runtime/org.argeo.slc.detached/src/main/java/org/argeo/slc/detached/DetachedXmlConverterCompat.java

   1 package org.argeo.slc.detached;
   2
   3 import java.io.StringReader;
   4 import java.io.StringWriter;
   5 import java.util.Enumeration;
   6 import java.util.Properties;
   7
   8 import javax.xml.transform.Result;
   9 import javax.xml.transform.Source;
  10 import javax.xml.transform.Transformer;
  11 import javax.xml.transform.TransformerException;
  12 import javax.xml.transform.TransformerFactory;
  13 import javax.xml.transform.dom.DOMResult;
  14 import javax.xml.transform.dom.DOMSource;
  15 import javax.xml.transform.stream.StreamResult;
  16 import javax.xml.transform.stream.StreamSource;
  17
  18 import org.apache.commons.io.IOUtils;
  19 import org.apache.commons.logging.Log;
  20 import org.apache.commons.logging.LogFactory;
  21 import org.w3c.dom.Document;
  22 import org.w3c.dom.Element;
  23 import org.w3c.dom.NodeList;
  24
  25 /**
  26  * For compatibility with old JDKs (pre 1.5). Use Spring base one when possible.
  27  */
  28 public class DetachedXmlConverterCompat implements DetachedXmlConverter {
  29         public final static String SLC_DETACHED_NAMESPACE_URI = "http://argeo.org/projects/slc/schemas/detached";
  30         private final static Log log = LogFactory
  31                         .getLog(DetachedXmlConverterCompat.class);
  32
  33         private final Transformer copy;
  34
  35         public DetachedXmlConverterCompat() {
  36                 try {
  37                         copy = TransformerFactory.newInstance().newTransformer();
  38                 } catch (Exception e) {
  39                         throw new DetachedException("Could not create transformer.", e);
  40                 }
  41         }
  42
  43         public void marshallCommunication(DetachedCommunication detCom,
  44                         Result result) {
  45                 if (detCom instanceof DetachedRequest) {
  46                         marshallRequest((DetachedRequest) detCom, result);
  47                 } else if (detCom instanceof DetachedAnswer) {
  48                         marshallAnswer((DetachedAnswer) detCom, result);
  49                 } else {
  50                         throw new DetachedException("Unkown communication type "
  51                                         + detCom.getClass());
  52                 }
  53         }
  54
  55         public DetachedCommunication unmarshallCommunication(Source source) {
  56                 // Parse
  57                 DOMResult result = new DOMResult();
  58                 try {
  59                         copy.transform(source, result);
  60                 } catch (TransformerException e) {
  61                         throw new DetachedException("Could not copy xml source", e);
  62                 }
  63
  64                 if (log.isDebugEnabled()) {
  65                         try {
  66                                 DOMSource domSource = new DOMSource(result.getNode());
  67                                 StringWriter stringWriter = new StringWriter();
  68                                 StreamResult streamResult = new StreamResult(stringWriter);
  69                                 copy.transform(domSource, streamResult);
  70                                 log.debug("Unmarshall communication:\n"
  71                                                 + stringWriter.toString());
  72                                 IOUtils.closeQuietly(stringWriter);
  73                         } catch (TransformerException e) {
  74                                 log.warn("Could not log xml source", e);
  75                         }
  76                 }
  77                 Element root = (Element) ((Document) result.getNode())
  78                                 .getDocumentElement();
  79
  80                 // Create objects
  81                 String requestType = root.getLocalName();
  82                 if (requestType.equals("detached-request")) {
  83                         DetachedRequest request = new DetachedRequest();
  84                         request.setUuid(root.getElementsByTagNameNS(
  85                                         SLC_DETACHED_NAMESPACE_URI, "uuid").item(0)
  86                                         .getTextContent());
  87                         request
  88                                         .setRef(root.getElementsByTagNameNS(
  89                                                         SLC_DETACHED_NAMESPACE_URI, "ref").item(0)
  90                                                         .getTextContent());
  91                         request.setPath(root.getElementsByTagNameNS(
  92                                         SLC_DETACHED_NAMESPACE_URI, "path").item(0)
  93                                         .getTextContent());
  94                         Element propertiesElement = (Element) root.getElementsByTagNameNS(
  95                                         SLC_DETACHED_NAMESPACE_URI, "properties").item(0);
  96                         NodeList propElements = propertiesElement.getElementsByTagNameNS(
