Merge pull request #10216 from emyasa/BAEL-4643
BAEL-4643: JPA CascadeType.REMOVE vs orphanRemoval
This commit is contained in:
Jonathan Cook
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package com.baeldung.jpa.removal;
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import javax.persistence.Entity;
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import javax.persistence.GeneratedValue;
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import javax.persistence.GenerationType;
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import javax.persistence.Id;
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import javax.persistence.ManyToOne;
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import java.util.Objects;
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@Entity
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public class LineItem {
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@Id
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@GeneratedValue(strategy = GenerationType.AUTO)
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private Long id;
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private String name;
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@ManyToOne
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private OrderRequest orderRequest;
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public LineItem(String name) {
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this.name = name;
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}
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@Override
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public boolean equals(Object o) {
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if (this == o)
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return true;
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if (o == null || getClass() != o.getClass())
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return false;
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LineItem lineItem = (LineItem) o;
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return Objects.equals(id, lineItem.id);
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}
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@Override
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public int hashCode() {
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return id != null ? id.hashCode() : 0;
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}
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protected LineItem() {
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}
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}
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+43
@@ -0,0 +1,43 @@
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package com.baeldung.jpa.removal;
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import javax.persistence.CascadeType;
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import javax.persistence.Entity;
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import javax.persistence.GeneratedValue;
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import javax.persistence.GenerationType;
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import javax.persistence.Id;
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import javax.persistence.OneToMany;
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import javax.persistence.OneToOne;
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import java.util.List;
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@Entity
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public class OrderRequest {
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@Id
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@GeneratedValue(strategy = GenerationType.AUTO)
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private Long id;
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@OneToOne(cascade = { CascadeType.REMOVE, CascadeType.PERSIST })
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private ShipmentInfo shipmentInfo;
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@OneToMany(orphanRemoval = true, cascade = CascadeType.PERSIST, mappedBy = "orderRequest")
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private List<LineItem> lineItems;
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public OrderRequest(ShipmentInfo shipmentInfo) {
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this.shipmentInfo = shipmentInfo;
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}
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public OrderRequest(List<LineItem> lineItems) {
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this.lineItems = lineItems;
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}
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public void removeLineItem(LineItem lineItem) {
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lineItems.remove(lineItem);
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}
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public void setLineItems(List<LineItem> lineItems) {
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this.lineItems = lineItems;
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}
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protected OrderRequest() {
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}
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}
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+23
@@ -0,0 +1,23 @@
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package com.baeldung.jpa.removal;
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import javax.persistence.Entity;
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import javax.persistence.GeneratedValue;
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import javax.persistence.GenerationType;
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import javax.persistence.Id;
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@Entity
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public class ShipmentInfo {
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@Id
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@GeneratedValue(strategy = GenerationType.AUTO)
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private Long id;
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private String name;
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public ShipmentInfo(String name) {
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this.name = name;
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}
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protected ShipmentInfo() {
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}
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}
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@@ -1,25 +1,43 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence
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http://xmlns.jcp.org/xml/ns/persistence/persistence_2_2.xsd"
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version="2.2">
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<persistence-unit name="jpa-h2-equality">
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<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
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<class>com.baeldung.jpa.equality.EqualByJavaDefault</class>
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<class>com.baeldung.jpa.equality.EqualById</class>
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<class>com.baeldung.jpa.equality.EqualByBusinessKey</class>
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<exclude-unlisted-classes>true</exclude-unlisted-classes>
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<properties>
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<property name="javax.persistence.jdbc.driver" value="org.h2.Driver" />
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<property name="javax.persistence.jdbc.url" value="jdbc:h2:mem:test" />
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<property name="javax.persistence.jdbc.user" value="sa" />
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<property name="javax.persistence.jdbc.password" value="" />
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<property name="javax.persistence.jdbc.driver" value="org.h2.Driver" />
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<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect" />
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<property name="hibernate.hbm2ddl.auto" value="create-drop" />
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<property name="show_sql" value="false" />
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<property name="hibernate.temp.use_jdbc_metadata_defaults" value="false" />
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</properties>
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</persistence-unit>
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version="2.2">
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<persistence-unit name="jpa-h2-equality">
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<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
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<class>com.baeldung.jpa.equality.EqualByJavaDefault</class>
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<class>com.baeldung.jpa.equality.EqualById</class>
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<class>com.baeldung.jpa.equality.EqualByBusinessKey</class>
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<exclude-unlisted-classes>true</exclude-unlisted-classes>
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<properties>
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<property name="javax.persistence.jdbc.driver" value="org.h2.Driver"/>
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<property name="javax.persistence.jdbc.url" value="jdbc:h2:mem:test"/>
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<property name="javax.persistence.jdbc.user" value="sa"/>
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<property name="javax.persistence.jdbc.password" value=""/>
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<property name="javax.persistence.jdbc.driver" value="org.h2.Driver"/>
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<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect"/>
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<property name="hibernate.hbm2ddl.auto" value="create-drop"/>
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<property name="show_sql" value="false"/>
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<property name="hibernate.temp.use_jdbc_metadata_defaults" value="false"/>
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</properties>
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</persistence-unit>
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<persistence-unit name="jpa-h2-removal">
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<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
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<class>com.baeldung.jpa.removal.ShipmentInfo</class>
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<class>com.baeldung.jpa.removal.LineItem</class>
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<class>com.baeldung.jpa.removal.OrderRequest</class>
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<exclude-unlisted-classes>true</exclude-unlisted-classes>
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<properties>
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<property name="javax.persistence.jdbc.driver" value="org.h2.Driver"/>
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<property name="javax.persistence.jdbc.url" value="jdbc:h2:mem:test"/>
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<property name="javax.persistence.jdbc.user" value="sa"/>
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<property name="javax.persistence.jdbc.password" value=""/>
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<property name="javax.persistence.jdbc.driver" value="org.h2.Driver"/>
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<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect"/>
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<property name="hibernate.hbm2ddl.auto" value="create-drop"/>
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<property name="show_sql" value="false"/>
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<property name="hibernate.temp.use_jdbc_metadata_defaults" value="false"/>
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</properties>
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</persistence-unit>
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</persistence>
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