BlankValidator.java

/*
 * @copyright 2013 Philip Warner
 * @license GNU General Public License
 * 
 * This file is part of Book Catalogue.
 *
 * Book Catalogue 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, or
 * (at your option) any later version.
 *
 * Book Catalogue 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 Book Catalogue.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.eleybourn.bookcatalogue.datamanager;

import com.eleybourn.bookcatalogue.R;

/**
 * Validator that requires a blank field
 * 
 * @author Philip Warner
 *
 */
public class BlankValidator implements DataValidator {
	@Override
	public void validate(DataManager data, Datum datum, boolean crossValidating) {
		if (!datum.isVisible()) {
			// No validation required for invisible fields
			return;
		}
		if (crossValidating)
			return;
		try {
			String s = data.getString(datum);
			if (!s.equals("")) {
				s = s.trim();
				if (!s.equals("")) {
					throw new ValidatorException(R.string.vldt_blank_required, new Object[]{datum.getKey()});
				}
				data.putString(datum, s);
			}
			return;
		} catch (Exception e) {
			throw new ValidatorException(R.string.vldt_blank_required, new Object[]{datum.getKey()});
		}
	}
}