java扩展Hibernate注解支持java8新时间类型

扩展hibernate注解@creationtimestamp，@updatetimestamp支持java8新的时间类型
hibernate version: 4.3.5.final

package com.hibernate.annotation;

import org.hibernate.hibernateexception;
import org.hibernate.tuple.annotationvaluegeneration;
import org.hibernate.tuple.valuegenerator;

import java.lang.annotation.annotation;
import java.sql.time;
import java.sql.timestamp;
import java.time.localdate;
import java.time.localdatetime;
import java.time.localtime;
import java.util.calendar;
import java.util.date;

/**
 * created with intellij idea.
 * user: zhonggang
 * date: 14-4-16
 * time: 上午11:40
 * <p/>
 * 支持java8新的时间包
 *
 * @see java.time.localdatetime
 * @see java.time.localdate
 * @see java.time.localtime
 */
public abstract class abstracttimegeneration<a extends annotation> implements annotationvaluegeneration<a> {
    protected valuegenerator<?> generator;

    @override
    public void initialize(a annotation, class<?> propertytype) {
        if (localdatetime.class.isassignablefrom(propertytype)) {
            generator = (session, owner) -> localdatetime.now();
        } else if (localdate.class.isassignablefrom(propertytype)) {
            generator = (session, owner) -> localdate.now();
        } else if (localtime.class.isassignablefrom(propertytype)) {
            generator = (session, owner) -> localtime.now();
        } else if (java.sql.date.class.isassignablefrom(propertytype)) {
            generator = (session, owner) -> new java.sql.date(new date().gettime());
        } else if (time.class.isassignablefrom(propertytype)) {
            generator = (session, owner) -> new time(new date().gettime());
        } else if (timestamp.class.isassignablefrom(propertytype)) {
            generator = (session, owner) -> new timestamp(new date().gettime());
        } else if (date.class.isassignablefrom(propertytype)) {
            generator = (session, owner) -> new date();
        } else if (calendar.class.isassignablefrom(propertytype)) {
            generator = (session, owner) -> {
                calendar calendar = calendar.getinstance();
                calendar.settime(new date());
                return calendar;
            };
        } else {
            throw new hibernateexception("unsupported property type for generator annotation " + annotation.getclass().getsimplename());
        }
    }

    @override
    public valuegenerator<?> getvaluegenerator() {
        return generator;
    }

    @override
    public boolean referencecolumninsql() {
        return false;
    }

    @override
    public string getdatabasegeneratedreferencedcolumnvalue() {
        return null;
    }
}