKeys; |
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28 | import javax.xml.transform.Transformer; |
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29 | import javax.xml.transform.TransformerConfigurationException; |
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30 | import javax.xml.transform.TransformerException; |
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31 | import javax.xml.transform.TransformerFactory; |
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32 | import javax.xml.transform.TransformerFactoryConfigurationError; |
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33 | import javax.xml.transform.dom.DOMSource; |
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34 | import javax.xml.transform.stream.StreamResult; |
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35 | import javax.xml.transform.stream.StreamSource; |
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36 | |
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37 | //import ognl.IntHashMap.Entry; |
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38 | |
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39 | import net.sf.saxon.event.MessageEmitter; |
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40 | import net.sf.saxon.event.MessageWarner; |
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41 | |
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42 | import org.w3c.dom.Document; |
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43 | import org.w3c.dom.Element; |
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44 | import org.w3c.dom.Node; |
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45 | import org.w3c.dom.NodeList; |
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46 | |
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47 | //import com.icl.saxon.*; |
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48 | //import com.icl.saxon.FeatureKeys; |
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49 | //import com.icl.saxon.Loader; |
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50 | //import com.icl.saxon.output.Emitter; |
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51 | |
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52 | |
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53 | /** |
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54 | * Helper class, encapsulating the xsl-transformations handling |
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55 | * the contract is, that the requester passes a key, which can be resolved to a xsl-script (momentary mapped in properties: Admin.getConfig()) |
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56 | * Bad things happen, if the key or the appropriate xsl-file do not exist |
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57 | * |
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58 | * |
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59 | * @author vronk |
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60 | * |
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61 | */ |
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62 | |
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63 | public class MDTransformer { |
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64 | |
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65 | private URL srcFile ; |
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66 | private HashMap<String,String> params; |
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67 | |
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68 | private MDTransformer singleton; |
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69 | TransformerFactory tfactory ; |
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70 | |
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71 | public MDTransformer () { |
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72 | tfactory = TransformerFactory.newInstance(); |
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73 | } |
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74 | |
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75 | /* |
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76 | public static MDTransformer getMDTransformer () { |
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77 | if (singleton == null) { |
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78 | singleton = new MDTransformer(); |
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79 | } |
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80 | return singleton; |
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81 | } |
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82 | */ |
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83 | |
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84 | public URL getSrcFile() { |
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85 | return srcFile; |
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86 | } |
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87 | |
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88 | public void setSrcFile(URL srcFile) { |
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89 | this.srcFile = srcFile; |
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90 | } |
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91 | |
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92 | public void setParams(HashMap<String,String> params){ |
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93 | this.params = params; |
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94 | } |
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95 | |
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96 | public HashMap<String,String> getParams(){ |
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97 | return this.params; |
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98 | } |
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99 | /** |
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100 | * get the path to the transform-xsl file from properties, based on the key |
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101 | * @param key |
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102 | * @return |
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103 | * @throws NoStylesheetException - if no matching entry in properties could be found |
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104 | */ |
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105 | private String getXSLPath (String key) throws NoStylesheetException { |
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106 | String xslpath = ""; |
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107 | String xslfilename= Admin.getConfig().getProperty("xsl." + key); |
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108 | |
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109 | if (xslfilename!=null) { |
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110 | xslpath = Admin.getConfig().getProperty("scripts.path") + xslfilename; |
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111 | } else { |
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112 | throw new NoStylesheetException("No Stylesheet found for format-key: " + key); |
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113 | } |
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114 | Admin.notifyUser("xslfile:" + xslpath); |
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115 | return xslpath; |
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116 | } |
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117 | |
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118 | private StreamSource getXSLStreamSource (String key) throws NoStylesheetException{ |
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119 | |
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120 | InputStream xslstream; |
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121 | |
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122 | //URL myURL = new URL (getXSLPath(key)); |
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123 | //xslstream = myURL.openStream(); |
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124 | String xslPath = getXSLPath(key); |
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125 | xslstream = this.getClass().getClassLoader().getResourceAsStream(xslPath); |
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126 | StreamSource streamSource = new StreamSource(xslstream); |
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127 | |
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128 | //Admin.notifyUser(this.getClass().getClassLoader().getResource(xslPath).toString()); |
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129 | //Admin.notifyUser(this.getClass().getClassLoader().getResource(xslPath).getPath()); |
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130 | |
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131 | |
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132 | streamSource.setSystemId(this.getClass().getClassLoader().getResource(xslPath).toString()); |
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133 | return streamSource ; |
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134 | |
