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BAEL-2901 Composite primary keys in JPA (#6994)

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* BAEL-2901 Composite primary keys in JPA

* Formatted code using the recommended formatter.xml
This commit is contained in:
Vivek 2019-05-28 04:47:58 +05:30 committed by Josh Cummings
parent 41eb61026b
commit f4b38eed2a
6 changed files with 515 additions and 167 deletions
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43
persistence-modules/java-jpa/src/main/java/com/baeldung/jpa/entity/Account.java Normal file
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package com.baeldung.jpa.entity;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.IdClass;
@Entity
@IdClass(AccountId.class)
public class Account {
@Id
private String accountNumber;
@Id
private String accountType;
private String description;
public String getAccountNumber() {
return accountNumber;
}
public void setAccountNumber(String accountNumber) {
this.accountNumber = accountNumber;
}
public String getAccountType() {
return accountType;
}
public void setAccountType(String accountType) {
this.accountType = accountType;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}

52
persistence-modules/java-jpa/src/main/java/com/baeldung/jpa/entity/AccountId.java Normal file
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package com.baeldung.jpa.entity;
import java.io.Serializable;
public class AccountId implements Serializable {
private static final long serialVersionUID = 1L;
private String accountNumber;
private String accountType;
public AccountId() {
}
public AccountId(String accountNumber, String accountType) {
this.accountNumber = accountNumber;
this.accountType = accountType;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((accountNumber == null) ? 0 : accountNumber.hashCode());
result = prime * result + ((accountType == null) ? 0 : accountType.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
AccountId other = (AccountId) obj;
if (accountNumber == null) {
if (other.accountNumber != null)
return false;
} else if (!accountNumber.equals(other.accountNumber))
return false;
if (accountType == null) {
if (other.accountType != null)
return false;
} else if (!accountType.equals(other.accountType))
return false;
return true;
}
}

34
persistence-modules/java-jpa/src/main/java/com/baeldung/jpa/entity/Book.java Normal file
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package com.baeldung.jpa.entity;
import javax.persistence.EmbeddedId;
import javax.persistence.Entity;
@Entity
public class Book {
@EmbeddedId
private BookId bookId;
private String description;
public Book() {
}
public Book(BookId bookId) {
this.bookId = bookId;
}
public BookId getBookId() {
return bookId;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}

62
persistence-modules/java-jpa/src/main/java/com/baeldung/jpa/entity/BookId.java Normal file
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package com.baeldung.jpa.entity;
import java.io.Serializable;
import javax.persistence.Embeddable;
@Embeddable
public class BookId implements Serializable {
private static final long serialVersionUID = 1L;
private String title;
private String language;
public BookId() {
}
public BookId(String title, String language) {
this.title = title;
this.language = language;
}
public String getTitle() {
return title;
}
public String getLanguage() {
return language;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((language == null) ? 0 : language.hashCode());
result = prime * result + ((title == null) ? 0 : title.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
BookId other = (BookId) obj;
if (language == null) {
if (other.language != null)
return false;
} else if (!language.equals(other.language))
return false;
if (title == null) {
if (other.title != null)
return false;
} else if (!title.equals(other.title))
return false;
return true;
}
}

375
persistence-modules/java-jpa/src/main/resources/META-INF/persistence.xml
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@ -1,183 +1,226 @@
<?xml version="1.0" encoding="UTF-8"?> <?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence" <persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence
http://xmlns.jcp.org/xml/ns/persistence/persistence_2_2.xsd" http://xmlns.jcp.org/xml/ns/persistence/persistence_2_2.xsd"
version="2.2"> version="2.2">
<persistence-unit name="java-jpa-scheduled-day"> <persistence-unit name="java-jpa-scheduled-day">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider> <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<class>com.baeldung.sqlresultsetmapping.ScheduledDay</class> <class>com.baeldung.sqlresultsetmapping.ScheduledDay</class>
