ParentEntity.java

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<Child1Entity>();

    @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<Child2Entity>();

    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 + ")";
    }
}