/*
 * JBoss, Home of Professional Open Source
 * Copyright 2005, JBoss Inc., and individual contributors as indicated
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jboss.ejb.plugins.cmp.ejbql;

import org.jboss.ejb.plugins.cmp.jdbc.JDBCResultSetReader;
import org.jboss.logging.Logger;

import java.sql.SQLException;
import java.sql.ResultSet;

/**
 * This abstract syntax node represents a LCase function.
 *
 * @author <a href="mailto:dain@daingroup.com">Dain Sundstrom</a>
 * @author <a href="mailto:alex@jboss.org">Alex Loubyansky</a>
 * @version $Revision: 1.1.4.5 $
 */
public final class ASTLCase
   extends SimpleNode
   implements SelectFunction
{
   private final Logger log;

   public ASTLCase(int id)
   {
      super(id);
      log = Logger.getLogger(getClass());
   }

   /** Accept the visitor. **/
   public Object jjtAccept(JBossQLParserVisitor visitor, Object data)
   {
      return visitor.visit(this, data);
   }

   /**
    * Reads results.
    * @param rs  the result set to read from.
    * @return  the result of the function
    * @throws SQLException
    */
   public Object readResult(ResultSet rs) throws SQLException
   {
      return JDBCResultSetReader.STRING_READER.get(rs, 1, String.class, log);
   }
}
