spring SqlRowSetResultSetExtractor 源码

spring SqlRowSetResultSetExtractor 代码

文件路径：/spring-jdbc/src/main/java/org/springframework/jdbc/core/SqlRowSetResultSetExtractor.java

/*
 * Copyright 2002-2018 the original author or authors.
 *
 * 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
 *
 *      https://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 org.springframework.jdbc.core;

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

import javax.sql.rowset.CachedRowSet;
import javax.sql.rowset.RowSetFactory;
import javax.sql.rowset.RowSetProvider;

import org.springframework.jdbc.support.rowset.ResultSetWrappingSqlRowSet;
import org.springframework.jdbc.support.rowset.SqlRowSet;

/**
 * {@link ResultSetExtractor} implementation that returns a Spring {@link SqlRowSet}
 * representation for each given {@link ResultSet}.
 *
 * <p>The default implementation uses a standard JDBC CachedRowSet underneath.
 *
 * @author Juergen Hoeller
 * @since 1.2
 * @see #newCachedRowSet
 * @see org.springframework.jdbc.support.rowset.SqlRowSet
 * @see JdbcTemplate#queryForRowSet(String)
 * @see javax.sql.rowset.CachedRowSet
 */
public class SqlRowSetResultSetExtractor implements ResultSetExtractor<SqlRowSet> {

	private static final RowSetFactory rowSetFactory;

	static {
		try {
			rowSetFactory = RowSetProvider.newFactory();
		}
		catch (SQLException ex) {
			throw new IllegalStateException("Cannot create RowSetFactory through RowSetProvider", ex);
		}
	}


	@Override
	public SqlRowSet extractData(ResultSet rs) throws SQLException {
		return createSqlRowSet(rs);
	}

	/**
	 * Create a {@link SqlRowSet} that wraps the given {@link ResultSet},
	 * representing its data in a disconnected fashion.
	 * <p>This implementation creates a Spring {@link ResultSetWrappingSqlRowSet}
	 * instance that wraps a standard JDBC {@link CachedRowSet} instance.
	 * Can be overridden to use a different implementation.
	 * @param rs the original ResultSet (connected)
	 * @return the disconnected SqlRowSet
	 * @throws SQLException if thrown by JDBC methods
	 * @see #newCachedRowSet()
	 * @see org.springframework.jdbc.support.rowset.ResultSetWrappingSqlRowSet
	 */
	protected SqlRowSet createSqlRowSet(ResultSet rs) throws SQLException {
		CachedRowSet rowSet = newCachedRowSet();
		rowSet.populate(rs);
		return new ResultSetWrappingSqlRowSet(rowSet);
	}

	/**
	 * Create a new {@link CachedRowSet} instance, to be populated by
	 * the {@code createSqlRowSet} implementation.
	 * <p>The default implementation uses JDBC 4.1's {@link RowSetFactory}.
	 * @return a new CachedRowSet instance
	 * @throws SQLException if thrown by JDBC methods
	 * @see #createSqlRowSet
	 * @see RowSetProvider#newFactory()
	 * @see RowSetFactory#createCachedRowSet()
	 */
	protected CachedRowSet newCachedRowSet() throws SQLException {
		return rowSetFactory.createCachedRowSet();
	}

}

相关信息

spring 源码目录

相关文章

spring ArgumentPreparedStatementSetter 源码

spring ArgumentTypePreparedStatementSetter 源码

spring BatchPreparedStatementSetter 源码

spring BeanPropertyRowMapper 源码

spring CallableStatementCallback 源码

spring CallableStatementCreator 源码

spring CallableStatementCreatorFactory 源码

spring ColumnMapRowMapper 源码

spring ConnectionCallback 源码

spring DataClassRowMapper 源码