IDaoEntity.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2021 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.jpa.entity;
 
import java.util.Collection;
import java.util.Collections;
 
public interface IDaoEntity {
  
  public Object entityId();
  public boolean isEmpty();
  
  default boolean isNew() {
    return DaoEntity.isNewId(entityId());
  }
  
  default void prepareSave() {
    removeEmpties();
    collections().forEach(c -> {
      c.forEach(sc -> { if(sc instanceof IDaoEntity) { ((IDaoEntity) sc).prepareSave(); } });
    });
  }
  
  default void prepareDelete() {
    removeEmpties();
    collections().forEach(c -> {
      c.forEach(sc -> { if(sc instanceof IDaoEntity) { ((IDaoEntity) sc).prepareDelete(); } });
    });
  }
  
  default void removeEmpties() {
    collections().forEach(c -> {
      EntityCollections.entities(c).removeEmpties();
      c.forEach(sc -> { if(sc instanceof IDaoEntity) { ((IDaoEntity) sc).removeEmpties(); } });
    });
  }
  
  default Collection<Collection> collections() {
    return Collections.EMPTY_LIST;
  }
  
}