Пример #1
0
 /**
  * Gets feed attribute.
  *
  * @param index index
  * @param field field
  * @return attribute or <code>null</code> if not available
  */
 protected IFeedAttribute getFeedAttribute(Map<String, IFeedAttribute> index, DcatField field) {
   for (List<String> additives : field.getIndex()) {
     List<IFeedAttribute> lstAttributes = new ArrayList<IFeedAttribute>();
     for (String indexName : additives) {
       IFeedAttribute attr = index.get(indexName);
       if (attr != null && !attr.isEmpty()) {
         lstAttributes.add(attr);
       }
     }
     if (lstAttributes.size() == 1) return lstAttributes.get(0);
     if (lstAttributes.size() > 1)
       return IFeedAttribute.Factory.createSum(lstAttributes, field.getJoinOperator());
   }
   return null;
 }