예제 #1
0
  /**
   * INTERNAL: This method is used when computing the nested queries for batch read mappings. It
   * recurses computing the nested mapping queries.
   */
  protected void computeNestedQueriesForBatchReadExpressions(Vector batchReadExpressions) {
    for (int index = 0; index < batchReadExpressions.size(); index++) {
      ObjectExpression objectExpression = (ObjectExpression) batchReadExpressions.get(index);

      // Expression may not have been initialized.
      ExpressionBuilder builder = objectExpression.getBuilder();
      builder.setSession(getSession().getRootSession(null));
      builder.setQueryClass(getReferenceClass());

      // PERF: Cache join attribute names.
      ObjectExpression baseExpression = objectExpression;
      while (!baseExpression.getBaseExpression().isExpressionBuilder()) {
        baseExpression = (ObjectExpression) baseExpression.getBaseExpression();
      }
      this.batchReadAttributes.add(baseExpression.getName());

      // Ignore nested
      if (objectExpression.getBaseExpression().isExpressionBuilder()) {
        DatabaseMapping mapping = objectExpression.getMapping();
        if ((mapping != null) && mapping.isForeignReferenceMapping()) {
          // A nested query must be built to pass to the descriptor that looks like the real query
          // execution would.
          ReadQuery nestedQuery = ((ForeignReferenceMapping) mapping).prepareNestedBatchQuery(this);
          // Register the nested query to be used by the mapping for all the objects.
          getBatchReadMappingQueries().put(mapping, nestedQuery);
        }
      }
    }
  }
예제 #2
0
 /** INTERNAL: Return if the attribute is specified for batch reading. */
 public boolean isAttributeBatchRead(String attributeName) {
   if (!hasBatchReadAttributes()) {
     return false;
   }
   Vector batchReadAttributeExpressions = getBatchReadAttributeExpressions();
   int size = batchReadAttributeExpressions.size();
   for (int index = 0; index < size; index++) {
     QueryKeyExpression expression = (QueryKeyExpression) batchReadAttributeExpressions.get(index);
     while (!expression.getBaseExpression().isExpressionBuilder()) {
       expression = (QueryKeyExpression) expression.getBaseExpression();
     }
     if (expression.getName().equals(attributeName)) {
       return true;
     }
   }
   return false;
 }