コード例 #1
0
  /**
   * Check if the named node type is in use in any workspace in the repository
   *
   * @param nodeTypeName the name of the node type to check
   * @return true if at least one node is using that type; false otherwise
   * @throws InvalidQueryException if there is an error searching for uses of the named node type
   */
  boolean isNodeTypeInUse(Name nodeTypeName) throws InvalidQueryException {

    String nodeTypeString = nodeTypeName.getString(context.getNamespaceRegistry());
    String expression = "SELECT * from [" + nodeTypeString + "] LIMIT 1";
    TypeSystem typeSystem = context.getValueFactories().getTypeSystem();
    // Parsing must be done now ...
    QueryCommand command = queryParser.parseQuery(expression, typeSystem);
    assert command != null : "Could not parse " + expression;

    Schemata schemata = getRepositorySchemata();

    // Now query the entire repository for any nodes that use this node type ...
    RepositoryCache repoCache = repository.repositoryCache();
    RepositoryQueryManager queryManager = repository.queryManager();
    Set<String> workspaceNames = repoCache.getWorkspaceNames();
    Map<String, NodeCache> overridden = null;
    NodeTypes nodeTypes = repository.nodeTypeManager().getNodeTypes();
    RepositoryIndexes indexDefns = repository.queryManager().getIndexes();
    CancellableQuery query =
        queryManager.query(
            context,
            repoCache,
            workspaceNames,
            overridden,
            command,
            schemata,
            indexDefns,
            nodeTypes,
            null,
            null);
    try {
      QueryResults result = query.execute();
      if (result.isEmpty()) return false;
      if (result.getRowCount() < 0) {
        // Try to get the first row ...
        NodeSequence seq = result.getRows();
        Batch batch = seq.nextBatch();
        while (batch != null) {
          if (batch.hasNext()) return true;
          // It's not common for the first batch may be empty, but it's possible. So try the next
          // batch ...
          batch = seq.nextBatch();
        }
        return false;
      }
      return result.getRowCount() > 0;
    } catch (RepositoryException e) {
      logger.error(e, JcrI18n.errorCheckingNodeTypeUsage, nodeTypeName, e.getLocalizedMessage());
      return true;
    }
  }
コード例 #2
0
 /**
  * Load all of the rows from the supplied sequence into the buffer.
  *
  * @param sequence the node sequence; may not be null
  * @param extractor the extractor for the sortable value; may not be null
  * @param rowsWithNullKey the buffer into which should be placed all rows for which the extracted
  *     key value is null; may be null if these are not to be kept
  * @return the size of the first batch, or 0 if there are no rows found
  */
 protected int loadAll(
     NodeSequence sequence,
     ExtractFromRow extractor,
     DistinctBuffer<BufferedRow> rowsWithNullKey) {
   // Put all of the batches from the sequence into the buffer
   Batch batch = sequence.nextBatch();
   int batchSize = 0;
   Object value = null;
   while (batch != null && batchSize == 0) {
     while (batch.hasNext()) {
       batch.nextRow();
       value = extractor.getValueInRow(batch);
       if (value instanceof Object[]) {
         // Put each of the values in the buffer ...
         for (Object v : (Object[]) value) {
           buffer.put(v, createRow(batch));
         }
       } else if (value != null) {
         buffer.put(value, createRow(batch));
       } else if (rowsWithNullKey != null) {
         rowsWithNullKey.addIfAbsent(createRow(batch));
       }
       ++batchSize;
     }
     batch = sequence.nextBatch();
   }
   while (batch != null) {
     while (batch.hasNext()) {
       batch.nextRow();
       value = extractor.getValueInRow(batch);
       if (value instanceof Object[]) {
         // Put each of the values in the buffer ...
         for (Object v : (Object[]) value) {
           buffer.put(v, createRow(batch));
         }
       } else if (value != null) {
         buffer.put(value, createRow(batch));
       } else if (rowsWithNullKey != null) {
         rowsWithNullKey.addIfAbsent(createRow(batch));
       }
     }
     batch = sequence.nextBatch();
   }
   return batchSize;
 }