randomidgenerator.java

EasyDBO是一个超轻量级对象-关系映射（Object/Relation Mapping

package com.easyjf.dbo;

//~--- JDK imports ------------------------------------------------------------

import java.util.*;

//~--- classes ----------------------------------------------------------------
/**
 * 
 * <p>
 * Title: 16位ID随机数生成器
 * </p>
 * 
 * <p>
 * Description:通过hashCode及系统当前时间生成一个唯一随机数.(需要进一步测试)
 * </p>
 * 
 * <p>
 * Copyright: Copyright (c) 2006
 * </p>
 * 
 * <p>
 * Company:EasyJF开源团队-EasyDBO项目组
 * </p>
 * 
 * @author 大峡
 * @version 1.0
 */
public class RandomIdGenerator implements IIdGenerator {
	private Date date;

	// ~--- constructors -------------------------------------------------------

	public RandomIdGenerator() {
		date = new Date();
	}

	// ~--- methods ------------------------------------------------------------

	public Object generator(Class classType) {
		return nextValue();
	}

	public Object generator(Class classType, String column) {
		return nextValue();
	}

	private String nextValue() {
		String id = this.hashCode() + "" + date.hashCode();
		return id.length()>16?id.substring(0, 16):id;
	}
}