NodeIndexer.java

   1 package org.argeo.slc.repo;
   2
   3 import javax.jcr.Node;
   4 import javax.jcr.observation.EventListener;
   5
   6 /**
   7  * Adds metadata to an existing node, ideally via observation after it has been
   8  * added. There is a similar concept in ModeShape with which this abstraction
   9  * may be merged in the future.
  10  */
  11 public interface NodeIndexer {
  12         /**
  13          * Whether the node at this path will be supported. This is typically use in
  14          * an {@link EventListener} before the node is loaded, and would apply on
  15          * information contained in the path / file name: file extension, base path,
  16          * etc. If the node needs to be loaded, the recommended approach is to
  17          * return <code>true</code> here and wait for index to be called, possibly
  18          * returning without processing if the node should not be indexed. While
  19          * not strictly a requirement, this avoids to open sessions in the indexer,
  20          * centralizing such tasks in the caller.
  21          */
  22         public Boolean support(String path);
  23
  24         /**
  25          * Adds the metadata. This is the responsibility of the caller to save the
  26          * underlying session.
  27          */
  28         public void index(Node node);
  29 }