/*
* 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.operators;
import java.math.BigDecimal;
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.util.NumberUtil;
import org.pentaho.reporting.libraries.formula.lvalues.TypeValuePair;
import org.pentaho.reporting.libraries.formula.typing.Type;
import org.pentaho.reporting.libraries.formula.typing.TypeRegistry;
import org.pentaho.reporting.libraries.formula.typing.coretypes.NumberType;
/**
* Creation-Date: 02.11.2006, 10:27:03
*
* @author Thomas Morgner
*/
public class MinusSignOperator implements PrefixOperator
{
private static final BigDecimal ZERO = new BigDecimal(0.0);
private static final long serialVersionUID = 7453766552980074751L;
public MinusSignOperator()
{
}
public TypeValuePair evaluate(final FormulaContext context,
final TypeValuePair value1)
throws EvaluationException
{
final Type type = value1.getType();
final Object val = value1.getValue();
if (val == null)
{
throw EvaluationException.getInstance(LibFormulaErrorValue.ERROR_NA_VALUE);
}
if (type.isFlagSet(Type.NUMERIC_TYPE))
{
final TypeRegistry typeRegistry = context.getTypeRegistry();
// return the same as zero minus value.
final Number number = typeRegistry.convertToNumber(type, val);
if (number == null)
{
throw EvaluationException.getInstance
(LibFormulaErrorValue.ERROR_INVALID_ARGUMENT_VALUE);
}
final BigDecimal value = NumberUtil.getAsBigDecimal(number);
return new TypeValuePair(NumberType.GENERIC_NUMBER, ZERO.subtract(value));
}
if(val instanceof Number)
{
final BigDecimal value = NumberUtil.getAsBigDecimal((Number)val);
if (value == null)
{
throw EvaluationException.getInstance
(LibFormulaErrorValue.ERROR_INVALID_ARGUMENT_VALUE);
}
return new TypeValuePair(type, ZERO.subtract(value));
}
throw EvaluationException.getInstance
(LibFormulaErrorValue.ERROR_INVALID_ARGUMENT_VALUE);
}
public String toString()
{
return "-";
}
}