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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2013, Red Hat, Inc. and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This 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 software 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.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.richfaces.convert;

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

import com.google.common.base.Strings;

/**
 * @author Nick Belaevski
 *
 */
public final class ConverterUtil {
    public static final class StringConverter implements Converter {
        public String getAsString(FacesContext context, UIComponent component, Object value) {
            if (value == null) {
                return "";
            }

            return value.toString();
        }

        public Object getAsObject(FacesContext context, UIComponent component, String value) {
            if (Strings.isNullOrEmpty(value)) {
                return null;
            }

            return value;
        }
    }

    private static final Converter STRING_CONVERTER = new StringConverter();
    private static final Converter INTEGER_CONVERTER = new IntegerConverter();

    private ConverterUtil() {
    }

    public static Converter stringConverter() {
        return STRING_CONVERTER;
    }

    public static Converter integerConverter() {
        return INTEGER_CONVERTER;
    }
}