CharacterConverter.java example

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ceres-master
/*
 * Copyright (C) 2010 Brockmann Consult GmbH (info@brockmann-consult.de)
 *
 * 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, 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, see http://www.gnu.org/licenses/
 */

package com.bc.ceres.binding.converters;

import com.bc.ceres.binding.Converter;
import com.bc.ceres.binding.ConversionException;

public class CharacterConverter implements Converter<Character> {
    @Override
    public Class<Character> getValueType() {
        return Character.class;
    }

    @Override
    public Character parse(String text) throws ConversionException {
        if (text.isEmpty()) {
            return null;
        }
        if (text.length() > 1) {
            throw new ConversionException("Not a character: " + text);
        }
        return text.charAt(0);
    }

    @Override
    public String format(Character value)  {
        if (value == null) {
            return "";
        }
        return value.toString();
    }
}