Package org.pentaho.jfreereport.legacy

Source Code of org.pentaho.jfreereport.legacy.ColumnMultiplyExpression

/*
* 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) 2008 - 2009 Pentaho Corporation, .  All rights reserved.
*/

package org.pentaho.jfreereport.legacy;

import java.math.BigDecimal;

import org.pentaho.reporting.engine.classic.core.function.ColumnAggregationExpression;

/**
* @deprecated These functions are no longer supported.
*/
public class ColumnMultiplyExpression extends ColumnAggregationExpression
{

  public ColumnMultiplyExpression()
  {
  }


  /**
   * Return the current expression value. <P> The value depends (obviously) on
   * the expression implementation.
   *
   * @return the value of the function.
   */
  public Object getValue()
  {
    Object[] values = getFieldValues();
    BigDecimal computedResult = null;
    for (int i = 0; i < values.length; i++)
    {
      Object value = values[i];
      if (value instanceof Number)
      {
        Number n = (Number) value;
        if (computedResult == null)
        {
          //noinspection ObjectToString
          computedResult = new BigDecimal(n.toString());
        }
        else
        {
          //noinspection ObjectToString
          computedResult = computedResult.multiply(new BigDecimal(n.toString()));
        }
      }
    }

    if (computedResult != null)
    {
      return computedResult.stripTrailingZeros();
    }
    else
    {
      return null;
    }
  }
}
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