Although kind of similar to HHH-7625 I encountered another problem with {{@Entity}} using {{@EmbeddedId}}. Consider the following minimal example:
h2. Parent.java
{code:java}
import java.io.Serializable;
import java.util.List;
import java.util.Objects;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import org.hibernate.envers.Audited;
@Entity
@Audited
public class Parent implements Serializable {
@Id
private String id;
@OneToMany(mappedBy = "id.parent")
private List<Child> children;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public List<Child> getChildren() {
return children;
}
public void setChildren(List<Child> children) {
this.children = children;
}
@Override
public int hashCode() {
int hash = 5;
hash = 97 * hash + Objects.hashCode(this.id);
return hash;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Parent other = (Parent) obj;
return Objects.equals(this.id, other.id);
}
}
{code}
h2. Child.java
{code:java}
import java.io.Serializable;
import java.util.Objects;
import javax.persistence.EmbeddedId;
import javax.persistence.Entity;
@Entity
public class Child implements Serializable {
@EmbeddedId
private ChildId id;
public ChildId getId() {
return id;
}
public void setId(ChildId id) {
this.id = id;
}
@Override
public int hashCode() {
int hash = 7;
hash = 67 * hash + Objects.hashCode(this.id);
return hash;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Child other = (Child) obj;
return Objects.equals(this.id, other.id);
}
}
{code}
h2. ChildId.java
{code:java}
import java.io.Serializable;
import java.util.Objects;
import javax.persistence.Embeddable;
import javax.persistence.JoinColumn;
import javax.persistence.JoinColumns;
import javax.persistence.ManyToOne;
@Embeddable
public class ChildId implements Serializable {
@ManyToOne
@JoinColumns({
@JoinColumn(name = "parent_id", referencedColumnName = "id")
})
private Parent parent;
private Integer number;
public Parent getParent() {
return parent;
}
public void setParent(Parent parent) {
this.parent = parent;
}
public Integer getNumber() {
return number;
}
public void setNumber(Integer number) {
this.number = number;
}
@Override
public int hashCode() {
int hash = 5;
hash = 79 * hash + Objects.hashCode(this.parent);
hash = 79 * hash + Objects.hashCode(this.number);
return hash;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final ChildId other = (ChildId) obj;
if (!Objects.equals(this.parent, other.parent)) {
return false;
}
return Objects.equals(this.number, other.number);
}
}
{code}
which leads to
{quote} {{ Caused by: org.hibernate.MappingException: Unable to read the mapped by attribute for children in Child!
at org.hibernate.envers.configuration.internal.metadata.CollectionMetadataGenerator.getMappedBy(CollectionMetadataGenerator.java:868) }} {quote} |
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