package org.jtheque.core.utils.ui.constraints;

 import org.jtheque.core.managers.Managers;

 import org.jtheque.core.managers.error.InternationalizedError;

 import org.jtheque.core.managers.error.JThequeError;

 import org.jtheque.core.managers.language.ILanguageManager;

 import java.util.Collection;

 /*

  * 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/>.

  */

 /**

  * A constraint to indicate that the field cannot be null.

  *

  * @author Baptiste Wicht

  */

 public final class NotNullConstraint implements Constraint {

     private final String fieldName;

     /**

      * Construct a new NotNullConstraint.

      *

      * @param fieldName The field name.

      */

     public NotNullConstraint(String fieldName) {

         super();

         this.fieldName = fieldName;

     }

     @Override

     public int maxLength() {

         return -1;

     }

     @Override

     public boolean mustBeNumerical() {

         return false;

     }

     @Override

     public boolean canBeNullOrEmpty() {

         return false;

     }

     @Override

     public boolean mustControlLength() {

         return false;

     }

     @Override

     public void validate(Object field, Collection<JThequeError> errors) {

         if (field == null) {

             errors.add(new InternationalizedError("error.validation.field.empty", new Object[]{Managers.getManager(ILanguageManager.class).getMessage(fieldName)}));

         }

     }

 }