org.startupframework.data.entity.IntegerEnumJpaConverter Maven / Gradle / Ivy
/*
* Copyright 2019-2020 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
*
* https://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.startupframework.data.entity;
import java.util.Optional;
import java.util.function.Predicate;
import java.util.stream.Stream;
import javax.persistence.AttributeConverter;
import javax.persistence.Converter;
/**
*
* @author Arq. Jesús Israel Anaya Salazar
*/
@Converter
public class IntegerEnumJpaConverter & IntegerEnum> implements AttributeConverter {
private final Class clazz;
protected IntegerEnumJpaConverter(Class clazz) {
this.clazz = clazz;
}
@Override
public Integer convertToDatabaseColumn(E enumItem) {
if (enumItem == null) {
return null;
}
return enumItem.getValue();
}
@Override
public E convertToEntityAttribute(Integer value) {
if (value == null) {
return null;
}
E[] enums = clazz.getEnumConstants();
Predicate predicate = t -> t.getValue() == value;
Stream stream = Stream.of(enums);
Optional item = stream.filter(predicate).findAny();
String msg = String.format("%s is ilegan value for type %s", value.toString(), clazz.toString());
return item.orElseThrow(() -> new IllegalArgumentException(msg));
}
}