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  package org.apache.cayenne.access.jdbc.reader;
  
  import java.sql.ResultSet;
  
  /**
   * A row reader for complex result sets resolved as object arrays.
   * 
   * @since 3.0
   */
  class CompoundRowReader implements RowReader<Object[]> {
  
      private RowReader<?>[] readers;
  
      CompoundRowReader(int width) {
          this.readers = new RowReader[width];
      }
  
      void addRowReader(int pos, RowReader<?> reader) {
          this.readers[pos] = reader;
      }
  
      @Override
      public Object[] readRow(ResultSet resultSet) {
  
          int width = readers.length;
          Object[] row = new Object[width];
  
          for (int i = 0; i < width; i++) {
              row[i] = readers[i].readRow(resultSet);
          }
  
          return row;
      }
  }
  