DocumentRelation.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2011 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.turro.financials.entity;
 
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
import org.turro.jpa.entity.IDaoEntity;
 
@Entity
public class DocumentRelation implements java.io.Serializable, IDaoEntity {
 
  @Id
  @GeneratedValue(strategy=GenerationType.IDENTITY)
  @Column(name="IDENTIFIER")
  private long id;
 
  @ManyToOne
  private Document ancestor;
 
  @ManyToOne
  private Document descendant;
 
  public Document getAncestor() {
    return ancestor;
  }
 
  public void setAncestor(Document ancestor) {
    this.ancestor = ancestor;
  }
 
  public Document getDescendant() {
    return descendant;
  }
 
  public void setDescendant(Document descendant) {
    this.descendant = descendant;
  }
 
  public long getId() {
    return id;
  }
 
  public void setId(long id) {
    this.id = id;
  }
 
  /* IDaoEntity */
 
  @Override
  public Object entityId() {
    return id;
  }
 
  @Override
  public boolean isEmpty() {
    return ancestor == null ||
            descendant == null ||
            (descendant != null && descendant.isEmpty());
  }
}