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

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.slc.jcr;
  17
  18 import java.util.HashMap;
  19 import java.util.Map;
  20
  21 import javax.jcr.Node;
  22 import javax.jcr.RepositoryException;
  23
  24 import org.apache.commons.logging.Log;
  25 import org.apache.commons.logging.LogFactory;
  26 import org.argeo.jcr.JcrUtils;
  27 import org.argeo.slc.SlcException;
  28
  29 /**
  30  * Writes arbitrary metadata into a child node of a given node (or the node
  31  * itself if metadata node name is set to null)
  32  */
  33 public class JcrMetadataWriter implements Runnable {
  34         private final static Log log = LogFactory.getLog(JcrMetadataWriter.class);
  35
  36         private Node baseNode;
  37         private String metadataNodeName = SlcNames.SLC_METADATA;
  38
  39         private Map<String, String> metadata = new HashMap<String, String>();
  40
  41         public void run() {
  42                 try {
  43                         Node metadataNode;
  44                         if (metadataNodeName != null)
  45                                 metadataNode = baseNode.hasNode(metadataNodeName) ? baseNode
  46                                                 .getNode(metadataNodeName) : baseNode
  47                                                 .addNode(metadataNodeName);
  48                         else
  49                                 metadataNode = baseNode;
  50
  51                         for (String key : metadata.keySet())
  52                                 metadataNode.setProperty(key, metadata.get(key));
  53
  54                         baseNode.getSession().save();
  55
  56                         if (log.isDebugEnabled())
  57                                 log.debug("Wrote " + metadata.size() + " metadata entries to "
  58                                                 + metadataNode);
  59                 } catch (RepositoryException e) {
  60                         throw new SlcException("Cannot write metadata to " + baseNode, e);
  61                 } finally {
  62                         JcrUtils.discardUnderlyingSessionQuietly(baseNode);
  63                 }
  64
  65         }
  66
  67         public void setBaseNode(Node baseNode) {
  68                 this.baseNode = baseNode;
  69         }
  70
  71         public void setMetadataNodeName(String metadataNodeName) {
  72                 this.metadataNodeName = metadataNodeName;
  73         }
  74
  75         public void setMetadata(Map<String, String> metadata) {
  76                 this.metadata = metadata;
  77         }
  78
  79 }