spring AbstractLobHandler 源码
spring AbstractLobHandler 代码
文件路径：/spring-jdbc/src/main/java/org/springframework/jdbc/support/lob/AbstractLobHandler.java
/*
* Copyright 2002-2013 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.support.lob;
import java.io.InputStream;
import java.io.Reader;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.springframework.lang.Nullable;
/**
* Abstract base class for {@link LobHandler} implementations.
*
* <p>Implements all accessor methods for column names through a column lookup
* and delegating to the corresponding accessor that takes a column index.
*
* @author Juergen Hoeller
* @since 1.2
* @see java.sql.ResultSet#findColumn
*/
public abstract class AbstractLobHandler implements LobHandler {
@Override
@Nullable
public byte[] getBlobAsBytes(ResultSet rs, String columnName) throws SQLException {
return getBlobAsBytes(rs, rs.findColumn(columnName));
}
@Override
@Nullable
public InputStream getBlobAsBinaryStream(ResultSet rs, String columnName) throws SQLException {
return getBlobAsBinaryStream(rs, rs.findColumn(columnName));
}
@Override
@Nullable
public String getClobAsString(ResultSet rs, String columnName) throws SQLException {
return getClobAsString(rs, rs.findColumn(columnName));
}
@Override
@Nullable
public InputStream getClobAsAsciiStream(ResultSet rs, String columnName) throws SQLException {
return getClobAsAsciiStream(rs, rs.findColumn(columnName));
}
@Override
public Reader getClobAsCharacterStream(ResultSet rs, String columnName) throws SQLException {
return getClobAsCharacterStream(rs, rs.findColumn(columnName));
}
}
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