Hibernate example source code file (Child2Entity.java)

This example Hibernate source code file (Child2Entity.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, audited, child2entity, child2entity, generatedvalue, id, integer, integer, joincolumn, joincolumn, list, override, string, string, util

The Hibernate Child2Entity.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 Child2Entity {
    @Id
    @GeneratedValue
    private Integer id;

    private String child2Data;

    public Child2Entity() {
    }

    public Child2Entity(String child2Data) {
        this.child2Data = child2Data;
    }

    public Child2Entity(Integer id, String child2Data) {
        this.id = id;
        this.child2Data = child2Data;
    }

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

    public Integer getId() {
        return id;
    }

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

    public String getChild2Data() {
        return child2Data;
    }

    public void setChild2Data(String child2Data) {
        this.child2Data = child2Data;
    }

    public List<ParentEntity> getParents() {
        return parents;
    }

    public void setParents(List<ParentEntity> parents) {
        this.parents = parents;
    }

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

        Child2Entity that = (Child2Entity) o;

        if (child2Data != null ? !child2Data.equals(that.child2Data) : that.child2Data != null) return false;
        //noinspection RedundantIfStatement
        if (id != null ? !id.equals(that.id) : that.id != null) return false;

        return true;
    }

    @Override
    public int hashCode() {
        int result = id != null ? id.hashCode() : 0;
        result = 31 * result + (child2Data != null ? child2Data.hashCode() : 0);
        return result;
    }

    public String toString() {
        return "C2E(id = " + id + ", child2Data = " + child2Data + ")";
    }
}