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  package org.apache.cayenne.unit;
  
  import java.sql.Connection;
  import java.util.Collection;
  
  import org.apache.cayenne.dba.DbAdapter;
  import org.apache.cayenne.map.DataMap;
  
  /**
   */
  public class OpenBaseUnitDbAdapter extends UnitDbAdapter {
  
      public OpenBaseUnitDbAdapter(DbAdapter adapter) {
          super(adapter);
      }
  
      @Override
      public void willDropTables(Connection conn, DataMap map, Collection tablesToDrop)
              throws Exception {
          // avoid dropping constraints...
      }
  
      @Override
      public boolean supportsHaving() {
          return false;
      }
  
      @Override
      public boolean supportsReverseComparison() {
          // TODO: andrus, 7/1/2007 I am trying to follow up with openbase on this...
          return false;
      }
  
      @Override
      public boolean supportNullRowForAggregateFunctions() {
          // TODO: andrus, 7/1/2007 I am trying to follow up with openbase on this...
          return false;
      }
  }
  