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135 | } |
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136 | |
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137 | public Object getCols() throws TransformerConfigurationException, TransformerFactoryConfigurationError{ |
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138 | |
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139 | String xmlString = null; |
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140 | // create new document |
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141 | Document doc = null; |
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142 | DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance(); |
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143 | DocumentBuilder docBuilder; |
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144 | try { |
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145 | docBuilder = docFactory.newDocumentBuilder(); |
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146 | doc = docBuilder.newDocument(); |
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147 | // append root tag <col > |
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148 | Element root = (Element) doc.createElement("root"); |
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149 | doc.appendChild(root); |
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150 | |
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151 | Element child1 = (Element) doc.createElement("col"); |
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152 | child1.setTextContent("Id"); |
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153 | root.appendChild(child1); |
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154 | Element child = (Element) doc.createElement("col"); |
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155 | child.setTextContent("Name"); |
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156 | root.appendChild(child); |
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157 | //Element child = doc.createElement("col"); |
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158 | //child.setNodeValue("Id"); |
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159 | |
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160 | |
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161 | Transformer transformer = TransformerFactory.newInstance().newTransformer(); |
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162 | transformer.setOutputProperty(OutputKeys.INDENT, "yes"); |
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163 | |
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164 | //initialize StreamResult with File object to save to file |
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165 | StreamResult result = new StreamResult(new StringWriter()); |
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166 | DOMSource source = new DOMSource(doc); |
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167 | try { |
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168 | transformer.transform(source, result); |
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169 | xmlString = result.getWriter().toString(); |
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170 | |
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171 | Admin.notifyUser(xmlString); |
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172 | } catch (TransformerException e) { |
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173 | // TODO Auto-generated catch block |
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174 | e.printStackTrace(); |
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175 | } |
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176 | |
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177 | |
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178 | |
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179 | } catch (ParserConfigurationException e) { |
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180 | // TODO Auto-generated catch block |
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181 | e.printStackTrace(); |
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182 | } |
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183 | //return xmlString; |
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184 | //return doc.getElementsByTagName("col").item(0); |
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185 | return doc.getDocumentElement(); |
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186 | } |
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187 | |
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188 | public String getTranskey(){ |
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189 | return params.get("format"); |
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190 | } |
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191 | |
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192 | public void SetTransformerParameters(Transformer transformer){ |
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193 | |
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194 | Set<Map.Entry<String,String>> set = params.entrySet(); |
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195 | Iterator<Map.Entry<String,String>> i = set.iterator(); |
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196 | |
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197 | while(i.hasNext()){ |
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198 | Map.Entry<String,String> e = (Map.Entry<String,String>)i.next(); |
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199 | transformer.setParameter((String)e.getKey(), (String)e.getValue()); |
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200 | } |
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201 | } |
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202 | |
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203 | /** |
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204 | * The main method for transforming, applies the appropriate (based on the transkey) stylesheet on the xml-stream |
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205 | * and writes the result into the output stream. |
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206 | * @param in InpuStream with xml |
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207 | * @param transkey this defines the stylesheet to use and is also passed to the stylesheet as "format"-parameter |
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208 | * @param out the stream to write the output to |
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209 | * @throws TransformerException |
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210 | * @throws IOException |
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211 | * @throws NoStylesheetException |
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212 | */ |
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213 | public void transformXML (InputStream in, OutputStream out ) throws TransformerException, IOException, NoStylesheetException { |
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214 | //public void transformXML (InputStream in, String transkey, String cols, String startRecord, String maximumRecords, String lang, String q, String repositoryURI, OutputStream out ) throws TransformerException, IOException { |
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215 | |
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216 | System.setProperty("javax.xml.transform.TransformerFactory", "net.sf.saxon.TransformerFactoryImpl"); |
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217 | // Create a transform factory instance. |
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218 | TransformerFactory tfactory = TransformerFactory.newInstance(); |
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219 | //OutputStream os = new ByteArrayOutputStream(); |
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220 | StreamResult stream = new StreamResult(out); |
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221 | |
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222 | // Create a transformer for the stylesheet. |
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223 | //String xslpath = getXSLPath(transkey); |
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224 | Transformer transformer = tfactory.newTransformer( |
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225 | getXSLStreamSource(getTranskey())); |
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226 | SetTransformerParameters(transformer); |
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227 | |
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228 | //MessageWarner gg = new net.sf.saxon.event.MessageWarner(); |
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229 | MessageEmitter me = new net.sf.saxon.event.MessageEmitter(); |
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230 | StringWriter w = new StringWriter(); |
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231 | me.setWriter(w); |
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232 | ((net.sf.saxon.Controller)transformer).setMessageEmitter(me);//new net.sf.saxon.event.MessageWarner()); |
