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