/**
* =========================================
* LibFormula : a free Java formula library
* =========================================
*
* Project Info: http://reporting.pentaho.org/libformula/
*
* (C) Copyright 2006-2008, by Pentaho Corporation and Contributors.
*
* This library 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 library 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
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
*
* ------------
* PlusSignOperator.java
* ------------
*/
package org.pentaho.reporting.libraries.formula.operators;
import org.pentaho.reporting.libraries.formula.EvaluationException;
import org.pentaho.reporting.libraries.formula.FormulaContext;
import org.pentaho.reporting.libraries.formula.LibFormulaErrorValue;
import org.pentaho.reporting.libraries.formula.lvalues.TypeValuePair;
/**
* This is a no-op-operator which is equal to "zero plus x".
*
* @author Thomas Morgner
*/
public class PlusSignOperator implements PrefixOperator
{
private static final long serialVersionUID = 8127033177252320339L;
public PlusSignOperator()
{
}
public TypeValuePair evaluate(final FormulaContext context,
final TypeValuePair value1) throws EvaluationException
{
if (value1 == null)
{
// This is fatal, but should never happen.
throw new EvaluationException(LibFormulaErrorValue.ERROR_UNEXPECTED_VALUE);
}
return value1;
}
public String toString()
{
return "+";
}
}