ADQL: Fix stupid error in the setReplace(...) function (error detected by Marc W. and findbugs)

 * You should have received a copy of the GNU Lesser General Public License

 * along with ADQLLibrary.  If not, see <http://www.gnu.org/licenses/>.

 * 

 * Copyright 2012 - UDS/Centre de Données astronomiques de Strasbourg (CDS)

 * Copyright 2012,2014 - UDS/Centre de Données astronomiques de Strasbourg (CDS),

 *                       Astronomisches Rechen Institute (ARI)

 */

import adql.query.ADQLObject;

import adql.query.operand.ADQLOperand;

/**

 * <p><b><u>Warning:</u><br />

 * Inappropriate geometries for this construct SHOULD throw an error message, to be defined by the service making use of ADQL.</b></p>

 * 

 * @author Grégory Mantelet (CDS)

 * @version 06/2011

 * @author Grégory Mantelet (CDS;ARI)

 * @version 1.2 (02/2014)

 */

public class RegionFunction extends GeometryFunction {

		parameter = (ADQLOperand)(toCopy.parameter.getCopy());

	}

	@Override

	public ADQLObject getCopy() throws Exception{

		return new RegionFunction(this);

	}

	@Override

	public String getName(){

		return "REGION";

	}

	@Override

	public boolean isNumeric(){

		return false;

	}

	@Override

	public boolean isString(){

		return true;

	}

				throw new NullPointerException("Impossible to remove the only required parameter of a " + getName() + " function !");

			else if (replacer instanceof ADQLOperand){

				ADQLOperand replaced = parameter;

				parameter = replaced;

				parameter = replacer;

				return replaced;

			}else

				throw new Exception("Impossible to replace an ADQLOperand by a " + replacer.getClass().getName() + " (" + replacer.toADQL() + ") !");