org.argeo.slc.jcr/src/org/argeo/slc/jcr/JcrMetadataWriter.java

   1 package org.argeo.slc.jcr;
   2
   3 import java.util.HashMap;
   4 import java.util.Map;
   5
   6 import javax.jcr.Node;
   7 import javax.jcr.RepositoryException;
   8
   9 import org.apache.commons.logging.Log;
  10 import org.apache.commons.logging.LogFactory;
  11 import org.argeo.jcr.JcrUtils;
  12 import org.argeo.slc.SlcException;
  13 import org.argeo.slc.SlcNames;
  14
  15 /**
  16  * Writes arbitrary metadata into a child node of a given node (or the node
  17  * itself if metadata node name is set to null)
  18  */
  19 public class JcrMetadataWriter implements Runnable {
  20         private final static Log log = LogFactory.getLog(JcrMetadataWriter.class);
  21
  22         private Node baseNode;
  23         private String metadataNodeName = SlcNames.SLC_METADATA;
  24
  25         private Map<String, String> metadata = new HashMap<String, String>();
  26
  27         public void run() {
  28                 try {
  29                         Node metadataNode;
  30                         if (metadataNodeName != null)
  31                                 metadataNode = baseNode.hasNode(metadataNodeName) ? baseNode
  32                                                 .getNode(metadataNodeName) : baseNode
  33                                                 .addNode(metadataNodeName);
  34                         else
  35                                 metadataNode = baseNode;
  36
  37                         for (String key : metadata.keySet())
  38                                 metadataNode.setProperty(key, metadata.get(key));
  39
  40                         baseNode.getSession().save();
  41
  42                         if (log.isDebugEnabled())
  43                                 log.debug("Wrote " + metadata.size() + " metadata entries to "
  44                                                 + metadataNode);
  45                 } catch (RepositoryException e) {
  46                         throw new SlcException("Cannot write metadata to " + baseNode, e);
  47                 } finally {
  48                         JcrUtils.discardUnderlyingSessionQuietly(baseNode);
  49                 }
  50
  51         }
  52
  53         public void setBaseNode(Node baseNode) {
  54                 this.baseNode = baseNode;
  55         }
  56
  57         public void setMetadataNodeName(String metadataNodeName) {
  58                 this.metadataNodeName = metadataNodeName;
  59         }
  60
  61         public void setMetadata(Map<String, String> metadata) {
  62                 this.metadata = metadata;
  63         }
  64
  65 }