org.primefaces.extensions.util.TimelineEventComparator Maven / Gradle / Ivy

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/*
 * Copyright 2011-2015 PrimeFaces Extensions
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.primefaces.extensions.util;

import java.io.Serializable;
import java.util.Comparator;

import org.primefaces.extensions.model.timeline.TimelineEvent;

/**
 * Comparator for {@link TimelineEvent} to order their according start / end dates.
 *
 * @author  Oleg Varaksin / last modified by $Author: $
 * @version $Revision: 1.0 $
 */
public class TimelineEventComparator implements Comparator, Serializable {

	public int compare(TimelineEvent a, TimelineEvent b) {
		if (a.getStartDate().equals(b.getStartDate())) {
			if (a.getEndDate() == null && b.getEndDate() == null) {
				return 0;
			} else if (a.getEndDate() == null) {
				return -1;
			} else if (b.getEndDate() == null) {
				return 1;
			} else {
				return (a.getEndDate().before(b.getEndDate()) ? -1 : 1);
			}
		} else {
			return (a.getStartDate().before(b.getStartDate()) ? -1 : 1);
		}
	}
}