<class>com.baeldung.sqlresultsetmapping.Employee</class> <class>com.baeldung.sqlresultsetmapping.Employee</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes> <exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties> <properties>
<property name="javax.persistence.jdbc.driver" value="org.h2.Driver"/> <property name="javax.persistence.jdbc.driver"
<property name="javax.persistence.jdbc.url" value="org.h2.Driver" />
value="jdbc:h2:mem:test;INIT=RUNSCRIPT FROM 'classpath:database.sql'"/> <property name="javax.persistence.jdbc.url"
<property name="javax.persistence.jdbc.user" value="sa"/> value="jdbc:h2:mem:test;INIT=RUNSCRIPT FROM 'classpath:database.sql'" />
<property name="javax.persistence.jdbc.password" value=""/> <property name="javax.persistence.jdbc.user" value="sa" />
<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect"/> <property name="javax.persistence.jdbc.password" value="" />
<!--<property name="hibernate.hbm2ddl.auto" value="create-drop" />--> <property name="hibernate.dialect"
<property name="show_sql" value="true"/> value="org.hibernate.dialect.H2Dialect" />
<property name="hibernate.temp.use_jdbc_metadata_defaults" value="false"/> <!--<property name="hibernate.hbm2ddl.auto" value="create-drop" /> -->
</properties> <property name="show_sql" value="true" />
</persistence-unit> <property name="hibernate.temp.use_jdbc_metadata_defaults"
value="false" />
</properties>
</persistence-unit>
<persistence-unit name="jpa-h2"> <persistence-unit name="jpa-h2">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider> <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<class>com.baeldung.jpa.stringcast.Message</class> <class>com.baeldung.jpa.stringcast.Message</class>
<class>com.baeldung.jpa.enums.Article</class> <class>com.baeldung.jpa.enums.Article</class>
<class>com.baeldung.jpa.enums.CategoryConverter</class> <class>com.baeldung.jpa.enums.CategoryConverter</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes> <exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties> <properties>
<property name="javax.persistence.jdbc.driver" value="org.h2.Driver"/> <property name="javax.persistence.jdbc.driver"
<property name="javax.persistence.jdbc.url" value="jdbc:h2:mem:test"/> value="org.h2.Driver" />
<property name="javax.persistence.jdbc.user" value="sa"/> <property name="javax.persistence.jdbc.url"
<property name="javax.persistence.jdbc.password" value=""/> value="jdbc:h2:mem:test" />
<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect"/> <property name="javax.persistence.jdbc.user" value="sa" />
<property name="hibernate.hbm2ddl.auto" value="create-drop"/> <property name="javax.persistence.jdbc.password" value="" />
<property name="show_sql" value="true"/> <property name="hibernate.dialect"
<property name="hibernate.temp.use_jdbc_metadata_defaults" value="false"/> value="org.hibernate.dialect.H2Dialect" />
</properties> <property name="hibernate.hbm2ddl.auto" value="create-drop" />
</persistence-unit> <property name="show_sql" value="true" />
<property name="hibernate.temp.use_jdbc_metadata_defaults"
value="false" />
</properties>
</persistence-unit>
<persistence-unit name="jpa-db"> <persistence-unit name="jpa-db">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider> <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<class>com.baeldung.jpa.model.Car</class> <class>com.baeldung.jpa.model.Car</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes> <exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties> <properties>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/> <property name="javax.persistence.jdbc.driver"
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://127.0.0.1:3306/baeldung"/> value="com.mysql.jdbc.Driver" />
<property name="javax.persistence.jdbc.user" value="baeldung"/> <property name="javax.persistence.jdbc.url"
<property name="javax.persistence.jdbc.password" value="YourPassword"/> value="jdbc:mysql://127.0.0.1:3306/baeldung" />
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/> <property name="javax.persistence.jdbc.user"
<property name="hibernate.show_sql" value="true"/> value="baeldung" />
</properties> <property name="javax.persistence.jdbc.password"
</persistence-unit> value="YourPassword" />
<property name="hibernate.dialect"
value="org.hibernate.dialect.MySQLDialect" />
<property name="hibernate.show_sql" value="true" />
</properties>
</persistence-unit>
<persistence-unit name="entity-graph-pu" transaction-type="RESOURCE_LOCAL"> <persistence-unit name="entity-graph-pu"
<class>com.baeldung.jpa.entitygraph.model.Post</class> transaction-type="RESOURCE_LOCAL">
<class>com.baeldung.jpa.entitygraph.model.User</class> <class>com.baeldung.jpa.entitygraph.model.Post</class>
