EntityCollectionUtil.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.jpa.entity;
 
import java.util.Collection;
import java.util.Iterator;
import java.util.Objects;
 
public class EntityCollectionUtil {
 
  public static boolean remove(Collection c, IDaoEntity o) {
    Iterator it = c.iterator();
    while(it.hasNext()) {
      Object entity = it.next();
      if((entity instanceof IDaoEntity) && Objects.equals(((IDaoEntity) entity).entityId(), o.entityId())) {
        it.remove();
        return true;
      }
    }
    return false;
  }
 
  public static boolean contains(Collection c, IDaoEntity o) {
    Iterator it = c.iterator();
    while(it.hasNext()) {
      Object entity = it.next();
      if((entity instanceof IDaoEntity) && Objects.equals(((IDaoEntity) entity).entityId(), o.entityId())) {
        return true;
      }
    }
    return false;
  }
 
  public static boolean replace(Collection c, IDaoEntity o) {
    if(remove(c, o)) {
      return c.add(o);
    }
    return false;
  }
 
  public static void removeEmpties(Collection c) {
    Iterator it = c.iterator();
    while(it.hasNext()) {
      Object obj = it.next();
      if((obj instanceof IDaoEntity) && ((IDaoEntity) obj).isEmpty()) {
        it.remove();
      }      
    }
  }
 
  public static void removeNews(Collection c) {
    Iterator it = c.iterator();
    while(it.hasNext()) {
      Object obj = it.next();
      if((obj instanceof IDaoEntity) && ((IDaoEntity) obj).isNew()) {
        it.remove();
      }      
    }
  }
 
  public static void iterate(Collection c, IFilter filter) {
    Iterator it = c.iterator();
    while(it.hasNext()) {
      Object o = it.next();
      if(filter.match(o)) {
        filter.perform(it, o);
      }
    }
  }
 
  private EntityCollectionUtil() {
  }
 
}