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   *   Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
   *  with the License.  You may obtain a copy of the License at
   *
   *    https://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing,
   *  software distributed under the License is distributed on an
   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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   ****************************************************************/
  
  package org.apache.cayenne.access.translator.select;
  
  import org.apache.cayenne.access.jdbc.ColumnDescriptor;
  import org.apache.cayenne.map.DbAttribute;
  
  /**
   * @since 4.2
   */
  class ColumnDescriptorStage implements TranslationStage {
  
      @Override
      public void perform(TranslatorContext context) {
          int i = 0;
          for(ResultNodeDescriptor resultNode : context.getResultNodeList()) {
              context.getSelectBuilder().result(resultNode::getNode);
  
              if(!resultNode.isInDataRow()) {
                  continue;
              }
  
              String name;
              DbAttribute attribute = resultNode.getDbAttribute();
              if(attribute != null) {
                  name = attribute.getName();
              } else {
                  // generated name
                  name = "__c" + i++;
              }
  
              ColumnDescriptor descriptor = new ColumnDescriptor(name, resultNode.getJdbcType(), resultNode.getJavaType());
              descriptor.setAttribute(attribute);
              descriptor.setDataRowKey(resultNode.getDataRowKey());
  
              context.getColumnDescriptors().add(descriptor);
          }
      }
  }
  