<class>com.baeldung.jpa.entitygraph.model.Comment</class> <class>com.baeldung.jpa.entitygraph.model.User</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes> <class>com.baeldung.jpa.entitygraph.model.Comment</class>
<properties> <exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties>
<!--H2--> <!--H2 -->
<property name="javax.persistence.jdbc.driver" value="org.h2.Driver"/> <property name="javax.persistence.jdbc.driver"
<property name="javax.persistence.jdbc.url" value="org.h2.Driver" />
value="jdbc:h2:mem:entitygraphdb;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE"/> <property name="javax.persistence.jdbc.url"
value="jdbc:h2:mem:entitygraphdb;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE" />
<property name="javax.persistence.schema-generation.database.action" value="drop-and-create"/> <property
<property name="javax.persistence.sql-load-script-source" value="data-init.sql"/> name="javax.persistence.schema-generation.database.action"
</properties> value="drop-and-create" />
</persistence-unit> <property name="javax.persistence.sql-load-script-source"
value="data-init.sql" />
</properties>
</persistence-unit>
<persistence-unit name="java8-datetime-postgresql" transaction-type="RESOURCE_LOCAL"> <persistence-unit name="java8-datetime-postgresql"
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider> transaction-type="RESOURCE_LOCAL">
<class>com.baeldung.jpa.datetime.JPA22DateTimeEntity</class> <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<exclude-unlisted-classes>true</exclude-unlisted-classes> <class>com.baeldung.jpa.datetime.JPA22DateTimeEntity</class>
<properties> <exclude-unlisted-classes>true</exclude-unlisted-classes>
<property name="javax.persistence.jdbc.driver" value="org.postgresql.Driver"/> <properties>
<property name="javax.persistence.jdbc.url" value="jdbc:postgresql://localhost:5432/java8-datetime2"/> <property name="javax.persistence.jdbc.driver"
<property name="javax.persistence.jdbc.user" value="postgres"/> value="org.postgresql.Driver" />
<property name="javax.persistence.jdbc.password" value="postgres"/> <property name="javax.persistence.jdbc.url"
<property name="javax.persistence.schema-generation.database.action" value="drop-and-create"/> value="jdbc:postgresql://localhost:5432/java8-datetime2" />
<property name="javax.persistence.jdbc.user"
value="postgres" />
<property name="javax.persistence.jdbc.password"
value="postgres" />
<property
name="javax.persistence.schema-generation.database.action"
value="drop-and-create" />
<!-- configure logging --> <!-- configure logging -->
<property name="eclipselink.logging.level" value="INFO"/> <property name="eclipselink.logging.level" value="INFO" />
<property name="eclipselink.logging.level.sql" value="FINE"/> <property name="eclipselink.logging.level.sql" value="FINE" />
<property name="eclipselink.logging.parameters" value="true"/> <property name="eclipselink.logging.parameters" value="true" />
</properties> </properties>
</persistence-unit> </persistence-unit>
<persistence-unit name="jpa-h2-criteria"> <persistence-unit name="jpa-h2-criteria">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider> <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<class>com.baeldung.jpa.criteria.entity.Item</class> <class>com.baeldung.jpa.criteria.entity.Item</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes> <exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties> <properties>
<property name="javax.persistence.jdbc.driver" <property name="javax.persistence.jdbc.driver"
value="org.h2.Driver" /> value="org.h2.Driver" />
<property name="javax.persistence.jdbc.url" <property name="javax.persistence.jdbc.url"
value="jdbc:h2:mem:test" /> value="jdbc:h2:mem:test" />
<property name="javax.persistence.jdbc.user" value="sa" /> <property name="javax.persistence.jdbc.user" value="sa" />
<property name="javax.persistence.jdbc.password" value="" /> <property name="javax.persistence.jdbc.password" value="" />
<property name="hibernate.dialect" <property name="hibernate.dialect"
value="org.hibernate.dialect.H2Dialect" /> value="org.hibernate.dialect.H2Dialect" />
<property name="hibernate.hbm2ddl.auto" value="create-drop" /> <property name="hibernate.hbm2ddl.auto" value="create-drop" />
<property name="show_sql" value="true" /> <property name="show_sql" value="true" />
<property name="hibernate.temp.use_jdbc_metadata_defaults" <property name="hibernate.temp.use_jdbc_metadata_defaults"
value="false" /> value="false" />
<property name="javax.persistence.sql-load-script-source" value="item.sql"/> <property name="javax.persistence.sql-load-script-source"
</properties> value="item.sql" />
</persistence-unit> </properties>
</persistence-unit>