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233 | |
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234 | /* transformer.setParameter("q", q); |
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235 | transformer.setParameter("lang", lang); |
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236 | transformer.setParameter("format", transkey); |
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237 | transformer.setParameter("cols", cols); |
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238 | if ((startRecord != null) && (maximumRecords != null)) { |
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239 | |
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240 | transformer.setParameter("startRecord", startRecord); |
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241 | transformer.setParameter("maximumRecords", maximumRecords); |
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242 | } |
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243 | if (repositoryURI != null) { |
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244 | |
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245 | transformer.setParameter("repository_uri", repositoryURI); |
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246 | } |
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247 | */ |
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248 | /* transformer.setParameter("cols", "<col label='id'>Id</col>" + |
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249 | "<col label='id'>idno</col>" + |
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250 | "<col label='name'>Name</col>" + |
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251 | "<col label='title'>Title</col>" + |
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252 | "<col label='title'>title</col>"); */ |
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253 | |
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254 | if (srcFile!=null) { |
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255 | |
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256 | File f = new File(srcFile.getPath()); |
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257 | |
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258 | //Admin.notifyUser("src:" + srcFile.getFile()); |
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259 | //Admin.notifyUser("fpath:" + f.getAbsolutePath()); |
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260 | String root_uri = srcFile.toString(); |
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261 | String xsrcfile = srcFile.getFile(); |
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262 | if (srcFile.getProtocol().equals("file")) { |
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263 | root_uri = "file:///" + f.getParent().replace('\\', '/'); |
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264 | xsrcfile = "file:///" + f.getPath().replace('\\', '/'); |
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265 | } |
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266 | // TODO repository-path -removed, bad formating |
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267 | String[] xsrcfiles = xsrcfile.split("&repository="); |
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268 | String[] root_uris = root_uri.split("&repository="); |
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269 | xsrcfile = xsrcfiles[0]; |
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270 | root_uri = root_uris[0]; |
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271 | /// |
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272 | |
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273 | Admin.notifyUser("root_uri:" + root_uri ); |
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274 | Admin.notifyUser("xsrcfile:" + xsrcfile ); |
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275 | |
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276 | transformer.setParameter("root_uri", root_uri ); |
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277 | transformer.setParameter("src_file", xsrcfile); |
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278 | } else { |
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279 | Admin.notifyUser("transformXML(): srcFile not set!!"); |
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280 | } |
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281 | // |
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282 | StreamSource src =new StreamSource(); |
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283 | src.setInputStream(in); |
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284 | // Transform the source XML to out-stream |
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285 | transformer.transform(src, stream ); |
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286 | |
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287 | // Write <xsl:message> |
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288 | writeXslMessages(w); |
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289 | ///Admin.notifyUser(w.getBuffer().toString()); |
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290 | } |
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291 | |
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292 | private void writeXslMessages(StringWriter w){ |
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293 | |
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294 | byte[] bytes = w.getBuffer().toString().getBytes(); |
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295 | InputStream is = new ByteArrayInputStream(bytes); |
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296 | BufferedReader br = new BufferedReader(new InputStreamReader(is)); |
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297 | String s; |
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298 | try { |
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299 | while ((s = br.readLine()) != null){ |
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300 | Admin.notifyUser(s); |
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301 | } |
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302 | } catch (IOException e) { |
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303 | // TODO Auto-generated catch block |
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304 | e.printStackTrace(); |
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305 | } |
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306 | |
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307 | } |
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308 | /** |
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309 | * just a wrapper for the main method translating the output-stream into a input-stream (expected by the Controller-Actions to return as response) |
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310 | * @param xmlStream the source xml stream |
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311 | * @param transkey |
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312 | * @return result-stream (converted to InputStream) |
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313 | * @throws IOException |
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314 | * @throws InterruptedException |
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315 | * @throws TransformerException |
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316 | * @throws NoStylesheetException |
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317 | */ |
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318 | public InputStream transformXML ( InputStream xmlStream) throws IOException, InterruptedException, TransformerException, NoStylesheetException { |
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319 | //public InputStream transformXML ( InputStream xmlStream, String transkey, String cols, String startRecord, String maximumRecords, String lang, String q, String repositoryURI) throws IOException, InterruptedException, TransformerException { |
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320 | |
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321 | ByteArrayOutputStream out = new ByteArrayOutputStream(); |
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322 | transformXML(xmlStream, out); |
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323 | //transformXML(xmlStream, transkey, cols, startRecord, maximumRecords, lang, q, repositoryURI, out); |
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324 | InputStream transformedStream = new ByteArrayInputStream(out.toByteArray()); |
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325 | //Admin.notifyUser("transformedStream:" + transformedStream.toString()); |
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326 | return transformedStream; |
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327 | } |
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328 | |
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329 | /** |
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330 | * just a wrapper for the main method translating the output-stream into a input-stream (expected by the Controller-Actions to return as response) |
