66 lines
2.3 KiB
Java
66 lines
2.3 KiB
Java
/*
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* Copyright 2022-2024 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package xyz.zhouxy.jdbc;
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import java.sql.ResultSet;
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import java.sql.ResultSetMetaData;
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import java.sql.SQLException;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* RowMapper
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*
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* <p>
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* {@link ResultSet} 中每一行数据的处理逻辑。
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* </p>
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*
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* @author <a href="http://zhouxy.xyz:3000/ZhouXY108">ZhouXY</a>
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* @since 1.0.0
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*/
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@FunctionalInterface
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public interface RowMapper<T> {
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T mapRow(ResultSet rs, int rowNumber) throws SQLException;
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/** 每一行数据转换为 {@link HashMap} */
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public static final RowMapper<Map<String, Object>> HASH_MAP_MAPPER = (rs, rowNumber) -> {
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Map<String, Object> result = new HashMap<>();
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ResultSetMetaData metaData = rs.getMetaData();
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int columnCount = metaData.getColumnCount();
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for (int i = 1; i <= columnCount; i++) {
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String colName = metaData.getColumnName(i);
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result.put(colName, rs.getObject(colName));
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}
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return result;
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};
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/** 每一行数据转换为 {@link DbRecord} */
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public static final RowMapper<DbRecord> RECORD_MAPPER =
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(rs, rowNumber) -> new DbRecord(HASH_MAP_MAPPER.mapRow(rs, rowNumber));
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/** 默认实现的将 {@link ResultSet} 转换为 Java Bean 的 {@link RowMapper}。 */
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public static <T> RowMapper<T> beanRowMapper(Class<T> beanType) throws SQLException {
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return DefaultBeanRowMapper.of(beanType);
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}
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/** 默认实现的将 {@link ResultSet} 转换为 Java Bean 的 {@link RowMapper}。 */
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public static <T> RowMapper<T> beanRowMapper(Class<T> beanType, Map<String, String> propertyColMap)
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throws SQLException {
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return DefaultBeanRowMapper.of(beanType, propertyColMap);
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}
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}
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