ContactManager.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2022 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.contacts.manager;
 
import java.util.List;
import org.turro.contacts.ElephantContactManager;
import org.turro.contacts.IContactManager;
import org.turro.contacts.db.ContactsPU;
import org.turro.jpa.Dao;
import org.turro.sql.SqlClause;
 
@ElephantContactManager
public class ContactManager implements IContactManager {
 
  @Override
  public void removeMissingFrom(Object dao, String table, String idField) {
    List<String> ids = missing(
            SqlClause.select("distinct " + idField).from(table)
            .dao((Dao) dao).resultList(String.class));
    if(!ids.isEmpty()) {
      SqlClause.delete(table)
              .where().in(idField, ids)
              .dao((Dao) dao)
              .execute();
    }
  }
  
  @Override
  public List<String> missing(List<String> contactIds) {
    SqlClause.select("id").from("Contact")
            .where().in("id", contactIds)
            .dao(getDao())
            .resultList(String.class)
            .forEach(id -> contactIds.remove(id));
    return contactIds;
  }
  
  /* Dao */
  
  private Dao _dao;
  
  private Dao getDao() {
    if(_dao == null) {
      _dao = new ContactsPU();
    }
    return _dao;
  }
  
}