com.autentia.intra.converter.EnumConverter.java Source code

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Here is the source code for com.autentia.intra.converter.EnumConverter.java

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/* 
 *  TNTConcept Easy Enterprise Management by Autentia Real Bussiness Solution S.L.  
 *   Copyright (C) 2007 Autentia Real Bussiness Solution S.L.                  
 *   
 *    This program is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU General Public License
 *    as published by the Free Software Foundation; either version 2
 *    of the License, or (at your option) any later version.
 *
 *    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 General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 *    Autentia Real Bussiness Solution S.L.
 *    Tlf: +34 91 675 33 06, +34 655 99 11 72
 *    Fax: +34 91 656 65 04
 *    info@autentia.com                                                
 */

package com.autentia.intra.converter;

import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.convert.ConverterException;

/**
 * JAVA5 enums converter for JSF. Converts ordinal into Enum and vice versa.
 *
 * @author ivan
 */

public class EnumConverter implements Converter {
    private static Log log = LogFactory.getLog(EnumConverter.class);

    public Object getAsObject(FacesContext context, UIComponent component, String value) throws ConverterException {
        Class clazz = component.getValueBinding("value").getType(context);
        log.debug("getAsObject - clazz=" + clazz.getName());

        Enum ret = null;
        if (!StringUtils.isEmpty(value)) {
            try {
                Enum[] values = (Enum[]) clazz.getEnumConstants();
                ret = values[Integer.parseInt(value)];
                /*
                for( Enum val : values )
                {
                   if( val.name().equals(value) )
                   {
                           ret = val;
                           break;
                   }
                }
                */
            } catch (Exception e) {
                log.warn("getAsObject - exception converting value '" + value + "' to " + clazz.getName(), e);
                throw new ConverterException("Error converting value '" + value + "' to " + clazz.getName(), e);
            }

        }
        return ret;
    }

    public String getAsString(FacesContext context, UIComponent component, Object value) throws ConverterException {
        String ret = null;
        if (value != null) {
            if (value instanceof Enum) {
                ret = Integer.toString(((Enum) value).ordinal());
            } else if (value instanceof String) {
                ret = value.toString();
            }
        }
        return ret;
    }
}