Package br.com.caelum.vraptor.converter.jodatime

Source Code of br.com.caelum.vraptor.converter.jodatime.LocalDateConverter

/***
* Copyright (c) 2009 Caelum - www.caelum.com.br/opensource
* All rights reserved.
*
* 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 br.com.caelum.vraptor.converter.jodatime;

import static com.google.common.base.Strings.isNullOrEmpty;

import java.util.Locale;

import javax.inject.Inject;

import org.joda.time.LocalDate;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;

import br.com.caelum.vraptor.Convert;
import br.com.caelum.vraptor.converter.ConversionException;
import br.com.caelum.vraptor.converter.ConversionMessage;
import br.com.caelum.vraptor.converter.Converter;

/**
* VRaptor converter for {@link LocalDate}. {@link LocalDate} is part of Joda Time library.
*
* @author Lucas Cavalcanti
*/
@Convert(LocalDate.class)
public class LocalDateConverter implements Converter<LocalDate> {

  private final Locale locale;

  /**
   * @deprecated CDI eyes only
   */
  protected LocalDateConverter() {
    this(null);
  }

  @Inject
  public LocalDateConverter(Locale locale) {
    this.locale = locale;
  }

  @Override
  public LocalDate convert(String value, Class<? extends LocalDate> type) {
    if (isNullOrEmpty(value)) {
      return null;
    }
   
    try {
      return getFormatter().parseLocalDate(value);
    } catch (UnsupportedOperationException | IllegalArgumentException  e) {
      throw new ConversionException(new ConversionMessage("is_not_a_valid_date", value));
    }
  }

  protected DateTimeFormatter getFormatter() {
    return DateTimeFormat.shortDate().withLocale(locale);
  }
}
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