JPA (Jakarta Persistence API) is a Jakarta EE application programming interface specification that describes the management of relational data in enterprise Java applications.

Persistence in this context covers three areas:

The API itself is defined in java. persistence package

The Jakarta Persistence Query Language (JPQL; formerly Java Persistence Query Language)

The JPA specification PersistenceUnitInfo interface encapsulates everything is needed for bootstrapping an EntityManagerFactory. Typically, this interface is implemented by the JPA provider to store the info retrieved after parsing the persistence.xml configuration file.

Because we will no longer use a persistence.xml configuration file, we have to implement this interface ourselves. For this test, consider the following implementation:

    public static final String JPA_VERSION = "2.1";

    private final String persistenceUnitName;

    private PersistenceUnitTransactionType transactionType =

        PersistenceUnitTransactionType.RESOURCE_LOCAL;

    private final List<String> managedClassNames;

    private final List<String> mappingFileNames = new ArrayList<>();

            List<String> managedClassNames,

        this.persistenceUnitName = persistenceUnitName;

        this.managedClassNames = managedClassNames;

    public String getPersistenceUnitName() {

    public String getPersistenceProviderClassName() {

        return HibernatePersistenceProvider.class.getName();

    public PersistenceUnitTransactionType getTransactionType() {

    public DataSource getJtaDataSource() {

    public PersistenceUnitInfoImpl setJtaDataSource(

        this.jtaDataSource = jtaDataSource;

        transactionType = PersistenceUnitTransactionType.JTA;

    public DataSource getNonJtaDataSource() {

    public PersistenceUnitInfoImpl setNonJtaDataSource(

            DataSource nonJtaDataSource) {

        this.nonJtaDataSource = nonJtaDataSource;

        transactionType = PersistenceUnitTransactionType.RESOURCE_LOCAL;

    public List<String> getMappingFileNames() {

    public URL getPersistenceUnitRootUrl() {

    public List<String> getManagedClassNames() {

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