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331 | * @param xmlStream the source xml stream |
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332 | * @param transkey |
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333 | * @return result-stream (converted to InputStream) |
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334 | * @throws IOException |
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335 | * @throws InterruptedException |
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336 | * @throws TransformerException |
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337 | */ |
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338 | /* |
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339 | public InputStream transformXML ( InputStream xmlStream, String transkey) throws IOException, InterruptedException, TransformerException { |
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340 | |
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341 | ByteArrayOutputStream out = new ByteArrayOutputStream(); |
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342 | transformXML(xmlStream, transkey, "", "", "","","", "", out); |
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343 | InputStream transformedStream = new ByteArrayInputStream(out.toByteArray()); |
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344 | //Admin.notifyUser("transformedStream:" + transformedStream.toString()); |
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345 | return transformedStream; |
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346 | } |
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347 | */ |
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348 | /** |
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349 | * another wrapper for the main method allowing to directly pass a URL to the source-xml |
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350 | * @param xmlFile URL of the source-file |
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351 | * @param transkey |
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352 | * @return the result-stream (already converted to an InputStream) |
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353 | * @throws TransformerException |
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354 | * @throws IOException |
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355 | * @throws NoStylesheetException |
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356 | */ |
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357 | public InputStream transformXML (URL xmlFile ) throws IOException, InterruptedException, TransformerException, NoStylesheetException { |
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358 | //public InputStream transformXML (URL xmlFile, String transkey ) throws IOException, InterruptedException, TransformerException { |
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359 | srcFile= xmlFile; |
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360 | InputStream xmlStream = |
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361 | new BufferedInputStream(new FileInputStream(xmlFile.getPath())); |
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362 | |
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363 | return transformXML ( xmlStream); |
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364 | } |
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365 | |
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366 | |
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367 | /** |
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368 | * this is for xml present as string. |
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369 | * if xml in a file or a stream, use the other methods |
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370 | * @param xml xml as string |
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371 | * @param transkey |
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372 | * @return |
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373 | * @throws NoStylesheetException |
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374 | * @throws IOException |
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375 | */ |
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376 | public String transformXML (String xml) throws NoStylesheetException { |
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377 | //public String transformXML (String xml, String transkey ) { |
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378 | String result=""; |
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379 | try { |
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380 | // Create a transform factory instance. |
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381 | System.setProperty("javax.xml.transform.TransformerFactory", "net.sf.saxon.TransformerFactoryImpl"); |
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382 | //System.setProperty("javax.xml.transform.TransformerFactory", "com.icl.saxon.TransformerFactoryImpl"); |
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383 | TransformerFactory tfactory = TransformerFactory.newInstance(); |
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384 | OutputStream os = new ByteArrayOutputStream(); |
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385 | StreamResult stream = new StreamResult(os); |
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386 | // Create a transformer for the stylesheet. |
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387 | Transformer transformer = tfactory.newTransformer( |
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388 | getXSLStreamSource(getTranskey())); |
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389 | /* instead of: |
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390 | InputStream xslIS = |
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391 | new BufferedInputStream(new FileInputStream(getXSLPath(transkey))); |
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392 | |
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393 | Transformer transformer = |
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394 | tfactory.newTransformer(new StreamSource(xslIS)); |
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395 | */ |
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396 | //////////////////// |
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397 | MessageEmitter me = new net.sf.saxon.event.MessageEmitter(); |
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398 | StringWriter w = new StringWriter(); |
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399 | me.setWriter(w); |
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400 | ((net.sf.saxon.Controller)transformer).setMessageEmitter(me);//new net.sf.saxon.event.MessageWarner()); |
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401 | |
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402 | // Transform the source XML to System.out. |
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403 | StreamSource src =new StreamSource(); |
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404 | Reader reader = new StringReader(xml); |
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405 | src.setReader(reader); |
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406 | |
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407 | transformer.transform(src, stream ); |
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408 | // new StreamResult(new File("Simple2.out"))); |
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409 | // Write <xsl:message> |
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410 | writeXslMessages(w); |
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411 | |
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412 | result = os.toString(); |
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413 | |
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414 | } catch (TransformerException e) { |
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415 | e.printStackTrace(); |
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416 | } |
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417 | |
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418 | return result; |
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419 | } |
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420 | |
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421 | |
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422 | public static HashMap<String,String> createParamsMap(String transkey){ |
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423 | HashMap<String,String> hm = new HashMap<String,String>(); |
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424 | |
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425 | if (transkey != null){ |
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426 | hm.put("format", transkey); |
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427 | } |
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428 | return hm; |
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429 | } |
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430 | } |
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