net.mlw.vlh.adapter.hibernate3.util.setter.DoubleSetter.java Source code

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Here is the source code for net.mlw.vlh.adapter.hibernate3.util.setter.DoubleSetter.java

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/**
 * Copyright (c) 2003 held jointly by the individual authors.            
 *                                                                          
 * 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; with out 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.              
 *                                                                            
 * > http://www.gnu.org/copyleft/lesser.html                                  
 * > http://www.opensource.org/licenses/lgpl-license.php
 */
package net.mlw.vlh.adapter.hibernate3.util.setter;

import java.text.ParseException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.HibernateException;
import org.hibernate.Query;

/** Sets a <code>Double</code> on a <code>Query</code>. Conversion from a string is provided using <code>Double.parseDouble()</code>.
 * 
 * @author Matthew L. Wilson
 * @version $Revision: 1.3 $ $Date: 2005/12/19 12:22:26 $
 */
public class DoubleSetter extends AbstractSetter {
    /**
     * Logger for this class
     */
    private static final Log LOGGER = LogFactory.getLog(DoubleSetter.class);

    /**
     * @see net.mlw.vlh.adapter.hibernate3.util.Setter#set(Query, String, Object)
     */
    public void set(Query query, String key, Object value) throws HibernateException, ParseException {
        if (value instanceof Double) {
            if (LOGGER.isInfoEnabled()) {
                LOGGER.info("The key='" + key + "'s value is instance of a Double, now is converting to double.");
            }
            double doubleValue = ((Double) value).doubleValue();
            query.setDouble(key, doubleValue);
        } else if (value instanceof String) {
            if (LOGGER.isInfoEnabled()) {
                LOGGER.info("The key='" + key + "'s value is instance of a String, now is parsing to double.");
            }
            double doubleValue = Double.parseDouble((String) value);
            query.setDouble(key, doubleValue);
        } else if (value == null) {
            if (LOGGER.isInfoEnabled()) {
                LOGGER.info("The key='" + key + "'s value is null.");
            }
            query.setParameter(key, null);
        } else {
            throw new IllegalArgumentException(
                    "Cannot convert value of class " + value.getClass().getName() + " to double (key=" + key + ")");
        }
    }
}