/**
* Copyright 2011 the original author or authors.
*
* 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.springframework.data.neo4j.fieldaccess;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.core.convert.ConversionService;
import org.springframework.core.convert.converter.Converter;
import org.springframework.core.convert.converter.ConverterFactory;
import org.springframework.core.convert.support.ConversionServiceFactory;
import org.springframework.core.convert.support.GenericConversionService;
import java.util.Date;
public class Neo4jConversionServiceFactoryBean implements FactoryBean<ConversionService>
{
@Override
public ConversionService getObject() throws Exception
{
GenericConversionService conversionService = new GenericConversionService();
addConverters(conversionService);
ConversionServiceFactory.addDefaultConverters( conversionService );
return conversionService;
}
private void addConverters( GenericConversionService conversionService )
{
conversionService.addConverter(new DateToLongConverter());
conversionService.addConverter(new LongToDateConverter());
conversionService.addConverter(new EnumToStringConverter());
conversionService.addConverterFactory(new StringToEnumConverterFactory());
}
@Override
public Class<?> getObjectType()
{
return GenericConversionService.class;
}
@Override
public boolean isSingleton()
{
return true;
}
public static class DateToLongConverter implements Converter<Date, String> {
@Override
public String convert( Date source )
{
return String.valueOf(source.getTime());
}
}
public static class LongToDateConverter implements Converter<String, Date> {
@Override
public Date convert( String source )
{
return new Date(Long.valueOf(source));
}
}
public static class EnumToStringConverter implements Converter<Enum, String> {
@Override
public String convert( Enum source )
{
return source.name();
}
}
public static class StringToEnumConverterFactory implements ConverterFactory<String, Enum> {
public <T extends Enum> Converter<String, T> getConverter(Class<T> targetType) {
return new StringToEnum(targetType);
}
private static class StringToEnum<T extends Enum> implements Converter<String, T> {
private final Class<T> enumType;
public StringToEnum(Class<T> enumType) {
this.enumType = enumType;
}
public T convert(String source) {
if (source == null) return null;
final String trimmed=source.trim();
if (trimmed.isEmpty()) return null;
return Enum.valueOf(this.enumType, trimmed);
}
}
}
}