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   1 package org.collectionspace.services.nuxeo.listener.relation;
   2
   3 import java.io.Serializable;
   4 import java.util.Map;
   5 import org.apache.commons.logging.Log;
   6 import org.apache.commons.logging.LogFactory;
   7 import org.nuxeo.ecm.core.api.ClientException;
   8 import org.nuxeo.ecm.core.api.DocumentModel;
   9 import org.nuxeo.ecm.core.api.DocumentRef;
  10 import org.nuxeo.ecm.core.event.Event;
  11 import org.nuxeo.ecm.core.event.EventContext;
  12 import org.nuxeo.ecm.core.event.EventListener;
  13 import org.nuxeo.ecm.core.event.impl.DocumentEventContext;
  14
  15 public class RelationSubOrObjDeletionListener implements EventListener {
  16
  17     public static final String WORKFLOW_TRANSITION_TO = "to";
  18     public static final String WORKFLOW_TRANSITION_DELETED = "deleted";
  19     // FIXME We might experiment here with using log4j here instead of Apache Commons Logging
  20     final Log logger = LogFactory.getLog(RelationSubOrObjDeletionListener.class);
  21
  22     public void handleEvent(Event event) throws ClientException {
  23         logger.info("In handleEvent in RelationSubOrObjDeletionListener ...");
  24
  25         EventContext eventContext = event.getContext();
  26
  27         if (isDocumentSoftDeletedEvent(eventContext)) {
  28
  29             DocumentEventContext docContext = (DocumentEventContext) eventContext;
  30             DocumentModel docModel = docContext.getSourceDocument();
  31
  32             // FIXME: Temporary for debugging
  33             logger.debug("docType=" + docModel.getType());
  34             logger.debug("id=" + docModel.getSourceId());
  35             logger.debug("transition to=" + docContext.getProperties().get(WORKFLOW_TRANSITION_TO));
  36
  37             // Get a list of relation records where the just-soft-deleted
  38             // document is either the subject or object of the relation
  39
  40             // Cycle through the list, soft deleting each of these relation records
  41
  42         }
  43
  44     }
  45
  46     /**
  47      * Identifies whether a supplied event concerns a document that has
  48      * been transitioned to the 'deleted' workflow state.
  49      *
  50      * @param eventContext an event context
  51      *
  52      * @return true if this event concerns a document that has
  53      * been transitioned to the 'deleted' workflow state.
  54      */
  55     private boolean isDocumentSoftDeletedEvent(EventContext eventContext) {
  56         boolean isSoftDeletedEvent = false;
  57         if (eventContext instanceof DocumentEventContext) {
  58             if (eventContext.getProperties().containsKey(WORKFLOW_TRANSITION_TO)
  59                     && eventContext.getProperties().get(WORKFLOW_TRANSITION_TO).equals(WORKFLOW_TRANSITION_DELETED)) {
  60                 isSoftDeletedEvent = true;
  61             }
  62         }
  63         return isSoftDeletedEvent;
  64     }
  65 }