win.doyto.query.jdbc.rowmapper.JoinRowMapperResultSetExtractor Maven / Gradle / Ivy
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// Generated by delombok at Wed Nov 06 09:48:29 UTC 2024
/*
* Copyright © 2019-2024 Forb Yuan
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package win.doyto.query.jdbc.rowmapper;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* JoinRowMapperResultSetExtractor
*
* @author f0rb on 2022-03-26
*/
public class JoinRowMapperResultSetExtractor implements ResultSetExtractor>> {
private final String keyColumn;
private final Class keyClass;
private final RowMapper rowMapper;
private final Map rightMap = new HashMap<>();
public Map> extract(ResultSet rs) throws SQLException {
Map> results = new HashMap<>();
int rowNum = 0;
while (rs.next()) {
I key = rs.getObject(keyColumn, keyClass);
Object rKey = rs.getObject(2); // related entity id column
R row = rightMap.get(rKey);
if (row == null) {
row = this.rowMapper.map(rs, rowNum++);
rightMap.put(rKey, row);
}
List rows = results.computeIfAbsent(key, i -> new ArrayList<>());
rows.add(row);
}
return results;
}
@java.lang.SuppressWarnings("all")
@lombok.Generated
public JoinRowMapperResultSetExtractor(final String keyColumn, final Class keyClass, final RowMapper rowMapper) {
this.keyColumn = keyColumn;
this.keyClass = keyClass;
this.rowMapper = rowMapper;
}
}