<persistence-unit name="jpa-query-types"> <persistence-unit name="jpa-query-types">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider> <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<class>com.baeldung.jpa.querytypes.UserEntity</class> <class>com.baeldung.jpa.querytypes.UserEntity</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes> <exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties> <properties>
<property name="javax.persistence.jdbc.driver" <property name="javax.persistence.jdbc.driver"
value="org.h2.Driver" /> value="org.h2.Driver" />
<property name="javax.persistence.jdbc.url" <property name="javax.persistence.jdbc.url"
value="jdbc:h2:mem:test" /> value="jdbc:h2:mem:test" />
<property name="javax.persistence.jdbc.user" value="sa" /> <property name="javax.persistence.jdbc.user" value="sa" />
<property name="javax.persistence.jdbc.password" value="" /> <property name="javax.persistence.jdbc.password" value="" />
<property name="hibernate.dialect" <property name="hibernate.dialect"
value="org.hibernate.dialect.H2Dialect" /> value="org.hibernate.dialect.H2Dialect" />
<property name="hibernate.hbm2ddl.auto" value="create-drop" /> <property name="hibernate.hbm2ddl.auto" value="create-drop" />
<property name="show_sql" value="true" /> <property name="show_sql" value="true" />
<property name="hibernate.temp.use_jdbc_metadata_defaults" <property name="hibernate.temp.use_jdbc_metadata_defaults"
value="false" /> value="false" />
<property name="javax.persistence.sql-load-script-source" value="users.sql"/> <property name="javax.persistence.sql-load-script-source"
</properties> value="users.sql" />
</persistence-unit> </properties>
</persistence-unit>
<persistence-unit name="entity-default-values"> <persistence-unit name="entity-default-values">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider> <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<class>com.baeldung.jpa.defaultvalues.User</class> <class>com.baeldung.jpa.defaultvalues.User</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes> <exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties> <properties>
<property name="javax.persistence.jdbc.driver" value="org.h2.Driver" /> <property name="javax.persistence.jdbc.driver"
<property name="javax.persistence.jdbc.url" value="jdbc:h2:mem:test" /> value="org.h2.Driver" />
<property name="javax.persistence.jdbc.user" value="sa" /> <property name="javax.persistence.jdbc.url"
<property name="javax.persistence.jdbc.password" value="" /> value="jdbc:h2:mem:test" />
<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect" /> <property name="javax.persistence.jdbc.user" value="sa" />
<property name="hibernate.hbm2ddl.auto" value="create-drop" /> <property name="javax.persistence.jdbc.password" value="" />
<property name="show_sql" value="true" /> <property name="hibernate.dialect"
<property name="hibernate.temp.use_jdbc_metadata_defaults" value="false" /> value="org.hibernate.dialect.H2Dialect" />
</properties> <property name="hibernate.hbm2ddl.auto" value="create-drop" />
</persistence-unit> <property name="show_sql" value="true" />
<property name="hibernate.temp.use_jdbc_metadata_defaults"
value="false" />
</properties>
</persistence-unit>
<persistence-unit name="jpa-entity-definition"> <persistence-unit name="jpa-entity-definition">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider> <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<class>com.baeldung.jpa.entity.Student</class> <class>com.baeldung.jpa.entity.Student</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes> <class>com.baeldung.jpa.entity.Book</class>
<properties> <class>com.baeldung.jpa.entity.BookId</class>
<property name="javax.persistence.jdbc.driver" value="org.h2.Driver" /> <class>com.baeldung.jpa.entity.Account</class>
<property name="javax.persistence.jdbc.url" value="jdbc:h2:mem:test" /> <class>com.baeldung.jpa.entity.AccountId</class>
<property name="javax.persistence.jdbc.user" value="sa" /> <exclude-unlisted-classes>true</exclude-unlisted-classes>
<property name="javax.persistence.jdbc.password" value="" /> <properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect" /> <property name="javax.persistence.jdbc.driver"
<property name="hibernate.hbm2ddl.auto" value="create-drop" /> value="org.h2.Driver" />
<property name="show_sql" value="true" /> <property name="javax.persistence.jdbc.url"
<property name="hibernate.temp.use_jdbc_metadata_defaults" value="false" /> value="jdbc:h2:mem:test" />
</properties> <property name="javax.persistence.jdbc.user" value="sa" />
</persistence-unit> <property name="javax.persistence.jdbc.password" value="" />
<property name="hibernate.dialect"
value="org.hibernate.dialect.H2Dialect" />
