package at.rseiler.spbee.core.pojo;
   
   import at.rseiler.spbee.core.annotation.MappingConstructor;
   import at.rseiler.spbee.core.annotation.ReturnNull;
   import at.rseiler.spbee.core.annotation.RowMapper;
   import at.rseiler.spbee.core.pojo.annotation.MappingConstructorData;
   import at.rseiler.spbee.core.pojo.annotation.RowMapperData;
   import at.rseiler.spbee.core.util.StringUtil;
   
  /**
   * Represents a variable of a ResultSet.
   *
   * @author Reinhard Seiler {@literal <rseiler.developer@gmail.com>}
   */
  public class ResultSetVariable extends Variable {
  
      private static final long serialVersionUID = -1847032188564695473L;
  
      private final boolean returnNull;
      private final RowMapperData rowMapper;
      private final MappingConstructorData mappingConstructor;
  
      /**
       * Constructs a new ResultSetVariable.
       *
       * @param name               the name of the variable
       * @param qualifiedClassName the type of the variable
       * @param rowMapper          (nullable) the RowMapper annotation of the variable
       * @param returnNull         (nullable) the ReturnNull annotation of the variable
       * @param mappingConstructor (nullable) the MappingConstructor annotation of the variable
       */
      public ResultSetVariable(String name, String qualifiedClassName, RowMapper rowMapper, ReturnNull returnNull, MappingConstructor mappingConstructor) {
          super(name, qualifiedClassName);
          this.rowMapper = rowMapper != null ? new RowMapperData(rowMapper) : null;
          this.returnNull = returnNull != null;
          this.mappingConstructor = new MappingConstructorData(mappingConstructor);
      }
  
      /**
       * Returns the qualified class name of the RowMapper.
       *
       * @return the qualified class name
       */
      public String getRowMapper() {
          if (rowMapper != null) {
              return rowMapper.getType();
          }
  
          return StringUtil.getQualifiedMapperClassName(getTypeInfo().getGenericTypeOrType(), mappingConstructor.getName());
      }
  
      /**
       * Returns if null should be used instead of throwing an exception if an entity is expected but nothing is returned
       * from the database.
       *
       * @return true if null should be used as return value
       */
      public boolean useNullInsteadOfAnException() {
          return returnNull;
      }
  
  }