/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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.
*
* Copyright (c) 2006 - 2013 Pentaho Corporation and Contributors. All rights reserved.
*/
package org.pentaho.reporting.libraries.formula.function.logical;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.pentaho.reporting.libraries.formula.ErrorValue;
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.function.Function;
import org.pentaho.reporting.libraries.formula.function.ParameterCallback;
import org.pentaho.reporting.libraries.formula.lvalues.TypeValuePair;
import org.pentaho.reporting.libraries.formula.typing.Type;
import org.pentaho.reporting.libraries.formula.typing.coretypes.ErrorType;
import org.pentaho.reporting.libraries.formula.typing.coretypes.LogicalType;
/**
* Creation-Date: 04.11.2006, 18:28:15
*
* @author Thomas Morgner
*/
public class IfNaFunction implements Function
{
private static final Log logger = LogFactory.getLog(IfNaFunction.class);
private static final long serialVersionUID = -7517668261071087411L;
public IfNaFunction()
{
}
public String getCanonicalName()
{
return "IFNA";
}
public TypeValuePair evaluate(final FormulaContext context,
final ParameterCallback parameters)
throws EvaluationException
{
final int parameterCount = parameters.getParameterCount();
if (parameterCount < 2)
{
throw EvaluationException.getInstance(LibFormulaErrorValue.ERROR_ARGUMENTS_VALUE);
}
Object value = null;
Type type = null;
boolean nafound = false;
try
{
type = parameters.getType(0);
value = parameters.getValue(0);
if (ErrorType.TYPE.equals(type) && value instanceof ErrorValue)
{
logger.warn("Passing errors around is deprecated. Throw exceptions instead.");
final ErrorValue na = (ErrorValue) value;
if (na.getErrorCode() == LibFormulaErrorValue.ERROR_NA)
{
nafound = true;
}
}
else
{
if (value == null)
{
nafound = true;
}
}
}
catch (EvaluationException e)
{
if (e.getErrorValue().getErrorCode() == LibFormulaErrorValue.ERROR_NA)
{
nafound = true;
}
else
{
// here the error propagates, as IFNA([x],"v") is defined to behave like IF(ISNA([x]); "v"; [x])
// and the second evaluation of [X] may yield the error that was swallowed by ISNA.
throw e;
}
}
if (nafound == false)
{
return new TypeValuePair(type, value);
}
return new TypeValuePair(parameters.getType(1), parameters.getValue(1));
}
}