OnmsEntity.java

/*******************************************************************************
 * This file is part of OpenNMS(R).
 *
 * Copyright (C) 2006-2011 The OpenNMS Group, Inc.
 * OpenNMS(R) is Copyright (C) 1999-2011 The OpenNMS Group, Inc.
 *
 * OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
 *
 * OpenNMS(R) 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.
 *
 * OpenNMS(R) 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 OpenNMS(R).  If not, see:
 *      http://www.gnu.org/licenses/
 *
 * For more information contact:
 *     OpenNMS(R) Licensing <license@opennms.org>
 *     http://www.opennms.org/
 *     http://www.opennms.com/
 *******************************************************************************/

package org.opennms.netmgt.model;

/**
 * <p>Abstract OnmsEntity class.</p>
 */
public abstract class OnmsEntity {
	
	/**
	 * <p>hasNewValue</p>
	 *
	 * @param newVal a {@link java.lang.Object} object.
	 * @param existingVal a {@link java.lang.Object} object.
	 * @return a boolean.
	 */
	protected static boolean hasNewValue(Object newVal, Object existingVal) {
        return newVal != null && !newVal.equals(existingVal);
    }

    /**
     * <p>visit</p>
     *
     * @param visitor a {@link org.opennms.netmgt.model.EntityVisitor} object.
     */
    public abstract void visit(EntityVisitor visitor);

}