/**
* 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.converter.ConverterRegistry;
import org.springframework.core.convert.support.DefaultConversionService;
import org.springframework.core.convert.support.GenericConversionService;
import org.springframework.data.geo.Point;
import org.springframework.data.geo.Shape;
import org.springframework.data.neo4j.repository.GeoConverter;
import java.util.Arrays;
import java.util.Date;
public class Neo4jConversionServiceFactoryBean implements FactoryBean<ConversionService> {
@Override
public ConversionService getObject() throws Exception {
GenericConversionService conversionService = new GenericConversionService();
addConverters(conversionService);
DefaultConversionService.addDefaultConverters(conversionService);
return conversionService;
}
public void addConverters(ConversionService service) {
if (service instanceof ConverterRegistry) {
ConverterRegistry registry = (ConverterRegistry) service;
registry.addConverter(new DateToStringConverter());
registry.addConverter(new DateToLongConverter());
registry.addConverter(new StringToDateConverter());
registry.addConverter(new NumberToDateConverter());
registry.addConverter(new EnumToStringConverter());
registry.addConverter(new EnumToIntegerConverter());
registry.addConverter(new ShapeToStringConverter());
registry.addConverter(new StringToShapeConverter());
registry.addConverter(new PointToStringConverter());
registry.addConverter(new StringToPointConverter());
registry.addConverterFactory(new StringToEnumConverterFactory());
registry.addConverterFactory(new NumberToEnumConverterFactory());
} else {
throw new IllegalArgumentException("conversionservice is no ConverterRegistry:" + service);
}
}
@Override
public Class<?> getObjectType() {
return GenericConversionService.class;
}
@Override
public boolean isSingleton() {
return true;
}
public static class DateToStringConverter implements Converter<Date, String> {
@Override
public String convert(Date source) {
return String.valueOf(source.getTime());
}
}
public static class DateToLongConverter implements Converter<Date, Long> {
@Override
public Long convert(Date source) {
return source.getTime();
}
}
public static class NumberToDateConverter implements Converter<Number, Date> {
@Override
public Date convert(Number source) {
return new Date(source.longValue());
}
}
public static class StringToDateConverter 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 EnumToIntegerConverter implements Converter<Enum, Integer> {
@Override
public Integer convert(Enum source) {
return source.ordinal();
}
}
public static class ShapeToStringConverter implements Converter<Shape, String> {
@Override
public String convert(Shape source) {
return GeoConverter.toWellKnownText(source);
}
}
public static class PointToStringConverter implements Converter<Point, String> {
@Override
public String convert(Point source) {
return GeoConverter.toWellKnownText(source);
}
}
public static class StringToShapeConverter implements Converter<String, Shape> {
@Override
public Shape convert(String source) {
return GeoConverter.fromWellKnownText(source);
}
}
public static class StringToPointConverter implements Converter<String, Point> {
@Override
public Point convert(String source) {
return GeoConverter.pointFromWellKnownText(source);
}
}
public static class StringToEnumConverterFactory implements ConverterFactory<String, Enum> {
@SuppressWarnings("unchecked")
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;
}
@SuppressWarnings("RedundantCast")
public T convert(String source) {
if (source == null) return null;
final String trimmed = source.trim();
if (trimmed.isEmpty()) return null;
return (T) Enum.valueOf(this.enumType, trimmed);
}
}
}
public static class NumberToEnumConverterFactory implements ConverterFactory<Number, Enum> {
@SuppressWarnings("unchecked")
public <T extends Enum> Converter<Number, T> getConverter(Class<T> targetType) {
return new NumberToEnum(targetType);
}
private static class NumberToEnum<T extends Enum> implements Converter<Number, T> {
private final Class<T> enumType;
public NumberToEnum(Class<T> enumType) {
this.enumType = enumType;
}
@SuppressWarnings("RedundantCast")
public T convert(Number source) {
if (source == null) return null;
T[] values = this.enumType.getEnumConstants();
int ordinal = source.intValue();
if (ordinal < 0 || ordinal >= values.length) throw new IllegalArgumentException("Ordinal value for Enum out of range "+ordinal+" "+ Arrays.toString(values));
return (T)values[ordinal];
}
}
}
}