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

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Here is the source code for com.autentia.tnt.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 3 of the License.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

package com.autentia.tnt.converter;

import javax.faces.component.*;
import javax.faces.context.*;
import javax.faces.convert.*;

import org.apache.commons.lang.*;
import org.apache.commons.logging.*;

/**
 * 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;
    }
}