SyncPoint.java

/**
 * The contents of this file are subject to the OpenMRS Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://license.openmrs.org
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 *
 * Copyright (C) OpenMRS, LLC.  All Rights Reserved.
 */
package org.openmrs.module.sync;

import java.util.Comparator;

/**
 * Sync point: abstract concept representing a point in a continuous series. As a result, all it
 * needs to establish is order based on type T. Practically T is either Long (to represent sequence)
 * or timestamp.
 */
public class SyncPoint<T> implements Comparator<T> {
	
	private T value;
	
	public SyncPoint() {
	}
	
	public SyncPoint(T value) {
		this.value = value;
	}
	
	public T getValue() {
		return value;
	}
	
	public void setValue(T value) {
		this.value = value;
	}
	
	public int compare(T v1, T v2) {
		if (v1 instanceof Long && v2 instanceof Long) {
			if ((Long) v1 < (Long) v2)
				return -1;
			else if ((Long) v1 > (Long) v2)
				return 1;
			else
				return 0;
		} else
			throw new ClassCastException();
	}
	
}