  97                                         SLC_DETACHED_NAMESPACE_URI, "prop");
  98                         Properties properties = new Properties();
  99                         for (int i = 0; i < propElements.getLength(); i++) {
 100                                 Element propElement = (Element) propElements.item(i);
 101                                 String key = propElement.getAttribute("key");
 102                                 String value = propElement.getTextContent();
 103                                 properties.setProperty(key, value);
 104                         }
 105                         request.setProperties(properties);
 106                         return request;
 107                 } else {
 108                         throw new DetachedException(requestType + " not implemented.");
 109                 }
 110         }
 111
 112         public void marshallAnswer(DetachedAnswer answer, Result result) {
 113                 StringBuffer buf = new StringBuffer("");
 114                 buf.append("<slc-det:detached-answer xmlns:slc-det=\""
 115                                 + SLC_DETACHED_NAMESPACE_URI + "\">");
 116                 if (answer.getUuid() != null)
 117                         buf.append("<slc-det:uuid>").append(answer.getUuid()).append(
 118                                         "</slc-det:uuid>");
 119                 buf.append("<slc-det:status>").append(answer.getStatus()).append(
 120                                 "</slc-det:status>");
 121                 if (answer.getLog() != null)
 122                         buf.append("<slc-det:log>").append(answer.getLog()).append(
 123                                         "</slc-det:log>");
 124                 if (answer.getProperties().size() != 0) {
 125                         buf.append("<slc-det:properties>");
 126                         Enumeration keys = answer.getProperties().keys();
 127                         while (keys.hasMoreElements()) {
 128                                 String key = (String) keys.nextElement();
 129                                 buf.append("<slc-det:prop key=\"").append(key).append("\">");
 130                                 buf.append(answer.getProperties().getProperty(key));
 131                                 buf.append("</slc-det:prop>");
 132                         }
 133                         buf.append("</slc-det:properties>");
 134                 }
 135                 buf.append("</slc-det:detached-answer>");
 136                 StringReader reader = new StringReader(buf.toString());
 137                 Source source = new StreamSource(reader);
 138                 try {
 139                         copy.transform(source, result);
 140                 } catch (TransformerException e) {
 141                         throw new DetachedException("Could not copy xml to result", e);
 142                 } finally {
 143                         IOUtils.closeQuietly(reader);
 144                 }
 145         }
 146
 147         public void marshallRequest(DetachedRequest request, Result result) {
 148                 throw new DetachedException(" Not implemented.");
 149         }
 150
 151         public DetachedRequest unmarshallRequest(Source source) {
 152                 DOMResult result = new DOMResult();
 153                 try {
 154                         copy.transform(source, result);
 155                 } catch (TransformerException e) {
 156                         throw new DetachedException("Could not copy xml source", e);
 157                 }
 158                 Element node = (Element) ((Document) result.getNode())
 159                                 .getDocumentElement();
 160                 DetachedRequest request = new DetachedRequest();
 161                 request.setUuid(node.getElementsByTagNameNS(SLC_DETACHED_NAMESPACE_URI,
 162                                 "uuid").item(0).getTextContent());
 163                 request.setRef(node.getElementsByTagNameNS(SLC_DETACHED_NAMESPACE_URI,
 164                                 "ref").item(0).getTextContent());
 165                 request.setPath(node.getElementsByTagNameNS(SLC_DETACHED_NAMESPACE_URI,
 166                                 "path").item(0).getTextContent());
 167                 Element propertiesElement = (Element) node.getElementsByTagNameNS(
 168                                 SLC_DETACHED_NAMESPACE_URI, "properties").item(0);
 169                 NodeList propElements = propertiesElement.getElementsByTagNameNS(
 170                                 SLC_DETACHED_NAMESPACE_URI, "prop");
 171                 Properties properties = new Properties();
 172                 for (int i = 0; i < propElements.getLength(); i++) {
 173                         Element propElement = (Element) propElements.item(i);
 174                         String key = propElement.getAttribute("key");
 175                         String value = propElement.getTextContent();
 176                         properties.setProperty(key, value);
 177                 }
 178                 request.setProperties(properties);
 179                 return request;
 180         }
 181 }