package org.sxkj.common.handler;

import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.MappedJdbcTypes;
import org.apache.ibatis.type.MappedTypes;

import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * String 与 smallint/int 的类型转换处理器
 * 用于 Java 字段为 String 但数据库列为 smallint/int 的场景
 * 写入时将 String 转为 Integer，读取时将 Integer 转为 String
 */
@MappedTypes(String.class)
@MappedJdbcTypes(JdbcType.SMALLINT)
public class StringToIntegerTypeHandler extends BaseTypeHandler<String> {

	@Override
	public void setNonNullParameter(PreparedStatement ps, int i, String parameter, JdbcType jdbcType) throws SQLException {
		ps.setInt(i, Integer.parseInt(parameter));
	}

	@Override
	public String getNullableResult(ResultSet rs, String columnName) throws SQLException {
		Object value = rs.getObject(columnName);
		return value == null ? null : value.toString();
	}

	@Override
	public String getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
		Object value = rs.getObject(columnIndex);
		return value == null ? null : value.toString();
	}

	@Override
	public String getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
		Object value = cs.getObject(columnIndex);
		return value == null ? null : value.toString();
	}
}