/*
 * This is eMonocot, a global online biodiversity information resource.
 *
 * Copyright © 2011–2015 The Board of Trustees of the Royal Botanic Gardens, Kew and The University of Oxford
 *
 * eMonocot is free software: you can redistribute it and/or modify it under the terms of the
 * GNU Affero General Public License as published by the Free Software Foundation, either version 3
 * of the License, or (at your option) any later version.
 *
 * eMonocot 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 Affero General Public License for more details.
 *
 * The complete text of the GNU Affero General Public License is in the source repository as the file
 * ‘COPYING’.  It is also available from <http://www.gnu.org/licenses/>.
 */
package org.emonocot.portal.validation;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;

import org.apache.commons.beanutils.PropertyUtils;

public class FieldMatchValidator implements ConstraintValidator<FieldMatch, Object> {

	private String firstFieldName;
	private String secondFieldName;

	@Override
	public void initialize(FieldMatch constraintAnnotation) {
		firstFieldName = constraintAnnotation.first();
		secondFieldName = constraintAnnotation.second();
	}

	@Override
	public boolean isValid(Object value, ConstraintValidatorContext context) {
		try {
			final Object firstObj = PropertyUtils.getProperty(value, firstFieldName);
			final Object secondObj = PropertyUtils.getProperty(value, secondFieldName);

			return firstObj == null && secondObj == null || firstObj != null && firstObj.equals(secondObj);
		} catch (final Exception ignore) {
			// ignore
		}
		return true;
	}

}