/**
 * AnalyzerBeans
 * Copyright (C) 2014 Neopost - Customer Information Management
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * 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 Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.eobjects.analyzer.beans.filter;

import org.eobjects.analyzer.beans.api.Categorized;
import org.eobjects.analyzer.beans.api.Configured;
import org.eobjects.analyzer.beans.api.Description;
import org.eobjects.analyzer.beans.api.Filter;
import org.eobjects.analyzer.beans.api.FilterBean;
import org.eobjects.analyzer.beans.categories.FilterCategory;
import org.eobjects.analyzer.data.InputColumn;
import org.eobjects.analyzer.data.InputRow;
import org.eobjects.analyzer.util.CharIterator;

@FilterBean("Single word")
@Description("Filters single word values from multiple word values.")
@Categorized(FilterCategory.class)
public class SingleWordFilter implements Filter<ValidationCategory> {

	@Configured
	InputColumn<String> input;

	@Override
	public ValidationCategory categorize(InputRow inputRow) {
		String value = inputRow.getValue(input);
		return filter(value);
	}

	protected ValidationCategory filter(String value) {
		if (value == null || value.length() == 0) {
			return ValidationCategory.INVALID;
		}
		CharIterator it = new CharIterator(value);
		while (it.hasNext()) {
			it.next();
			if (!it.isLetter()) {
				return ValidationCategory.INVALID;
			}
		}
		return ValidationCategory.VALID;
	}

}