package org.dbunit.assertion.comparer.value;
   
   import org.dbunit.DatabaseUnitException;
   import org.dbunit.dataset.ITable;
   import org.dbunit.dataset.datatype.DataType;
   
   /**
    * {@link ValueComparer} implementation that verifies actual value is null.
    * Note, ignores any expected value.
   *
   * @author Jeff Jensen
   * @since 2.7.3
   */
  public class IsActualNullValueComparer extends ValueComparerTemplateBase
  {
      private static final String ACTUAL_VALUE_IS_NOT_NULL =
              "Actual value is not null (ignores expected value)";
  
      @Override
      protected boolean isExpected(final ITable expectedTable,
              final ITable actualTable, final int rowNum, final String columnName,
              final DataType dataType, final Object expectedValue,
              final Object actualValue) throws DatabaseUnitException
      {
          return actualValue == null;
      }
  
      protected String makeFailMessage()
      {
          return ACTUAL_VALUE_IS_NOT_NULL;
      }
  
      @Override
      protected String getFailPhrase()
      {
          // ignored
          return null;
      }
  }