001    package hep.aida.ref.sql;
002    
003    // AIDA
004    import hep.aida.ref.tuple.Evaluator;
005    
006    /** <code>SQLEvaluator</code> extends {@link Evaluator}
007      * with SQL backend. Only intersection of SQL and math queries are supported
008      * now.
009      * <p><font color="#880088">
010      * <pre>
011      * $Log: SQLEvaluator.java,v $
012      * Revision 1.9  2007/05/23 16:38:44  hrivnac
013      * logical connections for Plotter; better UML
014      *
015      * Revision 1.8  2004/05/22 15:12:59  hrivnac
016      * class id reformated
017      *
018      * Revision 1.7  2004/05/03 19:22:30  hrivnac
019      * basic support for JAS3
020      *
021      * Revision 1.6  2004/04/14 13:39:46  hrivnac
022      * 1.5 warnings fixed
023      *
024      * Revision 1.5  2004/02/10 14:50:58  hrivnac
025      * JavaDoc tags completed
026      *
027      * Revision 1.4  2003/11/05 19:46:22  hrivnac
028      * - FreeHEP 1.2.1
029      * - JAIDA 3.2.1
030      *
031      * Revision 1.2  2003/10/02 10:00:40  hrivnac
032      * Cleaning.
033      *
034      * Revision 1.1  2003/09/30 16:46:02  hrivnac
035      * - Writing test in TestWrite
036      * - SQLTuple projections supported
037      *
038      * </pre>
039      * </font></p>
040      * @opt attributes
041      * @opt operations
042      * @opt types
043      * @opt visibility
044      * @version $Id: SQLEvaluator.java,v 1.9 2007/05/23 16:38:44 hrivnac Exp $
045      * @author <a href="mailto:Julius.Hrivnac@cern.ch">J.Hrivnac</a> */
046    public class SQLEvaluator extends Evaluator {
047    
048      /** Create an evaluator from an expression. Currently, SQL expresion
049        * should be used within SQLTuple.
050        * @param expression The algebraic (or SQL in case of SQLTuple) expression. */
051      public SQLEvaluator(String expression) {
052        super(expression);
053        }
054    
055      }