Hibernate example source code file (ParentEntity.java)

This example Hibernate source code file (ParentEntity.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Hibernate tags/keywords

arraylist, integer, joincolumn, joincolumn, jointable, list, list, manytomany, override, parententity, parententity, string, string, util, wherejointable

The Hibernate ParentEntity.java source code

package org.hibernate.envers.test.entities.manytomany.sametable;
import java.util.ArrayList;
import java.util.List;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import org.hibernate.annotations.WhereJoinTable;
import org.hibernate.envers.Audited;

/**
 * @author Adam Warski (adam at warski dot org)
 */
@Entity
@Audited
public class ParentEntity {
    @Id
    @GeneratedValue
    private Integer id;

    private String parentData;

    public ParentEntity() {
    }

    public ParentEntity(String parentData) {
        this.parentData = parentData;
    }

    public ParentEntity(Integer id, String parentData) {
        this.id = id;
        this.parentData = parentData;
    }

    @ManyToMany(fetch = FetchType.LAZY)
	@JoinTable(
		name = "children",
		joinColumns = @JoinColumn(name = "parent_id"),
		inverseJoinColumns = @JoinColumn(name = "child1_id", insertable = false, updatable = false)
	)
	@WhereJoinTable(clause = "child1_id is not null")
	private List<Child1Entity> children1 = new ArrayList();

    @ManyToMany(fetch = FetchType.LAZY)
	@JoinTable(
		name = "children",
		joinColumns = @JoinColumn(name = "parent_id"),
		inverseJoinColumns = @JoinColumn(name = "child2_id", insertable = false, updatable = false)
	)
	@WhereJoinTable(clause = "child2_id is not null")
	private List<Child2Entity> children2 = new ArrayList();

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getParentData() {
        return parentData;
    }

    public void setParentData(String parentData) {
        this.parentData = parentData;
    }

    public List<Child1Entity> getChildren1() {
        return children1;
    }

    public void setChildren1(List<Child1Entity> children1) {
        this.children1 = children1;
    }

    public List<Child2Entity> getChildren2() {
        return children2;
    }

    public void setChildren2(List<Child2Entity> children2) {
        this.children2 = children2;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        ParentEntity that = (ParentEntity) o;

        if (id != null ? !id.equals(that.id) : that.id != null) return false;
        //noinspection RedundantIfStatement
        if (parentData != null ? !parentData.equals(that.parentData) : that.parentData != null) return false;

        return true;
    }

    @Override
    public int hashCode() {
        int result = id != null ? id.hashCode() : 0;
        result = 31 * result + (parentData != null ? parentData.hashCode() : 0);
        return result;
    }

    public String toString() {
        return "PE(id = " + id + ", parentData = " + parentData + ")";
    }
}