/**
 * This file Copyright (c) 2011-2014 Magnolia International
 * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
 *
 *
 * This file is dual-licensed under both the Magnolia
 * Network Agreement and the GNU General Public License.
 * You may elect to use one or the other of these licenses.
 *
 * This file is distributed in the hope that it will be
 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
 * Redistribution, except as permitted by whichever of the GPL
 * or MNA you select, is prohibited.
 *
 * 1. For the GPL license (GPL), you can redistribute and/or
 * modify this file under the terms of the GNU General
 * Public License, Version 3, as published by the Free Software
 * Foundation.  You should have received a copy of the GNU
 * General Public License, Version 3 along with this program;
 * if not, write to the Free Software Foundation, Inc., 51
 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * 2. For the Magnolia Network Agreement (MNA), this file
 * and the accompanying materials are made available under the
 * terms of the MNA which accompanies this distribution, and
 * is available at http://www.magnolia-cms.com/mna.html
 *
 * Any modifications to this file must keep this entire header
 * intact.
 *
 */
package info.mangolia.support.ui.form.field.comparator;

import com.vaadin.data.Property;
import com.vaadin.ui.Field;

/**
 * Checks if: All fields can be empty, but if one field has a value, all need a value.
 */
public class AllEmptyOrNoneEmpty implements CrossFieldsComparator {

    @Override
    public boolean passCrossComparison(Field... fields) {

        boolean oneHasValue = false;
        boolean oneHasNoValue = false;
        for (Field<?> field : fields) {
            if (field.getValue() == null) {
                oneHasNoValue = true;
            } else {
                oneHasValue = true;
            }
            Property propertyDataSource = field.getPropertyDataSource();
            String id = field.getId();
            Class type = propertyDataSource.getType();
            System.out.println("field.getId()" + id);
        }

        return !(oneHasNoValue && oneHasValue);
    }



}