package org.jtheque.core.managers.persistence;

 /*

  * This file is part of JTheque.

  *

  * JTheque is free software: you can redistribute it and/or modify

  * it under the terms of the GNU General Public License as published by

  * the Free Software Foundation, either version 3 of the License.

  *

  * JTheque 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 General Public License for more details.

  *

  * You should have received a copy of the GNU General Public License

  * along with JTheque.  If not, see <http://www.gnu.org/licenses/>.

  */

 import org.jtheque.core.managers.persistence.able.Entity;

 import org.jtheque.core.managers.persistence.context.TemporaryContext;

 /**

  * Represents a persisted object of JTheque.

  *

  * @author Baptiste Wicht

  */

 public abstract class AbstractEntity implements Entity {

     private int id;

     private final TemporaryContext temporaryContext;

     protected static final int HASHCODE_PRIME = 31;

     /**

      * Construct a new Entity.

      */

     public AbstractEntity() {

         super();

         temporaryContext = new TemporaryContext();

     }

     @Override

     public TemporaryContext getTemporaryContext() {

         return temporaryContext;

     }

     @Override

     public final int getId() {

         return id;

     }

     @Override

     public final void setId(int id) {

         this.id = id;

     }

     @Override

     public final int compareTo(Entity object) {

         return getDisplayableText().compareTo(object.getDisplayableText());

     }

     @Override

     public abstract boolean equals(Object object);

     @Override

     public abstract int hashCode();

     @Override

     public final boolean isSaved() {

         return id != 0;

     }

     @Override

     public void saveToMemento() {

         throw new UnsupportedOperationException();

     }

     @Override

     public void restoreMemento() {

         throw new UnsupportedOperationException();

     }

 }