Spring Boot Application - H2 Database (1.4.200) Array column, Hibernate mapping - spring-boot

Question

I'm creating a Spring Boot application, where I have a Routes table. Within the Routes table I have stops column where I want to store the integer array of stop id.
Since H2 database (version 1.4.200) doesn't support typed array, I defined it as generic array.
CREATE TABLE Routes (
id INT AUTO_INCREMENT PRIMARY KEY,
name VARCHAR(250) NOT NULL,
stops ARRAY[100] NOT NULL
);
INSERT INTO Routes (id, name, stops) VALUES (1, '500CK', (1,2));
SELECT * FROM Routes;
ID NAME STOPS
1 500CK [1, 2]
I want to know what should be the type of stops property (any other configuration required) so it works with Hibernate
#Entity
#Table(name = "Routes")
public class Route {
#Id
#GeneratedValue
private int id;
private String name;
// I'm not sure what should be the data type of stops
private Object[] stops;
}
I'm getting below error while trying to get the route from /route endpoint
org.h2.jdbc.JdbcSQLDataException: Hexadecimal string contains non-hex character: "[1, 2]" [90004-200]
I created the Routes table by defining the DDL in the schema.sql file
DROP TABLE IF EXISTS Routes;
CREATE TABLE Routes (
id INT AUTO_INCREMENT PRIMARY KEY,
name VARCHAR(250) NOT NULL,
stops ARRAY[100] NOT NULL
);
And I inserted one record by defining the DML in data.sql file
INSERT INTO ROUTES (id, name, stops) VALUES
(1, '500CK', (1,2));
UPDATE :
I updated h2 to 2.1.212
CREATE TABLE Routes (
id INT AUTO_INCREMENT PRIMARY KEY,
name VARCHAR(250) NOT NULL,
stops INTEGER ARRAY[100] NOT NULL
);
INSERT INTO ROUTES (id, name, stops) VALUES(1, '500CK', ARRAY[1, 2]);
I can see the above record in the Routes table.
Changed the Route entity as below
#Entity
#Table(name = "Routes")
public class Route {
#Id
#GeneratedValue
private int id;
private String name;
private Integer[] stops;
// getter & setters
}
I'm getting below error
org.h2.jdbc.JdbcSQLDataException: Data conversion error converting "ARRAY to BINARY VARYING" [22018-212]
I'm using hibernate-core 5.6.8.Final
Looks like Hibernate is not able to do the conversion.
Can I achieve it with just Hibernate, Or do I have to do it, the way mentioned here
https://vladmihalcea.com/how-to-map-java-and-sql-arrays-with-jpa-and-hibernate/
Update : Trying to update hibernate-core to 6.1.0.Final
I tried to update the hibernate-core to 6.1.0.Final.
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>6.1.0.Final</version>
</dependency>
But I'm getting below error
Field routeRepository in net.mahtabalam.service.RouteService required a bean named 'entityManagerFactory' that could not be found.
The injection point has the following annotations:
- #org.springframework.beans.factory.annotation.Autowired(required=true)
Action:
Consider defining a bean named 'entityManagerFactory' in your configuration.
Looks like this is caused due to dependency version conflicts.
Below is the project pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.7.0</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>net.mahtabalam</groupId>
<artifactId>routes</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>routes</name>
<description>Bus Routes</description>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>2.1.212</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>6.1.0.Final</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

Answer 1

Unfortunately to my knowledge there will be no way to use hibernate 6.1.0.Final with Spring Boot currently. The issue you've noted with entityManagerFactory will be because the hibernate-entitymanager project was moved into hibernate-core in version 6.1.0.Final.
Looking through the plans for Spring Boot, see here, it looks like there is no imminment plan to update the version of hibernate used either as it won't be until M3 of version 3.
Instead your best bet will be to make a custom converter, I am currently trying to tackle the exact same problem and if I find a solution I will share it.