org.wisdom.i18n.LocaleParameterConverter Maven / Gradle / Ivy
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* #%L
* Wisdom-Framework
* %%
* Copyright (C) 2013 - 2015 Wisdom Framework
* %%
* 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.
* #L%
*/
package org.wisdom.i18n;
import com.google.common.base.Strings;
import org.wisdom.api.annotations.Service;
import org.wisdom.api.content.ParameterConverter;
import org.wisdom.api.i18n.InternationalizationService;
import java.util.Locale;
/**
* Register a {@link ParameterConverter} able to convert String to {@link Locale} object.
*/
@Service
public class LocaleParameterConverter implements ParameterConverter {
/**
* Converts the given String to a {@link Locale} object using the {@link Locale#forLanguageTag(String)} method.
*
* @param input the input, can be {@literal null}
* @return the created locale, empty locale ({@code "" "" ""}) if the given input is {@code null} or empty.
* @throws IllegalArgumentException if the instance of T cannot be created from the input.
*/
@Override
public Locale fromString(String input) throws IllegalArgumentException {
if (!Strings.isNullOrEmpty(input)) {
return Locale.forLanguageTag(input.replace("_", "-"));
}
return InternationalizationService.DEFAULT_LOCALE;
}
/**
* Gets the type created by this converter.
*
* @return the {@link Locale} class
*/
@Override
public Class getType() {
return Locale.class;
}
}