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TreeTest.java
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TreeTest.java
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package com.vladmihalcea.hibernate.masterclass.laboratory.inheritance;
import com.vladmihalcea.hibernate.masterclass.laboratory.util.AbstractTest;
import org.hibernate.Session;
import org.junit.Test;
import javax.persistence.*;
import java.util.HashSet;
import java.util.Set;
/**
* TreeTest - Tree Test
*
* @author Vlad Mihalcea
*/
public class TreeTest extends AbstractTest {
@Override
protected Class<?>[] entities() {
return new Class<?>[]{
LocalFolder.class,
RemoteFolder.class,
};
}
@Test
public void testTree() {
LOGGER.debug("testAddWebResource");
doInTransaction(session -> {
LocalFolder rootLocalFolder = new LocalFolder();
session.persist(rootLocalFolder);
LocalFolder localFolder1 = new LocalFolder();
rootLocalFolder.addChild(localFolder1);
session.persist(localFolder1);
LocalFolder localFolder11 = new LocalFolder();
localFolder1.addChild(localFolder11);
session.persist(localFolder11);
RemoteFolder rootRemoteFolder = new RemoteFolder();
session.persist(rootRemoteFolder);
RemoteFolder remoteFolder1 = new RemoteFolder();
rootRemoteFolder.addChild(remoteFolder1);
session.persist(remoteFolder1);
RemoteFolder remoteFolder11 = new RemoteFolder();
remoteFolder1.addChild(remoteFolder11);
session.persist(remoteFolder11);
return null;
});
}
@MappedSuperclass
public abstract class GenericHierarchicalDictionary {
public abstract GenericHierarchicalDictionary getParent();
public abstract Set<? extends GenericHierarchicalDictionary> getChildren();
}
@Entity
@Table(name = "LocalFolder")
public class LocalFolder extends GenericHierarchicalDictionary {
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
private Long id;
@ManyToOne
private LocalFolder parent;
@OneToMany(mappedBy = "parent")
private Set<LocalFolder> children = new HashSet<LocalFolder>();
@Override
public LocalFolder getParent() {
return parent;
}
@Override
public Set<LocalFolder> getChildren() {
return children;
}
public void addChild(LocalFolder localFolder) {
localFolder.parent = this;
children.add(localFolder);
}
}
@Entity
@Table(name = "RemoteFolder")
public class RemoteFolder extends GenericHierarchicalDictionary {
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
private Long id;
@ManyToOne
private RemoteFolder parent;
@OneToMany(mappedBy = "parent")
private Set<RemoteFolder> children = new HashSet<RemoteFolder>();
@Override
public RemoteFolder getParent() {
return parent;
}
@Override
public Set<RemoteFolder> getChildren() {
return children;
}
public void addChild(RemoteFolder localFolder) {
localFolder.parent = this;
children.add(localFolder);
}
}
}