001    /**
002     * =========================================
003     * LibFormula : a free Java formula library
004     * =========================================
005     *
006     * Project Info:  http://reporting.pentaho.org/libformula/
007     *
008     * (C) Copyright 2006-2007, by Pentaho Corporation and Contributors.
009     *
010     * This library is free software; you can redistribute it and/or modify it under the terms
011     * of the GNU Lesser General Public License as published by the Free Software Foundation;
012     * either version 2.1 of the License, or (at your option) any later version.
013     *
014     * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
015     * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016     * See the GNU Lesser General Public License for more details.
017     *
018     * You should have received a copy of the GNU Lesser General Public License along with this
019     * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020     * Boston, MA 02111-1307, USA.
021     *
022     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023     * in the United States and other countries.]
024     *
025     *
026     * ------------
027     * $Id: IsNonTextFunction.java 3521 2007-10-16 10:55:14Z tmorgner $
028     * ------------
029     * (C) Copyright 2006-2007, by Pentaho Corporation.
030     */
031    package org.jfree.formula.function.information;
032    
033    import org.jfree.formula.EvaluationException;
034    import org.jfree.formula.FormulaContext;
035    import org.jfree.formula.function.ParameterCallback;
036    import org.jfree.formula.lvalues.TypeValuePair;
037    import org.jfree.formula.typing.coretypes.LogicalType;
038    
039    /**
040     * This function retruns false if the given value is of type Text.
041     *
042     * @author Cedric Pronzato
043     *
044     */
045    public class IsNonTextFunction extends IsTextFunction
046    {
047      private static final TypeValuePair RETURN_TRUE = new TypeValuePair(LogicalType.TYPE, Boolean.TRUE);
048      private static final TypeValuePair RETURN_FALSE = new TypeValuePair(LogicalType.TYPE, Boolean.FALSE);
049    
050      public IsNonTextFunction()
051      {
052      }
053    
054      public TypeValuePair evaluate(final FormulaContext context, final ParameterCallback parameters) throws EvaluationException
055      {
056        final TypeValuePair typeValuePair = super.evaluate(context, parameters);
057        if(typeValuePair.getValue().equals(Boolean.TRUE))
058        {
059          return RETURN_FALSE;
060        }
061        else
062        {
063          return RETURN_TRUE;
064        }
065      }
066    
067      public String getCanonicalName()
068      {
069        return "ISNONTEXT";
070      }
071    
072    }