StringToEnumConverter.java

/*******************************************************************************
 * Copyright 2013 Thomas Letsch (contact@thomas-letsch.de)
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package org.vaadin.addons.javaee.fields.converter;

import java.util.Locale;

import org.vaadin.addons.javaee.i18n.TranslationService;

import com.vaadin.data.util.converter.Converter;

@SuppressWarnings("rawtypes")
public class StringToEnumConverter implements Converter<String, Enum> {

    private static final long serialVersionUID = 1L;

    private TranslationService translationService;

    public StringToEnumConverter(TranslationService translationService) {
        this.translationService = translationService;
    }

    @Override
    public Enum convertToModel(String value, Class<? extends Enum> targetType, Locale locale) throws Converter.ConversionException {
        return null;
    }

    @Override
    public String convertToPresentation(Enum value, Class<? extends String> targetType, Locale locale) throws Converter.ConversionException {
        if (value == null) {
            return null;
        }
        return translationService.getText(value.getClass().getSimpleName() + "." + value.name());
    }

    @Override
    public Class<Enum> getModelType() {
        return Enum.class;
    }

    @Override
    public Class<String> getPresentationType() {
        return String.class;
    }

}