com.github.zhangxd1989.basetool.db.handler.BeanHandler Maven / Gradle / Ivy

package com.github.zhangxd1989.basetool.db.handler;

import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;

/**
 * Bean对象处理器，只处理第一条数据
 *
 * @param  处理对象类型
 * @author sheldon
 */
public class BeanHandler implements RsHandler {

    private Class elementBeanType;

    /**
     * 创建一个 BeanHandler对象
     *
     * @param       处理对象类型
     * @param beanType Bean类型
     * @return BeanHandler对象
     */
    public static  BeanHandler create(Class beanType) {
        return new BeanHandler<>(beanType);
    }

    public BeanHandler(Class beanType) {
        this.elementBeanType = beanType;
    }

    @Override
    public E handle(ResultSet rs) throws SQLException {
        final ResultSetMetaData meta = rs.getMetaData();
        final int columnCount = meta.getColumnCount();
        return rs.next() ? HandleHelper.handleRow(columnCount, meta, rs, this.elementBeanType) : null;
    }
}