/***
* 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.l10n;
import static com.google.common.base.Strings.isNullOrEmpty;
import java.text.DecimalFormat;
import java.text.MessageFormat;
import java.text.ParseException;
import java.util.Locale;
import java.util.ResourceBundle;
import br.com.caelum.vraptor.Convert;
import br.com.caelum.vraptor.Converter;
import br.com.caelum.vraptor.converter.ConversionError;
import br.com.caelum.vraptor.core.Localization;
import br.com.caelum.vraptor.ioc.RequestScoped;
/**
* Localized version of VRaptor's Float converter. This component is optional and must be declared in web.xml before
* using. If the input value if empty or a null string, null values are returned. If the input string is not a number a
* {@link ConversionError} will be throw.
*
* @author Otávio Scherer Garcia
* @since 3.1.2
*/
@Convert(Float.class)
@RequestScoped
public class LocaleBasedFloatConverter
implements Converter<Float> {
private final Localization localization;
public LocaleBasedFloatConverter(Localization localization) {
this.localization = localization;
}
public Float convert(String value, Class<? extends Float> type, ResourceBundle bundle) {
if (isNullOrEmpty(value)) {
return null;
}
try {
final Locale locale = localization.getLocale();
DecimalFormat fmt = ((DecimalFormat) DecimalFormat.getInstance(locale));
return fmt.parse(value).floatValue();
} catch (ParseException e) {
throw new ConversionError(MessageFormat.format(bundle.getString("is_not_a_valid_number"), value));
}
}
}