<property name="hibernate.hbm2ddl.auto" value="create-drop" />
<property name="show_sql" value="true" />
<property name="hibernate.temp.use_jdbc_metadata_defaults"
value="false" />
</properties>
</persistence-unit>
<persistence-unit name="jpa-projections"> <persistence-unit name="jpa-projections">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider> <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<class>com.baeldung.jpa.projections.Product</class> <class>com.baeldung.jpa.projections.Product</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes> <exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties> <properties>
<property name="javax.persistence.jdbc.driver" value="org.h2.Driver"/> <property name="javax.persistence.jdbc.driver"
<property name="javax.persistence.jdbc.url" value="jdbc:h2:mem:test"/> value="org.h2.Driver" />
<property name="javax.persistence.jdbc.user" value="sa"/> <property name="javax.persistence.jdbc.url"
<property name="javax.persistence.jdbc.password" value=""/> value="jdbc:h2:mem:test" />
<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect"/> <property name="javax.persistence.jdbc.user" value="sa" />
<property name="hibernate.hbm2ddl.auto" value="create-drop"/> <property name="javax.persistence.jdbc.password" value="" />
<property name="show_sql" value="true"/> <property name="hibernate.dialect"
<property name="hibernate.temp.use_jdbc_metadata_defaults" value="false"/> value="org.hibernate.dialect.H2Dialect" />
<property name="javax.persistence.sql-load-script-source" value="products_jpa.sql"/> <property name="hibernate.hbm2ddl.auto" value="create-drop" />
</properties> <property name="show_sql" value="true" />
</persistence-unit> <property name="hibernate.temp.use_jdbc_metadata_defaults"
value="false" />
<property name="javax.persistence.sql-load-script-source"
value="products_jpa.sql" />
</properties>
</persistence-unit>
</persistence> </persistence>

114
persistence-modules/java-jpa/src/test/java/com/baeldung/jpa/entity/CompositeKeysIntegrationTest.java Normal file
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package com.baeldung.jpa.entity;
import static org.junit.Assert.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertEquals;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
public class CompositeKeysIntegrationTest {
private static final String SAVINGS_ACCOUNT = "Savings";
private static final String ACCOUNT_NUMBER = "JXSDF324234";
private static final String ENGLISH = "English";
private static final String WAR_AND_PEACE = "War and Peace";
private static EntityManagerFactory emf;
private static EntityManager em;
@BeforeClass
public static void setup() {
emf = Persistence.createEntityManagerFactory("jpa-entity-definition");
em = emf.createEntityManager();
}
@Test
public void persistBookWithCompositeKeyThenRetrieveDetails() {
Book warAndPeace = createBook();
persist(warAndPeace);
clearThePersistenceContext();
Book book = findBookByBookId();
verifyAssertionsWith(book);
}
@Test
public void persistAccountWithCompositeKeyThenRetrieveDetails() {
Account savingsAccount = createAccount();
persist(savingsAccount);
clearThePersistenceContext();
Account account = findAccountByAccountId();
verifyAssertionsWith(account);
}
@AfterClass
public static void destroy() {
if (em != null) {
em.close();
}
if (emf != null) {
emf.close();
}
}
private Account createAccount() {
Account savingsAccount = new Account();
savingsAccount.setAccountNumber(ACCOUNT_NUMBER);
savingsAccount.setAccountType(SAVINGS_ACCOUNT);
savingsAccount.setDescription("Savings account");
return savingsAccount;
}
private void verifyAssertionsWith(Account account) {
assertEquals(ACCOUNT_NUMBER, account.getAccountNumber());
assertEquals(SAVINGS_ACCOUNT, account.getAccountType());
}
private Account findAccountByAccountId() {
return em.find(Account.class, new AccountId(ACCOUNT_NUMBER, SAVINGS_ACCOUNT));
}
private void persist(Account account) {
em.getTransaction()
.begin();
em.persist(account);
em.getTransaction()
.commit();
}
private Book findBookByBookId() {
return em.find(Book.class, new BookId(WAR_AND_PEACE, ENGLISH));
}
private Book createBook() {
BookId bookId = new BookId(WAR_AND_PEACE, ENGLISH);
Book warAndPeace = new Book(bookId);
warAndPeace.setDescription("Novel and Historical Fiction");
return warAndPeace;
}
private void verifyAssertionsWith(Book book) {
assertNotNull(book);
assertNotNull(book.getBookId());
assertEquals(WAR_AND_PEACE, book.getBookId()
.getTitle());
assertEquals(ENGLISH, book.getBookId()
.getLanguage());
}
private void persist(Book book) {
em.getTransaction()
.begin();
em.persist(book);
em.getTransaction()
.commit();
}
private void clearThePersistenceContext() {
em.clear();
}
}